Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP3972365B2 - Concrete retaining wall blocks - Google Patents
[go: Go Back, main page]

JP3972365B2 - Concrete retaining wall blocks - Google Patents

Concrete retaining wall blocks Download PDF

Info

Publication number
JP3972365B2
JP3972365B2 JP2003332371A JP2003332371A JP3972365B2 JP 3972365 B2 JP3972365 B2 JP 3972365B2 JP 2003332371 A JP2003332371 A JP 2003332371A JP 2003332371 A JP2003332371 A JP 2003332371A JP 3972365 B2 JP3972365 B2 JP 3972365B2
Authority
JP
Japan
Prior art keywords
retaining wall
bottom plate
standing wall
steel
wall portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2003332371A
Other languages
Japanese (ja)
Other versions
JP2005097950A (en
Inventor
伴行 後藤
勝栄 岡村
Original Assignee
羽田コンクリート工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 羽田コンクリート工業株式会社 filed Critical 羽田コンクリート工業株式会社
Priority to JP2003332371A priority Critical patent/JP3972365B2/en
Publication of JP2005097950A publication Critical patent/JP2005097950A/en
Application granted granted Critical
Publication of JP3972365B2 publication Critical patent/JP3972365B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Retaining Walls (AREA)

Description

本発明は、底版部と、この底版部に立設する立壁部とを有するプレキャストコンクリート擁壁用ブロックに関する。   The present invention relates to a precast concrete retaining wall block having a bottom plate portion and a standing wall portion standing on the bottom plate portion.

従来、この種のものとして、縦壁と底壁とがL字状に連接されると共に、隣接する擁壁とボルト締結される控壁が少なくとも両端部に一体的に形成された擁壁(例えば特許文献1)や、立壁部と底版部を有する大型のL型擁壁ブロックで、前記底版部の上部と前記立壁部の後部とを連結する控壁とを有するもの(例えば特許文献2)などが知られている。   Conventionally, as this type, a vertical wall and a bottom wall are connected in an L shape, and a retaining wall (for example, a retaining wall to be bolted to an adjacent retaining wall is integrally formed at both ends) (for example, Patent Document 1), a large L-shaped retaining wall block having a standing wall portion and a bottom plate portion, and having a retaining wall connecting the upper portion of the bottom plate portion and the rear portion of the standing wall portion (for example, Patent Document 2) It has been known.

また、大型の擁壁では、基盤上に設置される前部支持板と、基盤上に設置される後部支持板と、この後部支持板に回動可能に載置される脚部を控壁板部の工法下端部に突設した擁壁ブロックとを備えた組立式擁壁(例えば特許文献3)があり、また、分割されたコンクリート部材同士をPC鋼材で連結して緊張一体化することも知られている。
特開昭62−288221号公報 特開昭58−218523号公報 実開平3−86142号公報
Further, in a large retaining wall, a front support plate installed on the base, a rear support plate installed on the base, and a leg portion rotatably mounted on the rear support plate There is an assembly-type retaining wall (for example, Patent Document 3) provided with a retaining wall block protruding at the lower end of the construction method of the part, and the divided concrete members may be connected with PC steel to be integrated with tension. Are known.
Japanese Patent Laid-Open No. 62-288221 JP 58-218523 A Japanese Utility Model Publication No. 3-86142

上記のような従来の擁壁では、控壁により立壁部を補強して薄型化を図っていたが、立壁部には背面土圧が加わるため、薄型化にも限度があり、また、控壁の分だけ重量が嵩むと共に、形状が複雑になる面がある。   In the conventional retaining wall as described above, the standing wall portion was reinforced by the retaining wall to reduce the thickness, but since the back wall earth pressure is applied to the standing wall portion, there is a limit to the reduction in thickness. In addition to increasing the weight, there are some aspects that make the shape complicated.

一方、組立式擁壁においては、部材をPC鋼材で連結して緊張一体化すれば強度が向上して薄型軽量化を図ることができるが、現場で組み立てる構造であるから、部材にPC鋼材を挿通する孔や定着箇所などを形成する必要があるため、製品構造が複雑となり、また、現場で分割された部材同士の孔を位置合わせすると共に、その孔にPC鋼材を挿通した後、緊張するという作業を要するため、現場の施工が煩雑となる面がある。   On the other hand, in an assembly-type retaining wall, strength can be improved and thinning and weight reduction can be achieved by connecting the members with PC steel and integrating them with tension. However, since the structure is assembled on site, PC steel is used for the members. Since it is necessary to form a hole to be inserted and a fixing part, the product structure becomes complicated. In addition, the holes of the members divided in the field are aligned, and the PC steel material is inserted into the hole, and then the tension is applied. Therefore, there is a problem that the construction at the site becomes complicated.

そこで、本発明は、立壁部の薄型化し、軽量化が可能なコンクリート擁壁用ブロックを提供することを目的とする。   Then, an object of this invention is to provide the block for concrete retaining walls which can make a standing wall part thin and can be reduced in weight.

