JP6713294B2 - Himon structure substructure - Google Patents
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- JP6713294B2 JP6713294B2 JP2016022842A JP2016022842A JP6713294B2 JP 6713294 B2 JP6713294 B2 JP 6713294B2 JP 2016022842 A JP2016022842 A JP 2016022842A JP 2016022842 A JP2016022842 A JP 2016022842A JP 6713294 B2 JP6713294 B2 JP 6713294B2
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本発明は、コンクリート製の樋門構造物の下部と樋門構造物の直下の遮水矢板壁とを継ぐ、遮水性可撓性の樋門構造物下部構造に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-shielding flexible gutter structure lower structure that connects a lower part of a concrete gutter structure and a water-shielding sheet pile wall directly below the gutter structure.
河川堤防には、取水や排水のため、河川堤防を横断する樋門が設置されることがある。従来の樋門は、例えば、図７に示すように、箱状や筒状の樋門本体部１０１およびコンクリート遮水壁部１０２を備える。コンクリート遮水壁部１０２は、樋門本体部１０１の堤内側および堤外側の開口部、並びに中間などの適宜の箇所において、樋門本体部１０１の外周部の左右両側面および上方に張り出すように設けられている。樋門は、樋管と称されることもある。 A gutter that crosses the river embankment may be installed on the river embankment for water intake and drainage. A conventional gutter, for example, as shown in FIG. 7, is provided with a box-shaped or tubular gutter main body portion 101 and a concrete impermeable wall portion 102. The concrete impermeable wall portion 102 extends over both left and right side surfaces of the outer peripheral portion of the gutter gate main body 101 and upwards at appropriate places such as openings inside and outside the ridge of the gutter main body 101 and in the middle. It is provided in. The gutter is sometimes called a gutter.
また、樋門には、複数の鋼矢板１０３で構成される鋼矢板遮水壁１０４が設けられる。鋼矢板遮水壁１０４は、コンクリート遮水壁部１０２の左右両側およびその左右両側の直下、ならびに樋門本体部１０１の直下に配置されている複数の鋼矢板１０３で構成される。鋼矢板遮水壁１０４は、樋門に沿う浸透水流の発生に起因する堤防および樋門の破損を防止し、樋門および堤防周辺の安全性を確保する。 Further, the gutter is provided with a steel sheet pile impermeable wall 104 composed of a plurality of steel sheet piles 103. The steel sheet pile impervious wall 104 is composed of a plurality of steel sheet piles 103 arranged on the left and right sides of the concrete impervious wall section 102 and immediately below the left and right sides thereof, and immediately below the gutter main body section 101. The steel sheet pile impermeable wall 104 prevents breakage of the embankment and the gutter due to the generation of the seepage water flow along the gutter and secures the safety around the gutter and the embankment.
樋門の設置は、例えば以下の様に行われる。まず、図８（図７のＹ１−Ｙ１矢視図である。）に示すように、堤防１０５を点線１０６のように掘削して樋門埋設部を造る。次いでコンクリート遮水壁部１０２が設置される位置の両側およびその直下、ならびに樋門本体部１０１が設置される位置の直下の部分に複数の鋼矢板１０３を打ち込んで鋼矢板遮水壁１０４を形成する。次いで樋門本体部１０１を打設し、最後に樋門本体部１０１および鋼矢板遮水壁１０４を埋め戻す。 Installation of the gutter is performed as follows, for example. First, as shown in FIG. 8 (a view taken along the arrow Y1-Y1 in FIG. 7), the embankment 105 is excavated along a dotted line 106 to form a gutter-burying portion. Then, a plurality of steel sheet piles 103 are driven into both sides of the position where the concrete water blocking wall portion 102 is installed and immediately below the position and immediately below the position where the gutter main body portion 101 is installed to form a steel sheet pile water blocking wall 104. To do. Next, the gutter main body 101 is placed, and finally the gutter main body 101 and the steel sheet pile impermeable wall 104 are backfilled.
また、河川堤防の周辺地盤は、土圧による圧密沈下が起きることがある。圧密沈下は、水を含んだ地盤の上に構造物を建設した際に、その荷重で土中の水が抜け、体積が減少することによって生じる地盤沈下である。鋼矢板遮水壁１０４は、強固な岩盤に到達するほど深くは打設されない。そのため、圧密沈下が起きると、樋門本体部１０１およびコンクリート遮水壁部１０２の直下に位置する鋼矢板１０３−１には、負の内面摩擦力が作用して、鋼矢板１０３−１が沈下することがある。この場合、樋門本体部１０１およびコンクリート遮水壁部１０２は動かないので、鋼矢板遮水壁１０４の頂面と樋門本体部１０１およびコンクリート遮水壁部１０２の各下面との間に隙間が生じ、この隙間から漏水が起こり、樋門に沿って浸透水流が流れて堤防および樋門の破損をもたらすおそれがある。 In addition, the soil around the river embankment may undergo consolidation settlement due to earth pressure. Consolidation subsidence is subsidence that occurs when a structure is built on a ground containing water and the load causes the water in the soil to escape and the volume to decrease. The steel sheet pile impermeable wall 104 is not driven deep enough to reach a strong bedrock. Therefore, when consolidation settlement occurs, a negative inner surface friction force acts on the steel sheet pile 103-1 located immediately below the gutter main body portion 101 and the concrete impermeable wall portion 102, and the steel sheet pile 103-1 sinks. There is something to do. In this case, since the gutter main body 101 and the concrete impermeable wall 102 do not move, there is a gap between the top surface of the steel sheet pile impermeable wall 104 and the lower surfaces of the gutter main body 101 and the concrete impermeable wall 102. There is a risk that water will leak from this gap, and a permeate flow will flow along the gutter, resulting in damage to the embankment and gutter.
