JP6694849B2

JP6694849B2 - Precast reinforced concrete pressure plate for ground anchor

Info

Publication number: JP6694849B2
Application number: JP2017090292A
Authority: JP
Inventors: 隆逸阿部; 貴則地神
Original assignee: 前田製管株式会社
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2020-05-20
Anticipated expiration: 2037-04-28
Also published as: JP2018188818A

Description

本発明は、グラウンドアンカー工法に用いられるグラウンドアンカー用のプレキャスト鉄筋コンクリート受圧板に関する。 The present invention relates to a precast reinforced concrete pressure receiving plate for a ground anchor used in a ground anchor construction method.

法面の安定化を図る工法の一例として、グラウンドアンカー工法が従来から広く知られている。このグラウンドアンカー工法は、地盤斜面に定着させたアンカーに緊張力を与え、この緊張力を地盤斜面上に設置した受圧板を介して地盤斜面側に伝達させることにより、地盤斜面の安定化を図る工法である。そして、従来からこの工法に用いられる受圧板として、グラウンドアンカー工法の工期短縮を図るため、下記のプレキャスト鉄筋コンクリート製の受圧板が提案されている。 The ground anchor construction method has been widely known as an example of a construction method for stabilizing the slope. This ground anchor construction method stabilizes the ground slope by applying tension to the anchor anchored on the ground slope and transmitting this tension to the ground slope via a pressure plate installed on the ground slope. It is a construction method. The pressure receiving plate made of precast reinforced concrete described below has been proposed as a pressure receiving plate used in this method in order to shorten the construction period of the ground anchor method.

特開平１０−８２０５２Japanese Patent Laid-Open No. 10-82052 特開平７−１２７０７１Japanese Patent Laid-Open No. 7-127071

しかし、上記従来のプレキャスト鉄筋コンクリート製の受圧板は、受圧面積が大きい場合には受圧板の寸法や重量も大きくなるため、斜面等の作業性の悪い現場では運搬や吊り上げの作業効率が悪くなるため、工期を思うように短縮できない場合が多かった。 However, since the pressure receiving plate made of the above-mentioned conventional precast reinforced concrete has large dimensions and weight when the pressure receiving area is large, the work efficiency of transportation and hoisting becomes poor at a site with poor workability such as a slope. In many cases, the construction period could not be shortened as desired.

また、グラウンドアンカー工法においては、アンカーを地盤斜面に対して垂直方向に打設するのが一般的であるが、地盤斜面の傾斜角度やすべり面の角度等によって地盤斜面に対して垂直方向から所定の角度（例えば−２０°ないし＋２０°傾斜した角度）をつけてアンカーを打設することがある。 In addition, in the ground anchor method, it is common to place anchors in a direction perpendicular to the ground slope, but it is possible to set the anchor from the vertical direction to the ground slope depending on the slope angle of the ground slope and the angle of the slip surface. The anchor may be driven at an angle (for example, an angle inclined from -20 ° to + 20 °).

このように、アンカーが地盤斜面に対して垂直方向に打設されておらず、アンカーが地盤斜面に設置した受圧板に対して垂直となる位置関係にない場合には、上記従来の受圧板ではその中心に形成されたアンカーの通し孔を、アンカーの受圧板に対する角度に応じてその都度掘削して拡げるなどして対応する必要があるため、受圧板の支圧応力が不足してクラックが生じたり、受圧板が割れる事態も生じていた。 In this way, when the anchor is not driven vertically to the ground slope and the anchor is not in a vertical position relative to the pressure plate installed on the ground slope, the conventional pressure plate described above is used. Since the through hole of the anchor formed in the center must be drilled and expanded each time according to the angle of the anchor with respect to the pressure receiving plate, the bearing pressure stress of the pressure receiving plate is insufficient and cracks occur. In some cases, the pressure receiving plate cracked.

本発明は、上記のような従来技術の欠点を解消するものであり、運搬や地盤斜面への設置が容易でグラウンドアンカー工法の工期短縮を図ることができ、アンカーが地盤斜面に対する垂直方向から所定の角度を有する場合であっても、受圧板を掘削等することなく地盤斜面に設置することができるとともに、クラックや割れが生じにくいグラウンドアンカー用プレキャスト鉄筋コンクリート受圧板を提供することを目的とする。 The present invention solves the above-mentioned drawbacks of the prior art, can be easily transported and installed on the ground slope, and can shorten the construction period of the ground anchor construction method. It is an object of the present invention to provide a precast reinforced concrete pressure receiving plate for a ground anchor, which can be installed on a ground slope without excavating even if the angle of the precast reinforced concrete pressure receiving plate is small.

上記目的を達成するため、本願請求項１に係る発明は、中心にアンカーを挿通させるための上部貫通孔が形成された定着部を備え該定着部から少なくとも三方向に突出するアーム部を備えた上部部材と、該上部部材の下方に組み合わせて一体化可能な板状体であって中心にアンカーを挿通させるための下部貫通孔が形成された下部部材と、開口部を備えた略円筒状の胴体部と該胴体部の上端に設けられ切欠き部を備えた略円形状の天板部からなる嵌め合わせ部材とを有し、前記開口部は前記胴体部の上端から下端にかけて形成され、前記切欠き部は前記天板部の外周縁から中心付近まで形成されるとともに前記開口部と通じており、前記下部部材の前記下部貫通孔に前記嵌め合わせ部材の前記胴体部を挿入することで、前記嵌め合わせ部材が前記下部部材に対して回動可能となることを特徴とする。 In order to achieve the above-mentioned object, the invention according to claim 1 of the present application includes a fixing portion having an upper through hole for inserting an anchor at the center, and an arm portion protruding from the fixing portion in at least three directions. An upper member, a lower member that is a plate-like member that can be combined and integrated below the upper member, and that has a lower through hole for inserting an anchor in the center, and a substantially cylindrical shape having an opening. A fitting member made of a substantially circular top plate portion having a notch portion provided at the upper end of the body portion, and the opening is formed from the upper end to the lower end of the body portion, The notch portion is formed from the outer peripheral edge of the top plate portion to the vicinity of the center and communicates with the opening portion, and by inserting the body portion of the fitting member into the lower through hole of the lower member, The fitting member is rotatable with respect to the lower member.

また、本願請求項２に係る発明は、前記嵌め合わせ部材の前記天板部の上面に開口部を備えた略円筒状の誘導部を有し、前記開口部は前記誘導部の上端から下端にかけて形成され前記天板部の前記切欠き部と通じていることを特徴とする。 The invention according to claim 2 of the present application has a substantially cylindrical guide portion having an opening on the upper surface of the top plate portion of the fitting member, and the opening extends from the upper end to the lower end of the guide portion. It is characterized in that it is formed and communicates with the cutout portion of the top plate portion.

また、本願請求項３に係る発明は、前記下部部材が、地盤斜面と一体化するための裏込め材または袋部材を有することを特徴とする。 Further, the invention according to claim 3 of the present application is characterized in that the lower member has a backfill material or a bag member for being integrated with the ground slope.

また、本願請求項４に係る発明は、前記下部部材が、長繊維補強シートによって被覆されることにより形成されているか、長繊維補強シートをコンクリートによって挟むことにより形成されているか、短繊維補強コンクリートによって形成されているか、または高強度コンクリートによって形成されているか、若しくはこれらの組み合わせにより形成されていることを特徴とする。 The invention according to claim 4 of the present application is whether the lower member is formed by being covered with a long fiber reinforcing sheet, is formed by sandwiching a long fiber reinforcing sheet between concretes, or short fiber reinforced concrete. It is characterized in that it is formed of, a high-strength concrete, or a combination thereof.

また、本願請求項５に係る発明は、前記上部部材の側面及び前記下部部材の側面にインサートが設けられていることを特徴とする。 The invention according to claim 5 of the present application is characterized in that inserts are provided on the side surfaces of the upper member and the side surfaces of the lower member.

上記より、請求項１に係る発明によれば、受圧板を分割して運搬することができるため、運搬を含めたの設置作業が容易となり、グラウンドアンカー工法の工期短縮を図ることができる。また、アンカーが地盤斜面における垂直方向に対し傾きを持つ場合であっても、受圧板を掘削等することなく地盤斜面に容易に設置することができる。 As described above, according to the invention of claim 1, since the pressure receiving plate can be divided and conveyed, the installation work including transportation can be facilitated and the construction period of the ground anchor construction method can be shortened. Further, even when the anchor has an inclination with respect to the vertical direction on the ground slope, the pressure receiving plate can be easily installed on the ground slope without excavating.

また、下部部材の下部貫通孔に挿入した嵌め合わせ部材の胴体部の開口部等にアンカーを挿通させながら下部部材を設置することで、受圧板の位置決め作業が容易となり、受圧板の設置作業の工期を短縮することができるとともに、アンカーを上部部材及び下部部材に当接させる事無く受圧板を設置できるため、アンカーを傷めずに設置作業を行うことができる。 Also, by installing the lower member while inserting the anchor into the opening of the body of the fitting member inserted into the lower through hole of the lower member, positioning work of the pressure receiving plate becomes easy, and installation work of the pressure receiving plate can be performed. Since the construction period can be shortened and the pressure receiving plate can be installed without contacting the upper member and the lower member with the anchor, installation work can be performed without damaging the anchor.

また、下部部材の下部貫通孔に嵌め合わせ部材の胴体部を挿入しながら下部部材を設置することで、下部部材に大きさの大きな下部貫通孔を形成することになる場合であっても、下部部材にクラックや割れが生じるのを防止することができる。 Further, even when the lower through-hole having a large size is formed in the lower member by installing the lower member while inserting the body portion of the fitting member into the lower through-hole of the lower member, It is possible to prevent the member from cracking or breaking.

また、請求項２に係る発明によれば、下部部材の下部貫通孔に挿入した嵌め合わせ部材の誘導部の開口部にもアンカーを挿通させながら下部部材を設置することで、受圧板の位置決め作業が更に容易となるため、受圧板の設置作業の工期をより短縮することができる。 According to the invention of claim 2, the lower member is installed while inserting the anchor into the opening of the guide portion of the fitting member inserted into the lower through hole of the lower member, thereby performing the positioning work of the pressure receiving plate. Since it becomes easier, the work period for installing the pressure receiving plate can be further shortened.