請求項1の発明は、底版部と、この底版部に立設され背面土圧を受ける立壁部とを有し、前記底版部と立壁部とを一体に形成し、前記立壁部に縦方向のPC鋼材を挿通し、このPC鋼材により前記立壁部に緊張力を付与しコンクリート擁壁用ブロックにおいて、前記立壁部は、その後部と前記底版部の上部とを連結する控壁部を一体に備え、この控壁部が前記PC鋼材に対応して設けられ、前記控壁部は、前後方向の厚さがほぼ一定のリブ状をなし、前記立壁部の高さ方向略中央から下部に連続して形成され、前記立壁部の上部は一定厚さの平板状に形成され、前記控壁部の間に前側に凹んだ凹部が形成されて前記立壁部の上部より薄肉の薄肉部が形成され、前記底版部には前記控壁部に連続する突条部が形成され、前記突条部の間には凹部が形成されているものである。 The invention of claim 1 includes a bottom plate portion, possess a vertical wall portion for receiving the rear earth pressure is erected on the bottom plate portion, to form and said bottom plate portion and a vertical wall portion integrally in the vertical direction on the vertical wall In the concrete retaining wall block in which the PC steel material is inserted and tension is applied to the standing wall portion by the PC steel material, the standing wall portion integrally connects the rear wall portion and the upper portion of the bottom plate portion. The retaining wall portion is provided corresponding to the PC steel material, and the retaining wall portion is formed in a rib shape with a substantially constant thickness in the front-rear direction, and is continuous from the substantially center in the height direction of the standing wall portion to the lower portion. The upper portion of the standing wall portion is formed in a flat plate shape with a constant thickness, and a recessed portion recessed in the front side is formed between the retaining wall portions, so that a thin portion thinner than the upper portion of the standing wall portion is formed. The bottom plate portion is formed with a ridge portion that is continuous with the retaining wall portion, and a concave portion is formed between the ridge portions. In which There are formed.

請求項の発明は、前記PC鋼材の上定着部を前記立壁部に固定し、前記PC鋼材の下定着部をブロックの下面に開口する凹部に配置したものである。 According to a second aspect of the present invention, the upper fixing portion of the PC steel material is fixed to the standing wall portion, and the lower fixing portion of the PC steel material is disposed in a recess opening in the lower surface of the block.

請求項の発明は、アンボンド式の前記PC鋼材の上定着部を前記立壁部に埋設し、前記下面に開口する凹部は前記底版部の上面より下方に位置するものである。 According to a third aspect of the present invention, the upper fixing portion of the unbonded PC steel material is embedded in the standing wall portion, and the recess opening in the lower surface is located below the upper surface of the bottom plate portion.

請求項の発明は、前記縦方向のPC鋼材により、前記立壁部の上部と下部とを連結したものである。 According to a fourth aspect of the present invention, the upper portion and the lower portion of the standing wall portion are connected by the PC steel material in the longitudinal direction.

請求項の発明は、前記底版部に幅方向のPC鋼材を挿通し、このPC鋼材により前記底版部に緊張力を付与したものである。 According to a fifth aspect of the present invention, a PC steel material in the width direction is inserted into the bottom plate portion, and tension is applied to the bottom plate portion by the PC steel material.

請求項1の構成によれば、PC鋼材により立壁部の引張領域に緊張力を付与できるから、背面土圧により立壁部の背面側に生じる引張力にPC鋼材が対抗することにより、断面性能が向上し、立壁部の薄型化が可能となる。   According to the configuration of claim 1, since tension can be imparted to the tensile region of the standing wall portion by the PC steel material, the cross-sectional performance is improved by the PC steel material countering the tensile force generated on the back side of the standing wall portion by the back earth pressure. This improves the thickness of the standing wall.

請求項の構成によれば、控壁部により立壁部の引張領域側の引張強度が向上すると共に、PC鋼材を背面側に位置して配置することができるから、背面土圧により生じる内部の引張力に対してPC鋼材の緊張力が有効に作用する。 According to the structure of Claim 1 , since the tensile strength by the side of the tension | pulling area | region of a standing wall part improves by a retaining wall part, since PC steel material can be located and arrange | positioned on the back side, the inside produced by back earth pressure The tension of PC steel works effectively against the tensile force.

請求項の構成によれば、立壁部の下部側までPC鋼材により連続した緊張力を付与することができ、また、定着作業も容易となる。 According to the structure of Claim 2 , the tension | tensile_strength continuous by PC steel material can be provided to the lower part side of a standing wall part, and fixing work also becomes easy.

請求項の構成によれば、製作時にコンクリートが硬化したら、PC鋼材の下端を引張って下面に開口する凹部に定着することにより緊張力を付与することができ、PC鋼材に係わるブロックの加工が簡易で、緊張力を付与する作業も比較的容易となる。また、凹部は前記底版部の上面より下方に位置するから、底版部から突出した立壁部の下部から連続してPC鋼材により緊張力を付与することができる。 According to the third aspect, after the concrete is cured during fabrication, to pull the lower end of the PC steel can give tension by fixing in a recess open to the underside, the processing of blocks according to the PC steel material It is simple and the work of applying tension is relatively easy. Moreover, since a recessed part is located below the upper surface of the said bottom plate part, tension | tensile_strength can be provided with PC steel materials continuously from the lower part of the standing wall part which protruded from the bottom plate part.

