JP2009046853A - Water cutoff structure of earth retaining wall, and water cutoff structure construction method - Google Patents

Water cutoff structure of earth retaining wall, and water cutoff structure construction method Download PDF

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JP2009046853A
JP2009046853A JP2007212989A JP2007212989A JP2009046853A JP 2009046853 A JP2009046853 A JP 2009046853A JP 2007212989 A JP2007212989 A JP 2007212989A JP 2007212989 A JP2007212989 A JP 2007212989A JP 2009046853 A JP2009046853 A JP 2009046853A
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joint
water
retaining wall
core material
joint member
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Takumi Suzuki
巧 鈴木
Mitsuo Tono
光男 東野
Setsu Nozawa
摂 野澤
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Obayashi Corp
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Obayashi Corp
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<P>PROBLEM TO BE SOLVED: To provide a water cutoff structure which cuts off water at a joint portion between mutually adjacent elements of an earth retaining wall. <P>SOLUTION: The water cutoff structure 7 of the earth retaining wall 1 cuts off water at a gap between the mutually adjacent elements 2, 2 of the earth retaining wall 1 constructed by horizontally arranging the plurality of elements 2 each having cores 3. The water cutoff structure 7 is composed of a water cutoff means 10 which is formed of: one joint member 11 attached to the core 3a at an end of one of the mutually adjacent elements 2b; the other joint member 15 attached to the core 3b at an end of the other element 2c, and engageable in the one joint member 11; and a sealing member 20 interposed at an engaging portion between the one joint member 11 and the other joint member 15, for watertightly sealing the engaging portion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、土留壁の止水構造及び止水構造の構築方法に関し、特に、土留壁を本体構造物の地下外壁等として利用する際に、土留壁の隣接するエレメント間を止水するのに有効な土留壁の止水構造及び止水構造の構築方法に関する。   TECHNICAL FIELD The present invention relates to a retaining structure for a retaining wall and a construction method for the retaining structure, and in particular, when the retaining wall is used as an underground outer wall of a main body structure, for stopping water between adjacent elements of the retaining wall. The present invention relates to an effective water retaining structure of a retaining wall and a construction method of the water retaining structure.

一般に、地中に構築した土留壁を本体構造物の地下外壁等として利用する場合、土留壁側から漏れ出た雨水や湧水等が本体構造物に作用し、本体構造物の耐久性に影響を与えるのを防止するため、土留壁の壁面及び土留壁の隣接するエレメント間に止水構造を施し、土留壁からの漏水が本体構造物に作用するのを防止している。   In general, when using a retaining wall built in the ground as an underground outer wall of the main structure, rainwater or spring water leaking from the retaining wall side acts on the main structure, affecting the durability of the main structure. In order to prevent this, a water stop structure is provided between the wall surface of the retaining wall and the adjacent elements of the retaining wall to prevent leakage of water from the retaining wall from acting on the main body structure.

このような土留壁からの漏水を防止する止水構造の一例として、例えば、土留壁の完成後に、土留壁の前面側の地盤を開削して土留壁の前面側を露出させ、この露出させた土留壁の前面側に防水シートを貼り付けることで、土留壁の壁面及び隣接するエレメント間からの漏水を防止するように構成した止水構造が知られている。   As an example of a water stop structure that prevents water leakage from such a retaining wall, for example, after completion of the retaining wall, the ground on the front side of the retaining wall is excavated to expose the front side of the retaining wall, and this exposed There is known a water stop structure configured to prevent water leakage from the wall surface of the retaining wall and between adjacent elements by attaching a waterproof sheet to the front surface side of the retaining wall.

また、他の例の止水構造として、特許文献１には、土留壁の隣接する一方の芯材のフランジの端部に雌継手を設け、他方の芯材のフランジの端部に雄継手を設け、一方の芯材の雌継手と他方の芯材の雌継手とを互いに係合させ、雌継手と雄継手との係合隙間に水膨張止水材を設け、水膨張止水材を水膨張させることにより雌継手と雄継手との間を止水し、土留壁からの漏水を防止するように構成した止水構造が開示されている。   As another example of the water stop structure, Patent Document 1 provides a female joint at the end of the flange of one core member adjacent to the retaining wall and a male joint at the end of the flange of the other core member. The female joint of one core member and the female joint of the other core member are engaged with each other, and a water expansion waterproofing material is provided in the engagement gap between the female joint and the male joint. A water-stop structure is disclosed that is configured to prevent water leakage from the earth retaining wall by stopping water between the female joint and the male joint by expanding.

さらに、他の例の止水構造として、特許文献２には、土留壁の隣接する一方の芯材のフランジの端部に係合手段を設け、他方の芯材のフランジの端部に係合手段を設け、一方の芯材の係合手段と他方の芯材の係合手段とを相互に係合させることで、隣接する芯材間を止水するように構成した止水構造が開示されている。
特開２００１−１６４５６３号公報 特開平１１−２００３６１号公報 Furthermore, as a water stop structure of another example, in Patent Document 2, an engagement means is provided at the end of the flange of one core member adjacent to the retaining wall, and is engaged with the end of the flange of the other core member. Disclosed is a water stop structure configured to stop water between adjacent core members by providing a means and engaging one core member engaging means and the other core member engaging means with each other. ing.
JP 2001-164563 A Japanese Patent Laid-Open No. 11-200361

ところで、上記のような各種の止水構造のうち、土留壁の前面側の地盤を開削して土留壁の前面側に防水シートを貼り付ける止水構造は、開削工事及び防水シートの貼付け工事に非常に手間がかかる。   By the way, among the various water stop structures as described above, the water stop structure for excavating the ground on the front side of the retaining wall and attaching the waterproof sheet to the front side of the retaining wall is suitable for excavation work and waterproof sheet attaching work. It takes a lot of work.

また、特許文献１に記載されている止水構造は、雌継手と雄継手との係合隙間の全体に水膨張止水材を充分に行き渡せることが困難な場合があり、そのような場合には雌継手と雄継手との係合部から漏水が生じることがある。また、芯材のフランジの端部に雌継手又は雄継手を設けて、雌継手と雄継手とを相互に係合させているため、土留壁として所定の強度を得るためには、芯材のフランジと雌継手又は雄継手との連結部の強度を高めなければならない。   Further, in the water stop structure described in Patent Document 1, it may be difficult to sufficiently distribute the water expansion water stop material over the entire engagement gap between the female joint and the male joint. In some cases, water leaks from the engaging portion between the female joint and the male joint. In addition, since a female joint or a male joint is provided at the end of the flange of the core material and the female joint and the male joint are engaged with each other, in order to obtain a predetermined strength as a retaining wall, The strength of the connection between the flange and the female or male joint must be increased.

さらに、特許文献２に記載されている止水構造は、隣接する一方の芯材のフランジの端部に設けた係合手段と、他方の芯材のフランジの端部に設けた係合手段とを相互に係合させているだけなので、両芯材間を完全に止水することができず、土留壁からの漏水の原因となる。さらに、隣接する一方の芯材の係合手段と他方の芯材の係合手段とを係合させる作業に非常に手間がかかる。   Furthermore, the water stop structure described in Patent Document 2 includes an engagement means provided at the end of the flange of one adjacent core member, and an engagement means provided at the end of the flange of the other core member. Are merely engaged with each other, water cannot be completely stopped between the two core members, which causes water leakage from the earth retaining wall. Furthermore, it takes a lot of work to engage the engaging means of one adjacent core material with the engaging means of the other core material.

本発明は、上記のような従来の問題に鑑みなされたものであって、土留壁の隣接するエレメント間を容易にかつ確実に止水することができる土留壁の止水構造及び止水構造の構築方法を提供することを目的とする。   The present invention has been made in view of the above-described conventional problems, and includes a water retaining structure for a retaining wall and a water retaining structure that can easily and reliably stop water between adjacent elements of the retaining wall. The purpose is to provide a construction method.