また、請求項３に係る発明によれば、受圧板を設置する地盤斜面に不陸がある場合であっても、受圧板（下部部材）にクラックや割れが発生することを防止することができる。 Further, according to the invention of claim 3, even when the ground slope on which the pressure receiving plate is installed is uneven, it is possible to prevent the pressure receiving plate (lower member) from being cracked or broken. ..

また、請求項４に係る発明によれば、下部部材が長繊維補強シートや短繊維補強コンクリートや高強度コンクリートによって補強されているため、受圧板（下部部材）に局部的な集中荷重が生じた場合であっても、受圧板（下部部材）にクラックや割れが生じるのを防止することができる。 Further, according to the invention of claim 4, since the lower member is reinforced by the long fiber reinforced sheet, the short fiber reinforced concrete or the high strength concrete, a localized concentrated load is generated on the pressure receiving plate (lower member). Even in this case, it is possible to prevent the pressure receiving plate (lower member) from being cracked or broken.

また、請求項５に係る発明によれば、インサートにチェーン等の連結部材が繋がれたボルトを螺合することで、上部部材及び下部部材をクレーン等で吊り上げて運搬することができる。また、受圧板を地盤斜面に複数設置したときは、上記ボルト及びチェーンを介して受圧板同士を連結することができる。そのため、地盤斜面において地滑り等が生じて一部の受圧板を固定したアンカーが切断された場合であっても、そのアンカーが切断された受圧板は周囲の受圧板によって支持されるため、受圧板の落下を防止することができる。 According to the invention of claim 5, the upper member and the lower member can be lifted and transported by a crane or the like by screwing a bolt having a connecting member such as a chain connected to the insert. Further, when a plurality of pressure receiving plates are installed on the ground slope, the pressure receiving plates can be connected to each other via the bolt and the chain. Therefore, even if landslides occur on the ground slope and the anchors that fix some pressure receiving plates are cut, the pressure receiving plates with the anchors cut are supported by the surrounding pressure receiving plates. Can be prevented from falling.

本発明に係る受圧板の分解斜視図である。It is a disassembled perspective view of the pressure receiving plate which concerns on this invention. 本発明に係る受圧板の斜視図である。It is a perspective view of the pressure receiving plate which concerns on this invention. 本発明に係る受圧板の設置工程における図２のＡ−Ａ線で切断した際の断面図である。It is sectional drawing when it cut | disconnects by the AA line of FIG. 2 in the installation process of the pressure receiving plate which concerns on this invention. 本発明に係る受圧板の設置工程における平面図である。It is a top view in the installation process of the pressure receiving plate which concerns on this invention. 本発明に係る受圧板の他の施工例の設置工程における図２のＡ−Ａ線で切断した際の断面図である。It is sectional drawing when it cut | disconnects by the AA line of FIG. 2 in the installation process of the other construction example of the pressure receiving plate which concerns on this invention. 本発明に係る受圧板の設置状態平面図である。It is an installation state top view of the pressure receiving plate concerning the present invention. 本発明の他の実施例に係る受圧板の分解斜視図である。FIG. 7 is an exploded perspective view of a pressure receiving plate according to another embodiment of the present invention. 本発明の他の実施例に係る受圧板の斜視図である。FIG. 6 is a perspective view of a pressure receiving plate according to another embodiment of the present invention. 本発明の他の実施例に係る受圧板の設置工程における図７のＧ−Ｇ線で切断した際の断面図である。FIG. 8 is a cross-sectional view of the pressure receiving plate according to another embodiment of the present invention, taken along line GG in FIG.

以下、本発明を図１ないし図８に従って説明する。尚、以下では本発明に係る実施形態を詳細に説明するが、本発明はこれに限定されるものではない。本発明に係るグラウンドアンカー用プレキャスト鉄筋コンクリート受圧板（以下「受圧板」という。）１は、上部部材２、下部部材３及び嵌め合わせ部材４からなる。 Hereinafter, the present invention will be described with reference to FIGS. The embodiments of the present invention will be described in detail below, but the present invention is not limited thereto. A precast reinforced concrete pressure receiving plate for ground anchor (hereinafter referred to as “pressure receiving plate”) 1 according to the present invention includes an upper member 2, a lower member 3 and a fitting member 4.

上部部材２は、図１及び図２に示すように、略八角柱状の定着部５を中央に有し、その定着部５から四方向に延びる略直方体状のアーム部６を有する略十字状で厚さの厚い板状のプレキャスト鉄筋コンクリート部材である。尚、上部部材２の厚さは定着部５が一番厚く、アーム部６の先端に行くにつれて徐々に薄くなるように形成されている。 As shown in FIGS. 1 and 2, the upper member 2 has a substantially octagonal column-shaped fixing portion 5 in the center, and a substantially cuboidal arm portion 6 extending in four directions from the fixing portion 5 and has a substantially cross shape. It is a thick plate-shaped precast reinforced concrete member. The upper member 2 is formed so that the fixing portion 5 has the largest thickness and becomes gradually thinner toward the tip of the arm portion 6.

尚、本実施例においてはアーム部６が四本設けられているが、三本以上であれば何本であってもよい。上記構造とすることで、上部部材２を略正方形状とした場合に比べて軽量化を図ることができるため、運搬を含めた設置作業が容易となる。また、アーム部６を定着部５の外周方向等間隔に三本以上設けることで、アンカー９から上部部材２の定着部５に伝わる緊張力（圧力）を下方部材３の広範囲に分散させることができる。 Although four arm portions 6 are provided in this embodiment, any number of arm portions 6 may be used as long as they are three or more. With the above structure, the weight can be reduced as compared with the case where the upper member 2 has a substantially square shape, so that the installation work including transportation becomes easy. Further, by providing three or more arm portions 6 at equal intervals in the outer peripheral direction of the fixing portion 5, the tension force (pressure) transmitted from the anchor 9 to the fixing portion 5 of the upper member 2 can be dispersed over a wide range of the lower member 3. it can.

定着部５の中心には、後述するアンカー９を挿通するための略円錐台形状の上部貫通孔１０が形成されている。また、定着部５の上面５ａ中央部には略正方形状に窪んだ凹部８が設けられ、その凹部８の底面８ａの中心には上部貫通孔１０の上端開口部が形成されている。そして上部貫通孔１０の側面は、上部部材２の底面２ｂにおける垂直方向に対して２０°の傾斜角を有する。尚、本実施例における上部貫通孔１０の側面の上記傾斜角は２０°であるが、その傾斜角は２０°以下であっても良い。 At the center of the fixing portion 5, a substantially frustoconical upper through hole 10 for inserting an anchor 9 described later is formed. Further, a concave portion 8 which is recessed in a substantially square shape is provided in the central portion of the upper surface 5a of the fixing portion 5, and an upper end opening portion of the upper through hole 10 is formed at the center of the bottom surface 8a of the concave portion 8. The side surface of the upper through hole 10 has an inclination angle of 20 ° with respect to the vertical direction on the bottom surface 2b of the upper member 2. The inclination angle of the side surface of the upper through hole 10 in this embodiment is 20 °, but the inclination angle may be 20 ° or less.

一方、アーム部６には、上部部材２と下部部材３を一体化させるために使用するボルト１２を挿通するためのボルト孔１３が形成されている。また、アーム部６の上面６ａには略正方形状に窪んだ凹部１１が設けられ、、その中心には、ボルト孔１３の上端開口部が形成されている。 On the other hand, a bolt hole 13 for inserting a bolt 12 used to integrate the upper member 2 and the lower member 3 is formed in the arm portion 6. Further, the upper surface 6a of the arm portion 6 is provided with a recess 11 recessed in a substantially square shape, and an upper end opening of the bolt hole 13 is formed at the center thereof.

定着部５の側面５ｂの中心にはそれぞれインサート１４が埋め込まれている。そのため、このインサート１４にチェーン等の連結部材が繋がれたボルト（図示せず）を螺合することで、上部部材２をクレーン等で吊り上げて運搬することができる。 Inserts 14 are embedded in the centers of the side surfaces 5b of the fixing portion 5, respectively. Therefore, by screwing a bolt (not shown) in which a connecting member such as a chain is connected to the insert 14, the upper member 2 can be lifted and transported by a crane or the like.

また、アーム部６の先端面６ｂの中心にもそれぞれインサート１７が設けられている。このインサート１７により、上記と同様にクレーン等で吊り上げて運搬する作業や、後述するように下部部材３を地盤斜面１０１に密着固定させ、地盤斜面１０１と一体化させる作業を行うことができる。 An insert 17 is also provided at the center of the tip surface 6b of the arm portion 6. With this insert 17, it is possible to carry out the work of hoisting and transporting with a crane or the like similarly to the above, and the work of bringing the lower member 3 into close contact with and fixing to the ground slope 101 as will be described later.

更に、上部部材２を下部部材３と一体化させて受圧板１を形成し地盤斜面１０１に設置した後に、インサート１７にチェーン１５等の連結部材が繋がれたボルト２５を螺合することで受圧板１同士を連結することができる。 Further, the upper member 2 is integrated with the lower member 3 to form the pressure receiving plate 1, and the pressure receiving plate 1 is installed on the ground slope 101. Then, the insert 17 is screwed with the bolt 25 to which the connecting member such as the chain 15 is connected to receive the pressure. The plates 1 can be connected to each other.

そのため、受圧板１を複数設置した地盤斜面１０１において、そのうちの一つの受圧板１を固定していたアンカー９が地滑り等により切断されてしまった場合であっても、その周囲に位置しチェーン１５等の連結部材で連結された他の受圧板１，１・・・により、アンカー９が切断された受圧板１の落下を防止することができる。 Therefore, in the ground slope 101 where a plurality of pressure receiving plates 1 are installed, even if the anchor 9 that fixes one of the pressure receiving plates 1 is cut due to landslide or the like, it is located around the chain 15 and It is possible to prevent the pressure receiving plate 1 from which the anchor 9 is cut from falling by the other pressure receiving plates 1, 1 ...