請求項の構成によれば、分割した上部と下部とを現場でPC鋼材により連結することにより、工場製作時の立壁部の寸法を抑えることができ、運搬据付が容易となる。 According to the configuration of the fourth aspect , by connecting the divided upper part and lower part with the PC steel material at the site, the dimensions of the standing wall part at the time of factory production can be suppressed, and the transportation installation becomes easy.

請求項の構成によれば、PC鋼材により底版部の強度を向上することができる。また、底版部をプレキャストコンクリートブロックで構成する場合は、それらブロックをPC鋼材で連結することができ、また、底版部をブロックと現場打ちコンクリートにより構成する場合は、ブロックと現場うちコンクリートとを一体化できる。 According to the structure of Claim 5 , the intensity | strength of a bottom plate part can be improved with PC steel materials. In addition, when the bottom slab is composed of precast concrete blocks, these blocks can be connected with PC steel, and when the bottom slab is composed of blocks and cast-in-place concrete, the block and the concrete out of the field are integrated. Can be

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な構成を採用することにより、従来にない機能を付加したコンクリート擁壁用ブロックが得られ、そのコンクリート擁壁用ブロックについて記述する。   Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new configuration different from the conventional one, a concrete retaining wall block having an unprecedented function is obtained, and the concrete retaining wall block will be described.

以下、本発明の実施例を添付図面を参照して説明する。図1〜図5は本発明の第1実施例を示し、同図に示すように、コンクリート擁壁用ブロック1は、底版部2と、この底版部2に立設される立壁部3と、この立壁部3の背面である後部と前記底版部2の上部とを連結する控壁部4とを一体に有する。尚、ブロック1は図示しない鉄筋を埋設した鉄筋コンクリートである。また、控壁部4は立壁部3の一部である。   Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of the present invention. As shown in FIG. 1, the concrete retaining wall block 1 includes a bottom plate portion 2, a standing wall portion 3 erected on the bottom plate portion 2, and The rear wall, which is the back surface of the standing wall 3, and the retaining wall 4 that connects the upper part of the bottom slab 2 are integrally provided. The block 1 is reinforced concrete in which a reinforcing bar (not shown) is embedded. The retaining wall 4 is a part of the standing wall 3.

前記控壁部4は、前後方向の厚さがほぼ一定のリブ状をなし、壁部3の高さ方向略中央から下部に連続して形成され、その上部には傾斜部4Aが形成されている。また、控壁部4は立壁部3の幅方向両側及び中央にそれぞれ設けられ、中央の立壁部3は左右の立壁部3の略2倍の幅を有する。 The Hikaekabe unit 4, without the thickness of the longitudinal direction a substantially constant rib is formed continuously to the lower the height direction substantial center of the upright wall portion 3, the inclined portion 4A is formed at the upper portion ing. Further, the retaining wall portion 4 is provided on both sides and the center of the standing wall portion 3 in the width direction, and the central standing wall portion 3 has a width approximately twice that of the left and right standing wall portions 3.

前記立壁部3の上部31は一定厚さの平板状に形成され、前記控壁部4の傾斜部41より下方の下部には、前側に凹んだ凹部32が形成されて上部31より薄肉の薄肉部33が形成されている。   The upper portion 31 of the standing wall portion 3 is formed in a flat plate shape having a constant thickness, and a concave portion 32 is formed in the lower portion below the inclined portion 41 of the retaining wall portion 4 so as to be thinner than the upper portion 31. A portion 33 is formed.

また、前記底版部2には前記控壁部4に連続する突条部21が形成され、この突条部21の上面が底版部2の上面22であり、突条部21,21の間には凹部23が形成されている。   Further, the bottom plate portion 2 is formed with a ridge portion 21 that is continuous with the retaining wall portion 4, and the upper surface of the ridge portion 21 is the upper surface 22 of the bottom plate portion 2, and between the ridge portions 21, 21. A recess 23 is formed.

前記立壁部3には、高さのほぼ2分の1より下部に、PC鋼材たるアンボンドPC鋼棒51が挿通され、このPC鋼棒51は左右の控壁部4,4位置にそれぞれ1本、中央の控壁部4位置に2本配置されている。そして、PC鋼棒51は立壁部3が背面土圧を受けた状態でその断面において引張力を受ける引張領域側に配置されている。前記PC鋼棒51の上端は上定着部52により立壁部3に埋設固定され、その上定着部52はナット52Aと2枚の定着板52Bにより構成され、そのナット52AはPC鋼棒51に螺着され、前記定着板52BはPC鋼棒51に固着されている。   An unbonded PC steel bar 51, which is a PC steel material, is inserted into the standing wall part 3 below the half of the height, and one PC steel bar 51 is placed at each of the left and right retaining wall parts 4 and 4 respectively. Two are disposed at the central retaining wall 4 position. And the PC steel bar 51 is arrange | positioned in the tension | pulling area | region side which receives a tensile force in the cross section in the state in which the standing wall part 3 received back surface earth pressure. The upper end of the PC steel bar 51 is embedded and fixed in the standing wall part 3 by an upper fixing part 52. The upper fixing part 52 is constituted by a nut 52A and two fixing plates 52B, and the nut 52A is screwed to the PC steel bar 51. The fixing plate 52B is fixed to the PC steel bar 51.