上記のような課題を解決するために、本発明は、以下のような手段を採用している。
すなわち、請求項１に係る発明は、芯材を備える複数のエレメントを横方向に並べてなる土留壁の隣接するエレメント間を止水する土留壁の止水構造であって、隣接する一方のエレメントの端部の芯材に取り付けられる一方の継手部材と、他方のエレメントの端部の芯材に取り付けられるとともに、前記一方の継手部材と相互に噛合する他方の継手部材と、前記一方の継手部材と前記他方の継手部材との噛合部分に介装されて、該噛合部分を水密にシールするシール部材とからなる止水手段を備えていることを特徴とする。 In order to solve the above problems, the present invention employs the following means.
That is, the invention according to claim 1 is a retaining wall water stop structure for stopping water between adjacent elements of the retaining wall in which a plurality of elements including a core material are arranged in a horizontal direction, One joint member attached to the end core member, the other joint member attached to the end core member of the other element and meshing with the one joint member, and the one joint member It is characterized by comprising water-stopping means comprising a sealing member interposed in a meshing portion with the other joint member and sealing the meshing portion in a watertight manner.

本発明による土留壁の止水構造によれば、止水手段の一方の継手部材と他方の継手部材とを相互に噛合させることにより、両継手部材の噛合部分にシール部材が介装され、シール部材によって両継手部材の噛合部分が水密にシールされることになる。
従って、一方のエレメントと他方のエレメントとを構築する際に、同時に両エレメント間の繋ぎ目を止水する止水構造も構築することができるので、止水構造の施工に要する手間、時間、及び費用を削減することができる。 According to the water retaining structure of the earth retaining wall according to the present invention, the seal member is interposed in the meshing portion of both joint members by engaging one joint member and the other joint member of the water stop means with each other. The meshing portions of both joint members are sealed in a watertight manner by the members.
Therefore, when constructing one element and the other element, it is also possible to construct a water-stop structure that stops the joint between both elements at the same time. Cost can be reduced.

請求項２に係る発明は、請求項１に記載の土留壁の止水構造であって、前記一方の継手部材には略コ形状の継手部が設けられ、前記他方の継手部材には前記継手部と相互に噛合する略コ形状の継手部が設けられ、前記両継手部の噛合部分に前記シール部材が介装されていることを特徴とする。   The invention according to claim 2 is the water retaining structure for the retaining wall according to claim 1, wherein the one joint member is provided with a substantially U-shaped joint portion, and the other joint member is provided with the joint. A substantially U-shaped joint portion that meshes with the joint portion is provided, and the seal member is interposed at a meshing portion of the both joint portions.

本発明による土留壁の止水構造によれば、一方の継手部材の略コ形状の継手部と他方の継手部材の略コ形状の継手部とが相互に噛合され、両継手部の噛合部分にシール部材が介装され、シール部材によって両継手部の噛合部分が水密にシールされることになる。
この場合、略コ形状の継手部と略コ形状の継手部とが相互に噛合しているので、土留壁の構築完了後に両継手部の噛合状態が解除されるようなことはなく、長期に亘って隣接するエレメント間の繋ぎ目を止水し続けることができる。 According to the water retaining structure of the earth retaining wall according to the present invention, the substantially U-shaped joint portion of one joint member and the substantially U-shaped joint portion of the other joint member are meshed with each other, and the meshed portions of both joint portions are engaged with each other. A seal member is interposed, and the meshing portions of both joint portions are sealed in a watertight manner by the seal member.
In this case, since the substantially U-shaped joint portion and the substantially U-shaped joint portion are engaged with each other, the engagement state of both the joint portions is not released after the construction of the earth retaining wall is completed. It is possible to continue to stop the joint between adjacent elements.

請求項３に係る発明は、請求項２に記載の土留壁の止水構造であって、前記シール部材は、水膨張ゴム弾性材からなり、前記両継手部の噛合部分に設けられたスペーサ部材によって変形方向が規制されていることを特徴とする。   The invention according to claim 3 is the water retaining structure for the retaining wall according to claim 2, wherein the seal member is made of a water-expandable rubber elastic material and is provided at a meshing portion of the joint portions. The deformation direction is regulated by the above.

本発明による土留壁の止水構造によれば、水膨張ゴム弾性材からなるシール部材は、両継手部の噛合部分に設けられたスペーサ部材によって変形方向が規制されることにより、両継手部の噛合部分にきつく充満され、両継手部の噛合部分が水密にシールされることになる。
従って、両継手部の噛合部分をシール部材によって確実にシールすることができることになり、両継手部の噛合部分が水路になるようなことはなく、隣接するエレメント間の繋ぎ目を確実に止水することができる。 According to the water retaining structure of the earth retaining wall according to the present invention, the seal member made of the water-expanded rubber elastic material is restricted in the deformation direction by the spacer member provided in the meshing portion of both joint portions, so that both joint portions The meshing portion is tightly filled, and the meshing portions of both joint portions are sealed in a watertight manner.
Therefore, the meshing part of both joint parts can be reliably sealed by the seal member, and the meshing part of both joint parts does not become a water channel, and the joint between adjacent elements is surely stopped. can do.

請求項４に係る発明は、請求項１から３の何れかに記載の土留壁の止水構造であって、前記一方のエレメント及び前記他方のエレメントの端部の芯材はＨ型鋼からなり、前記端部の芯材の一方のフランジに前記一方の継手部材及び前記他方の継手部材が取り付けられていることを特徴とする。   The invention according to claim 4 is the water retaining structure of the retaining wall according to any one of claims 1 to 3, wherein the core material of the end of the one element and the other element is made of H-shaped steel, The one joint member and the other joint member are attached to one flange of the core material at the end.

本発明による土留壁の止水構造によれば、土留壁の山側の面の隣接するエレメント間を止水手段によって止水すればよいことになるので、止水構造の施工に要する手間、時間、及び費用を削減することができる。   According to the water retaining structure of the retaining wall according to the present invention, it is only necessary to stop the water between the adjacent elements on the mountain side surface of the retaining wall by the water stopping means. And cost can be reduced.

請求項５に係る発明は、芯材を備える複数のエレメントを横方向に並べてなる土留壁の隣接するエレメント間を止水する土留壁の止水構造の構築方法であって、隣接する一方のエレメントの端部の芯材に一方の継手部材を取り付け、他方のエレメントの端部の芯材に他方の継手部材を取り付ける工程と、地盤に設けた一方のエレメント用の溝内に端部の芯材を含む複数の芯材を建て込み、該一方のエレメント用の溝の端部に端部の芯材を配置する工程と、端部の芯材に継手防護板を取り付け、この継手防護板によって一方の継手の周囲を包囲するとともに、継手防護板の外側に形成される空間内に砕石を充填する工程と、一方のエレメント用の溝内にコンクリートを打設する工程と、前記空間内から砕石及び継手防護板を取り除き、地盤に設けた他方のエレメント用の溝内に端部の芯材を含む複数の芯材を建て込み、該他方のエレメント用の溝の端部に端部の芯材を配置する工程と、前記他方のエレメント用の溝内にコンクリートを打設し、該コンクリートを該溝から一方のエレメントとの繋ぎ目に回り込ませる工程とを備え、複数のエレメントに対して前記一連の工程を繰り返し行うことにより、複数のエレメントを一体化した土留壁を構築し、隣接するエレメント間を止水することを特徴とする。   The invention according to claim 5 is a construction method of a water retaining structure for a retaining wall in which a plurality of elements including a core member are arranged in a lateral direction and water is stopped between adjacent elements of the retaining wall, and one adjacent element Attaching one joint member to the end core material of the other element, attaching the other joint member to the end core material of the other element, and the end core material in the groove for one element provided on the ground And mounting a joint guard plate on the end of the groove for the one element, and attaching a joint guard plate to the end core member. Surrounding the joint, and filling the crushed stone in a space formed outside the joint protection plate, placing concrete in the groove for one element, crushed stone and Remove the joint protection plate and place it on the ground. A step of building a plurality of core materials including an end core material in the groove for the other element and disposing the end core material at the end of the groove for the other element; By placing concrete in a groove for use and wrapping the concrete from the groove to a joint with one element, and repeating the series of steps for a plurality of elements, It is characterized by constructing a retaining wall with integrated elements and stopping water between adjacent elements.