このような問題を解決するため、様々な樋門構造および鋼矢板遮水壁が検討されている。例えば、本出願人は、特許文献１において、矢板壁の沈下と樋管（樋門）自体の沈下の双方に対処して遮水を行うための、樋管、樋管用遮水壁およびこれらを連結する継手を開示している。この樋管用遮水壁は、樋管の両側において樋管の上端部附近から樋管の下端部を越えて下方に延長する樋管側部遮水矢板壁と、樋管底面と所定の間隔をおいて樋管の下方に位置する樋管下遮水矢板壁とを備える。また、この継手は、ゴム・合成樹脂などからなり、樋管の両側において樋管の上端部附近から樋管の下端部を越えて下方に延長する左右１対の垂直部と、該樋管下遮水矢板壁の上端縁と並行に水平方向に延長し該１対の垂直部と相互に連結する水平部を有する伸縮自在の止水部材を備え、該止水部材の各垂直部の外側端部を両側の該樋管側部遮水矢板壁の各内側端部に固定し、該垂直部と該水平部の連結部から上方の各垂直部の内側端部を樋管の各側部に固定し、該連結部から下方の各垂直部の内側端部を該樋管下遮水矢板壁の各外側端部に固定し、該水平部の上側端部を樋管の下端部に固定するとともに、該水平部の下側端部を該樋管下遮水矢板壁の上端部に固定されている。 In order to solve such problems, various gutter structures and steel sheet pile impermeable walls have been studied. For example, in the patent document 1, the present applicant discloses a gutter pipe, a gutter pipe impermeable wall, and a gutter pipe impermeable wall for performing water shielding by coping with both the settlement of the sheet pile wall and the settlement of the gutter pipe (gutter) itself. A coupling joint is disclosed. This water blocking wall for the gutter pipe has a predetermined interval between the gutter pipe side water blocking sheet pile wall that extends downward from the vicinity of the upper end of the gutter pipe over the lower end of the gutter pipe and the bottom of the gutter pipe. In addition, it is provided with a water pipe sheet wall under the gutter pipe located below the gutter pipe. Also, this joint is made of rubber, synthetic resin, etc., and a pair of left and right vertical parts extending downward from the vicinity of the upper end of the gutter pipe and beyond the lower end of the gutter pipe on both sides of the gutter pipe and the gutter pipe lower part. An elastic water stop member having a horizontal portion that extends in the horizontal direction in parallel with the upper edge of the water blocking sheet pile wall and interconnects with the pair of vertical portions, and the outer end of each vertical portion of the water stop member. Part is fixed to each inner end of the gutter pipe side water blocking sheet pile wall on both sides, and the inner end of each vertical part above the connecting part of the vertical part and the horizontal part is attached to each side part of the gutter pipe. The inner end of each vertical portion below the connecting portion is fixed to each outer end of the gutter pipe lower water-proof sheet pile wall, and the upper end of the horizontal portion is fixed to the lower end of the gutter pipe. At the same time, the lower end portion of the horizontal portion is fixed to the upper end portion of the gutter pipe underwater shield sheet wall.
また、土質によっては鋼矢板の沈下量に比べて樋管の沈下量が大きくなり、樋管の沈下を鋼矢板が妨げ、樋管にクラックが発生することがある。特許文献２には、このようなクラックの発生を防止するとともに、提体内の浸透水による水みちの助長を防止できる樋管が開示されている。この樋管には、鍔状の胸壁・遮水壁が、樋管の外周に管軸方向に所定間隔をあけて形成され、この胸壁・遮水壁と略同一鉛直面内に打設される遮水等を目的とする矢板が可撓性遮水ジョイント（継手）で接続されている。この可撓性遮水ジョイントは、開口部に相当する部分を上方に向けて前記胸壁・遮水壁の底部と両側部とに固定される、外輪郭略コの字状の内プレートと、該内プレートと同一の鉛直面内に存し、開口部に相当する部分を上方に向けて前記矢板に遮水可能に取り付けられる外輪郭略コの字状の外プレートと、該外プレートに外縁部を、前記内プレートに内縁部をそれぞれ遮水可能に取り付けられた外輪郭略コの字状の止水ゴムとを備えている。 In addition, depending on the soil quality, the amount of subsidence of the gutter pipe is larger than the amount of subsidence of the steel sheet pile, and the steel sheet pile may hinder the subsidence of the gutter pipe, causing cracks in the gutter pipe. Patent Document 2 discloses a gutter tube capable of preventing the occurrence of such cracks and preventing the promotion of the water flow due to the permeated water in the body. In this gutter pipe, a collar-shaped chest wall/impermeable wall is formed on the outer periphery of the gutter pipe at a predetermined interval in the axial direction of the gutter pipe, and is placed in substantially the same vertical plane as the chest wall/impermeable wall. Sheet piles for the purpose of impermeable water are connected by flexible impermeable joints. This flexible water impermeable joint is fixed to the bottom and both sides of the chest wall/water impermeable wall with the portion corresponding to the opening facing upward, and an inner plate having an approximately U-shaped outer contour, An outer plate, which is in the same vertical plane as the inner plate, is attached to the sheet pile so that the portion corresponding to the opening faces upward and is water-tight, and an outer edge portion of the outer plate. And a water-blocking rubber having an outer contour substantially in a U-shape attached to the inner plate so that the inner edge portions thereof are capable of blocking water.
しかしながら、樋門構造物の地盤に対する相対的沈下変位が非常に大きい場合、止水ゴム部材の厚みによっては、止水ゴム部材が完全に折畳まれて樋門構造物と樋門構造物下部の遮水矢板の間に挟まれることで遮水矢板に樋門構造物が乗り上げる形となり、結果として樋門構造物に発生する沈下変位を阻害し、樋門構造物に曲げが生じて、クラックを発生させ、漏水へとつながる恐れもある。また、止水ゴム部材の領域に土砂やコンクリートが侵入してしまうと、止水ゴム部材の撓みを阻害することがある。 However, if the subsidence displacement of the gutter structure relative to the ground is very large, depending on the thickness of the waterproof rubber member, the waterproof rubber member may be completely folded and the gutter structure and the lower part of the gutter structure may be broken. By being sandwiched between the water-imparting sheet piles, the gutter structure climbs onto the water-imparting sheet piles, which hinders the subsidence displacement that occurs in the gutter structure and causes bending of the gutter structure, causing cracks. It may cause water leakage. Further, if soil or concrete enters the area of the waterproof rubber member, the flexure of the waterproof rubber member may be hindered.