下部部材３は、図１及び図２に示すように、略正方形状であって四隅が切り欠かれ、全体の厚さがほぼ均一で厚さの厚い板状の部材である。この下部部材４はプレキャスト鉄筋コンクリート部材であり、その中心には後述するアンカー９を挿通するための略円錐台形状の下部貫通孔２０が形成されている。そしてその下部貫通孔２０の側面は、下部部材３の底面３ｂにおける垂直方向に対して２０°の傾斜角を有する。尚、本実施例における下部貫通孔２０の側面の上記傾斜角は２０°であるが、その傾斜角は２０°以下であっても良い。そしてその傾斜角は、上部貫通孔１０の側面の上記傾斜角と等しい事が望ましい。また、本実施例の下部部材３は略正方形状であるが、略円形状であってもよい。 As shown in FIGS. 1 and 2, the lower member 3 is a plate-shaped member having a substantially square shape, four corners notched, and a substantially uniform overall thickness and a large thickness. The lower member 4 is a precast reinforced concrete member, and a substantially circular truncated cone-shaped lower through hole 20 for inserting an anchor 9 described later is formed at the center thereof. The side surface of the lower through hole 20 has an inclination angle of 20 ° with respect to the vertical direction on the bottom surface 3b of the lower member 3. Although the inclination angle of the side surface of the lower through hole 20 in this embodiment is 20 °, the inclination angle may be 20 ° or less. The inclination angle is preferably equal to the inclination angle of the side surface of the upper through hole 10. Further, although the lower member 3 of this embodiment has a substantially square shape, it may have a substantially circular shape.

尚、下部部材３の上面３ａにおける下部貫通孔２０の上端開口部の直径Ｂは、上部部材２の底面２ｂにおける上部貫通孔１０の下端開口部の直径とほぼ等しい大きさに形成されている。 The diameter B of the upper end opening of the lower through hole 20 on the upper surface 3a of the lower member 3 is substantially equal to the diameter of the lower end opening of the upper through hole 10 on the bottom surface 2b of the upper member 2.

また、下部部材３の上面３ａにおける下部貫通孔２０の上端開口部の周囲には、その上端開口部を内径とする円環状の凹みである環状凹部２１が形成されている。この環状凹部２１は、後述する嵌め合わせ部４を嵌合させるための凹みである。 Further, on the upper surface 3a of the lower member 3, around the upper end opening of the lower through hole 20, an annular recess 21 which is an annular recess having an inner diameter at the upper end opening is formed. The annular recess 21 is a recess for fitting the fitting portion 4 described later.

また、下部部材３の上面３ａには、上部部材２を下部部材３の上面３ａに固定し一体化するためのボルト１２を螺合するためのインサート２２が埋め込まれている。このインサート２２は、下部部材３の上面３ａに上部部材２を設置した際に、上部部材２のボルト孔１３の位置に相当する位置に形成されている。 Further, an insert 22 for screwing a bolt 12 for fixing and integrating the upper member 2 to the upper surface 3a of the lower member 3 is embedded in the upper surface 3a of the lower member 3. The insert 22 is formed at a position corresponding to the position of the bolt hole 13 of the upper member 2 when the upper member 2 is installed on the upper surface 3 a of the lower member 3.

上記構造により、下部部材３の上面３ａに上部部材２をボルト１２で固定して一体化させることにより、上部部材２の上部貫通孔１０と下部部材３の下部貫通孔２０が通じた状態となるとともに連続した一つ略円錐台形状の貫通孔２３を形成した状態となる。また、上部部材２は、下部部材３の上面３ａ内に収まった状態となる。 With the above structure, the upper member 2 is fixed to the upper surface 3a of the lower member 3 by the bolts 12 and integrated, whereby the upper through hole 10 of the upper member 2 and the lower through hole 20 of the lower member 3 are communicated with each other. With this, a continuous through hole 23 having a substantially truncated cone shape is formed. Further, the upper member 2 is in a state of being housed within the upper surface 3 a of the lower member 3.

下部部材３の側面３ｃであって四隅の切欠かれた箇所には、それぞれインサート２４が設けられている。このインサート２４にチェーン等の連結部材が繋がれたボルト（図示せず）を螺合することで、下部部材３をクレーン等で吊り上げて運搬することができる。また、上部部材２を下部部材３と一体化させて受圧板１を形成し地盤斜面１０１に設置した後は、インサート２４にチェーン１５等の連結部材が繋がれたボルト２５を螺合して受圧板１同士を連結することで、上記の場合と同様に受圧板１の落下を防止することができる。 Inserts 24 are provided on the side surfaces 3c of the lower member 3 at the four corners that are cut out. By screwing a bolt (not shown) in which a connecting member such as a chain is connected to the insert 24, the lower member 3 can be lifted and transported by a crane or the like. Further, after the upper member 2 is integrated with the lower member 3 to form the pressure receiving plate 1 and the pressure receiving plate 1 is installed on the ground slope 101, a bolt 25 having a connecting member such as a chain 15 connected to the insert 24 is screwed to receive the pressure. By connecting the plates 1 to each other, the pressure receiving plate 1 can be prevented from falling, as in the case described above.

尚、アンカー９に受圧板１を固定する際に、地盤斜面１０１が不陸であると、下部部材３への局部的な集中荷重により下部部材３にクラックや割れが発生する場合がある。そのため、アラミド繊維、カーボン繊維、ポリアリレート繊維等の長繊維補強シートによって下部部材３を被覆して補強してもよい。また、長繊維補強シートをコンクリートで挟むことによって下部部材３を形成したり、コンクリートに短繊維を混合して下部部材３を形成したり、高強度コンクリートを用いて下部部材３を形成したりすることにより補強してもよい。更には、上記補強を組み合わせて下部部材３を形成してもよい（図示せず）。 When the pressure receiving plate 1 is fixed to the anchor 9, if the ground slope 101 is uneven, a localized concentrated load on the lower member 3 may cause cracks or breaks in the lower member 3. Therefore, the lower member 3 may be covered and reinforced with a long fiber reinforcing sheet such as an aramid fiber, a carbon fiber, or a polyarylate fiber. Further, the lower member 3 is formed by sandwiching a long fiber reinforced sheet with concrete, the lower member 3 is formed by mixing short fibers with concrete, or the lower member 3 is formed using high strength concrete. You may reinforce by doing so. Further, the lower member 3 may be formed by combining the above reinforcements (not shown).

嵌め合わせ部材４は、厚さの薄い鋼板等からなる金属製の部材であって、図１に示すように、胴体部２６と天板部２８からなる。胴体部２６は、略円筒状であって、その長さは下部部材３の厚さよりやや短く形成されている。また、胴体部２６には、その上端から下端にかけて延びる隙間である開口部２６ａが形成されている。この開口部２６ａの幅は、アンカー９の外径よりも広く形成されている。また、胴体部２６の外径の大きさは、下部部材３の上面３ａにおける下部貫通孔２０の上端開口部の直径Ｂの大きさとほぼ等しいかやや小さく形成されている。 The fitting member 4 is a metal member made of a thin steel plate or the like, and includes a body portion 26 and a top plate portion 28 as shown in FIG. 1. The body portion 26 has a substantially cylindrical shape, and its length is formed slightly shorter than the thickness of the lower member 3. Further, the body portion 26 is formed with an opening portion 26a which is a gap extending from the upper end to the lower end thereof. The width of the opening 26 a is formed wider than the outer diameter of the anchor 9. The outer diameter of the body portion 26 is formed to be substantially equal to or slightly smaller than the diameter B of the upper end opening of the lower through hole 20 on the upper surface 3a of the lower member 3.

天板部２８は、略円形状の板状体であって胴体部２６の上端に設けられている。この天板部２８の外径は、胴体部２６の外径よりも大きく形成され、略円筒状の胴体部２６の中心軸上に略円形状の天板部２８の中心が位置するように固定されているため、天板部２８の周縁部が胴体部２６の上端から外側に向けてほぼ均等に突出した状態となっている。また、天板部２８の外径の大きさは、下部部材３の環状凹部２１の外径とほぼ同じかやや小さく形成されている。 The top plate portion 28 is a substantially circular plate-shaped body and is provided at the upper end of the body portion 26. The outer diameter of the top plate portion 28 is formed larger than the outer diameter of the body portion 26, and is fixed so that the center of the substantially circular top plate portion 28 is located on the central axis of the substantially cylindrical body portion 26. Therefore, the peripheral portion of the top plate portion 28 is in a state of protruding substantially uniformly outward from the upper end of the body portion 26. Further, the outer diameter of the top plate portion 28 is formed to be substantially the same as or slightly smaller than the outer diameter of the annular recess 21 of the lower member 3.

また、天板部２８には、その外周縁から中心を越えて少し先まで切欠かれた切欠き部２８ａが形成されている。この切欠き部２８ａの幅は、胴体部２６の開口部２６ａの幅とほぼ等しい幅であって、アンカー９の外径よりも広く形成されている。また、切欠き部２８ａは、開口部２６ａと通じる位置に形成されている。 Further, the top plate portion 28 is formed with a cutout portion 28a that is cut away from the outer peripheral edge of the top plate portion 28 beyond the center to a little point. The width of the cutout portion 28 a is substantially equal to the width of the opening portion 26 a of the body portion 26, and is formed wider than the outer diameter of the anchor 9. The cutout portion 28a is formed at a position communicating with the opening 26a.

上記構造により、下部部材３の下部貫通孔２０に嵌め合わせ部材４の胴体部２６を挿入することができる。また、胴体部２６を奥まで挿入することで、嵌め合わせ部材４の天板部２８と下部部材３の環状凹部２１とを嵌合させることができるとともに、下部部材３の上面３ａと嵌め合わせ部材４の天板部２８の上面２８ｂを面一にすることができる。また、上記のように嵌合させることで、嵌め合わせ部材４が下部部材３に対して水平方向に回動可能な状態となる。 With the above structure, the body portion 26 of the fitting member 4 can be inserted into the lower through hole 20 of the lower member 3. Further, by inserting the body portion 26 deeply, the top plate portion 28 of the fitting member 4 and the annular recess 21 of the lower member 3 can be fitted together, and the upper surface 3a of the lower member 3 and the fitting member. The upper surface 28b of the top plate portion 28 of No. 4 can be made flush. Further, by fitting as described above, the fitting member 4 becomes in a state of being rotatable with respect to the lower member 3 in the horizontal direction.