また、前記上定着部52の下方で、ブロック1の下面には、下面が開口する凹部53を形成し、この凹部53の上端面53Aは前記底版部2の上面22より下方に形成されている。そして、この例では、前記上端面53Aは凹部23の上面より下方に位置する。前記PC鋼棒51の下端は前記凹部53に収納され、PC鋼棒51の下端を外側に引張って緊張した状態で、該下端を定着具54により前記凹部53に定着することにより、PC鋼棒51に緊張力が付与される。尚、前記定着具54が下定着部である。また、図中55はブロック1に埋設した板材であり、前記PC鋼棒51が遊挿されている。   In addition, a concave portion 53 whose lower surface is opened is formed on the lower surface of the block 1 below the upper fixing portion 52, and an upper end surface 53A of the concave portion 53 is formed below the upper surface 22 of the bottom plate portion 2. . In this example, the upper end surface 53A is located below the upper surface of the recess 23. The lower end of the PC steel bar 51 is housed in the recess 53, and the lower end of the PC steel bar 51 is tensioned by pulling the lower end outward. 51 is given tension. The fixing tool 54 is a lower fixing unit. In the figure, reference numeral 55 denotes a plate material embedded in the block 1, and the PC steel rod 51 is loosely inserted therein.

また、前記立壁部3の下部側の薄肉部33には前後方向に貫通する排水孔61が穿設されており、この排水孔61の背面にはスクリーンネット62が設けられる。   Further, a drainage hole 61 penetrating in the front-rear direction is formed in the thin portion 33 on the lower side of the standing wall 3, and a screen net 62 is provided on the back surface of the drainage hole 61.

次に、前記ブロック1の作用効果につき、製造例及び施工例を合わせて説明すると、工場でブロック1の型枠内にPC鋼棒51を配置した状態で、コンクリートを充填・養生した後、好ましくは工場において、PC鋼棒51の下端を引張って緊張した状態で定着具54により定着することにより、立壁部3の引張領域側に緊張力を付与する。このように工場で緊張力を付与することにより、ばらつきのない均一な緊張力を付与することができ、製品の品質も安定する。   Next, the operational effects of the block 1 will be described together with the production example and the construction example. After filling and curing the concrete with the PC steel bar 51 placed in the form of the block 1 at the factory, In a factory, tension is applied to the tension region side of the standing wall portion 3 by fixing the lower end of the PC steel bar 51 with the fixing tool 54 in a tensioned state. By applying tension in the factory in this way, uniform tension without variation can be applied, and the quality of the product is also stabilized.

そして、現場において、基礎を形成し、この基礎は、捨石などの基礎材を敷き均して基礎材層71を形成し、この基礎材層71の上に現場打ちにより基礎コンクリート層72を形成し、この基礎コンクリート層72の上に敷きモルタル層73を設けて該敷きモルタル層73の上面を平坦に形成してなり、その上にブロック1,1…を左右方向に並べ、必要に応じて、左右方向の隣り合うブロック1,1…を連結し、ブロック1の背面側に、土砂などの裏込め材74を充填し、この裏込め材74の上面を立壁部3の上端とほぼ合わせ、該裏込め材74の上面に舗装層75を設ける。尚、図中76は立壁部3の背面に沿って設けた排水層76であり、透水性を有する。また、図中77は立壁部3の上端に立設した手摺である。   Then, a foundation is formed at the site, and the foundation is laid with a foundation material such as rubble to form a foundation material layer 71, and a foundation concrete layer 72 is formed on the foundation material layer 71 by on-site casting. The mortar layer 73 is laid on the basic concrete layer 72 and the upper surface of the mortar layer 73 is formed flat, and the blocks 1, 1... The adjacent blocks 1, 1... In the left-right direction are connected, and the back side of the block 1 is filled with a backfill material 74 such as earth and sand, and the upper surface of the backfill material 74 is substantially aligned with the upper end of the upright wall portion 3, A pavement layer 75 is provided on the upper surface of the backfill material 74. In the figure, 76 is a drainage layer 76 provided along the back surface of the upright wall portion 3 and has water permeability. In the figure, reference numeral 77 denotes a handrail erected on the upper end of the standing wall 3.