従って、本発明が解決しようとする課題は、樋門構造物の地盤に対する相対的沈下に対して、確実に変位を吸収し、地盤反力の影響を構造物側へ伝達せず、樋門構造物の破壊や漏水を防ぐことができる、より安全な樋門を提供することにある。 Therefore, the problem to be solved by the present invention is to reliably absorb the displacement with respect to the relative settlement of the gutter structure with respect to the ground, and not to transmit the influence of the ground reaction force to the structure side. It is to provide a safer gutter that can prevent the destruction of things and water leakage.
上記目的を達成するため、本発明の樋門構造物下部構造は、
コンクリート製の樋門構造物の下部と前記樋門構造物の直下の遮水矢板壁とを継ぐ、遮水性可撓性の樋門構造物下部構造であって、
前記樋門構造物の下部と前記遮水矢板壁とを継ぐ、ゴムや樹脂などからなる可撓性の止水部材、及び前記樋門構造物の下部と前記遮水矢板壁の上部との隙間に密着状態で配置されておりかつ前記止水部材を囲むクッション部材を備え、
前記クッション部材は、縦方向の構造体を有する中空構造であり、前記止水部材の設置領域の両側に１番目に位置する前記縦方向の構造体には、それぞれ外側に向かって折れ曲がるように起点が設けられており、
前記止水部材は、撓んで折り畳まれた総厚みｗａｌｌが、前記樋門構造物と前記遮水矢板壁との間の許容変位量Ａと、前記樋門構造物の下部と前記遮水矢板壁の上部との隙間距離ｄとに対して、式１：ｗａｌｌ＋Ａ＜ｄ の関係を満たし、
前記クッション部材は、許容応力が、前記樋門構造物のコンクリート打設時の前記クッション部材に掛かるグラウト自重圧力より大きく、かつ圧縮応力度が、前記樋門構造物のコンクリートの許容圧縮応力度未満である。
In order to achieve the above object, the gutter structure lower structure of the present invention,
A lower part of the concrete gutter structure and a water shield sheet pile wall directly below the gutter structure, which is a water-shielding flexible gutter structure lower structure,
A flexible water blocking member made of rubber, resin, or the like that connects the lower portion of the gutter structure and the water blocking sheet pile wall, and the gap between the lower portion of the gutter structure and the upper portion of the water blocking sheet pile wall. A cushion member that is disposed in close contact with and surrounds the water blocking member,
The cushion member is a hollow structure having a vertical structure, and each of the vertical structures located first on both sides of the installation region of the water blocking member has a starting point that bends outward. Is provided,
The water blocking member has a total thickness w all that is bent and folded, an allowable displacement amount A between the gutter structure and the water blocking sheet pile wall, a lower portion of the gutter structure and the water blocking sheet pile. With respect to the gap distance d to the upper part of the wall, the relationship of the formula 1:w all +A<d is satisfied,
The cushion member has an allowable stress larger than a grout's own weight pressure applied to the cushion member at the time of concrete placing of the gutter structure, and a compressive stress degree thereof is less than an allowable compressive stress degree of the concrete of the gutter structure. Is.
前記止水部材は、蛇腹構造であり、
前記蛇腹構造は、厚みｗのゴム板が山数ｎで折られた構造であり、前記ゴム板の厚みｗ、前記山数ｎ、前記許容変位量Ａ、および前記隙間距離ｄが、
式２：ｗ×ｎ×２＋Ａ＜ｄ の関係を満たす、と好ましい。
The water blocking member has a bellows structure,
The bellows structure is a structure in which a rubber plate having a thickness w is folded at a number of ridges n, and the thickness w of the rubber plate, the number of ridges n, the allowable displacement amount A, and the gap distance d are
Formula 2: It is preferable to satisfy the relationship of w×n×2+A<d.
前記止水部材は、平板構造であり、許容伸び率が１００％以内のゴム板で構成される、と好ましい。 It is preferable that the water blocking member has a flat plate structure and is made of a rubber plate having an allowable elongation rate of 100% or less.
前記止水部材の設置領域の両側から２番目に位置する前記縦方向の構造体には、それぞれ外側に向かって折れ曲がるように起点が設けられている、と好ましい。 It is preferable that a starting point is provided in each of the vertical structures located second from both sides of the water blocking member installation region so as to be bent outward .
本発明によれば、樋門構造物の地盤に対する相対的沈下に対して、確実に変位を吸収し、地盤反力の影響を構造物側へ伝達せず、樋門構造物の破壊や漏水を防ぐことができる、より安全な樋門が提供される。 ADVANTAGE OF THE INVENTION According to this invention, with respect to the relative settlement of the gutter gate structure to the ground, the displacement is reliably absorbed, the influence of the ground reaction force is not transmitted to the structure side, and damage or leakage of the gutter gate structure is prevented. A safer gutter is provided that can be prevented.
以下、本発明の実施形態について図を参照して説明するが、本発明の範囲はこれに限定されない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited thereto.
本発明の樋門構造物下部構造は、遮水性、可撓性を有し、コンクリート製の樋門構造物と遮水矢板壁の継手の構造の内、コンクリート製の樋門構造物の下部と前記樋門構造物の直下の遮水矢板壁とを継ぐ構造に適用できる。 The gutter structure lower structure of the present invention has water impermeability, flexibility, and among the structures of the joint between the concrete gutter structure and the water-proof sheet pile wall, the lower part of the concrete gutter structure and It can be applied to a structure that joins the water-proof sheet pile wall directly below the gutter structure.