また、下部部材３の下部貫通孔２０に嵌め合わせ部材４の胴体部２６を挿入して、嵌め合わせ部材４の天板部２８と下部部材３の環状凹部２１とを嵌合させた状態で下部部材３を設置することで、図３−１等に示すように、胴体部２６の下端部が後述する地盤斜面１０１の上に施工された裏込め材等と接する状態となる。 Further, the body portion 26 of the fitting member 4 is inserted into the lower through hole 20 of the lower member 3, and the top plate portion 28 of the fitting member 4 and the annular recess 21 of the lower member 3 are fitted to each other. By installing the member 3, as shown in FIG. 3A and the like, the lower end portion of the body portion 26 comes into contact with a backfilling material or the like constructed on the ground slope 101 described later.

そのため、下部部材３に大きさの大きな略円錐台形状の下部貫通孔２０を形成することにより下部部材３の支圧応力が低下しても、受圧板１をアンカー９に固定することによりアンカー９から下部部材３に伝わる緊張力（圧力）の一部を嵌め合わせ部材４によって支持することとなるため、下部部材３にクラックや割れが生じるのを防止することができる。 Therefore, even if the bearing stress of the lower member 3 is reduced by forming the large through-hole 20 having a large truncated cone shape in the lower member 3, the anchor 9 is fixed by fixing the pressure receiving plate 1 to the anchor 9. Since a part of the tension force (pressure) transmitted from the lower member 3 to the lower member 3 is supported by the fitting member 4, it is possible to prevent the lower member 3 from being cracked or broken.

また、嵌め合わせ部材４の長さ方向Ｃに対して傾きを持つアンカー９であっても、その傾きが２０°以下である場合は、嵌め合わせ部材４の切欠き部２８ａやそれに通じる開口部２６ａに通すことでアンカー９を嵌め合わせ部材４に挿通させることができる。 Further, even if the anchor 9 has an inclination with respect to the longitudinal direction C of the fitting member 4, if the inclination is 20 ° or less, the cutout portion 28a of the fitting member 4 and the opening portion 26a communicating therewith. The anchor 9 can be inserted into the fitting member 4 by passing through.

そのため、下部部材３の下部貫通孔２０に挿通させたアンカー９を嵌め合わせ部材４に挿通させた状態で、下部部材３の下部貫通孔２０に嵌め合わせ部材４の胴体部２６を挿入し、下部部材３を地盤斜面１０１に設置することで、下部部材３の上面３ａに固定する上部部材２の上部貫通孔１０にもアンカー９を挿通できる状態となるため、受圧板１の位置決め作業が容易となり、受圧板１の設置作業の工期を短縮することができる。 Therefore, the body portion 26 of the fitting member 4 is inserted into the lower through hole 20 of the lower member 3 with the anchor 9 inserted through the lower through hole 20 of the lower member 3 being inserted into the fitting member 4. By installing the member 3 on the ground slope 101, the anchor 9 can be inserted into the upper through hole 10 of the upper member 2 fixed to the upper surface 3a of the lower member 3, so that the positioning work of the pressure receiving plate 1 becomes easy. It is possible to shorten the construction period of the work for installing the pressure receiving plate 1.

また、上記受圧板１の構造により、上部部材２と、嵌め合わせ部材４を嵌合させた状態の下部部材３とを一体化させることで、連続した一つの略円錐台形状の貫通孔２３が形成される（図２参照）。そのため、アンカー９が地盤斜面１０１における垂直方向に対し傾きを持つ場合であっても、その角度が２０°以下である場合は、受圧板１の貫通孔２３を掘削等することなくアンカー９を貫通孔２３に挿通させながら受圧板１を地盤斜面１０１に設置することができる。また、受圧板１を設置する際に、アンカー９を貫通孔２３に接触させる事無く上部部材２の凹部８へ導くことができるため、アンカー９を傷めることなく受圧板１を地盤斜面１０１に設置することができる。 Further, by the structure of the pressure receiving plate 1, the upper member 2 and the lower member 3 in the state where the fitting member 4 is fitted are integrated to form one continuous substantially frustoconical through hole 23. Formed (see FIG. 2). Therefore, even if the anchor 9 is inclined with respect to the vertical direction on the ground slope 101, if the angle is 20 ° or less, the anchor 9 is penetrated without excavating the through hole 23 of the pressure receiving plate 1. The pressure receiving plate 1 can be installed on the ground slope 101 while inserting it into the hole 23. Further, when the pressure receiving plate 1 is installed, the anchor 9 can be guided to the concave portion 8 of the upper member 2 without contacting the through hole 23, so that the pressure receiving plate 1 is installed on the ground slope 101 without damaging the anchor 9. can do.

尚、上記の様に受圧板１は上部部材２、下部部材３及び嵌め合わせ部材４に分解して運搬し設置することができるため、斜面のように作業性の悪い現場であっても、受圧板１の設置作業が容易となり、グラウンドアンカー工法の工期を短縮することができる。 As described above, since the pressure receiving plate 1 can be disassembled into the upper member 2, the lower member 3 and the fitting member 4 for transportation and installation, even if the workability is poor such as a slope, the pressure receiving plate 1 can be received. The installation work of the board 1 becomes easy, and the construction period of the ground anchor construction method can be shortened.

３９は、他の実施例に係る受圧板であって、上部部材２と下部部材３と嵌め合わせ部材２９からなる。嵌め合わせ部材２９は、厚さの薄い鋼板等からなる金属製の部材であって、図６に示すように、胴体部３０と天板部３１と誘導部３２からなる。尚、胴体部３０と天板部３１は、上記実施例の嵌め合わせ部材４の胴体部２６及び天板部２８と同様の構造であるため、その説明は省略する。また、上部部材２及び下部部材３についても上記実施例と同様な構造であるため、その説明も省略する。 Reference numeral 39 denotes a pressure receiving plate according to another embodiment, which includes an upper member 2, a lower member 3, and a fitting member 29. The fitting member 29 is a metal member made of a thin steel plate or the like, and includes a body portion 30, a top plate portion 31, and a guiding portion 32, as shown in FIG. Since the body portion 30 and the top plate portion 31 have the same structure as the body portion 26 and the top plate portion 28 of the fitting member 4 of the above-described embodiment, the description thereof will be omitted. Further, since the upper member 2 and the lower member 3 have the same structure as that of the above-mentioned embodiment, the description thereof will be omitted.

天板部３１の上面３１ｂには誘導部３２が固定されている。この誘導部３２は、その外径が胴体部３０の外径よりも小さい略円筒状であって、その中心軸が胴体部３０の中心軸と一致する位置に固定されている。そして、誘導部３２の外径の大きさは、上部部材２の凹部８の上面８ａにおける上部貫通孔１０の上端開口部の直径Ｄの大きさとほぼ等しいかやや大きく形成されている。また、誘導部３２の長さは、上部部材２の定着部５の厚さよりも短く形成されている。 A guide portion 32 is fixed to the upper surface 31b of the top plate portion 31. The guide portion 32 has a substantially cylindrical shape whose outer diameter is smaller than the outer diameter of the body portion 30, and is fixed at a position where its central axis coincides with the central axis of the body portion 30. The outer diameter of the guide portion 32 is formed to be substantially equal to or slightly larger than the diameter D of the upper end opening of the upper through hole 10 on the upper surface 8a of the recess 8 of the upper member 2. Further, the length of the guide portion 32 is formed to be shorter than the thickness of the fixing portion 5 of the upper member 2.

また、誘導部３２には、その上端から下端にかけて延びる隙間である開口部３２ａが形成されている。この開口部３２ａの幅は、アンカー９の外径よりも広く形成されているとともに、天板部３１の切欠き部３１ａの幅及び胴体部３０の開口部３０ａの幅とほぼ等しい幅に形成されている。そして、開口部３２ａは天板部３１の切欠き部３１ａと通じる位置に形成されている。 Further, the guide portion 32 is formed with an opening 32a which is a gap extending from the upper end to the lower end thereof. The width of the opening 32a is formed to be wider than the outer diameter of the anchor 9, and is formed to be substantially equal to the width of the cutout portion 31a of the top plate portion 31 and the width of the opening portion 30a of the body portion 30. ing. The opening 32a is formed at a position communicating with the cutout portion 31a of the top plate portion 31.

尚、天板部３１の中央付近に形成されている切欠き部３１ａの端部は、略円筒状の誘導部３２の内側に納まるように形成されている。 The end of the notch 31a formed near the center of the top plate 31 is formed so as to fit inside the substantially cylindrical guide portion 32.

上記構造により、図６及び図７に示すように、下部部材３の下部貫通孔２０に嵌め合わせ部材２９の胴体部３０を挿入することができる。また、胴体部３０を奥まで挿入することで嵌め合わせ部材２９の天板部３１と下部部材３の環状凹部２１とを嵌合させることができるとともに、下部部材３の上面３ａと嵌め合わせ部材２９の天板部３１の上面３１ｂを面一にすることができる。また、嵌合させることで、嵌め合わせ部材２９が下部部材３に対して水平方向に回動可能な状態となる。 With the above structure, as shown in FIGS. 6 and 7, the body portion 30 of the fitting member 29 can be inserted into the lower through hole 20 of the lower member 3. Also, by inserting the body portion 30 to the back, the top plate portion 31 of the fitting member 29 and the annular recess 21 of the lower member 3 can be fitted together, and the upper surface 3a of the lower member 3 and the fitting member 29. The upper surface 31b of the top plate portion 31 can be made flush. Further, by fitting, the fitting member 29 is in a state of being horizontally rotatable with respect to the lower member 3.

そして、上部部材２の上部貫通孔１０に嵌め合わせ部材２９の誘導部３２を挿入しながら下部部材３の上面３ａに上部部材２をボルト１２で固定することで一体化させることができる。このとき、誘導部３２の上端が上部部材２の凹部８の底面８ａとほぼ同じ高さか、底面８ａよりやや低い高さとなる。 Then, the guide member 32 of the fitting member 29 is inserted into the upper through hole 10 of the upper member 2, and the upper member 2 is fixed to the upper surface 3a of the lower member 3 with the bolts 12 to be integrated. At this time, the upper end of the guide portion 32 has substantially the same height as the bottom surface 8a of the recess 8 of the upper member 2 or a height slightly lower than the bottom surface 8a.