このように施工した擁壁において、ブロック1の立壁部3には、裏込め材74などにより背面土圧が加わり、立壁部3を前側に倒そうとする力が加わり、立壁部3の断面背面側に引張力が加わり、引張領域となる。そこで、その引張力に対して、緊張力を付与したPC鋼棒51が対抗するため、立壁部3の強度を確保することができる。したがって、立壁部3の上部31は一定厚さの平板状に形成することができ、控壁部4を設けた下部側は薄肉部33を設けることができ、ブロック1の軽量化が可能となる。また、立壁部3の上部31は一定厚さの平板状に形成するから、図5に示すように、現場に合わせて、立壁部3の上部を斜めに切断し、舗装層75に勾配を設けることもできる。   In the retaining wall thus constructed, the back wall earth pressure is applied to the upright wall portion 3 of the block 1 by the backfilling material 74 and the like, and a force to tilt the upright wall portion 3 forward is applied. Tensile force is applied to the side to become a tensile region. Therefore, the strength of the standing wall portion 3 can be ensured because the PC steel bar 51 imparted with the tension force opposes the tensile force. Therefore, the upper part 31 of the standing wall part 3 can be formed in a flat plate shape with a constant thickness, and the lower part side provided with the retaining wall part 4 can be provided with the thin part 33, and the weight of the block 1 can be reduced. . Moreover, since the upper part 31 of the standing wall part 3 is formed in a flat plate shape with a constant thickness, as shown in FIG. 5, the upper part of the standing wall part 3 is cut obliquely to provide a gradient in the pavement layer 75 according to the site. You can also.

このように本実施形態では、請求項1に対応して、底版部2と、この底版部2に立設され背面土圧を受ける立壁部3とを有し、底版部2と立壁部3とを一体に形成し、立壁部3の引張領域側に縦方向のPC鋼材たるPC鋼棒51を挿通し、このPC鋼棒51により立壁部3に緊張力を付与したコンクリート擁壁用ブロックにおいて、立壁部3は、その後部と底版部2の上部とを連結する控壁部4を一体に備え、この控壁部4がPC鋼棒51に対応して設けられ、控壁部4は、前後方向の厚さがほぼ一定のリブ状をなし、立壁部3の高さ方向略中央から下部に連続して形成され、立壁部3の上部31は一定厚さの平板状に形成され、控壁部4,4の間に前側に凹んだ凹部32が形成されて立壁部3の上部より薄肉の薄肉部33が形成され、底版部2には控壁部4に連続する突条部21が形成され、突条部21,21の間には凹部23が形成されているから、背面土圧により立壁部3の背面側に生じる引張力にPC鋼棒51が対抗することにより、断面性能が向上し、立壁部3の薄型化が可能となる。 As described above, in this embodiment, corresponding to claim 1, a bottom plate portion 2, have a standing wall 3 which receives the rear earth pressure is erected on the bottom plate portion 2, a bottom plate portion 2 and the vertical wall portion 3 In a concrete retaining wall block in which a PC steel rod 51 which is a PC steel material in the vertical direction is inserted into the tension region side of the standing wall portion 3 and tension is applied to the standing wall portion 3 by the PC steel rod 51, The standing wall portion 3 is integrally provided with a retaining wall portion 4 that connects the rear portion and the upper portion of the bottom plate portion 2, and this retaining wall portion 4 is provided corresponding to the PC steel rod 51. A rib having a substantially constant thickness is formed continuously from the center of the upright wall portion 3 to the lower portion, and the upper portion 31 of the upright wall portion 3 is formed in a flat plate shape having a constant thickness. A concave portion 32 that is recessed forward is formed between the portions 4 and 4, and a thin portion 33 that is thinner than the upper portion of the standing wall portion 3 is formed. Protrusions 21 consecutive is formed, since the recess 23 between the ridges 21, 21 are formed, against the PC steel bars 51 to the pulling force caused by the back earth pressure on the back side of the vertical wall portion 3 By doing so, the cross-sectional performance is improved, and the standing wall portion 3 can be thinned.

また、このように本実施形態では、請求項に対応して、控壁部4により立壁部3の引張領域側の引張強度が向上すると共に、PC鋼棒51を背面側に位置して配置することができるから、背面土圧により生じる内部の引張力に対してPC鋼棒51の緊張力が有効に作用する。 Also, in this way, in the present embodiment, corresponding to claim 1, together with the tensile strength of the tensile region side of the vertical wall portion 3 can be improved by buttresses unit 4, located a PC steel bar 51 on the back side arrangement Therefore, the tension force of the PC steel bar 51 effectively acts on the internal tensile force generated by the earth pressure on the back surface.

また、このように本実施形態では、請求項に対応して、PC鋼材たるPC鋼棒51の上定着部52を立壁部3に固定し、PC鋼棒51の下定着部たる定着具54をブロック1の下面に開口する凹部53に配置したから、立壁部3の下部側までPC鋼棒51により連続した緊張力を付与することができ、また、定着作業も容易となる。 In this way, in this embodiment, corresponding to claim 2 , the upper fixing portion 52 of the PC steel rod 51 as the PC steel material is fixed to the standing wall portion 3, and the fixing tool 54 as the lower fixing portion of the PC steel rod 51 is fixed. Is disposed in the concave portion 53 opened on the lower surface of the block 1, a continuous tension force can be applied to the lower side of the standing wall portion 3 by the PC steel rod 51, and fixing work is facilitated.