以上、説明したように、本発明の土留壁の止水構造及び土留壁の止水構造の構築方法によれば、止水手段の一方の継手部材と他方の継手部材とを相互に噛合させることにより、両継手部材の噛合部分にシール部材が介装され、シール部材によって両継手部材の噛合部分が水密にシールされることになる。   As described above, according to the construction of the retaining wall water stop structure and the retaining wall water stop structure according to the present invention, one joint member and the other joint member of the water stopping means are engaged with each other. Thus, the seal member is interposed in the meshing part of both joint members, and the meshing part of both joint members is sealed in a watertight manner by the seal member.

従って、一方のエレメントと他方のエレメントとを構築する際に、同時に両エレメント間の繋ぎ目を止水する止水構造も構築することができるので、土留壁の構築完了後に改めて隣接するエレメント間の繋ぎ目の止水構造を構築する必要はなく、止水構造の施工に要する手間、時間、及び費用を削減することができる。   Therefore, when constructing one element and the other element, it is also possible to construct a water-stop structure that shuts off the joint between the two elements at the same time. There is no need to construct a water stop structure at the joint, and it is possible to reduce labor, time and cost required for construction of the water stop structure.

また、一方の継手部材の略コ形状の継手部と他方の継手部材の略コ形状の継手部とが相互に噛合されているので、土留壁の構築完了後に両継手部の噛合状態が解除されるようなことはなく、長期に亘って隣接するエレメント間の繋ぎ目を止水し続けることができる。   Further, since the substantially U-shaped joint portion of one joint member and the substantially U-shaped joint portion of the other joint member are engaged with each other, the engagement state of both the joint portions is released after the construction of the earth retaining wall is completed. There is no such a thing, and the joint between the adjacent elements can be kept still for a long time.

さらに、水膨張ゴム弾性材からなるシール部材は、両継手部の噛合部分に設けられたスペーサ部材によって変形方向が規制されているので、水分を吸収することによって両継手部の噛合部分にシール部材をきつく充満させることができ、両継手部の噛合部分を確実にシールすることができ、両継手部が水路になるのを防止できる。   Further, since the deformation direction of the seal member made of the water-expanded rubber elastic material is regulated by the spacer member provided at the meshing portion of both joint portions, the seal member is provided at the meshing portion of both joint portions by absorbing moisture. Can be tightly filled, the meshing portions of both joint portions can be reliably sealed, and both joint portions can be prevented from becoming water channels.

さらに、土留壁の山側の面の隣接するエレメント間を止水手段によって止水すればよいので、施工に要する手間、時間、及び費用を削減することができる。   Furthermore, since it is only necessary to stop water between the adjacent elements on the mountain side surface of the retaining wall with water stopping means, it is possible to reduce labor, time and cost required for construction.

以下、図面を参照しながら本発明の実施の形態について説明する。
図１〜図６には、本発明による土留壁の止水構造及び止水構造の構築方法の一実施の形態が示されていて、図１は土留壁の止水構造の全体を示す概略図、図２〜図６は止水構造の構築方法を示す説明図である。
なお、本実施の形態においては、土留壁が地中連続壁の場合について説明しているが、ＳＭＷ連続壁に適用することもできる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show an embodiment of a water retaining structure for a retaining wall and a method for constructing the water retaining structure according to the present invention, and FIG. 1 is a schematic diagram showing the entire water retaining structure for a retaining wall. 2-6 is explanatory drawing which shows the construction method of a water stop structure.
In the present embodiment, the case where the retaining wall is an underground continuous wall is described, but the present invention can also be applied to an SMW continuous wall.

本実施の形態に示す地中連続壁１の止水構造７は、図１に示すように、地中連続壁１を本体構造物の地下外壁等として利用する際に適用され、地中連続壁１を構成する隣接するエレメント２、２間を止水し、隣接するエレメント２、２間からの漏水が本体構造物に作用するのを阻止するのに有効なものであって、地中連続壁１の隣接するエレメント２間を止水する止水手段１０を備えている。   The water stop structure 7 of the underground continuous wall 1 shown in the present embodiment is applied when the underground continuous wall 1 is used as an underground outer wall or the like of the main body structure as shown in FIG. A continuous underground wall that is effective in stopping water between adjacent elements 2 and 2 constituting 1 and preventing leakage of water from between adjacent elements 2 and 2 on the main body structure. 1 is provided with water stopping means 10 for stopping water between adjacent elements 2.

地中連続壁１は、例えば、地盤４５に平面視長方形状の溝４６を所定の深さで掘削し、この溝４６内に複数の鋼製の芯材３を所定の間隔ごとに建て込み、溝４６内にトレミー管を用いて充填材としてのコンクリート４１を打設することにより溝４６の形状に合致した壁体状のエレメント２を構築し、このようなエレメント２を地盤４５に連続して複数構築し、隣接するエレメント２、２間の繋ぎ目にコンクリート４１を打設して、隣接するエレメント２、２間を一体連結して構成しており、この地中連続壁１を本体構造物の地下外壁等として利用している。   The underground continuous wall 1 is formed by, for example, excavating a rectangular groove 46 in plan view in the ground 45 at a predetermined depth, and installing a plurality of steel cores 3 in the groove 46 at predetermined intervals. By placing concrete 41 as a filling material in the groove 46 using a treme tube, a wall-like element 2 conforming to the shape of the groove 46 is constructed, and such an element 2 is continuously connected to the ground 45. A plurality of structures are constructed, and concrete 41 is placed at the joint between the adjacent elements 2 and 2 so that the adjacent elements 2 and 2 are integrally connected. It is used as an underground outer wall.

本実施の形態においては、図１及び図６に示すように、地中連続壁１の各エレメント２を構成する芯材３にＨ型鋼を用い、各芯材３のフランジ４の表面４ａがエレメント２の壁面２ａに沿い、リブ５がエレメント２の壁面２ａと直交するように、複数の芯材３を各エレメント２の内部に所定の間隔ごとに埋設している。   In the present embodiment, as shown in FIGS. 1 and 6, H-shaped steel is used for the core material 3 constituting each element 2 of the underground continuous wall 1, and the surface 4a of the flange 4 of each core material 3 is an element. A plurality of core members 3 are embedded in each element 2 at predetermined intervals so that the rib 5 is orthogonal to the wall surface 2a of the element 2 along the wall surface 2a.

止水手段１０は、地中連続壁１の本体構造物とは反対側（山側）の面の隣接するエレメント２、２間に設けられ、一方のエレメント２ｂ（先行エレメント）の端部の芯材３ａに取り付けられる一方の継手部材１１と、他方のエレメント２ｃ（後行エレメント）の端部の芯材３ｂに取り付けられるとともに、一方の継手部材１１と相互に噛合する他方の継手部材１５と、一方の継手部材１１と他方の継手部材１５との噛合部分に介装される継手部シール部材２０とを備えている。   The water stop means 10 is provided between the adjacent elements 2 and 2 on the surface (mountain side) opposite to the main body structure of the underground continuous wall 1, and is a core material at the end of one element 2b (preceding element). One joint member 11 attached to 3a, the other joint member 15 attached to the core member 3b at the end of the other element 2c (following element), and meshed with one joint member 11, The joint member 11 and the other joint member 15 are provided with a joint part seal member 20 interposed in a meshing portion.

一方の継手部材１１は、図２に示すように、端部の芯材３ａと同一長さの長方形状の鋼板を幅方向の略中央部から二つ折りに折り曲げて全体を略コ形状に形成するとともに、幅方向の一端部を更に略直角に折り曲げてその部分を略Ｌ形状に形成したものであって、略コ形成の部分によって継手部１２が構成され、略Ｌ形状の部分によって取付け部１３が構成されている。   As shown in FIG. 2, one joint member 11 is formed in a substantially U shape by folding a rectangular steel plate having the same length as the core material 3 a at the end portion in half from the substantially central portion in the width direction. In addition, one end portion in the width direction is further bent at a substantially right angle to form that portion in a substantially L shape. The joint portion 12 is constituted by a substantially U-shaped portion, and the attachment portion 13 is constituted by the substantially L-shaped portion. Is configured.