また、下部部材３の下部貫通孔２０に嵌め合わせ部材２９の胴体部３０を挿入して、嵌め合わせ部材２９の天板部３１と下部部材３の環状凹部２１とを嵌合させた状態で下部部材３を設置することで、図８に示すように、胴体部３０の下端部が後述する地盤斜面１０１の上に施工された裏込め材等と接する状態となる。 Further, the body portion 30 of the fitting member 29 is inserted into the lower through hole 20 of the lower member 3, and the top plate portion 31 of the fitting member 29 and the annular recess 21 of the lower member 3 are fitted to each other. By installing the member 3, as shown in FIG. 8, the lower end portion of the body portion 30 comes into contact with a backfill material or the like constructed on the ground slope 101 described later.

そのため、下部部材３に大きさの大きな略円錐台形状の下部貫通孔２０を形成することにより下部部材３の支圧応力が低下しても、受圧板３９をアンカー９に固定することによりアンカー９から下部部材３に伝わる緊張力（圧力）の一部を嵌め合わせ部材２９によって支持することとなるため、下部部材３にクラックや割れが生じるのを防止することができる。 Therefore, even if the bearing stress of the lower member 3 is reduced by forming the large-sized substantially circular truncated cone-shaped lower through hole 20 in the lower member 3, the anchor 9 is fixed by fixing the pressure receiving plate 39 to the anchor 9. Since a part of the tension (pressure) transmitted from the lower member 3 to the lower member 3 is supported by the fitting member 29, it is possible to prevent the lower member 3 from being cracked or broken.

また、嵌め合わせ部材２９の長さ方向Ｅに対して傾きを持つアンカー９であっても、その角度が２０°以下である場合は、嵌め合わせ部材２９の切欠き部３１ａやそれに通じる開口部３０ａ，３２ａ内に通すことでアンカー９を嵌め合わせ部材２９に挿通させることができる。 Further, even if the anchor 9 has an inclination with respect to the length direction E of the fitting member 29, if the angle is 20 ° or less, the notch 31a of the fitting member 29 and the opening 30a leading to it. , 32a, the anchor 9 can be inserted into the fitting member 29.

そのため、下部部材３の下部貫通孔２０に挿通させたアンカー９を嵌め合わせ部材２９に挿通させた状態で、下部部材３の下部貫通孔２０に嵌め合わせ部材２９の胴体部３０を挿入し、下部部材３を地盤斜面１０１に設置することで、下部部材３の上面３ａに固定する上部部材２の上部貫通孔１０にもアンカー９をより正確且つ容易に挿通できる状態となるため、受圧板３９の位置決め作業が更に容易となり、受圧板３９の設置作業の工期を短縮することができる。 Therefore, with the anchor 9 inserted through the lower through hole 20 of the lower member 3 inserted through the fitting member 29, the body portion 30 of the fitting member 29 is inserted into the lower through hole 20 of the lower member 3, By installing the member 3 on the ground slope 101, the anchor 9 can be more accurately and easily inserted into the upper through hole 10 of the upper member 2 fixed to the upper surface 3a of the lower member 3, so that the pressure receiving plate 39 The positioning work is further facilitated, and the work period for installing the pressure receiving plate 39 can be shortened.

また、上記受圧板３９の構造により、アンカー９が地盤斜面１０１における垂直方向に対し２０°以下の傾きを持つ場合は、受圧板３９を設置する際にアンカー９を貫通孔２３に接触させる事無く上部部材２の凹部８へ導くことができるため、アンカー９を傷めることなく受圧板３９を地盤斜面１０１に設置することができる。 Further, due to the structure of the pressure receiving plate 39, when the anchor 9 has an inclination of 20 ° or less with respect to the vertical direction on the ground slope 101, the anchor 9 is not brought into contact with the through hole 23 when the pressure receiving plate 39 is installed. Since it can be guided to the recess 8 of the upper member 2, the pressure receiving plate 39 can be installed on the ground slope 101 without damaging the anchor 9.

尚、上記のように受圧板３９は上部部材２、下部部材３及び嵌め合わせ部材２９に分解して運搬し設置することができるため、斜面のように作業性の悪い現場であっても、受圧板３９の設置作業が容易となり、グラウンドアンカー工法の工期を短縮することができる。 As described above, the pressure receiving plate 39 can be disassembled into the upper member 2, the lower member 3, and the fitting member 29 to be transported and installed, so that the pressure receiving plate 39 can receive pressure even in a work site such as a slope where workability is poor. The installation work of the plate 39 becomes easy, and the construction period of the ground anchor construction method can be shortened.

以下、本発明に係る受圧板１の施工方法について説明する。まず、受圧板１を設置する傾斜した地盤斜面１０１を削孔して削孔穴１０２を形成し、その削孔穴１０２内にアンカー９を挿入するとともにグラウト材（図示せず）を注入打設してアンカー９の一端を削孔穴１０２内に固着させる。そして、アンカー９の他端は地盤斜面１０１から露出させる。 Hereinafter, a method of constructing the pressure receiving plate 1 according to the present invention will be described. First, the sloped ground slope 101 on which the pressure receiving plate 1 is installed is drilled to form a drilled hole 102, the anchor 9 is inserted into the drilled hole 102, and a grout material (not shown) is injected and placed. One end of the anchor 9 is fixed in the drilled hole 102. Then, the other end of the anchor 9 is exposed from the ground slope 101.

次に、上部部材２と下部部材３と嵌め合わせ部材４をそれぞれトラック等により現場まで運ぶ。そして、下部部材３の側面３ｃのインサート２４にチェーン等の連結部材が繋がれたボルト（図示せず）を螺合して下部部材３をクレーン等で吊り上げ、下部貫通孔２０にアンカー９を挿通しながら地盤斜面１０１に設置する。 Next, the upper member 2, the lower member 3, and the fitting member 4 are carried to the site by a truck or the like. Then, a bolt (not shown) in which a connecting member such as a chain is connected is screwed into the insert 24 on the side surface 3c of the lower member 3, the lower member 3 is lifted by a crane, and the anchor 9 is inserted into the lower through hole 20. While installing it on the ground slope 101.

尚、この下部部材３はプレキャスト鉄筋コンクリート製のものを使用するが、上記アラミド繊維等の長繊維補強シートによって被覆して補強したものを使用してもよい。また、長繊維補強シートをコンクリートによって挟んで形成することにより補強した下部部材３や、コンクリートに短繊維を混合して形成することにより補強した下部部材３や、高強度コンクリートを用いて形成することにより補強した下部部材３を使用してもよい。更には、上記補強を組み合わせて形成した下部部材３を使用してもよい。 Although the lower member 3 is made of precast reinforced concrete, it may be reinforced by covering it with a long fiber reinforcing sheet such as the above aramid fiber. Also, a lower member 3 reinforced by sandwiching a long fiber reinforced sheet between concrete, a lower member 3 reinforced by mixing short fibers into concrete, or a high-strength concrete. You may use the lower member 3 reinforced by. Furthermore, you may use the lower member 3 formed combining the said reinforcement.

下部部材３を設置する際、アンカー９が地盤斜面１０１に対して略垂直方向に延びる場合であれば、下部貫通孔２０に挿通させたアンカー９を嵌め合わせ部材４に挿通させながら、その胴体部２６を下部部材３の下部貫通孔２０に挿入し、天板部２８と下部部材３の環状凹部２１とを嵌合させることができる位置、具体的にはアンカー９を嵌め合わせ部材４における天板部２８の切欠き部２８ａの端部付近（天板部２８の中心付近）に挿通させながら嵌め合わせ部材４の天板部２８と下部部材３の環状凹部２１とを嵌合させることができる位置に下部部材３を設置する。 When installing the lower member 3, if the anchor 9 extends in a direction substantially perpendicular to the ground slope 101, while inserting the anchor 9 inserted into the lower through hole 20 into the fitting member 4, the body portion thereof. 26 is inserted into the lower through hole 20 of the lower member 3, and the top plate portion 28 and the annular recess 21 of the lower member 3 can be fitted to each other, specifically, the anchor 9 is fitted to the top plate of the fitting member 4. A position where the top plate portion 28 of the fitting member 4 and the annular recess 21 of the lower member 3 can be fitted while being inserted near the end of the cutout portion 28a of the portion 28 (near the center of the top plate portion 28). The lower member 3 is installed in.

一方、図３−１に示すように、アンカー９が地盤斜面１０１の垂直方向に対して２０°以下の傾きを持つ場合であれば、アンカー９を嵌め合わせ部材４の胴体部２６の開口部２６ａ内や天板部２８の切欠き部２８ａ内に挿通させながら嵌め合わせ部材４の天板部２８と下部部材３の環状凹部２１とを嵌合させることができる位置に下部部材３を設置する。 On the other hand, as shown in FIG. 3A, when the anchor 9 has an inclination of 20 ° or less with respect to the vertical direction of the ground slope 101, the anchor 9 is inserted into the opening 26 a of the body 26 of the fitting member 4. The lower member 3 is installed at a position where the top plate portion 28 of the fitting member 4 and the annular recess 21 of the lower member 3 can be fitted to each other while being inserted inside or in the notch portion 28a of the top plate portion 28.

尚、嵌め合わせ部材４の胴体部２６を下部部材３の下部貫通孔２０に挿入するときは、アンカー９の地盤斜面１０１の垂直方向に対する傾き及びその方向に合わせて嵌め合わせ部材４を水平方向に回転させて開口部２６ａや切欠き部２８ａの位置を調節し、アンカー９を開口部２６ａや切欠き部２８ａ内に挿通させながら胴体部２６を下部貫通孔２０に挿入する。 When inserting the body portion 26 of the fitting member 4 into the lower through hole 20 of the lower member 3, the fitting member 4 is horizontally moved in accordance with the inclination of the ground slope 101 of the anchor 9 with respect to the vertical direction and the direction thereof. The body portion 26 is inserted into the lower through hole 20 while rotating to adjust the positions of the opening portion 26a and the cutout portion 28a and inserting the anchor 9 into the opening portion 26a and the cutout portion 28a.