図５は、本発明の樋門構造物下部構造を適用した、樋門構造物及び遮水矢板壁を備える樋門の正面図である。図５の態様では、矢板は鋼製の矢板である。樋門構造物２０１の両側には、樋門構造物２０１の上端部附近の高さから樋門構造物２０１の下端部の高さを越えて下方に延長する複数の鋼矢板２０２が樋門構造物２０１の軸方向と直交する方向に延長するように連結されて打設されて左右１対の樋門側部の遮水矢板壁２０３を形成している。また樋門構造物２０１の下方には、樋門構造物２０１の底面と所定の間隔をおいて複数の鋼矢板２０４が樋門構造物２０１の軸方向と直交する方向に延長するように連結され打設されて樋門下の遮水矢板壁２０５を形成している。 FIG. 5 is a front view of a gutter gate including a gutter structure and a water-proof sheet pile wall, to which the gutter structure lower structure of the present invention is applied. In the aspect of FIG. 5, the sheet pile is a steel sheet pile. On both sides of the gutter structure 201, there are a plurality of steel sheet piles 202 extending downward from a height near the upper end of the gutter structure 201 to a height below the lower end of the gutter structure 201. The water impingement sheet pile walls 203 on the left and right sides of the gutter are formed by connecting and driving so as to extend in a direction orthogonal to the axial direction of the object 201. A plurality of steel sheet piles 204 are connected to the bottom of the gutter structure 201 at a predetermined distance from the bottom of the gutter structure 201 so as to extend in a direction orthogonal to the axial direction of the gutter structure 201. It is cast and forms the water-proof sheet pile wall 205 under the gutter.
次に、本発明の樋門構造物下部構造を図１を用いて説明する。樋門構造物下部構造は、図５の樋門構造物２０１の下部と、樋門構造物２０１の直下の樋門下の遮水矢板壁２０５とを連結する構造である。図１は、図５のＹ２−Ｙ２矢視図であり、本発明の樋門構造物下部構造の常態を表している。 Next, the lower structure of the gutter structure of the present invention will be described with reference to FIG. The lower part of the gutter structure is a structure that connects the lower part of the gutter structure 201 of FIG. 5 and the water impervious sheet pile wall 205 under the gutter directly below the gutter structure 201. FIG. 1 is a Y2-Y2 arrow view of FIG. 5, and shows a normal state of the gutter structure lower structure of the present invention.
本発明の遮水性可撓性鋼矢板壁の構造物下部構造は、樋門構造物の下部となる上部コンクリート固定部２０６（樋門構造物）の下部と樋門下の遮水矢板壁２０５（遮水矢板壁）とを継ぐ、ゴムや樹脂などからなる可撓性の止水部材２０７（以下、後述の垂直な止水部材を区別するために水平止水部材と呼ぶことがある）と、上部コンクリート固定部２０６（樋門構造物）の下部と、樋門下の遮水矢板壁２０５上部との隙間に密着状態で配置されておりかつ水平止水部材２０７を囲むクッション部材２０８とを備える。 The structure lower structure of the water-impervious flexible steel sheet pile wall of the present invention includes a lower part of the upper concrete fixing portion 206 (the gutter structure) which is a lower part of the gutter structure and a water-shielding sheet pile wall 205 (a part of the gutter structure) under the gutter. A flexible water stop member 207 (hereinafter, may be referred to as a horizontal water stop member for distinguishing a vertical water stop member described later) made of rubber or resin to connect with a water sheet pile wall) A cushion member 208 is provided which is disposed in close contact with the lower portion of the concrete fixing portion 206 (gutter structure) and the upper portion of the water blocking sheet pile wall 205 under the gutter and surrounds the horizontal water stop member 207.
水平止水部材２０７は、中央の膨出部２０７ａと両端の固定部２０７ｂ、２０７ｂ’を備え、上部の固定部２０７ｂにおいて押え板２０９と断面Ｌ字形の固定板２１０を介してボルトナット２１１により固定されている。この固定板２１０はアンカーボルト２１２（ボルトナット２１１のボルトと同一のものでも別体のものでもよい）により樋門構造物２０１と一体に打設される上部コンクリート固定部２０６に固定されている。 The horizontal water stop member 207 is provided with a central bulging portion 207a and fixing portions 207b and 207b' at both ends, and is fixed by a bolt nut 211 through a holding plate 209 and a fixing plate 210 having an L-shaped cross section at the upper fixing portion 207b. Has been done. This fixing plate 210 is fixed to an upper concrete fixing portion 206 that is integrally cast with the gutter structure 201 by anchor bolts 212 (which may be the same as the bolts of the bolt nut 211 or may be a separate member).
水平止水部材２０７は下部の固定部２０７ｂ’において、押え板２０９’と断面Ｌ字形の固定板２１０’を介してボルトナット２１１’により固定されている。この固定板２１０’はアンカーボルト２１２’（ボルトナット２１１’と同一のものでも別体のものでもよい）により樋門下の遮水矢板壁２０５を形成する各鋼矢板２０４が埋設される下部コンクリート固定部２１３に固定される一方、樋門下の遮水矢板壁２０５を形成する各鋼矢板２０４に溶接されている。 The horizontal water stop member 207 is fixed to the lower fixing portion 207b' by a bolt nut 211' via a holding plate 209' and a fixing plate 210' having an L-shaped cross section. This fixing plate 210' is a lower concrete fixing in which each steel sheet pile 204 forming the water-shielding sheet pile wall 205 under the gutter is embedded by an anchor bolt 212' (the same as or different from the bolt nut 211'). While being fixed to the portion 213, it is welded to each steel sheet pile 204 that forms the water blocking sheet pile wall 205 under the gutter.