一方の継手部材１１は、略コ形状の継手部１２の開口部が内側（一方のエレメント２ｂの内部方向）を向くように、かつ、継手部１２の表面１２ａが端部の芯材３ａのフランジ４の表面４ａと略平行となるように、取付け部１３が一方のエレメント２ｂの端部の芯材３ａのフランジ４の側部４ｂに溶接により一体に連結されている。   One joint member 11 is formed so that the opening of the substantially U-shaped joint part 12 faces inward (inner direction of one element 2b), and the surface 12a of the joint part 12 is the flange of the core 3a at the end. The mounting portion 13 is integrally connected to the side portion 4b of the flange 4 of the core member 3a at the end of one element 2b by welding so as to be substantially parallel to the surface 4a of the four.

一方の継手部材１１の継手部１２の表面には、一方の継手部材１１と同一長さの２つの丸棒状のスペーサ部材１４が所定の間隔をおいて溶接により一体に連結され、このスペーサ部材１４によって一方の継手部材１１の継手部１２と後述する他方の継手部材１５の継手部１６との噛合をスムーズにするとともに、両継手部１２、１６間にガタが生じるのが防止される。   Two round bar-shaped spacer members 14 having the same length as the one joint member 11 are integrally connected to the surface of the joint portion 12 of the one joint member 11 by welding at a predetermined interval. As a result, the joint portion 12 of one joint member 11 and the joint portion 16 of the other joint member 15 described later can be smoothly meshed, and play between the joint portions 12 and 16 can be prevented.

端部の芯材３ａの両フランジ４にはＥＶＡ樹脂等からなるシート状の側部シール部材２２が取り付けられ、この側部シール部材２２により、一方の継手部材１１の継手部１２と後述する他方の継手部材１５の継手部１６との噛合が完了するまでの間、継手部材１１の周囲にコンクリート４１、砕石４０等が回り込むのが防止される。   A sheet-like side seal member 22 made of EVA resin or the like is attached to both flanges 4 of the end core member 3a, and the side seal member 22 allows the joint portion 12 of one joint member 11 and the other to be described later. Until the engagement of the joint member 15 with the joint portion 16 is completed, the concrete 41, the crushed stone 40, and the like are prevented from wrapping around the joint member 11.

なお、図１及び図６に示すように、側部シール部材２２は、一方の継手部材１１の継手部１２と他方の継手部材１５の継手部１６との噛合が完了した後に、一方のエレメント２ｂと他方のエレメント２ｃとの繋ぎ目に打設されるコンクリート４１内に埋設されることになる。   As shown in FIGS. 1 and 6, the side seal member 22 has one element 2b after the engagement between the joint portion 12 of one joint member 11 and the joint portion 16 of the other joint member 15 is completed. And embedded in the concrete 41 placed at the joint between the other element 2c.

他方の継手部材１５は、図２に示すように、一方の継手部材１１と同様に、端部の芯材３ｂと同一長さの長方形状の鋼板を幅方向の略中央部から二つ折りに折り曲げて全体を略コ形状に形成するとともに、幅方向の一端部を更に略直角に折り曲げてその部分を略Ｌ形状に形成したものであって、略コ形成の部分によって継手部１６が構成され、略Ｌ形状の部分によって取付け部１７が構成されている。   As shown in FIG. 2, the other joint member 15 is formed by bending a rectangular steel plate having the same length as the core material 3 b at the end into a double fold from the substantially central portion in the width direction, as with the one joint member 11. The entire portion is formed in a substantially U shape, and one end portion in the width direction is further bent at a substantially right angle to form the portion in a substantially L shape, and the joint portion 16 is configured by the substantially U-shaped portion, The attachment portion 17 is constituted by a substantially L-shaped portion.

他方の継手部材１５は、略コ形状の継手部１６の開口部が外側（他方のエレメント２ｃの外部方向）を向くように、かつ、継手部１６の表面１６ａが端部の芯材３ｂのフランジ４の表面４ａと略平行となるように、取付け部１７が他方のエレメント２ｃの端部の芯材３ｂのフランジ４の側部４ｂに溶接により一体に連結されている。   The other joint member 15 is formed so that the opening of the substantially U-shaped joint portion 16 faces the outside (the outside direction of the other element 2c), and the surface 16a of the joint portion 16 is the flange of the core 3b at the end. The mounting portion 17 is integrally connected to the side portion 4b of the flange 4 of the core member 3b at the end portion of the other element 2c by welding so as to be substantially parallel to the surface 4a of the fourth element 4c.

他方の継手部材１５の継手部１６の表面１６ａには、他方の継手部材１５と同一長さの２つの丸棒状のスペーサ部材１４が所定の間隔をおいて溶接により一体に連結され、このスペーサ部材１４によって他方の継手部材１５の継手部１６と一方の継手部材１１の継手部１２との噛合をスムーズにするとともに、両継手部１２、１６間にガタが生じるのが防止される。   Two spacer members 14 having the same length as the other joint member 15 are integrally connected to the surface 16a of the joint portion 16 of the other joint member 15 by welding at a predetermined interval. 14 smoothens the engagement between the joint portion 16 of the other joint member 15 and the joint portion 12 of the one joint member 11, and prevents play between the joint portions 12, 16.

継手部シール部材２０は、図２に示すように、水膨張ゴム弾性材からなる帯板状をなすものであって、他方の継手部材１５の継手部１６の２つのスペーサ部材１４間に貼着され、一方の継手部材１１の継手部１２と他方の継手部材１５の継手部１６とを相互に噛合させることにより、両継手部１２、１６間に全長に亘って介装される。   As shown in FIG. 2, the joint seal member 20 has a band plate shape made of a water expansion rubber elastic material, and is attached between the two spacer members 14 of the joint part 16 of the other joint member 15. Then, the joint portion 12 of one joint member 11 and the joint portion 16 of the other joint member 15 are engaged with each other, so that the joint portions 12 and 16 are interposed over the entire length.

継手部シール部材２０は、地中連続壁１の山側の面に作用する雨水や湧水等の水を吸収して膨張することにより両継手部１２、１６間を水密にシールし、隣接する一方のエレメント２ｂと他方のエレメント２ｃとの繋ぎ目から本体構造物側への漏水を防止する。   The joint part seal member 20 seals between the joint parts 12 and 16 in a watertight manner by absorbing and expanding water such as rain water and spring water acting on the mountain side surface of the underground continuous wall 1, and adjacent one side. Water leakage from the joint between the element 2b and the other element 2c to the main body structure side is prevented.

継手部シール部材２０は、２つのスペーサ部材１４によって幅方向への変形が規制され、主として厚み方向に変形することになるので、両継手部１２、１６間にきつく充満されることになり、両継手部１２、１６間が確実にシールされることになる。
なお、本実施の形態においては、継手部シール部材２０にアデカウルトラシール（商品名：株式会社ＡＤＥＫＡ）を使用しているが、これに限定することなく、水膨張する性質を有する弾性体であれば使用することができる。 The joint seal member 20 is restricted in deformation in the width direction by the two spacer members 14 and is mainly deformed in the thickness direction, so that the joint parts 12 and 16 are tightly filled. The joints 12 and 16 are surely sealed.
In the present embodiment, an ADEKA ultra seal (trade name: ADEKA Co., Ltd.) is used for the joint seal member 20, but the present invention is not limited to this, and any elastic body having the property of water expansion can be used. Can be used.

そして、上記のような構成の止水手段１０によって隣接する一方のエレメント２ｂと他方のエレメント２ｃとの間の繋ぎ目が止水され、山側から地中連続壁１に作用する雨水、湧水等の水が両エレメント２ｂ、２ｃ間の繋ぎ目から本体構造物側に漏れるのが防止される。   And the joint between one element 2b and the other element 2c which adjoined by the water stop means 10 of the above structures is water-stopped, rain water, spring water, etc. which act on the underground continuous wall 1 from the mountain side Is prevented from leaking from the joint between the elements 2b and 2c to the main body structure side.

次に、上記のように構成した土留壁１の止水構造７の構築方法について説明する。
まず、図２に示すように、一方のエレメント２ｂの端部の芯材３ａの一方のフランジ４の側部４ｂに一方の継手部材１１の取付け部１３を溶接により一体に連結し、他方のエレメント２ｃの端部の芯材３ｂの一方のフランジ４の側部４ｂに他方の継手部材１５の取付け部１７を溶接により一体に連結する。 Next, the construction method of the water stop structure 7 of the retaining wall 1 configured as described above will be described.
First, as shown in FIG. 2, an attachment portion 13 of one joint member 11 is integrally connected to a side portion 4b of one flange 4 of a core member 3a at an end portion of one element 2b by welding, and the other element The attachment portion 17 of the other joint member 15 is integrally connected to the side portion 4b of one flange 4 of the core member 3b at the end of 2c by welding.