また、このように本実施形態では、請求項に対応して、アンボンド式のPC鋼材たるアンボンドPC鋼棒51の上定着部52を立壁部3に埋設し、下面に開口する凹部53は底版部2の上面22より下方に位置するから、製作時にコンクリートが硬化したら、PC鋼棒51の下端を引張って凹部53に定着することにより、緊張力を付与することができ、PC鋼棒51に係わるブロック1の加工が簡易で、緊張力を付与する作業も比較的容易となる。また、凹部53は底版部2の上面22より下方に位置するから、底版部2から突出した立壁部3の下部から連続してPC鋼棒51により緊張力を付与することができる。 In this way, in this embodiment, corresponding to claim 3 , the upper fixing portion 52 of the unbonded PC steel rod 51, which is an unbonded PC steel material, is embedded in the standing wall portion 3, and the concave portion 53 opened on the lower surface has the bottom plate. Since it is located below the upper surface 22 of the part 2, when the concrete is hardened at the time of manufacture, tension can be applied by pulling the lower end of the PC steel bar 51 and fixing it to the recess 53. The processing of the related block 1 is simple, and the work of applying tension is relatively easy. Further, since the concave portion 53 is positioned below the upper surface 22 of the bottom plate portion 2, tension can be applied by the PC steel bar 51 continuously from the lower portion of the standing wall portion 3 protruding from the bottom plate portion 2.

また、立壁部3は控壁部4より上方が平板状に形成されているから、立壁部3の上部31を切断しても、切断端の厚さは均一となり、擁壁上部が擁壁長さ方向に傾斜する場合でも対応が容易となる。また、立壁部3の下部で、控壁部4,4の間に薄肉部33を形成することにより、一層の軽量化を図ることができる。 Further, since the standing wall portion 3 above the Hikaekabe portion 4 is formed in a flat plate shape, even if cutting the top 31 of the vertical wall 3, the thickness of the cutting edge becomes uniform, the retaining wall upper retaining wall Even when it is inclined in the length direction, it is easy to cope with it. Further, by forming the thin portion 33 between the retaining wall portions 4 and 4 at the lower portion of the standing wall portion 3, further weight reduction can be achieved.

図6は本発明の第2実施例を示し、上記第1実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、この例では、立壁部3は、上部3Aと下部3Bに分割され、また、底版部2は、前部2Aと後部2Bに分割されている。前記上部3Aはプレキャストコンクリート製であり、前記下部3Bと底版部2の前部2Aとを一体のプレキャストコンクリート製としたブロック1であり、前記後部2Bは、プレキャストコンクリートブロックは現場打ちコンクリートにより形成され、前記前部2Aと後部2BとをPC鋼材たるアンボンドPC鋼棒51により緊張一体化している。尚、図中61は、PC鋼棒61の定着部である。   FIG. 6 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof is omitted. In this example, the standing wall portion 3 is an upper portion. The bottom plate portion 2 is divided into a front portion 2A and a rear portion 2B. The upper part 3A is made of precast concrete, the lower part 3B and the front part 2A of the bottom slab part 2 are made of a precast concrete block 1, and the rear part 2B is made of cast concrete. The front portion 2A and the rear portion 2B are tension-integrated by an unbonded PC steel rod 51 which is a PC steel material. In the figure, reference numeral 61 denotes a fixing portion of the PC steel bar 61.

このように本実施例では、請求項1〜に対応して、上記第1実施例と同様の作用・効果を奏する。 As described above, in this embodiment, the same operations and effects as those in the first embodiment are obtained in correspondence with claims 1 to 3 .

また、このように本実施例では、請求項に対応して、縦方向のPC鋼材たるPC鋼棒51により、立壁部3の上部3Aと下部3Bとを連結したものであり、分割した上部3Aと下部3Bとを現場でPC鋼棒51により連結することにより、工場製作時の立壁部の寸法を抑えることができ、運搬据付が容易となる。 In this way, in this embodiment, in correspondence with claim 4 , the upper part 3A and the lower part 3B of the upright wall part 3 are connected by the PC steel bar 51 which is the PC steel material in the vertical direction, and the upper part is divided. By connecting the 3A and the lower part 3B with the PC steel bar 51 at the site, the dimensions of the standing wall at the time of factory production can be suppressed, and the transportation installation becomes easy.

また、このように本実施例では、請求項に対応して、底版部3に幅方向のPC鋼材たるPC鋼棒61を挿通し、このPC鋼棒61により底版部2に緊張力を付与したから、PC鋼棒61により底版部3の強度を向上することができる。また、底版部2をプレキャストコンクリートブロックである前部2Aで構成する場合は、それらブロックをPC鋼棒61で連結することができ、また、底版部2をブロックである前部2Aと現場打ちコンクリートにより構成する場合は、前部2Aと現場うちコンクリートとを一体化することができる。 In this way, in this embodiment, corresponding to claim 5 , the PC steel rod 61, which is the PC steel material in the width direction, is inserted into the bottom plate portion 3, and tension is applied to the bottom plate portion 2 by the PC steel rod 61. Therefore, the strength of the bottom plate portion 3 can be improved by the PC steel rod 61. Further, when the bottom slab part 2 is constituted by the front part 2A which is a precast concrete block, these blocks can be connected by the PC steel rod 61, and the bottom slab part 2 and the front part 2A which is the block and the cast-in-place concrete. When comprised by this, the front part 2A and the concrete out of the field can be integrated.