水平止水部材２０７は、可撓性があり、樋門構造物２０１と樋門下の遮水矢板壁２０５の変位を吸収する。止水部材は、撓んで折り畳まれた総厚みｗａｌｌ（図不示）が、樋門構造物２０１と樋門下の遮水矢板壁２０５との間の許容変位量Ａ（図２参照）と、樋門構造物２０１の下部と樋門下の遮水矢板壁２０５の上部との隙間距離ｄとに対して、式１：ｗａｌｌ＋Ａ＜ｄ の関係を満たす。ここで、図１に示す態様では、樋門構造物２０１の下部は、上部コンクリート固定部２０６の下部であり、樋門下の遮水矢板壁２０５の上部は、下部コンクリート固定部２１３の上部である。 The horizontal water stop member 207 is flexible and absorbs the displacement of the gutter structure 201 and the water shield sheet pile wall 205 under the gutter. The water blocking member has a total thickness w all (not shown) that is bent and folded, and an allowable displacement amount A (see FIG. 2) between the gutter structure 201 and the water blocking sheet pile wall 205 below the gutter, The relationship of the formula 1:w all +A<d is satisfied with respect to the gap distance d between the lower part of the gutter structure 201 and the upper part of the impervious sheet pile wall 205 under the gutter. Here, in the aspect shown in FIG. 1, the lower part of the gutter structure 201 is the lower part of the upper concrete fixing part 206, and the upper part of the water-proof sheet pile wall 205 under the gutter is the upper part of the lower concrete fixing part 213. ..
また、許容変位量Ａは、樋門に想定される、樋門下の遮水矢板壁２０５の不等沈下や背面土圧等による最大変位であり、環境や法令などにより求められる安全のための数値であり、例えば２００ｍｍである。 In addition, the allowable displacement amount A is the maximum displacement that is assumed in the gutter due to uneven settlement of the impervious sheet pile wall 205 under the gutter and back earth pressure, and is a numerical value for safety required by the environment and laws. And is, for example, 200 mm.
図２は、図１の樋門構造物下部構造において、樋門構造物２０１と樋門下の遮水矢板壁２０５に相対変位が生じた状態を示してあり、その変位が許容変位量と同じ値Ａに達した状態である。樋門構造物下部構造が前記の関係を満たすと、図２に示すように、水平止水部材２０７が完全に折畳まれず、樋門構造物２０１と樋門下の遮水矢板壁２０５（下部コンクリート固定部２１３）の上部に隙間が残るので、遮水矢板に樋門構造物が乗り上げたりせずに、樋門構造物２０１と樋門下の遮水矢板壁２０５の間での荷重の伝達が防げる。そのため、樋門構造物に発生する沈下変位を阻害せず、樋門構造物に曲げが生じないので、クラックの発生による漏水などを防ぐことができる。 FIG. 2 shows a state in which relative displacement has occurred between the gutter structure 201 and the impervious sheet pile wall 205 under the gutter in the gutter structure lower structure of FIG. 1, and the displacement is equal to the allowable displacement amount. It is in a state of reaching A. When the lower structure of the gutter structure satisfies the above relationship, as shown in FIG. 2, the horizontal water blocking member 207 is not completely folded, and the gutter structure 201 and the impervious sheet pile wall 205 under the gutter (lower part). Since a gap remains in the upper part of the concrete fixing portion 213), the load transfer between the gutter structure 201 and the gutter wall 205 under the gutter does not occur because the gutter structure does not ride on the water impermeable sheet pile. Can be prevented. Therefore, the subsidence displacement generated in the gutter structure is not hindered, and the gutter structure is not bent, so that water leakage due to cracks can be prevented.
止水部材は、図１に示すような蛇腹構造であっても平板構造であってもよい。また、止水部材が、図１に示すように厚みｗの板が山数ｎ（図１ではｎ＝２である。）で折られた構造である場合には、前記の式１に加えて、式２：ｗ×ｎ×２＋Ａ＜ｄ の関係を満たす。 The water blocking member may have a bellows structure as shown in FIG. 1 or a flat plate structure. In addition, in the case where the water blocking member has a structure in which a plate having a thickness w is folded at the number of peaks n (n=2 in FIG. 1) as shown in FIG. Formula 2: The relationship of w×n×2+A<d is satisfied.
水平止水部材２０７は、平板構造であってもよい。平板構造では、平らなゴム板で樋門構造物２０１と樋門下の遮水矢板壁２０５が連結される。水平止水部材２０７（止水部材）が平板構造の場合は、許容伸び率が１００％以内のゴム板で構成される。許容伸び率は、４０％以内であるとより好ましい。 The horizontal water blocking member 207 may have a flat plate structure. In the flat plate structure, the gutter structure 201 and the impervious sheet pile wall 205 under the gutter are connected by a flat rubber plate. When the horizontal water blocking member 207 (water blocking member) has a flat plate structure, the horizontal water blocking member 207 is made of a rubber plate having an allowable elongation of 100% or less. The allowable elongation rate is more preferably within 40%.
クッション部材２０８は、図１の態様では、上部コンクリート固定部２０６と下部コンクリート固定部２１３との隙間に、密着状態で配置され、水平止水部材２０７を囲んでいる。なお、本明細書では、クッション部材２０８が、樋門構造物２０１の下部と樋門下の遮水壁矢板壁２０５の上部との間に密着状態で配置されているという場合には、便宜上本態様のように、クッション部材２０８が、樋門構造物の下部である上部コンクリート固定部２０６と、樋門下の遮水矢板壁２０５を形成する各鋼矢板２０４が埋設される下部コンクリート固定部２１３との隙間に密着状態で配置されている態様も含む。すなわち、他の部材を介して樋門構造物２０１の下部と樋門下の遮水矢板壁２０５の上部との間に密着状態で配置されている態様を含む。 In the aspect of FIG. 1, the cushion member 208 is arranged in a close contact state in the gap between the upper concrete fixing portion 206 and the lower concrete fixing portion 213 and surrounds the horizontal water blocking member 207. In the present specification, in the case where the cushion member 208 is arranged in a close contact state between the lower part of the gutter structure 201 and the upper part of the water shield wall sheet pile wall 205 under the gutter, for convenience, this aspect As described above, the cushion member 208 is composed of the upper concrete fixing portion 206 which is the lower portion of the gutter structure and the lower concrete fixing portion 213 in which the respective steel sheet piles 204 forming the water blocking sheet pile wall 205 under the gutter are embedded. It also includes a mode in which it is arranged in close contact with the gap. That is, it includes a mode in which the lower part of the gutter structure 201 and the upper part of the impervious sheet pile wall 205 under the gutter are arranged in close contact with each other via another member.
このようにクッション部材２０８が密着状態で配置され、かつ水平止水部材２０７を囲んでいることにより、クッション部材２０８は、充填材、並びに土砂及びコンクリートの変形範囲への侵入防止材としての機能を果たす。 Since the cushion member 208 is closely arranged and surrounds the horizontal water stop member 207 in this manner, the cushion member 208 functions as a filling material and a material for preventing intrusion into the deformation range of earth and sand and concrete. Fulfill
また、クッション部材２０８として、許容応力が、樋門構造物２０１のコンクリート打設時のクッション部材２０８に掛かるグラウト自重圧力より大きいものを用いる。従って、クッション部材２０８は、施工時の仮支えとしての機能も果たす。ここで、グラウト自重圧力とは、グラウトの単位体積重量に打設高さを乗じ求められる圧力であり、一般的には打設高さは１０ｍを超えない。 Further, as the cushion member 208, one having an allowable stress larger than the grout's own weight pressure applied to the cushion member 208 at the time of placing concrete of the gutter structure 201 is used. Therefore, the cushion member 208 also functions as a temporary support during construction. Here, the grout self-weight pressure is a pressure obtained by multiplying the unit volume weight of the grout by the driving height, and generally, the driving height does not exceed 10 m.
また、クッション部材２０８として、圧縮応力度が、樋門構造物２０１のコンクリート構造物（上部コンクリート固定部２０６）の許容圧縮応力度未満であるものを用いる。従って、クッション部材２０８は、圧縮変形時に構造物の変位を阻害したり、破壊したりすることを防ぐことができる。 Further, as the cushion member 208, one having a compressive stress degree lower than the allowable compressive stress degree of the concrete structure (upper concrete fixing portion 206) of the gutter structure 201 is used. Therefore, the cushion member 208 can prevent the displacement of the structure from being disturbed or destroyed during compression deformation.
このようなクッション部材２０８としては、上記の要件を満たす中実品であってもよいが、例えば中空構造が挙げられる。また、材質としては、発泡ゴムが好ましい。図１のクッション部材２０８は、中空構造である。中空構造には、可撓性の止水部材の撓みを阻害しないように、圧縮される際に外側に折れ曲がるように起点を設けることが好ましい。この様な起点としては、クッション部材２０８が中空構造の縦方向の構造体の厚みを少なくとも一部分薄くしたものが挙げられる。例えば、図１に示すような円弧の窪み２１４やくさび状の凹部を設けたもの、縦方向の構造体を２枚の層で構成し、山折り２１５（図２参照）に折らせたい中央部分や付け根部分を１層にして凹部を設けたものが挙げられる。通常、図２に示すように凹部を設けた部分で、反対面側が山折り２１５になるように折らせることができる。このように、水平止水部材２０７の設置領域の両側に１番目に位置するクッション部材２０８の縦方向の構造体がそれぞれ外側に向かって、折れ曲がると好ましい。これにより、止水部材の設置領域に土砂が侵入することによる、クリアランス確保を阻害することを防ぐだけでなく、クッション部材２０８自体が水平止水部材２０７の撓みを阻害することを防ぐことが出来る。中空構造の中空空間には、前記の屈曲を阻害しない範囲で充填物を含むことができる。 Although such a cushion member 208 may be a solid product that satisfies the above requirements, for example, it may have a hollow structure. Further, as the material, foamed rubber is preferable. The cushion member 208 in FIG. 1 has a hollow structure. The hollow structure is preferably provided with a starting point so as to bend outward when being compressed so as not to impede the bending of the flexible water blocking member. An example of such a starting point is that the cushion member 208 has at least partly reduced the thickness of the hollow structure in the vertical direction. For example, an arc-shaped depression 214 or a wedge-shaped depression as shown in FIG. 1, a vertical structure composed of two layers, and a central portion to be folded into a mountain fold 215 (see FIG. 2). An example is one in which the base portion is formed as a single layer and a concave portion is provided. Normally, as shown in FIG. 2, in a portion provided with a recess, it can be folded so that the opposite surface side becomes a mountain fold 215. In this manner, it is preferable that the vertical structures of the cushion members 208 located first on both sides of the installation area of the horizontal water blocking member 207 be bent outward. This can prevent not only the clearance securing due to the intrusion of earth and sand into the installation region of the water blocking member but also the cushion member 208 itself from blocking the bending of the horizontal water blocking member 207. .. The hollow space of the hollow structure may contain a filler as long as the bending is not hindered.
図３及び図４は、クッション部材２０８’の折られ方の別の態様である。図３は常態の断面図であり、図４は図３の樋門構造物下部構造において、樋門と鋼矢板の相対変位が許容変位量Ａに達した状態を示す断面図である。この態様では、クッション部材２０８’の縦方向の構造体に設ける凹部を、水平止水部材２０７の設置領域側から外側に２番目以降について内側に設けて、内側に折る態様である。 3 and 4 show another mode of folding the cushion member 208'. FIG. 3 is a cross-sectional view in a normal state, and FIG. 4 is a cross-sectional view showing a state in which the relative displacement between the gutter and the steel sheet pile reaches the allowable displacement amount A in the gutter structure lower structure of FIG. In this embodiment, the recessed portion provided in the vertical structure of the cushion member 208 ′ is provided inward from the installation area side of the horizontal water blocking member 207 for the second and subsequent inner portions and folded inward.