そして、上部部材２の定着部５の側面５ｂのインサート１４またはアーム部６の先端面６ａのインサート１７にチェーン等の連結部材が繋がれたボルト（図示せず）を螺合して上部部材２をクレーン等で吊り上げ、上部貫通孔１０にアンカー９を挿通した状態で下部部材３の上面３ａに上部部材２を設置する。このとき、上部部材２のボルト孔１３の位置が下部部材３のインサート２２の位置と一致するように設置する。そして、上部部材２のボルト孔１３にボルト１２を挿通して下部部材３のインサート２２に螺合することで上部部材２と下部部材３を一体化させて受圧板１を形成する。その後、アンカー９を仮緊張させて定着具３６により受圧板１をアンカー９に仮固定する。 Then, a bolt (not shown) having a connecting member such as a chain connected to the insert 14 on the side surface 5b of the fixing portion 5 of the upper member 2 or the insert 17 of the distal end surface 6a of the arm portion 6 is screwed to screw the upper member 2 Is lifted by a crane or the like, and the upper member 2 is installed on the upper surface 3a of the lower member 3 with the anchor 9 inserted in the upper through hole 10. At this time, the bolt holes 13 of the upper member 2 are installed so that the positions thereof match the positions of the inserts 22 of the lower member 3. Then, the bolt 12 is inserted into the bolt hole 13 of the upper member 2 and screwed into the insert 22 of the lower member 3 to integrate the upper member 2 and the lower member 3 to form the pressure receiving plate 1. After that, the anchor 9 is temporarily tensioned, and the pressure receiving plate 1 is temporarily fixed to the anchor 9 by the fixing tool 36.

次に、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８をゴムチューブ３３で塞ぐ。具体的には、図３−１及び図３−２に示すように、下部部材３の底面３ｂの外周縁と地盤斜面１０１との間に生じる隙間１８であって、地盤斜面１０１に設置された下部部材３の一番高い位置にある角部Ｆ付近以外の隙間１８を、円柱状の連続したゴムチューブ３３で塞いで設置する。こうすることで、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８に流し込んだ裏込め材であるモルタル１９等の流出を防止することができる。 Next, the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101 is closed with the rubber tube 33. Specifically, as shown in FIGS. 3A and 3B, the gap 18 formed between the outer peripheral edge of the bottom surface 3 b of the lower member 3 and the ground slope 101 is installed on the ground slope 101. The gap 18 other than the vicinity of the corner F at the highest position of the lower member 3 is installed by closing it with a columnar continuous rubber tube 33. By doing so, it is possible to prevent the outflow of the mortar 19 or the like, which is the backfill material, that has been poured into the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101.

そして、断面略Ｌ字状のアングル材３４のネジ孔３４ａにボルト３５を挿通しつつ上部部材２のインサート１７に螺合して、アングル材３４を上部部材２に固定する。このとき、アングル材３４によってゴムチューブ３３を上から押さえつけた状態となるようにアングル材３４を固定する。こうすることで、ゴムチューブ３３の位置のずれを防止することができるとともに、受圧板１自身がアンカー９を中心に回転して設置位置がずれるのを防止することができる。尚、このゴムチューブ３３の径は、下部部材３の底面３ｂの外周縁と地盤斜面１０１との間に生じる隙間１８の最大幅よりも大きいものを使用する。 Then, the angle member 34 is fixed to the upper member 2 by inserting the bolt 35 into the screw hole 34 a of the angle member 34 having a substantially L-shaped cross section and screwing it into the insert 17 of the upper member 2. At this time, the angle member 34 is fixed so that the rubber tube 33 is pressed from above by the angle member 34. By doing so, it is possible to prevent the displacement of the position of the rubber tube 33, and it is possible to prevent the pressure receiving plate 1 itself from rotating around the anchor 9 and shifting the installation position. The diameter of the rubber tube 33 is larger than the maximum width of the gap 18 formed between the outer peripheral edge of the bottom surface 3b of the lower member 3 and the ground slope 101.

そして、角部Ｆ付近の隙間１８から、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８が無くなるまで裏込め材であるモルタル１９等を流し込み、受圧板１と地盤斜面１０１を密着固定させ一体化させる。その後、モルタル１９等が所定の強度にまで固まったら、アングル材３４及びゴムチューブ３３を撤去し、最後にアンカー９を緊張させて、定着部５の凹部８において定着具３６により受圧板１をアンカー９に固定することで地盤斜面１０１に設置する。 Then, mortar 19 which is a back-filling material is poured from the gap 18 near the corner F until the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101 disappears, and the pressure receiving plate 1 and the ground slope 101 are brought into close contact with each other. Fix and integrate. After that, when the mortar 19 and the like harden to a predetermined strength, the angle member 34 and the rubber tube 33 are removed, and finally the anchor 9 is tensioned, and the pressure receiving plate 1 is anchored in the recess 8 of the fixing unit 5 by the fixing tool 36. It is fixed to 9 and installed on the ground slope 101.

上記施工により、受圧板１を設置する地盤斜面１０１に不陸がある場合であっても、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８に裏込め材であるモルタル１９等を施工して、下部部材３がその底面３ｂ側に裏込め材を有する構造とすることで、下部部材３の底面３ｂと地盤斜面１０１との接触面積が裏込め材（モルタル１９等）を介して大きくなるため、下部部材３への局部的な集中荷重を回避することができ、下部部材３にクラックや割れが生ずるのを防止することができる。 By the above-mentioned construction, even when the ground slope 101 on which the pressure receiving plate 1 is installed is uneven, a mortar 19 or the like as a backfill material is provided in the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101. By applying the structure in which the lower member 3 has a backfill material on the bottom surface 3b side, the contact area between the bottom surface 3b of the lower member 3 and the ground slope 101 is through the backfill material (mortar 19 or the like). Since it becomes large, it is possible to avoid a localized concentrated load on the lower member 3, and it is possible to prevent cracks or breaks from occurring in the lower member 3.

また、下部部材３の下部貫通孔２０に嵌め合わせ部材４の胴体部２６を挿入して、嵌め合わせ部材４の天板部２８と下部部材３の環状凹部２１とを嵌合させることで、図３−１等に示すように、胴体部２６の下端部が地盤斜面１０１の上に施工された裏込め材（モルタル１９等）と接する状態となる。 Further, by inserting the body portion 26 of the fitting member 4 into the lower through hole 20 of the lower member 3 and fitting the top plate portion 28 of the fitting member 4 and the annular recess 21 of the lower member 3 to each other, As shown in 3-1 etc., the lower end portion of the body portion 26 comes into contact with the backfill material (mortar 19 etc.) constructed on the ground slope 101.

一方、上記のように受圧板１の下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８に裏込め材であるモルタル１９等を流し込む方法により受圧板１を地盤斜面１０１に施工するのではなく、地盤斜面１０１にモルタル１９等の充填材を収容可能であって下部部材３の形状に合わせた袋部材３８を設置し、その上に受圧板１を設置する方法により受圧板１を地盤斜面１０１に施工してもよい。具体的には、図４に示すように、地盤斜面１０１の受圧板１を設置する位置に、下部部材３とほぼ同様な外形及び大きさであって中央にアンカー９を挿通するための孔が形成された袋部材３８を設置する。 On the other hand, as described above, the pressure receiving plate 1 is applied to the ground slope 101 by the method of pouring the mortar 19 or the like as the backfill material into the gap 18 between the bottom surface 3b of the lower member 3 of the pressure receiving plate 1 and the ground slope 101. Instead, the pressure receiving plate 1 is installed on the ground slope 101 by installing a bag member 38 capable of accommodating a filling material such as mortar 19 and adapted to the shape of the lower member 3, and installing the pressure receiving plate 1 thereon. You may construct on the slope 101. Specifically, as shown in FIG. 4, at the position where the pressure receiving plate 1 is installed on the ground slope 101, a hole having a shape and size similar to those of the lower member 3 and for inserting the anchor 9 in the center is formed. The formed bag member 38 is installed.

この袋部材３８は、通気性を有するがモルタル１９等の充填材は通さない変形自在な不織布等の部材で形成されている。また、内部に充填材を充填するための注入ノズル３８ａが、袋部材３８の複数箇所に設けられている。 The bag member 38 is formed of a member such as a deformable non-woven fabric that has air permeability but does not allow a filler such as the mortar 19 to pass through. Further, injection nozzles 38 a for filling the inside with the filling material are provided at a plurality of positions of the bag member 38.

袋部材３８の設置後、アンカー９が地盤斜面１０１の垂直方向に対して２０°以下の傾きを持つ場合であれば、上記施工方法の場合と同様にして下部部材３をクレーン等で吊り上げ、下部貫通孔２０にアンカー９を挿通しながら袋部材３８の上に設置する。このとき、下部貫通孔２０に挿通させたアンカー９を嵌め合わせ部材４の胴体部２６の開口部２６ａ内や天板部２８の切欠き部２８ａ内に挿通させながら、その胴体部２６を下部部材３の下部貫通孔２０に挿入し、天板部２８と下部部材３の環状凹部２１とを嵌合させることができる位置に下部部材３を吊り上げながら移動させ、既に設置してある袋部材３８の位置が下部部材３の真下にくるように調整し、その上に下部部材３を設置する。 After the bag member 38 is installed, if the anchor 9 has an inclination of 20 ° or less with respect to the vertical direction of the ground slope 101, the lower member 3 is lifted by a crane or the like in the same manner as in the above construction method. The anchor 9 is inserted into the through hole 20 and is installed on the bag member 38. At this time, while the anchor 9 inserted into the lower through hole 20 is inserted into the opening 26a of the body portion 26 of the fitting member 4 and the notch 28a of the top plate portion 28, the body portion 26 is inserted into the lower member. 3 is inserted into the lower through hole 20 and the lower member 3 is moved to a position where the top plate portion 28 and the annular recess 21 of the lower member 3 can be fitted, and the lower member 3 is moved. The position is adjusted so that it is directly below the lower member 3, and the lower member 3 is installed thereon.

そして、上記施工方法の場合と同様にして上部部材２をクレーン等で吊り上げ、上部部材２の上部貫通孔１０にアンカー９を挿通した状態で下部部材３の上面３ａに上部部材２を設置し、上部部材２のボルト孔１３にボルト１２を挿通して下部部材３のインサート２２に螺合することで上部部材２と下部部材３を一体化させて受圧板１を形成する。その後、アンカー９を仮緊張させて定着具３６により受圧板１をアンカー９に仮固定する。 Then, similarly to the case of the above-mentioned construction method, the upper member 2 is lifted by a crane or the like, and the upper member 2 is installed on the upper surface 3a of the lower member 3 with the anchor 9 inserted into the upper through hole 10 of the upper member 2, By inserting the bolt 12 into the bolt hole 13 of the upper member 2 and screwing the bolt 12 into the insert 22 of the lower member 3, the upper member 2 and the lower member 3 are integrated to form the pressure receiving plate 1. After that, the anchor 9 is temporarily tensioned, and the pressure receiving plate 1 is temporarily fixed to the anchor 9 by the fixing tool 36.

その後、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８をゴムチューブ３３で塞ぐ。具体的には、図４に示すように、下部部材３の底面３ｂの外周縁と地盤斜面１０１との間に生じる隙間１８であって、地盤斜面１０１に設置された下部部材３の一番高い位置にある角部Ｆ付近以外の隙間１８を、円柱状の連続したゴムチューブ３３で塞いで設置する（図３−２参照）。 Then, the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101 is closed with the rubber tube 33. Specifically, as shown in FIG. 4, the gap 18 is formed between the outer peripheral edge of the bottom surface 3b of the lower member 3 and the ground slope 101, and is the highest of the lower members 3 installed on the ground slope 101. The gap 18 other than the vicinity of the corner F located at the position is closed and installed with a columnar continuous rubber tube 33 (see FIG. 3-2).

具体的には、断面略Ｌ字状のアングル材３４のネジ孔３４ａにボルト３５を挿通しつつ上部部材２のインサート１７に螺合してアングル材３４を上部部材２に固定する。このとき、アングル材３４によってゴムチューブ３３を上から押さえつけた状態となるようにアングル材３４を固定することで、ゴムチューブ３３の位置のずれを防止することができるとともに、受圧板１自身がアンカー９を中心に回転して設置位置がずれるのを防止することができる。また、下部部材３の底面３ｂの外周縁から袋部材３８のはみ出しを防止することができる。 Specifically, the angle member 34 is fixed to the upper member 2 by inserting the bolt 35 into the screw hole 34a of the angle member 34 having a substantially L-shaped cross section and screwing the bolt 35 into the insert 17 of the upper member 2. At this time, by fixing the angle member 34 so that the rubber tube 33 is pressed from above by the angle member 34, the position shift of the rubber tube 33 can be prevented and the pressure receiving plate 1 itself is anchored. It is possible to prevent the installation position from being displaced by rotating around 9. Further, the bag member 38 can be prevented from protruding from the outer peripheral edge of the bottom surface 3b of the lower member 3.

尚、注入ノズル３８ａから袋部材３８の内部にモルタル１９等の充填剤を充填しやすいように、注入ノズル３８ａは下部部材３の角部Ｆ付近に位置させておく。 The injection nozzle 38a is placed near the corner F of the lower member 3 so that the filler such as the mortar 19 can be easily filled into the bag member 38 from the injection nozzle 38a.

そして、複数箇所の注入ノズル３８ａから袋部材３８の内部にモルタル１９等の充填材を充填し、受圧板１の下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８が無くなるまで袋部材３８を膨らませ、受圧板１と地盤斜面１０１とを密着させて一体化させる。 Then, a filling material such as mortar 19 is filled into the bag member 38 from a plurality of injection nozzles 38a until the gap 18 between the bottom surface 3b of the lower member 3 of the pressure receiving plate 1 and the ground slope 101 disappears. 38 is inflated and the pressure receiving plate 1 and the ground slope 101 are brought into close contact with each other to be integrated.

そして、モルタル１９等の充填材が所定の強度にまで固まったら、アングル材３４及びゴムチューブ３３を撤去し、最後にアンカー９を緊張させて、定着部５の凹部８において定着具３６により受圧板１をアンカー９に固定することで地盤斜面１０１に設置する。 Then, when the filling material such as the mortar 19 has hardened to a predetermined strength, the angle material 34 and the rubber tube 33 are removed, and finally the anchor 9 is tensioned, and the pressure receiving plate is fixed by the fixing tool 36 in the concave portion 8 of the fixing portion 5. It is installed on the ground slope 101 by fixing 1 to the anchor 9.

上記施工により、受圧板１を設置する地盤斜面１０１に不陸がある場合であっても、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８に不織布等の部材により形成された袋部材３８を設置して、下部部材３がその底面３ｂ側に袋部材３８を有する構造とすることで、下部部材３の底面３ｂと地盤斜面１０１との接触面積が袋部材３８を介して大きくなるため、下部部材３への局部的な集中荷重を回避することができ、下部部材３にクラックや割れが生ずるのを確実に防止することができる。 Even if the ground slope 101 on which the pressure receiving plate 1 is installed is uneven due to the above construction, a bag formed of a non-woven fabric or the like in the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101. By installing the member 38 and providing the lower member 3 with the bag member 38 on the bottom surface 3b side, the contact area between the bottom surface 3b of the lower member 3 and the ground slope 101 is increased through the bag member 38. Therefore, it is possible to avoid a localized concentrated load on the lower member 3, and it is possible to reliably prevent the lower member 3 from being cracked or broken.

また、図４に示すように、胴体部２６の下端部が地盤斜面１０１の上に施工された袋部材３８と接する状態となるため、下部部材３に大きさの大きな略円錐台形状の下部貫通孔２０を形成することにより下部部材３の支圧応力が低下しても、受圧板１をアンカー９に固定することによりアンカー９から下部部材３に伝わる緊張力（圧力）の一部を嵌め合わせ部材４によって支持することとなるため、下部部材３にクラックや割れが生じるのを防止することができる。 Further, as shown in FIG. 4, since the lower end of the body portion 26 comes into contact with the bag member 38 constructed on the ground slope 101, the lower member 3 has a large truncated cone-shaped lower portion penetrating therethrough. Even if the bearing stress of the lower member 3 is reduced by forming the hole 20, by fixing the pressure receiving plate 1 to the anchor 9, part of the tension force (pressure) transmitted from the anchor 9 to the lower member 3 is fitted. Since it is supported by the member 4, it is possible to prevent the lower member 3 from being cracked or broken.

また、袋部材３８によって、モルタル１９等の充填材が下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８から流出するのを確実に防止することができ、モルタル１９等の充填材の無駄を省くことができるため、受圧板１の設置コストを削減することができる。 Further, the bag member 38 can reliably prevent the filler such as the mortar 19 from flowing out of the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101, and the filler such as the mortar 19 and the like can be reliably prevented. Since the waste can be eliminated, the installation cost of the pressure receiving plate 1 can be reduced.

次に、他の実施例に係る受圧板３９の施工方法について説明する。尚、上記実施例で使用する部材と同じ部材については同じ符号を付して説明する。まず、上記実施例の場合と同様に、受圧板３９を設置する傾斜した地盤斜面１０１を削孔して削孔穴１０２を形成し、その削孔穴１０２内にアンカー９を挿入するとともにグラウト材（図示せず）を注入打設してアンカー９の一端を削孔穴１０２内に固着させる。そして、アンカー９の他端を地盤斜面１０１から露出させる。 Next, a method of constructing the pressure receiving plate 39 according to another embodiment will be described. The same members as those used in the above embodiment will be described with the same reference numerals. First, as in the case of the above-described embodiment, the sloped ground slope 101 on which the pressure receiving plate 39 is installed is drilled to form a drilled hole 102, and the anchor 9 is inserted into the drilled hole 102 and the grout material (Fig. (Not shown) is poured and fixed, and one end of the anchor 9 is fixed in the drilled hole 102. Then, the other end of the anchor 9 is exposed from the ground slope 101.

そして、上部部材２と下部部材３と嵌め合わせ部材２９をそれぞれトラック等により現場まで運び、上記実施例の場合と同様にして下部部材３をクレーン等で吊り上げ、下部貫通孔２０にアンカー９を挿通しながら地盤斜面１０１に設置する。 Then, the upper member 2, the lower member 3 and the fitting member 29 are respectively carried to the site by a truck or the like, and the lower member 3 is lifted by a crane or the like in the same manner as in the above embodiment, and the anchor 9 is inserted into the lower through hole 20. While installing it on the ground slope 101.

このとき、アンカー９が地盤斜面１０１に対して略垂直方向に延びる場合であれば、下部貫通孔２０に挿通させたアンカー９を嵌め合わせ部材２９に挿通させながら、その胴体部３０を下部部材３の下部貫通孔２０に挿入し、天板部３１と下部部材３の環状凹部２１とを嵌合させることができる位置、具体的にはアンカー９を嵌め合わせ部材２９における天板部３１の切欠き部３１ａの端部付近（天板部３１の中心付近）に挿通させながら嵌め合わせ部材２９の天板部３１と下部部材３の環状凹部２１とを嵌合させることができる位置に下部部材３を設置する。 At this time, if the anchor 9 extends in a direction substantially perpendicular to the ground slope 101, the body part 30 of the body part 30 is inserted while the anchor 9 inserted into the lower through hole 20 is inserted into the fitting member 29. At a position where the top plate portion 31 and the annular recess 21 of the lower member 3 can be fitted to each other, specifically, the anchor 9 is a notch of the top plate portion 31 in the fitting member 29. The lower member 3 is placed at a position where the top plate portion 31 of the fitting member 29 and the annular recess 21 of the lower member 3 can be fitted while being inserted near the end of the portion 31a (near the center of the top plate portion 31). Install.

一方、図８に示すように、アンカー９が地盤斜面１０１の垂直方向に対して２０°以下の傾きを持つ場合であれば、アンカー９を嵌め合わせ部材２９の胴体部３０の開口部３０ａ内や誘導部３２の開口部３２ａ内や天板部３１の切欠き部３１ａ内に挿通させながら嵌め合わせ部材２９の天板部３１と下部部材３の環状凹部２１とを嵌合させることができる位置に下部部材３を設置する。 On the other hand, as shown in FIG. 8, when the anchor 9 has an inclination of 20 ° or less with respect to the vertical direction of the ground slope 101, the anchor 9 is inserted in the opening 30a of the body portion 30 of the fitting member 29 or The top plate portion 31 of the fitting member 29 and the annular recess 21 of the lower member 3 can be fitted to each other while being inserted into the opening portion 32a of the guide portion 32 or the notch portion 31a of the top plate portion 31. The lower member 3 is installed.