次に、一方のエレメント２ｂの端部の芯材３ａの両フランジ４の表面の中央部に、フランジ４の全長に亘る長さの平鋼からなる支持板２１を、その板面がフランジ４の表面４ａに対して直交するように溶接により一体に連結し、この支持板２１の一方の板面のフランジ４側の縁部にフランジ４の全長に亘る長さの水膨張ゴム弾性材からなる接合部シール部材２３を貼着し、この接合部シール部材２３によって支持板２１とフランジ３との接合部をフランジ３の全長に亘ってシールする。   Next, a support plate 21 made of flat steel having a length over the entire length of the flange 4 is provided at the center of the surface of both flanges 4 of the core 3a at the end of one element 2b. Joined integrally by welding so as to be orthogonal to the surface 4a, and made of a water-swelling rubber elastic material having a length over the entire length of the flange 4 at the flange 4 side edge of one plate surface of the support plate 21 The part seal member 23 is attached, and the joint part between the support plate 21 and the flange 3 is sealed over the entire length of the flange 3 by the joint part seal member 23.

なお、本実施の形態においては、接合部シール部材２３にアデカウルトラシール（商品名：株式会社ＡＤＥＫＡ）を使用している。   In the present embodiment, an ADEKA ultra seal (trade name: ADEKA Co., Ltd.) is used for the joint seal member 23.

次に、各支持板２１の一方の板面のフランジ４と反対側の縁部に側部シール部材２２を取り付け、２つの側部シール部材２２間に端部の芯材３ａの右半部、一方の継手部材１１、及び後述する中央部ガイド２９を位置させる。   Next, the side seal member 22 is attached to the edge of the support plate 21 opposite to the flange 4 on the opposite side of the flange 4, the right half of the end core member 3 a between the two side seal members 22, One joint member 11 and a center guide 29 described later are positioned.

側部シール部材２２は、ＥＶＡ樹脂等からなるシート状をなすものであって、端部の芯材３ａの全長に亘る長さに形成されるとともに、一方の継手部材１１の全体を外方から所定の間隔をおいて覆う幅に形成されている。   The side seal member 22 has a sheet shape made of EVA resin or the like, and is formed to have a length that extends over the entire length of the core material 3a at the end, and the entire one joint member 11 from the outside. It is formed in a width that covers a predetermined interval.

側部シール部材２２は、幅方向の一端部の縁部を支持板２１の縁部（フランジ４と反対側の縁部）に重合させ、この状態で一端部の縁部の上部に平鋼からなる押え板２４を重合させ、押え板２４の外側から押え板２４、側部シール部材２２の縁部、及び支持板２１にボルト２５を貫通させ、ボルト２５にナット２６を螺合させて締め付けることにより、支持板２１に取り付けられる。   The side seal member 22 superimposes the edge of one end in the width direction on the edge of the support plate 21 (the edge on the side opposite to the flange 4), and in this state, flat steel is formed on the upper edge of the one end. The presser plate 24 is superposed, bolts 25 are passed through the presser plate 24, the edge of the side seal member 22 and the support plate 21 from the outside of the presser plate 24, and nuts 26 are screwed into the bolts 25 and tightened. Is attached to the support plate 21.

次に、端部の芯材３ａの両フランジ４の表面４ａの中央部よりも右側寄りの部分に、端部の芯材３ａの全長に亘る長さのＬ型鋼からなる側部ガイド２７を配置し、この側部ガイド２７の一端部を溶接によりフランジ４の表面４ａに一体に連結し、側部ガイド２７とフランジ４の表面４ａとの間に後述する継手防護板３１を支持する溝２８を形成する。   Next, a side guide 27 made of L-shaped steel having a length over the entire length of the end core member 3a is arranged in a portion closer to the right side than the center portion of the surface 4a of both flanges 4 of the end core member 3a. Then, one end of the side guide 27 is integrally connected to the surface 4a of the flange 4 by welding, and a groove 28 for supporting a joint protection plate 31 described later is provided between the side guide 27 and the surface 4a of the flange 4. Form.

次に、端部の芯材３ａのリブ５の中央部に、端部の芯材３ａの全長に亘る長さの一対のＬ型鋼からなる中央部ガイド２９を所定の間隔をおいて対向配置し、両中央部ガイド２９の一端部をリブ５の表面５ａに溶接により一体に連結し、両中央部ガイド２９間とリブ５の表面５ａとの間に後述するＨ型鋼からなる支柱３２のフランジ３３を支持する溝３０を形成する。   Next, a center portion guide 29 made of a pair of L-shaped steels having a length extending over the entire length of the end core member 3a is disposed opposite to the center portion of the rib 5 of the end core member 3a at a predetermined interval. Further, one end portions of both center guides 29 are integrally connected to the surface 5a of the rib 5 by welding, and the flange 33 of the column 32 made of H-shaped steel, which will be described later, between both the center guides 29 and the surface 5a of the rib 5. The groove 30 for supporting the is formed.

次に、図３に示すように、端部の芯材３ａの全長に亘る長さの鋼板をコ形状に折り曲げて形成した継手防護板３１の両端部を両側部ガイド２７の溝２８内に挿入し、継手防護板３１の内面側の中央部に溶接により一体に取り付けたＨ型鋼からなる支柱３２のフランジ３３を中央部ガイド２９の溝３０内に挿入し、継手防護板３１の内面側で一方の継手部材１１の周囲を包囲する。   Next, as shown in FIG. 3, both ends of the joint protection plate 31 formed by bending a steel plate having a length over the entire length of the core 3 a at the end into a U shape are inserted into the grooves 28 of the side guides 27. Then, the flange 33 of the support column 32 made of H-shaped steel integrally attached by welding to the central portion on the inner surface side of the joint protection plate 31 is inserted into the groove 30 of the central guide 29, and on the inner surface side of the joint protection plate 31, The joint member 11 is surrounded.

そして、上記のような端部の芯材３ａに対する作業が完了した後に、地盤４５に設けた一方のエレメント用の溝４６ａ内に複数の芯材３（端部の芯材３ａを含む）を所定の間隔ごとに建て込み、端部の芯材３ａを一方のエレメント用の溝４６ａの端部に配置し、端部の芯材３ａの両側部シール部材２２の先端を一方のエレメント用の溝４６ａの内面に当接させ、溝４６ａの内面と両側部シール部材２２の内面と継手防護板３１の外面とによって囲まれる部分に空間３４を形成し、図４に示すように、空間３４内に砕石４０を投入して充填する。   Then, after the work on the end core material 3a as described above is completed, a plurality of core materials 3 (including the end core material 3a) are predetermined in the groove 46a for one element provided in the ground 45. The core material 3a at the end is disposed at the end of the groove 46a for one element, and the ends of the both side seal members 22 of the core material 3a at the end are grooved 46a for one element. A space 34 is formed in a portion surrounded by the inner surface of the groove 46a, the inner surfaces of the seal members 22 on both sides, and the outer surface of the joint protection plate 31, and as shown in FIG. Charge 40 and fill.

そして、空間３４内に砕石４０を充填した状態で一方のエレメント用の溝４６ａ内にトレミー管によって充填材としてのコンクリート４１を打設し、コンクリート４１内に複数の芯材３（端部の芯材３ａを含む）が所定の間隔ごとに埋設された壁体状の一方のエレメント２ｂを構築する。   Then, in a state where the crushed stone 40 is filled in the space 34, concrete 41 as a filler is placed by a treme tube in one of the grooves 46 a for one element, and a plurality of cores 3 (cores at the ends are placed in the concrete 41. One element 2b in the shape of a wall body in which the material 3a is embedded at a predetermined interval is constructed.

次に、図５に示すように、空間３４内に充填した砕石４０を取り除き、端部の芯材３ａから継手防護板３１を取り外し、地盤４５に設けた他方のエレメント用の溝４６ｂ内に複数の芯材３（端部の芯材３ｂを含む）を所定の間隔ごとに建て込み、端部の芯材３ｂを他方のエレメント用の溝４６ｂの端部に配置する。   Next, as shown in FIG. 5, the crushed stone 40 filled in the space 34 is removed, the joint protection plate 31 is removed from the core material 3 a at the end, and a plurality of elements are provided in the groove 46 b for the other element provided in the ground 45. The core material 3 (including the end core material 3b) is built at predetermined intervals, and the end core material 3b is disposed at the end of the other element groove 46b.

この際に、端部の芯材３ｂの他方の継手部材１５の継手部１６を一方のエレメント２ｂの一方の継手部材１１の継手部１２に上方から噛合させ、両継手部１２、１６間に継手部シール部材２０を介装させる。   At this time, the joint portion 16 of the other joint member 15 of the core member 3b at the end portion is engaged with the joint portion 12 of the one joint member 11 of the one element 2b from above, and the joint portion between the joint portions 12 and 16 is joined. The part seal member 20 is interposed.

この場合、両継手部１２、１６には、それぞれ２つのスペーサ部材１４が設けられているので、これらのスペーサ部材１４によって両継手部１２、１６がスムーズに噛合されるとともに、噛合後に両継手部１２、１６間にガタが生じるのが防止される。   In this case, since the two joint members 12 and 16 are provided with the two spacer members 14, respectively, the joint members 12 and 16 are smoothly meshed by these spacer members 14, and both the joint portions are engaged after meshing. It is possible to prevent the backlash between 12 and 16 from occurring.

また、両継手部１２、１６には、一方のエレメント２ｂ及び他方エレメント２ｃの壁面２ａ方向に多少の遊びを有しているので、一方のエレメント用の溝４６ａ、他方のエレメント用の溝４６ｂ等の寸法に多少の誤差があっても、両継手部１２、１６を容易にかつ確実に噛合させることができる。   Moreover, since both joint parts 12 and 16 have some play in the direction of the wall surface 2a of one element 2b and the other element 2c, the groove 46a for one element, the groove 46b for the other element, etc. Even if there is some error in the dimensions, both joint portions 12 and 16 can be easily and reliably engaged.

そして、図６に示すように、他方のエレメント用の溝４６ｂ内にトレミー管によって充填材としてのコンクリート４１を打設し、そのコンクリート４１を他方のエレメント用の溝４６ｂから砕石４０を取り除いた後の空間３４内に回り込ませる。   Then, as shown in FIG. 6, after concrete 41 as a filler is placed by a treme tube in the groove 46b for the other element, and the concrete 41 is removed from the groove 46b for the other element, the crushed stone 40 is removed. It wraps around in the space 34.

このようにして、コンクリート４１内に複数の芯材３(端部の芯材３ｂを含む)が所定の間隔ごとに埋設された壁体状の他方のエレメント３ｂを構築するとともに、一方のエレメント２ｂと他方のエレメント２ｃとをそれらの間に打設したコンクリート４１を介して一体に連結する。   In this way, while constructing the other element 3b in the shape of a wall in which a plurality of core members 3 (including the end core member 3b) are embedded in the concrete 41 at predetermined intervals, one element 2b And the other element 2c are connected together through concrete 41 placed between them.

そして、上記のような一連の作業を複数のエレメント２に対して繰り返し行うことにより、複数のエレメント２を一体化した地中連続壁１を構築することができ、地中連続壁１の隣接するエレメント２間の繋ぎ目に一方の継手部材１１、他方の継手部材１５、及び継手部シール部材２０からなる止水手段１０を介装させることができ、この止水手段１０によって隣接するエレメント２間を止水することができる。   Then, by repeating the above-described series of operations for the plurality of elements 2, the underground continuous wall 1 in which the plurality of elements 2 are integrated can be constructed and adjacent to the underground continuous wall 1. A water stop means 10 including one joint member 11, the other joint member 15, and the joint portion seal member 20 can be interposed at the joint between the elements 2, and the adjacent water elements 10 can be interposed between the water stop means 10. Can be stopped.

なお、地中連続壁１の高さが芯材３の規定長さを超える場合には、図7及び図８に示すように、複数の芯材３を上下方向に繋ぎ合わせるとともに、複数の一方の継手部材１１を上下方向に繋ぎ合せる。この場合、上下方向に隣接する一方の継手部材１１、１１間に水膨張ゴム弾性材からなる繋ぎ目用シール部材３５を介装させ、上側の一方の継手部材１１の下端部及び下側の一方の継手部材１１の上端部にそれぞれ環状のガイド部３６を一体に設け、この上下のガイド部３６、３６間に丸棒を略Ｌ型状に屈曲させて構成した連結棒３７を挿着させる。
なお、図７及び図８においては、一方の継手部材１１のみを示しているが、他方の継手部材１５も同様の方法によって繋ぎ合せる。 In addition, when the height of the underground continuous wall 1 exceeds the specified length of the core material 3, as shown in FIG.7 and FIG.8, while connecting the some core material 3 to an up-down direction, a plurality of one side The joint members 11 are connected in the vertical direction. In this case, a joint seal member 35 made of a water expansion rubber elastic material is interposed between one joint member 11, 11 adjacent in the vertical direction, and one of the lower end portion and the lower side of the upper joint member 11. An annular guide portion 36 is integrally provided at the upper end portion of the joint member 11, and a connecting rod 37 formed by bending a round bar into a substantially L shape is inserted between the upper and lower guide portions 36, 36.
7 and 8, only one joint member 11 is shown, but the other joint member 15 is also joined by the same method.

また、図９及び図１０に示すように、本体構造物の底盤部５０と地中連続壁１との間を完全に止水するために、地中連続壁１の本体構造物の底盤部５０に対応する部分に防水シート３８を貼り付け、この防水シート３８を底盤部５０の表面に敷設した防水シート３９に接合するようにしてもよい。   Moreover, as shown in FIG.9 and FIG.10, in order to completely stop water between the bottom board part 50 of a main body structure, and the underground continuous wall 1, the bottom board part 50 of the main body structure of the underground continuous wall 1 is shown. The waterproof sheet 38 may be affixed to the portion corresponding to, and the waterproof sheet 38 may be joined to the waterproof sheet 39 laid on the surface of the bottom panel 50.

具体的には、地中連続壁１の前面側を砕石均し深さまで開削し、本体構造物の底盤部５０に対応する地中連続壁１の前面側を削って芯材３のフランジ４の表面４ａを露出させ、この状態で地中連続壁１の前面側の本体構造物の底盤部５０に対応する部分の全体に防水シート３８を貼り付ける。この場合、防水シート３８の上端部を糊付けせずに折り曲げておく。また、この際に、防止シート３８を地中連続壁１の前面側に確実に接合するために、地中連続壁１の前面側をモルタルによって平滑に仕上る。   Specifically, the front side of the underground continuous wall 1 is cut to the level of crushed stone, and the front side of the underground continuous wall 1 corresponding to the bottom board portion 50 of the main body structure is cut to remove the flange 4 of the core material 3. The surface 4a is exposed, and in this state, the waterproof sheet 38 is affixed to the entire portion corresponding to the bottom plate portion 50 of the main body structure on the front surface side of the underground continuous wall 1. In this case, the upper end portion of the waterproof sheet 38 is bent without being glued. At this time, in order to securely join the prevention sheet 38 to the front surface side of the underground continuous wall 1, the front surface side of the underground continuous wall 1 is smoothly finished with mortar.

そして、この状態で砕石５５を所定の厚さで敷設し、砕石５５の上部に捨てコンクリート５６を所定の厚さで打設して底盤部５０を構築し、底盤部５０の表面に防水シート３９を敷設し、この防水シート３９に地中連続壁１側の防水シート３８の上端部を重ね合わせて接合する。   Then, in this state, the crushed stone 55 is laid with a predetermined thickness, the discarded concrete 56 is cast on the crushed stone 55 with a predetermined thickness, and the bottom board portion 50 is constructed. The upper end portion of the waterproof sheet 38 on the underground continuous wall 1 side is overlapped and joined to the waterproof sheet 39.

上記のように構成した本実施の形態による土留壁１の止水構造７及び止水構造７の構築方法にあっては、地中連続壁１の隣接するエレメント２、２間に一方の継手部材１１と他方の継手部材１５と継手部シール部材２０とからなる止水手段１０を設け、止水手段１０の一方の継手部材１１の継手部１２と他方の継手部材１５の継手部１６とを相互に噛合させて、両継手部１２、１６間に継手部シール部材２０を介装させるように構成したので、隣接するエレメント２間の繋ぎ目を確実に止水することができ、山側からの水が繋ぎ目を介して本体構造物側に漏れ出るのを確実に防止できる。   In the water stop structure 7 of the earth retaining wall 1 and the construction method of the water stop structure 7 according to the present embodiment configured as described above, one joint member is provided between the adjacent elements 2 and 2 of the underground continuous wall 1. 11, the other joint member 15, and the joint seal member 20 are provided. The joint part 12 of one joint member 11 of the water stop means 10 and the joint part 16 of the other joint member 15 are connected to each other. Since the joint seal member 20 is interposed between the joint parts 12 and 16, the joint between the adjacent elements 2 can be surely stopped, and water from the mountain side can be stopped. Can be reliably prevented from leaking to the main body structure side through the joint.

また、一方の継手部材１１の継手部１２と他方の継手部材１５の継手部１６とを相互に噛合させる際に、両継手部１２、１６に設けたスペーサ部材１４によって両継手部１２、１６をスムーズに噛合させることができるとともに、噛合後に両継手部材１２、１６間にガタが生じるのを防止できることになる。   Further, when the joint portion 12 of one joint member 11 and the joint portion 16 of the other joint member 15 are engaged with each other, the joint portions 12 and 16 are connected to each other by the spacer member 14 provided in the joint portions 12 and 16. In addition to being able to engage smoothly, it is possible to prevent backlash between the joint members 12 and 16 after engagement.

さらに、一方の継手部材１１の継手部１２及び他方の継手部材１５の継手部１６は共に略コ形状に形成されているので、噛合完了後に両継手部１２、１６の噛合状態が解除されるようなことはなく、長期に亘って隣接するエレメント２の繋ぎ目を止水し続けることができる。   Furthermore, since the joint part 12 of the one joint member 11 and the joint part 16 of the other joint member 15 are both formed in a substantially U shape, the meshing state of the joint parts 12 and 16 is released after the meshing is completed. There is nothing, and the joint of the adjacent elements 2 can continue to be stopped for a long time.

さらに、両継手部１２、１６は、一方のエレメント２ｂ及び他方のエレメント２ｃの壁面２ａ方向に多少の遊びを有しているので、一方のエレメント用の溝４６ａ、他方のエレメント用の溝４６ｂ等の寸法に多少の誤差が生じても、両継手部１２、１６同士の噛合作業を容易にかつ確実に行うことができる。   Furthermore, since both joint parts 12 and 16 have some play in the wall surface 2a direction of one element 2b and the other element 2c, the groove 46a for one element, the groove 46b for the other element, etc. Even if some errors occur in the dimensions, the jointing operation between the joint portions 12 and 16 can be performed easily and reliably.

さらに、隣接するエレメント２の山側の面のみに止水手段１０を設ければよいので、止水手段の取付け作業に要する手間、及び費用を削減することができるとともに、工期を短縮することもできる。   Furthermore, since it is only necessary to provide the water stop means 10 only on the surface of the adjacent element 2 on the mountain side, it is possible to reduce the labor and cost required for the work of attaching the water stop means and also to shorten the construction period. .

さらに、地中連続壁１の構築が完了した後に、地中連続壁１の本体構造物側の地盤４５´を開削する際に、地中連続壁１の隣接するエレメント２間の繋ぎ目に防水シート等を貼付ける止水工事が不要となるので、これによっても工費を削減できるとともに、工期を短縮することができる。   Furthermore, after the construction of the underground continuous wall 1 is completed, when excavating the ground 45 ′ on the main body structure side of the underground continuous wall 1, the joint between the adjacent elements 2 of the underground continuous wall 1 is waterproofed. Since the water stop work which sticks a sheet | seat etc. becomes unnecessary, a construction cost can be reduced also by this, and a construction period can be shortened.

なお、本実施の形態においては、土留壁１が地中連続壁１の場合について説明したが、土留壁１がＳＭＷ壁、ＳＭＷ連続壁の場合にも適用可能であり、その場合にも同様の作用効果を奏する。ＳＭＷ壁又はＳＭＷ連続壁に適用する場合には、ソイルセメント壁体がエレメントに相当することになる。   Although the case where the retaining wall 1 is the underground continuous wall 1 has been described in the present embodiment, the present invention can be applied to the case where the retaining wall 1 is an SMW wall or an SMW continuous wall. Has an effect. When applied to the SMW wall or SMW continuous wall, the soil cement wall body corresponds to the element.

なお、前記の説明においては、一方の継手部材１１の継手部１２の開口部が内側を向き、他方の継手部材１５の継手部１６の開口部が外側を向くように構成したが、一方の継手部材１１の継手部１２の開口部が外側を向き、他方の継手部材１５の継手部１６の開口部が内側を向くように構成してもよい。   In the above description, the opening of the joint portion 12 of one joint member 11 faces inward and the opening of the joint portion 16 of the other joint member 15 faces outward. You may comprise so that the opening part of the joint part 12 of the member 11 may face the outer side, and the opening part of the joint part 16 of the other joint member 15 may face the inner side.

本発明による土留壁の止水構造の一実施の形態を示した概略図である。It is the schematic which showed one Embodiment of the water stop structure of the earth retaining wall by this invention. 止水構造の構築方法の説明図であって、一方のエレメントの端部の芯材に一方の継手部材を取り付け、他方のエレメントの端部の芯材に他方の継手部材を取り付けた状態を示した説明図である。It is explanatory drawing of the construction method of a water stop structure, Comprising: One joint member was attached to the core material of the edge part of one element, and the state which attached the other joint member to the core material of the edge part of the other element is shown FIG. 一方のエレメントの端部の芯材に継手防護板を取り付け、継手防護板によって一方の継手部材の周囲を包囲した状態を示した説明図である。It is explanatory drawing which showed the state which attached the joint protection board to the core material of the edge part of one element, and surrounded the circumference | surroundings of one joint member with the joint protection board. 継手防護板の外側の空間内に砕石を充填し、一方のエレメント用の溝内にコンクリートを打設した状態を示した説明図である。It is explanatory drawing which showed the state which filled the crushed stone in the space of the outer side of a joint protection board, and cast concrete in the groove | channel for one element. 一方の継手部材と他方の継手部材との噛合させた状態を示した説明図である。It is explanatory drawing which showed the state by which one joint member and the other joint member were meshed | engaged. 他方のエレメント用の溝内にコンクリートを打設し、一方のエレメントと他方のエレメントとを一体化した状態を示した説明図である。It is explanatory drawing which showed the state which casts concrete in the groove | channel for the other elements, and integrated one element and the other element. 一方の継手部材の変形例を示した説明図であって、上下方向に隣接する一方の継手部材の接合部の平面図である。It is explanatory drawing which showed the modification of one joint member, Comprising: It is a top view of the junction part of one joint member adjacent to an up-down direction. 図７のＡ−Ａ線に沿って見た断面図である。It is sectional drawing seen along the AA line of FIG. 本体構造物の底盤部と土留壁との間の止水方法を示した説明図であって、土留壁側に防水シートを貼り付けた状態を示した説明図である。It is explanatory drawing which showed the water stop method between the bottom base part of a main body structure, and a retaining wall, Comprising: It is explanatory drawing which showed the state which affixed the waterproof sheet to the retaining wall side. 土留壁側の防水シートを本体構造物の底盤部の防水シートに接合した状態を示した説明図である。It is explanatory drawing which showed the state which joined the waterproof sheet of the earth retaining wall side to the waterproof sheet of the baseboard part of a main-body structure.

符号の説明Explanation of symbols

１ 地中連続壁、２ エレメント、２ａ 壁面、
２ｂ 一方のエレメント、２ｃ 他方のエレメント、３ 芯材、
３ａ 端部の芯材（一方のエレメント）、３ｂ 端部の芯材（他方のエレメント）、
４ フランジ、４ａ 表面、４ｂ 側部、５ リブ、５ａ 表面、
７ 止水構造、１０ 止水手段、１１ 一方の継手部材、
１２ 継手部、１２ａ 表面、１３ 取付け部、１４ スペーサ部材、
１５ 他方の継手部材、１６ 継手部、１６ａ 表面、１７ 取付け部、
２０ 継手部シール部材、２１ 支持板、２２ 側部シール部材、
２３ 接合部シール部材、２４ 押さえ板、２５ ボルト、２６ ナット、
２７ 側部ガイド、２８ 溝、２９ 中央部ガイド、３０ 溝、
３１ 継手防護板、３２ 支柱、３３ フランジ、３４ 空間、
３５ 繋ぎ目用シール部材、３６ ガイド部、３７ 連結棒、
３８ 防水シート（土留壁側）、３９ 防水シート（底盤側）、
４０ 砕石、４１ コンクリート、４５ 地盤、４５´ 本体構造物側の地盤、
４６ａ 一方のエレメント用の溝、４６ｂ 他方のエレメント用の溝、
５０ 底盤部、５５ 砕石、５６ 捨てコンクリート 1 underground continuous wall, 2 element, 2a wall surface,
2b one element, 2c the other element, 3 core material,
3a Core material at the end (one element), 3b Core material at the end (the other element),
4 flange, 4a surface, 4b side, 5 rib, 5a surface,
7 water stop structure, 10 water stop means, 11 joint member,
12 joint part, 12a surface, 13 attachment part, 14 spacer member,
15 other joint member, 16 joint part, 16a surface, 17 attachment part,
20 joint seal member, 21 support plate, 22 side seal member,
23 joint seal member, 24 pressure plate, 25 bolt, 26 nut,
27 Side guide, 28 groove, 29 Center guide, 30 groove,
31 joint guard plate, 32 struts, 33 flange, 34 space,
35 Sealing member for joint, 36 guide part, 37 connecting rod,
38 waterproof sheet (the retaining wall side), 39 waterproof sheet (bottom panel side),
40 crushed stone, 41 concrete, 45 ground, 45 'ground on the main structure side,
46a Groove for one element, 46b Groove for the other element,
50 Bottom plate, 55 Crushed stone, 56 Discarded concrete

Claims (5)

芯材を備える複数のエレメントを横方向に並べてなる土留壁の隣接するエレメント間を止水する土留壁の止水構造であって、
隣接する一方のエレメントの端部の芯材に取り付けられる一方の継手部材と、他方のエレメントの端部の芯材に取り付けられるとともに、前記一方の継手部材と相互に噛合する他方の継手部材と、前記一方の継手部材と前記他方の継手部材との噛合部分に介装されて、該噛合部分を水密にシールするシール部材とからなる止水手段を備えていることを特徴とする土留壁の止水構造。 A retaining wall water stop structure for stopping water between adjacent elements of the retaining wall formed by arranging a plurality of elements including a core material in a lateral direction,
One joint member attached to the core material at the end of one adjacent element, and the other joint member attached to the core material at the end of the other element and meshing with the one joint member; A retaining wall for retaining the earth retaining wall is provided with a water stop means interposed between a meshing portion of the one joint member and the other joint member and sealingly sealing the meshing portion. Water structure. 前記一方の継手部材には略コ形状の継手部が設けられ、前記他方の継手部材には前記継手部と相互に噛合する略コ形状の継手部が設けられ、前記両継手部の噛合部分に前記シール部材が介装されていることを特徴とする請求項１に記載の土留壁の止水構造。   The one joint member is provided with a substantially U-shaped joint portion, and the other joint member is provided with a substantially U-shaped joint portion that meshes with the joint portion. The water retaining structure for a retaining wall according to claim 1, wherein the seal member is interposed. 前記シール部材は、水膨張ゴム弾性材からなり、前記両継手部の噛合部分に設けられたスペーサ部材によって変形方向が規制されていることを特徴とする請求項２に記載の土留壁の止水構造。   The said sealing member consists of a water expansion rubber elastic material, The deformation direction is controlled by the spacer member provided in the meshing part of the said both joint parts, The water stop of the earth retaining wall of Claim 2 characterized by the above-mentioned. Construction. 前記一方のエレメント及び前記他方のエレメントの端部の芯材はＨ型鋼からなり、前記端部の芯材の一方のフランジに前記一方の継手部材及び前記他方の継手部材が取り付けられていることを特徴とする請求項１から３の何れかに記載の土留壁の止水構造。   The core material at the end of the one element and the other element is made of H-shaped steel, and the one joint member and the other joint member are attached to one flange of the core material at the end. The water stop structure of the earth retaining wall according to any one of claims 1 to 3. 芯材を備える複数のエレメントを横方向に並べてなる土留壁の隣接するエレメント間を止水する土留壁の止水構造の構築方法であって、
隣接する一方のエレメントの端部の芯材に一方の継手部材を取り付け、他方のエレメントの端部の芯材に他方の継手部材を取り付ける工程と、
地盤に設けた一方のエレメント用の溝内に端部の芯材を含む複数の芯材を建て込み、該一方のエレメント用の溝の端部に端部の芯材を配置する工程と、
端部の芯材に継手防護板を取り付け、この継手防護板によって一方の継手の周囲を包囲するとともに、継手防護板の外側に形成される空間内に砕石を充填する工程と、
一方のエレメント用の溝内にコンクリートを打設する工程と、
前記空間内から砕石及び継手防護板を取り除き、地盤に設けた他方のエレメント用の溝内に端部の芯材を含む複数の芯材を建て込み、該他方のエレメント用の溝の端部に端部の芯材を配置する工程と、
前記他方のエレメント用の溝内にコンクリートを打設し、該コンクリートを該溝から一方のエレメントとの繋ぎ目に回り込ませる工程とを備え、
複数のエレメントに対して前記一連の工程を繰り返し行うことにより、複数のエレメントを一体化した土留壁を構築し、隣接するエレメント間を止水することを特徴とする土留め壁の止水構造の構築方法。 A construction method of a water retaining structure for a retaining wall that stops water between adjacent elements of the retaining wall formed by arranging a plurality of elements including a core material in a lateral direction,
Attaching one joint member to the core material at the end of one adjacent element, and attaching the other joint member to the core material at the end of the other element;
A step of building a plurality of core materials including an end core material in a groove for one element provided on the ground, and arranging an end core material at an end of the groove for the one element;
A step of attaching a joint protection plate to the end core material, surrounding the periphery of one joint by this joint protection plate, and filling a crushed stone in a space formed outside the joint protection plate;
Placing concrete in the groove for one element;
The crushed stone and the joint protection plate are removed from the space, and a plurality of core materials including an end core material are built in the groove for the other element provided on the ground, and the end of the groove for the other element is built. A step of arranging the end core material;
Placing concrete in the groove for the other element, and wrapping the concrete around the joint with the one element from the groove,
A series of steps are repeated for a plurality of elements to construct a retaining wall in which a plurality of elements are integrated, and to stop water between adjacent elements. Construction method.
JP2007212989A 2007-08-17 2007-08-17 Water cutoff structure of earth retaining wall, and water cutoff structure construction method Pending JP2009046853A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032433A (en) * 1983-08-01 1985-02-19 Nippon Telegr & Teleph Corp <Ntt> Over-sample type coder
JPH03180613A (en) * 1989-12-08 1991-08-06 Shimizu Corp Underground continuous wall
JPH07279162A (en) * 1994-04-14 1995-10-24 Nkk Corp Steel sheet pile
JP2000248542A (en) * 1999-03-03 2000-09-12 Tone Geo Tech Co Ltd Solidifying material outflow preventive method from element in steel underground continuous wall construction method and steel underground continuous wall member used therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032433A (en) * 1983-08-01 1985-02-19 Nippon Telegr & Teleph Corp <Ntt> Over-sample type coder
JPH03180613A (en) * 1989-12-08 1991-08-06 Shimizu Corp Underground continuous wall
JPH07279162A (en) * 1994-04-14 1995-10-24 Nkk Corp Steel sheet pile
JP2000248542A (en) * 1999-03-03 2000-09-12 Tone Geo Tech Co Ltd Solidifying material outflow preventive method from element in steel underground continuous wall construction method and steel underground continuous wall member used therefor

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