尚、本発明は上記各実施例に限定されるものではなく、本発明の要旨の範囲内において、種々の変形実施が可能である。例えば、PC鋼材はPC鋼棒以外でも、PC鋼線など各種のものを用いることができる。また、実施形態では、ポストテンション方式で緊張力を付与する例を示したが、工場製作時にプレテンション方式によりPC鋼材に緊張力を付与するようにしてもよい。さらに、実施形態では、L型擁壁を例に説明したが、前側に底版部の一部が突出する逆T型のものでもよい。また、控壁部に挿通するPC鋼材は、実施例に限定されず、1本でも2本でも3本以上でもよい。 The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, PC steel materials other than PC steel bars can be used such as PC steel wires. In the embodiment, an example in which tension is applied by the post-tension method has been described. However, tension may be applied to the PC steel by a pre-tension method at the time of factory production. Furthermore, although the L-shaped retaining wall has been described as an example in the embodiment, an inverted T-shaped one in which a part of the bottom plate portion protrudes to the front side may be used. Further, the PC steel material inserted through the retaining wall portion is not limited to the embodiment, and may be one, two, or three or more.

本発明の第1実施例を示す一部を断面にした擁壁の側面図である。It is a side view of the retaining wall which made the cross section a part which shows 1st Example of this invention. 同上、底版部を断面にしたブロックの背面図である。It is a rear view of the block which made the bottom plate part the cross section same as the above. 同上、要部の断面図である。It is sectional drawing of the principal part same as the above. 同上、擁壁の一部切り欠き斜視図である。It is a partially cutaway perspective view of a retaining wall. 同上、ブロックの立壁部の上部を斜めに形成した擁壁の一部切り欠き斜視図である。It is a partially notched perspective view of the retaining wall which formed the upper part of the standing wall part of a block diagonally. 本発明の第2実施例を示す一部を断面にした擁壁の側面図である。It is a side view of the retaining wall which made the cross section a part which shows 2nd Example of this invention.

符号の説明Explanation of symbols

1 ブロック
2 底版部
2A 上部
2B 下部
22 上面
3 立壁部
3A 前部
3B 後部
4 控壁部
21 突条部
23 凹部
31 立壁部の上部
32 凹部
33 薄肉部
51 アンボンドPC鋼棒(PC鋼材)
52 上定着部
54 定着具(下定着部)
61 アンボンドPC鋼棒(PC鋼材)
1 Block 2 Bottom plate part 2A Upper part 2B Lower part
22 Upper surface 3 Standing wall 3A Front 3B Rear 4 Retaining wall
21 ridge
23 recess
31 Upper part of standing wall
32 recess
33 Thin section
51 Unbonded PC steel bar (PC steel)
52 Upper fixing part
54 Fixing tool (lower fixing part)
61 Unbonded PC steel bar (PC steel)

Claims (5)

底版部と、この底版部に立設され背面土圧を受ける立壁部とを有し、前記底版部と立壁部とを一体に形成し、前記立壁部に縦方向のPC鋼材を挿通し、このPC鋼材により前記立壁部に緊張力を付与しコンクリート擁壁用ブロックにおいて、
前記立壁部は、その後部と前記底版部の上部とを連結する控壁部を一体に備え、この控壁部が前記PC鋼材に対応して設けられ、
前記控壁部は、前後方向の厚さがほぼ一定のリブ状をなし、前記立壁部の高さ方向略中央から下部に連続して形成され、
前記立壁部の上部は一定厚さの平板状に形成され、前記控壁部の間に前側に凹んだ凹部が形成されて前記立壁部の上部より薄肉の薄肉部が形成され、
前記底版部には前記控壁部に連続する突条部が形成され、前記突条部の間には凹部が形成されていることを特徴とするコンクリート擁壁用ブロック。
Possess a bottom plate portion, and a vertical wall portion for receiving the rear earth pressure is erected on the bottom plate portion, and said bottom plate portion and a vertical wall portion formed integrally, inserted through the longitudinal PC steel on the vertical wall, this In the concrete retaining wall block in which tension is applied to the standing wall by PC steel,
The standing wall portion is integrally provided with a retaining wall portion that connects the rear portion and the upper portion of the bottom plate portion, and this retaining wall portion is provided corresponding to the PC steel material,
The retaining wall portion is formed in a rib shape with a substantially constant thickness in the front-rear direction, and is formed continuously from the center in the height direction of the standing wall portion to the lower portion,
The upper part of the standing wall part is formed in a flat plate shape having a constant thickness, a recessed part recessed forward is formed between the retaining wall parts, and a thin part thinner than the upper part of the standing wall part is formed,
A block for a concrete retaining wall, wherein the bottom plate portion is formed with a ridge portion continuous with the retaining wall portion, and a recess is formed between the ridge portions .
前記PC鋼材の上定着部を前記立壁部に固定し、前記PC鋼材の下定着部をブロックの下面に開口する凹部に配置したことを特徴とする請求項1記載のコンクリート擁壁用ブロック。 The PC fixing portion fixed to the standing wall portion on the steel, according to claim 1 Symbol placement of concrete retaining wall blocks, characterized in that the lower fixing portion of the PC steel material disposed in a recess that opens to the lower surface of the block. アンボンド式の前記PC鋼材の上定着部を前記立壁部に埋設し、前記下面に開口する凹部は前記底版部の上面より下方に位置することを特徴とする請求項記載のコンクリート擁壁用ブロック。 3. The concrete retaining wall block according to claim 2 , wherein an upper fixing portion of the unbonded PC steel material is embedded in the standing wall portion, and a recess opening in the lower surface is located below the upper surface of the bottom plate portion. . 前記縦方向のPC鋼材により、前記立壁部の上部と下部とを連結したことを特徴とする請求項1〜のいずれか1項に記載のコンクリート擁壁ブロック。 The concrete retaining wall block according to any one of claims 1 to 3 , wherein an upper portion and a lower portion of the standing wall portion are connected by the PC steel material in the longitudinal direction. 前記底版部に幅方向のPC鋼材を挿通し、このPC鋼材により前記底版部に緊張力を付与したことを特徴とする請求項1〜のいずれか1項に記載のコンクリート擁壁用ブロック。 The concrete retaining wall block according to any one of claims 1 to 4 , wherein a PC steel material in the width direction is inserted into the bottom plate portion, and tension is applied to the bottom plate portion by the PC steel material.
JP2003332371A 2003-09-24 2003-09-24 Concrete retaining wall blocks Expired - Fee Related JP3972365B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003332371A JP3972365B2 (en) 2003-09-24 2003-09-24 Concrete retaining wall blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003332371A JP3972365B2 (en) 2003-09-24 2003-09-24 Concrete retaining wall blocks