尚、嵌め合わせ部材２９の胴体部３０を下部部材３の下部貫通孔２０に挿入するときは、アンカー９の地盤斜面１０１の垂直方向に対する傾き及びその方向に合わせて嵌め合わせ部材２９を水平方向に回転させて開口部３０ａ，３２ａや切欠き部３１ａの位置を調節し、アンカー９を開口部３０ａ，３２ａや切欠き部３１ａ内に挿通させながら胴体部３０を下部貫通孔２０に挿入する。 When the body portion 30 of the fitting member 29 is inserted into the lower through hole 20 of the lower member 3, the fitting member 29 is horizontally moved in accordance with the inclination of the ground slope 101 of the anchor 9 with respect to the vertical direction and the direction thereof. The body portion 30 is inserted into the lower through hole 20 while rotating to adjust the positions of the openings 30a and 32a and the cutout portion 31a and inserting the anchor 9 into the openings 30a and 32a and the cutout portion 31a.

そして、上記実施例の場合と同様にして上部部材２をクレーン等で吊り上げ、上部貫通孔１０にアンカー９を挿通した状態で下部部材３の上面３ａに上部部材２を設置する。このとき、上部部材２の上部貫通孔１０に嵌め合わせ部材２９の誘導部３２を挿入しながら、上部部材２のボルト孔１３の位置が下部部材３のインサート２２の位置と一致するように設置する。そして、上部部材２のボルト孔１３にボルト１２を挿通して下部部材３のインサート２２に螺合することで上部部材２と下部部材３を一体化させて受圧板３９を形成する。その後、アンカー９を仮緊張させて定着具３６により受圧板３９をアンカー９に仮固定する。 Then, similarly to the case of the above embodiment, the upper member 2 is lifted by a crane or the like, and the upper member 2 is installed on the upper surface 3a of the lower member 3 with the anchor 9 inserted in the upper through hole 10. At this time, the guide portion 32 of the fitting member 29 is inserted into the upper through hole 10 of the upper member 2 and is installed so that the position of the bolt hole 13 of the upper member 2 matches the position of the insert 22 of the lower member 3. .. Then, the bolt 12 is inserted into the bolt hole 13 of the upper member 2 and screwed into the insert 22 of the lower member 3 to integrate the upper member 2 and the lower member 3 to form the pressure receiving plate 39. After that, the anchor 9 is temporarily tensioned and the pressure receiving plate 39 is temporarily fixed to the anchor 9 by the fixing tool 36.

次に、上記実施例の場合と同様に、下部部材３の底面３ａと地盤斜面１０１との間の隙間１８をゴムチューブ３３で塞ぎつつその隙間１８に裏込め材であるモルタル１９等を流し込んで、受圧板３９と地盤斜面１０１を密着固定させて一体化させる。そして、ゴムチューブ３３を撤去した後、最後にアンカー９を緊張させて、定着部５の凹部８において定着具３６により受圧板３９をアンカー９に固定することで地盤斜面１０１に設置する。 Next, as in the case of the above-described embodiment, the gap 18 between the bottom surface 3a of the lower member 3 and the ground slope 101 is closed by the rubber tube 33, and a mortar 19 or the like as a backfill material is poured into the gap 18. , The pressure receiving plate 39 and the ground slope 101 are closely fixed and integrated. Then, after the rubber tube 33 is removed, the anchor 9 is finally tensioned, and the pressure receiving plate 39 is fixed to the anchor 9 by the fixing tool 36 in the concave portion 8 of the fixing portion 5 to be installed on the ground slope 101.

一方、上記袋部材３８を使用する場合には、上記実施例の場合と同様にして、受圧板３９の下部部材３を設置する地盤斜面１０１に受圧板３９の下部部材３の形状に合わせた袋部材３８を設置し、その上に受圧板３９を設置する。そして、アンカー９を仮緊張させて定着具３６により受圧板３９をアンカー９に仮固定する。 On the other hand, when the bag member 38 is used, as in the case of the above embodiment, the bag having the shape of the lower member 3 of the pressure receiving plate 39 on the ground slope 101 on which the lower member 3 of the pressure receiving plate 39 is installed. The member 38 is installed, and the pressure receiving plate 39 is installed thereon. Then, the anchor 9 is temporarily tensioned and the pressure receiving plate 39 is temporarily fixed to the anchor 9 by the fixing tool 36.

その後、上記実施例の場合と同様に、下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８をゴムチューブ３３で塞ぎ、複数箇所の注入ノズル３８ａから袋部材３８の内部にモルタル１９等の充填材を充填し、受圧板３９の下部部材３の底面３ｂと地盤斜面１０１との間の隙間１８がなくなるまで袋部材３８を膨らませ、受圧板３９と地盤斜面１０１とを密着させて一体化させる。 After that, as in the case of the above-described embodiment, the gap 18 between the bottom surface 3b of the lower member 3 and the ground slope 101 is closed with the rubber tube 33, and the mortar 19 and the like are injected from the plurality of injection nozzles 38a into the bag member 38. Is filled with the filling material, and the bag member 38 is inflated until the gap 18 between the bottom surface 3b of the lower member 3 of the pressure receiving plate 39 and the ground slope 101 disappears, and the pressure receiving plate 39 and the ground slope 101 are brought into close contact with each other to be integrated. Let

そして、モルタル１９等の充填材が所定の強度にまで固まったら、アングル材３４及びゴムチューブ３３を撤去し、最後にアンカー９を緊張させて、定着部５の凹部８において定着具３６により受圧板３９をアンカー９に固定することで地盤斜面１０１に設置する。 Then, when the filling material such as the mortar 19 has hardened to a predetermined strength, the angle material 34 and the rubber tube 33 are removed, and finally the anchor 9 is tensioned, and the pressure receiving plate is fixed by the fixing tool 36 in the concave portion 8 of the fixing portion 5. By fixing 39 to the anchor 9, it is installed on the ground slope 101.

上記の様にして地盤斜面１０１に受圧板１，３９を複数個設置した後は、図５に示すように、チェーン１５等の連結部材が繋がれたボルト２５を上部部材２や下部部材３に埋め込まれたインサート１７，２４に螺合することで、受圧板１，３９同士を連結する。こうすることで、受圧板１，３９を複数個設置した地盤斜面１０１において、一部の受圧板１，３９を固定していたアンカー９が地滑り等により切断されてしまった場合であっても、そのアンカー９の周囲に設置されチェーン１５等で連結された他の受圧板１，３９によって、切断されたアンカー９に固定されていた受圧板１，３９を支持することができるため、その受圧板１，３９の落下を防止することができる。 After installing a plurality of pressure receiving plates 1 and 39 on the ground slope 101 as described above, as shown in FIG. 5, the bolt 25 to which the connecting member such as the chain 15 is connected is attached to the upper member 2 and the lower member 3. The pressure receiving plates 1 and 39 are connected to each other by being screwed into the embedded inserts 17 and 24. By doing so, even in the case where the anchor 9 fixing a part of the pressure receiving plates 1 and 39 is cut by landslide or the like on the ground slope 101 on which a plurality of pressure receiving plates 1 and 39 are installed, Since the pressure receiving plates 1 and 39 fixed to the cut anchor 9 can be supported by the other pressure receiving plates 1 and 39 that are installed around the anchor 9 and connected by the chain 15 or the like, the pressure receiving plate is fixed. It is possible to prevent the fall of 1, 39.

１受圧板２８天板部
２上部部材２９嵌め合わせ部材
３下部部材３０胴体部
４嵌め合わせ部材３１天板部
５定着部３２誘導部
６アーム部３３ゴムチューブ
８凹部３４アングル材
９アンカー３５ボルト
１０上部貫通孔３６定着具
１１凹部３８袋部材
１２ボルト３９受圧板
１３ボルト孔１０１地盤斜面
１４インサート１０２削孔穴
１５チェーンＢ直径
１７インサートＣ長さ方向
１８隙間Ｄ直径
１９モルタルＥ長さ方向
２０下部貫通孔Ｆ角部
２１環状凹部
２２インサート
２３貫通孔
２４インサート
２５ボルト
２６胴体部 DESCRIPTION OF SYMBOLS 1 Pressure receiving plate 28 Top plate part 2 Upper member 29 Fitting member 3 Lower member 30 Body part 4 Fitting member 31 Top plate part 5 Fixing part 32 Guide part 6 Arm part 33 Rubber tube 8 Recessed part 34 Angle member 9 Anchor 35 Bolt 10 Upper through hole 36 Fixing tool 11 Recessed portion 38 Bag member 12 Bolt 39 Pressure receiving plate 13 Bolt hole 101 Ground slope 14 Insert 102 Drill hole 15 Chain B Diameter 17 Insert C Length direction 18 Gap D Diameter 19 Mortar E Length direction 20 Bottom penetration Hole F Corner 21 Annular recess 22 Insert 23 Through hole 24 Insert 25 Bolt 26 Body

Claims

An upper member having a fixing portion in which an upper through hole for inserting an anchor is formed in the center and an arm portion projecting in at least three directions from the fixing portion, and the lower member of the upper member can be combined and integrated. A plate-shaped body, a lower member having a lower through hole for inserting an anchor in the center, a substantially cylindrical body portion having an opening, and a cutout portion provided at an upper end of the body portion A fitting member made of a substantially circular top plate portion, the opening is formed from the upper end to the lower end of the body portion, and the cutout portion is formed from the outer peripheral edge of the top plate portion to the vicinity of the center. The fitting member is rotatable with respect to the lower member by inserting the body portion of the fitting member into the lower through hole of the lower member while communicating with the opening. A precast reinforced concrete pressure plate for ground anchors.

The fitting member has a substantially cylindrical guide portion having an opening on the top surface of the top plate portion, and the opening is formed from an upper end to a lower end of the guide portion, and the notch portion of the top plate portion. The precast reinforced concrete pressure receiving plate for the ground anchor according to claim 1, which is in communication with.

The precast reinforced concrete pressure receiving plate for a ground anchor according to claim 1 or 2, wherein the lower member has a backfill material or a bag member to be integrated with a ground slope.

The lower member is formed by being covered with a long fiber reinforced sheet, formed by sandwiching the long fiber reinforced sheet with concrete, formed of short fiber reinforced concrete, or made of high strength concrete. The precast reinforced concrete pressure receiving plate for a ground anchor according to any one of claims 1 to 3, which is formed or a combination thereof.

The precast reinforced concrete pressure receiving plate for a ground anchor according to any one of claims 1 to 4, wherein inserts are provided on a side surface of the upper member and a side surface of the lower member.