次に、図５および図６を用いて、垂直部可撓遮水継手２１７について説明する。垂直部可撓遮水継手２１７は、垂直止水部材２１８を備えている。垂直止水部材２１８は、可撓性のゴムや合成樹脂などからなり、樋門構造物２０１の両側において樋門構造物２０１の上端部附近の高さ位置から樋門構造物２０１下端部の高さを越えて下方に延長する左右１対の部材である。 Next, the vertical flexible water blocking joint 217 will be described with reference to FIGS. 5 and 6. The vertical flexible water blocking joint 217 includes a vertical water blocking member 218. The vertical water stop member 218 is made of flexible rubber or synthetic resin, and is located on both sides of the gutter structure 201 from a height position near the upper end of the gutter structure 201 to a height of the lower end of the gutter structure 201. It is a pair of left and right members that extend downward beyond the height.
垂直止水部材２１８は、図５のＹ３−Ｙ３矢視図である図６に示すように、中央の膨出部２１８ａと両端の固定部２１８ｂ、２１８ｂ’とを備え、固定部２１８ｂ、２１８ｂ’において、鋼矢板を半割にした形状の左右１対の垂直部固定板２１９、２１９’に押え板２２０、２２０’を介してボルトナット２２１、２２１’により固定されている。内側の垂直部固定板２１９は垂直止水部材２１８と水平止水部材２０７の連結部２２２から上方の部分である上部垂直部固定板２１９−１と連結部２２２から下方の部分である下部垂直部固定板２１９−２の２部分に分割されている。外側の垂直部固定板２１９’は上下一体のものである。外側の垂直部固定板２１９’は樋門側部の遮水矢板壁２０３のうち、内端に位置する鋼矢板２０４−１に連結されており、内側の垂直部固定板２１９のうち、上部垂直部固定板２１９−１は樋門構造物２０１の両側部に部分的に埋設されるようにして樋門構造物２０１の両側部に固定される固定鋼矢板２２３に連結され、下部垂直部固定板２１９−２は樋門下の遮水矢板壁２０５の外端に位置する鋼矢板２０４−１に連結されている。 As shown in FIG. 6 which is a Y3-Y3 arrow view of FIG. 5, the vertical water blocking member 218 includes a central bulging portion 218a and fixing portions 218b and 218b′ at both ends, and fixing portions 218b and 218b′. In the above, the steel sheet piles are fixed to the pair of left and right vertical portion fixing plates 219 and 219' in a shape cut in half by holding bolts 221 and 221' via holding plates 220 and 220'. The inner vertical part fixing plate 219 is an upper vertical part fixing plate 219-1 that is a part above the connecting part 222 of the vertical water blocking member 218 and the horizontal water blocking member 207 and a lower vertical part that is a part below the connecting part 222. The fixed plate 219-2 is divided into two parts. The outer vertical part fixing plate 219' is integrated into the upper and lower parts. The outer vertical portion fixing plate 219′ is connected to the steel sheet pile 204-1 located at the inner end of the water blocking sheet pile wall 203 on the side of the gutter, and the upper vertical portion of the inner vertical portion fixing plate 219. The part fixing plates 219-1 are connected to fixed steel sheet piles 223 fixed to both sides of the gutter structure 201 so as to be partially embedded in both sides of the gutter structure 201, and a lower vertical part fixing plate 219-2 is connected to the steel sheet pile 204-1 located at the outer end of the water-proof sheet pile wall 205 under the gutter.
図５の態様では、垂直止水部材２１８が固定された垂直部固定板２１９、２１９’を打設する際に打設を容易にするとともに垂直止水部材２１８が岩石等との接触により損傷することを防止するために下部垂直部固定板２１９−２と外側の垂直部固定板２１９’の下半分を覆う保護板２２４が設けてある。 In the embodiment shown in FIG. 5, when the vertical portion fixing plates 219 and 219' to which the vertical water blocking member 218 is fixed, the vertical water blocking member 218 is easily damaged and the vertical water blocking member 218 is damaged by contact with rocks or the like. In order to prevent this, a lower vertical fixing plate 219-2 and a protective plate 224 covering the lower half of the outer vertical fixing plate 219' are provided.
本発明は、本発明の広義の精神と範囲を逸脱することなく、様々な実施の形態及び変形が可能とされるものである。また、上述した実施の形態は、この発明を説明するためのものであり、本発明の範囲を限定するものではない。すなわち、本発明の範囲は、実施の形態ではなく、特許請求の範囲によって示される。そして、特許請求の範囲内及びそれと同等の発明の意義の範囲内で施される様々な変形が、この発明の範囲内とみなされる。 The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. Further, the above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are regarded as within the scope of the present invention.
１０１ 樋門本体部
１０２ コンクリート遮水壁部
１０３、１０３−１ 鋼矢板
１０４ 鋼矢板遮水壁
１０５ 堤防
１０６ 点線
２０１ 樋門構造物
２０２ 鋼矢板
２０３ 樋門側部の遮水矢板壁
２０４、２０４−１ 鋼矢板
２０５ 樋門下の遮水矢板壁
２０６ 上部コンクリート固定部
２０７ 水平止水部材
２０７ａ 中央の膨出部
２０７ｂ、２０７ｂ’ 両端の固定部
２０８、２０８’ クッション部材
２０９、２０９’ 押え板
２１０、２１０’ 断面Ｌ字形の固定板
２１１、２１１’ ボルトナット
２１２、２１２’ アンカーボルト
２１３ 下部コンクリート固定部
２１４ 窪み
２１５ 山折り
２１６、２１６’ ボルトナット
２１７ 垂直部可撓遮水継手
２１８ 垂直止水部材
２１８ａ 中央の膨出部
２１８ｂ、２１８ｂ’ 両端の固定部
２１９、２１９’ 垂直部固定板
２１９−１ 上部垂直部固定板
２１９−２ 下部垂直部固定板
２２０、２２０’ 押え板
２２１、２２１’ ボルトナット
２２２ 連結部
２２３ 固定鋼矢板
２２４ 保護板
101 Gutter main body part 102 Concrete impermeable wall part 103, 103-1 Steel sheet pile 104 Steel sheet pile impermeable wall 105 Levee 106 Dotted line 201 Gutter structure 202 Steel sheet pile 203 Water impervious sheet wall 204, 204- 1 Steel sheet pile 205 Water-impermeable sheet pile wall under gutter 206 Upper concrete fixing part 207 Horizontal water stop member 207a Central bulging part 207b, 207b' Both ends fixing part 208, 208' Cushion member 209, 209' Holding plate 210, 210 'Fixed plate with L-shaped cross section 211, 211' Bolt nut 212, 212' Anchor bolt 213 Lower concrete fixing part 214 Dimple 215 Mountain fold 216, 216' Bolt nut 217 Vertical part flexible water blocking joint 218 Vertical water blocking member 218a Center Bulging part 218b, 218b' Both end fixing parts 219, 219' Vertical part fixing plate 219-1 Upper vertical part fixing plate 219-2 Lower vertical part fixing plate 220, 220' Holding plate 221, 221' Bolt nut 222 Connection 223 Fixed steel sheet pile 224 Protective plate
Claims (4)
前記樋門構造物の下部と前記遮水矢板壁とを継ぐ、ゴムや樹脂などからなる可撓性の止水部材、及び前記樋門構造物の下部と前記遮水矢板壁の上部との隙間に密着状態で配置されておりかつ前記止水部材を囲むクッション部材を備え、
前記クッション部材は、縦方向の構造体を有する中空構造であり、前記止水部材の設置領域の両側に１番目に位置する前記縦方向の構造体には、それぞれ外側に向かって折れ曲がるように起点が設けられており、
前記止水部材は、撓んで折り畳まれた総厚みｗａｌｌが、前記樋門構造物と前記遮水矢板壁との間の許容変位量Ａと、前記樋門構造物の下部と前記遮水矢板壁の上部との隙間距離ｄとに対して、式１：ｗａｌｌ＋Ａ＜ｄ の関係を満たし、
前記クッション部材は、許容応力が、前記樋門構造物のコンクリート打設時の前記クッション部材に掛かるグラウト自重圧力より大きく、かつ圧縮応力度が、前記樋門構造物のコンクリートの許容圧縮応力度未満である、樋門構造物下部構造。 A lower part of the concrete gutter structure and a water shield sheet pile wall directly below the gutter structure, which is a water-shielding flexible gutter structure lower structure,
A flexible water blocking member made of rubber, resin, or the like that connects the lower portion of the gutter structure and the water blocking sheet pile wall, and the gap between the lower portion of the gutter structure and the upper portion of the water blocking sheet pile wall. A cushion member that is disposed in close contact with and surrounds the water blocking member,
The cushion member is a hollow structure having a vertical structure, and each of the vertical structures located first on both sides of the installation region of the water blocking member has a starting point that bends outward. Is provided,
The water blocking member has a total thickness w all that is bent and folded, an allowable displacement amount A between the gutter structure and the water blocking sheet pile wall, a lower portion of the gutter structure and the water blocking sheet pile. With respect to the gap distance d to the upper part of the wall, the relationship of the formula 1:w all +A<d is satisfied,
The cushion member has an allowable stress larger than a grout's own weight pressure applied to the cushion member at the time of concrete placing of the gutter structure, and a compressive stress degree thereof is less than an allowable compressive stress degree of the concrete of the gutter structure. Is the substructure of the gutter structure.
前記蛇腹構造は、厚みｗのゴム板が山数ｎで折られた構造であり、前記ゴム板の厚みｗ、前記山数ｎ、前記許容変位量Ａ、および前記隙間距離ｄが、
式２：ｗ×ｎ×２＋Ａ＜ｄ の関係を満たす、
請求項１に記載の樋門構造物下部構造。 The water blocking member has a bellows structure,
The bellows structure is a structure in which a rubber plate having a thickness w is folded at a number of ridges n, and the thickness w of the rubber plate, the number of ridges n, the allowable displacement amount A, and the gap distance d are
Formula 2: The relationship of w×n×2+A<d is satisfied,
The gutter structure lower structure according to claim 1.
請求項１に記載の樋門構造物下部構造。 The water blocking member has a flat plate structure and is made of a rubber plate having an allowable elongation rate of 100% or less.
The gutter structure lower structure according to claim 1.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6471924A (en) * | 1987-09-09 | 1989-03-16 | Kajima Corp | Concrete earth-floor slab of building |
| JPH07292687A (en) * | 1991-12-04 | 1995-11-07 | Mitsui Home Co Ltd | Basic structure of building and construction method of foundation |
| JP2681612B2 (en) * | 1994-09-06 | 1997-11-26 | 西武ポリマ化成株式会社 | Sediment intrusion prevention structure at joints of underground structures |
| JP2997757B2 (en) * | 1995-06-22 | 2000-01-11 | 新日本製鐵株式会社 | Flexible impermeable joint |
| JP3098210B2 (en) * | 1997-08-26 | 2000-10-16 | 西武ポリマ化成株式会社 | Flexible impermeable joint for gutter pipe |
| JP3284101B2 (en) * | 1998-06-16 | 2002-05-20 | 西武ポリマ化成株式会社 | Impermeable structure for tapping water |
| JP4556203B2 (en) * | 2001-03-02 | 2010-10-06 | ニッタ株式会社 | Water stoppage material |
| KR100838243B1 (en) * | 2007-10-17 | 2008-06-17 | 주식회사 도화종합기술공사 | Vertical Displacement Absorption Board Pile for River Order Wall |
| JP6061238B2 (en) * | 2011-11-08 | 2017-01-18 | 藤村ヒューム管株式会社 | Tubular buried object and manufacturing method thereof |
| EP2831343B1 (en) * | 2012-03-29 | 2016-12-21 | Rockwool International A/S | A pile grounded construction and a method for making such a construction |
| MX2016005729A (en) * | 2013-11-01 | 2016-11-29 | Gabrielli Zacharias Calixto Jorge | Expansion joint. |
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