Publications (2)

Publication Number Publication Date
JP2005097950A JP2005097950A (en) 2005-04-14
JP3972365B2 true JP3972365B2 (en) 2007-09-05

Family

ID=34460735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003332371A Expired - Fee Related JP3972365B2 (en) 2003-09-24 2003-09-24 Concrete retaining wall blocks

Country Status (1)

Country Link
JP (1) JP3972365B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452182A (en) * 2013-07-31 2013-12-18 浙江诚骏建设工程有限公司 Formwork structure of cast-in-place reinforced concrete cover plate of bricked inspection well and formwork structure construction process

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5798428B2 (en) * 2011-09-28 2015-10-21 カイエー共和コンクリート株式会社 Retaining wall structure with protective fence
JP5982516B1 (en) * 2015-02-27 2016-08-31 旭コンクリート工業株式会社 Retaining wall
JP6100818B2 (en) * 2015-02-27 2017-03-22 旭コンクリート工業株式会社 Retaining wall
KR101772940B1 (en) * 2015-03-05 2017-08-30 전종환 Precast concrete retaining wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452182A (en) * 2013-07-31 2013-12-18 浙江诚骏建设工程有限公司 Formwork structure of cast-in-place reinforced concrete cover plate of bricked inspection well and formwork structure construction process

Also Published As

Publication number Publication date
JP2005097950A (en) 2005-04-14

Similar Documents

Publication Publication Date Title
CN101939492B (en) Precast temporary facility structure and construction method for the same
JP2004232328A (en) Structure of semi-precast arch culvert and its construction method
JP3972365B2 (en) Concrete retaining wall blocks
JP4042153B2 (en) Construction method of wall formwork block and wall structure and underground structure
KR100760393B1 (en) Precast concrete panel and slab construction method
JP4428396B2 (en) Underground structure and its construction method
KR101967425B1 (en) Retaining wall with buttress and construction method thereof
JP3180316B2 (en) Prefabricated concrete structure
JP2004190396A (en) Half precast floor slab and construction method of floor using the same
JP2006283292A (en) Retaining wall structure and retaining wall construction method
JP6758840B2 (en) Curb-integrated gutter block and its manufacturing method
JP3778392B2 (en) Basic block
JP4547717B2 (en) Concrete structures
KR200183409Y1 (en) Precast concrete segment for arch type culvert
KR100380907B1 (en) Precast concrete segment for arch type culvert and construction method using this segment
JP2536376B2 (en) Foundation structure of shed for road protection
JP2001311168A (en) Earth retaining wall
JP3714475B2 (en) Road extension method and road extension structure
JP4013170B2 (en) How to build a large culvert
JP2000309998A (en) Precast concrete form and structure using the same
KR102297420B1 (en) Manufacturing method of a facing block using retaining wall facing block and construction method of retaining wall using the facing block
JP2004143849A (en) Spacer, variable gradient type side ditch using the spacer and its construction method
JP4045623B2 (en) Construction method of reinforced concrete underground floor and underground structure constructed by this method
JP2002194754A (en) Block for forming stepped construction joint
JP6715494B2 (en) Shed

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050510

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070215

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070305

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070426

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070521

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070603

R150 Certificate of patent or registration of utility model

Ref document number: 3972365

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100622

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110622

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120622

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120622

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130622

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees