JP2009030241A - Water cutoff structure of earth retaining wall, and method of constructing water cutoff structure - Google Patents
Water cutoff structure of earth retaining wall, and method of constructing water cutoff structure Download PDFInfo
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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(地中連続壁等)を本体構造物の地下外壁等として利用する際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。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining structure for a retaining wall and a method for constructing the retaining structure, and more particularly to retaining a retaining wall that is effective when a retaining wall (such as an underground continuous wall) is used as an underground outer wall of a main body structure. The present invention relates to a structure and a construction method of a water stop structure.
一般に、地中に構築した土留壁(地中連続壁等)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 (underground continuous wall, etc.) built in the ground as an underground outer wall of the main structure, rainwater or spring water leaking from the retaining wall acts on the main structure. In order to prevent the durability of the structure from being affected, a water stop structure is applied to the wall surface 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、特許文献1には、地中連続壁の構築後に、地中連続壁の前面側の地盤を掘削して地中連続壁の壁面を露出させ、この露出させた壁面の隣接する芯材のフランジ間に防水シートを配置し、防水シートの端部を両フランジの表面に両面接着体により接着することで、地中連続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 an example of a water stop structure for preventing water leakage from such a retaining wall, for example, in Patent Document 1, after the construction of the underground continuous wall, the ground on the front side of the underground continuous wall is excavated to continue underground. By exposing the wall surface of the wall, placing a waterproof sheet between the adjacent core flanges of the exposed wall surface, and bonding the end of the waterproof sheet to the surface of both flanges with a double-sided adhesive, A water stop structure configured to prevent water leakage from the wall is disclosed.
しかし、このような構成の止水構造にあっては、地中連続壁の前面側に本体構造物の地下壁等を構築した場合に、地下壁等と地中連続壁の芯材のフランジとの間に異物(止水シート)が介在することになるため、本体構造物と地中連続壁との間で応力を確実に伝達させることが困難になる。 However, in the water stop structure with such a structure, when the underground wall of the main body structure is constructed on the front side of the underground continuous wall, the underground wall and the flange of the core material of the underground continuous wall Since a foreign substance (water-stop sheet) is interposed between them, it is difficult to reliably transmit stress between the main body structure and the underground continuous wall.
一方、特許文献2には、地中連続壁の芯材のフランジの側部間に防水シートを配置し、防水シートの端部をフランジの側部に設けた受け部に弾性体を嵌合させることで固定するように構成した止水構造が開示されている。 On the other hand, in patent document 2, a waterproof sheet is arrange | positioned between the side parts of the flange of the core material of an underground continuous wall, and an elastic body is fitted to the receiving part which provided the edge part of the waterproof sheet in the side part of the flange. The water stop structure comprised so that it may fix by this is disclosed.
このような構成の止水構造にあっては、芯材のフランジの表面に防水シートが介在していないので、本体構造物と地中連続壁との間で応力を確実に伝達させることができる。 In the water stop structure having such a structure, since the waterproof sheet is not interposed on the surface of the flange of the core material, it is possible to reliably transmit stress between the main body structure and the underground continuous wall. .
しかし、受け部に弾性体を嵌合させることで、防水シートの端部をフランジの側部に固定しているため、地中連続壁に作用する水圧が大きい場合には、その水圧によって防水シートの端部が受け部から離脱し、防水シートによる防水性が損なわれてしまう虞がある。
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(地中連続壁等)と本体構造物との間で応力を確実に伝達させることができるとともに、長期に亘って土留壁(地中連続壁等)を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 can reliably transmit stress between a retaining wall (such as an underground continuous wall) and a main body structure, and for a long time. It aims at providing the construction method of the water-stopping structure of the earth-holding wall and the water-stopping structure which can water-stop a retaining wall (underground continuous wall etc.).
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、壁体の内部に複数の鋼製の芯材が間隔をおいて埋設された土留壁を本体構造物に利用する際に、該土留壁を止水する土留壁の止水構造であって、前記土留壁の前記本体構造物側の壁面に設けられて、前記土留壁の隣接する芯材間を止水する止水手段と、該止水手段を前記芯材に水密に連結する連結手段と、前記止水手段に設けられて前記土留壁に作用する水を回収し、該水を貯水部に導く導水手段とを備えてな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 soil retaining device for stopping the retaining wall when using a retaining wall in which a plurality of steel cores are embedded in the wall body at intervals. A water-stopping structure for a wall, the water-stopping means provided on a wall surface of the earth retaining wall on the main body structure side for stopping water between adjacent core members of the earth-holding wall, and the water-stopping means for the core It is characterized by comprising connecting means for watertightly connecting to the material, and water guiding means provided in the water stopping means for collecting water acting on the earth retaining wall and guiding the water to a water storage section.
本発明による土留壁の止水構造によれば、土留壁の本体構造物側の壁面の隣接する芯材間が止水手段によって止水される。この場合、芯材の表面と本体構造物との間に異物(止水手段)が介在することはないので、土留壁と本体構造物との間で応力伝達を確実に行うことができる。また、止水手段は、土留壁に作用する水を回収して貯水部に導く導水手段を備えているので、土留壁に作用する水圧を低減させることができ、止水手段が水圧によって土留壁から離脱したりするのを防止できる。 According to the water retaining structure for the retaining wall according to the present invention, the water between the adjacent core members of the wall surface on the main body structure side of the retaining wall is stopped by the water stopping means. In this case, no foreign matter (water stop means) is interposed between the surface of the core material and the main body structure, so that stress can be reliably transmitted between the earth retaining wall and the main body structure. In addition, the water stopping means is provided with water guiding means that collects water acting on the retaining wall and guides it to the water storage part, so that the water pressure acting on the retaining wall can be reduced, and the water retaining means can be reduced by the water pressure. Can be prevented from leaving.
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、前記止水手段は、前記土留壁の前記本体構造物側の壁面に設けられて、前記土留壁の隣接する芯材間の壁面を止水するシート状の第1止水シートと、前記土留壁の前記本体構造物側の壁面の下端部に設けられて、該下端部の壁面の全体及び該下端部と前記本体構造物の底版部との間を止水する第2止水シートと、前記本体構造物の底版部の表面を止水する第3止水シートとからな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 water retaining means is provided on a wall surface of the retaining wall on the main body structure side, The sheet-shaped first water-stop sheet that stops the wall surface between the adjacent core members, and the lower end of the wall on the main body structure side of the retaining wall, the entire wall surface of the lower end and the lower end It consists of the 2nd water stop sheet which stops water between a part and the bottom plate part of the said main body structure, and the 3rd water stop sheet which stops the surface of the bottom plate part of the said main body structure.
本発明による土留壁の止水構造によれば、土留壁の本体構造物側の壁面の隣接する芯材間が第1止水シートで止水され、土留壁の本体構造物側の壁面の下端部の全体、及び土留壁の壁面の下端部と本体構造物の底版部との間が第2止水シートで止水され、本体構造物の底版部の表面が第3止水シートによって止水されることになる。 According to the water retaining structure for the retaining wall according to the present invention, the adjacent core members of the wall surface on the main body structure side of the retaining wall are water-stopped by the first water stopping sheet, and the lower end of the wall surface on the main body structure side of the retaining wall. The whole part and between the lower end of the wall surface of the retaining wall and the bottom plate part of the main body structure are stopped by the second water stop sheet, and the surface of the bottom plate part of the main body structure is stopped by the third water stop sheet. Will be.
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、前記連結手段は、前記芯材の側部に連結される内側支持部材と、該内側支持部材の表面に重合される内側シール部材と、該内側シール部材の表面に重合される外側シール部材と、該外側シール部材の表面に重合される外側支持部材と、前記外側支持部材、前記外側シール部材、前記内側シール部材、及び前記内側支持部材を一体に連結するねじ締結体とからなり、前記内側シール部材と前記外側シール部材との間で前記第1止水シートの端部が水密に挟持固定されることを特徴とする。 The invention according to claim 3 is the water retaining structure for the earth retaining wall according to claim 2, wherein the connecting means includes an inner support member connected to a side portion of the core member, and a surface of the inner support member. An inner seal member that is polymerized, an outer seal member that is polymerized on the surface of the inner seal member, an outer support member that is polymerized on the surface of the outer seal member, the outer support member, the outer seal member, It comprises an inner seal member and a screw fastening body that integrally connects the inner support member, and the end portion of the first water-stop sheet is sandwiched and fixed between the inner seal member and the outer seal member in a watertight manner. It is characterized by that.
本発明による土留壁の止水構造によれば、第1止水シートの端部を内側シール部材と外側シール部材との間で挟持し、この状態で第1止水シートの端部を内側支持部材の表面に重合し、外側シール部材の表面に外側支持部材を重合し、外側支持部材、外側シール部材、内側シール部材、及び内側支持部材をねじ締結体によって一体に連結することで、内側シール部材と外側シール部材との間で第1止水シートの端部が水密に挟持固定されることになる。 According to the water stop structure of the earth retaining wall according to the present invention, the end of the first water stop sheet is sandwiched between the inner seal member and the outer seal member, and the end of the first water stop sheet is supported on the inner side in this state. By superposing the outer support member on the surface of the member, superposing the outer support member on the surface of the outer seal member, and connecting the outer support member, the outer seal member, the inner seal member, and the inner support member together by a screw fastening body, the inner seal The end portion of the first water stop sheet is sandwiched and fixed in a watertight manner between the member and the outer seal member.
請求項4に係る発明は、請求項3に記載の土留壁の止水構造であって、前記ねじ締結体は、前記外側支持部材、前記外側シール部材、前記内側シール部材、及び前記内側支持部材を貫通する締結ねじと、該締結ねじの前記内側支持部材から突出した先端部に螺着される締結ナットとを備え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 claim 3, wherein the screw fastening body includes the outer support member, the outer seal member, the inner seal member, and the inner support member. And a fastening nut that is screwed onto a tip portion protruding from the inner support member of the fastening screw.
本発明による土留壁の止水構造によれば、外側支持部材、外側シール部材、内側シール部材、及び内側支持部材に締結ねじを貫通させ、内側支持部材から突出させた締結ねじの先端部に締結ナットを螺着させることで、外側支持部材、外側シール部材、内側シール部材、及び内側支持部材が一体に連結され、外側シール部材と内側シール部材との間で第1止水シートの端部が水密に挟持固定されることになる。 According to the water retaining structure of the earth retaining wall according to the present invention, the fastening screw is passed through the outer support member, the outer seal member, the inner seal member, and the inner support member, and fastened to the distal end portion of the fastening screw protruding from the inner support member. By screwing the nut, the outer support member, the outer seal member, the inner seal member, and the inner support member are integrally connected, and the end portion of the first water blocking sheet is between the outer seal member and the inner seal member. It will be pinched and fixed tightly.
請求項5に係る発明は、請求項4に記載の土留壁の止水構造であって、前記外側支持部材の表面側には、前記締結ねじの貫通部をシールする補助シール部材が重合されていることを特徴とする。 The invention according to claim 5 is the water retaining structure for the retaining wall according to claim 4, wherein an auxiliary seal member that seals the penetration portion of the fastening screw is superposed on the surface side of the outer support member. It is characterized by being.
本発明による土留壁の止水構造によれば、外側支持部材の締結ねじの貫通部は、外側支持部材の表面側に重合される補助シール部材によってシールされることになる。 According to the water retaining structure of the earth retaining wall according to the present invention, the penetration portion of the fastening screw of the outer support member is sealed by the auxiliary seal member that is superposed on the surface side of the outer support member.
請求項6に係る発明は、請求項5に記載の土留壁の止水構造であって、前記締結ねじには、前記補助シール部材を前記外側支持部材の表面に圧接する補助ナットが螺着されていることを特徴とする。 The invention according to claim 6 is the water retaining structure for the retaining wall according to claim 5, wherein an auxiliary nut that presses the auxiliary seal member against the surface of the outer support member is screwed onto the fastening screw. It is characterized by.
本発明による土留壁の止水構造によれば、補助ナットを締め付けることにより、補助シール部材が外側支持部材の表面に圧接され、外側支持部材の締結ねじの貫通部がシールされることになる。 According to the water retaining structure of the earth retaining wall according to the present invention, by tightening the auxiliary nut, the auxiliary seal member is pressed against the surface of the outer support member, and the penetration portion of the fastening screw of the outer support member is sealed.
請求項7に係る発明は、請求項2から6の何れかに記載の土留壁の止水構造であって、前記第2止水シートは、内側に前記第1止水シートの下端部を介在させた状態で前記土留め壁の壁面の下端部に下端部が水密に一体に連結され、上端部が前記本体構造物の底版部の表面側に折り返された状態で、前記第3止水シートに水密に一体に連結されていることを特徴とする。 The invention according to claim 7 is the retaining wall water stop structure according to any one of claims 2 to 6, wherein the second water stop sheet interposes the lower end portion of the first water stop sheet inside. In a state where the bottom wall of the earth retaining wall is connected to the lower end portion of the retaining wall in a watertight manner and the upper end portion is folded back to the surface side of the bottom plate portion of the main body structure, It is characterized by being integrally connected to the watertight.
本発明による土留壁の止水構造によれば、第2止水シートによって土留壁の下端部の壁面の全体、及び土留壁の下端部と本体構造物の底版部との間が止水されることになる。 According to the water retaining structure for a retaining wall according to the present invention, the entire wall surface at the lower end portion of the retaining wall and the space between the lower end portion of the retaining wall and the bottom plate portion of the main body structure are stopped by the second water stopping sheet. It will be.
請求項8に係る発明は、壁体の内部に複数の鋼製の芯材が間隔をおいて埋設された土留壁を本体構造物に利用する際に、該土留壁を止水する土留壁の止水構造の構築方法であって、前記土留壁の構築後に、前記土留壁の前記本体構造物側の壁面を削って前記芯材の表面を露出させるとともに、前記芯材の側部に予め取り付けておいた支持部材の表面を露出させる工程と、裏面側に予め導水部材を取り付けておいた第1止水シートの両端部を一対のシール部材間で挟持し、この状態で前記第1止水シートの両端部を前記支持部材の表面側に重合させ、さらに外側のシール部材の表面側に前記支持部材と対となる支持部材を重合させ、前記外側の支持部材、外側のシール部材、第1止水シート、内側のシール部材、及び内側の支持部材に締結ねじを貫通させ、該締結ねじに締結ナットを螺合させて締め付けることにより、前記第1止水シートの端部を前記芯材の側部に水密に連結する工程と、前記土留壁の前記本体構造物の底版部に対向する下端部の壁面の全体に第2止水シートを配置し、該第2止水シートの下端部を内側に前記第1止水シートの下端部を介在させた状態で該下端部の壁面に水密に一体に接合し、該第2止水シートの上端部を前記本体構造物の底版部の表面上に折り返して、底版部の表面に配置されている第3止水シートに水密に一体に接合する工程とを備えていることを特徴とする。 According to an eighth aspect of the present invention, there is provided a retaining wall for stopping the retaining wall when a retaining wall in which a plurality of steel core members are embedded at intervals in the wall body is used for a main body structure. A method for constructing a water stop structure, wherein after the construction of the retaining wall, the wall surface of the retaining structure wall on the main body structure side is shaved to expose the surface of the core material and attached to the side of the core material in advance. The step of exposing the surface of the supporting member that has been placed, and the both ends of the first water-stop sheet on which the water guide member has been attached in advance on the back side are sandwiched between a pair of seal members, and in this state the first water-stop The both ends of the sheet are superposed on the surface side of the support member, and the support member paired with the support member is superposed on the surface side of the outer seal member, and the outer support member, the outer seal member, the first Fastening screw to water stop sheet, inner seal member, and inner support member A step of watertightly connecting an end portion of the first waterstop sheet to a side portion of the core member by passing through and fastening a fastening nut to the fastening screw, and the main body structure of the earth retaining wall A second water stop sheet is disposed on the entire wall surface of the lower end portion facing the bottom plate portion of the first water stop sheet, and the lower end portion of the first water stop sheet is interposed inside the lower end portion of the second water stop sheet. A third water-stop sheet that is joined to the wall surface of the lower end portion in a water-tight manner, the upper end portion of the second water-stop sheet is folded back onto the surface of the bottom plate portion of the main body structure, and is disposed on the surface of the bottom plate portion And a step of integrally joining in a watertight manner.
請求項9に係る発明は、請求項8に記載の土留壁の止水構造の構築方法であって、前記内側の支持部材の表面側には前記締結ねじの貫通部を塞ぐ防護材が剥離可能に貼着され、前記内側の支持部材の裏面側の前記締結ねじの貫通部に対応する部分には締結ナットが接着され、該締結ナットの表面は被覆材によって被覆され、この状態で前記芯材を前記土留壁の構築場所に建て込み、該構築場所に充填材を打設して該充填材が固化した後に、前記土留壁の前記本体構造物側の壁面を削って前記内側支持部材の表面側を露出させることを特徴とする。 The invention according to claim 9 is the construction method of the water stop structure of the retaining wall according to claim 8, wherein the protective material that closes the penetration portion of the fastening screw is peelable on the surface side of the inner support member A fastening nut is bonded to a portion corresponding to a through-hole of the fastening screw on the back side of the inner support member, and the surface of the fastening nut is covered with a covering material, and in this state, the core material Is installed in the construction site of the retaining wall, and after the filler is solidified by placing the filler in the construction site, the surface of the inner support member is scraped off the wall surface on the main body structure side of the retaining wall. The side is exposed.
本発明による土留壁の止水構造の構築方法によれば、内側の支持部材の表面側には締結ねじの貫通部を塞ぐ防護材が剥離可能に貼着され、内側の支持部材の裏面側の締結ねじの貫通部に対応する部分には締結ナットが接着され、締結ナットの表面は被覆材によって被覆されているので、芯材を土留壁の構築場所に建て込んで構築場所に充填材を打設しても、充填材が内側の支持部材の締結ねじの貫通部に回り込んで、締結ねじの貫通を阻害するようなことはない。また、締結ナットのねじ孔に充填材が回り込んで、締結ナットのねじ孔への締結ねじの螺合を阻害するようなこともない。 According to the construction method of the water retaining structure of the retaining wall according to the present invention, the protective material that closes the penetration portion of the fastening screw is detachably attached to the surface side of the inner support member, and the back surface side of the inner support member is peeled off. A fastening nut is adhered to the part corresponding to the penetration part of the fastening screw, and the surface of the fastening nut is covered with a coating material. Therefore, the core material is built in the construction site of the earth retaining wall and the filling material is applied to the construction site. Even if it is provided, the filler does not go around the penetration portion of the fastening screw of the inner support member and hinder the penetration of the fastening screw. Further, the filler does not go around the screw hole of the fastening nut and hinder the screwing of the fastening screw into the screw hole of the fastening nut.
以上、説明したように、本発明の土留壁の止水構造及び止水構造の構築方法によれば、土留壁の芯材の表面と本体構造物との間に異物(止水手段(第1止水シート))が介在することがないので、土留壁と本体構造物との間で応力を確実に伝達させることができる。また、第1止水シートの端部は芯材のフランジの側部に連結手段によって強固に連結されているので、土留壁に作用する水圧によって第1止水シートが剥離するようなことはなく、長期に亘って良好な止水性能を発揮することができる。さらに、第1止水シートには導水手段が設けられ、この導水手段によって雨水や湧水等の水が回収された貯水部に導かれることになるので、土留壁に作用する水圧を低減させることができ、これによっても止水手段が設置位置から離脱するのを防止でき、長期に亘って止水手段による良好な止水性能を発揮することができる。 As described above, according to the water retaining structure of the retaining wall and the construction method of the water retaining structure of the present invention, foreign matter (water retaining means (first water stopping means (first Since the water blocking sheet)) is not interposed, stress can be reliably transmitted between the retaining wall and the main body structure. Moreover, since the edge part of the 1st water stop sheet | seat is firmly connected by the connection means to the side part of the flange of a core material, the 1st water stop sheet | seat does not peel by the water pressure which acts on the earth retaining wall. In addition, good water stop performance can be exhibited over a long period of time. Further, the first water stop sheet is provided with water guiding means, and water such as rain water and spring water is guided by the water guiding means to reduce the water pressure acting on the retaining wall. This can also prevent the water stop means from leaving the installation position, and can exhibit good water stop performance by the water stop means over a long period of time.
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4には、本発明による土留壁の止水構造の一実施の形態が示されていて、図1は第1止水シートと土留壁との関係を示す断面図、図2は第2止水シート及び第3止水シートと土留壁との関係を示す断面図、図3は第1止水シートと連結手段との関係を示す断面図、図4は第1止水シートの平面図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of a water retaining structure for a retaining wall according to the present invention. FIG. 1 is a sectional view showing the relationship between the first water retaining sheet and the retaining wall, and FIG. Sectional drawing which shows the relationship between a 2nd water stop sheet and 3rd water stop sheet, and a retaining wall, FIG. 3 is sectional drawing which shows the relationship between a 1st water stop sheet and a connection means, FIG. It is a top view.
すなわち、本実施の形態に示す土留壁1の止水構造10は、土留壁1を本体構造物35の地下外壁等として利用する際に適用され、土留壁1を止水して土留壁1からの漏水が本体構造物35に作用するのを阻止するのに有効なものであって、土留壁1を止水する止水手段11と、止水手段11を土留壁1に連結する連結手段20と、土留壁1に作用する水を回収して貯水部に導く導水手段31とを備えている。 That is, the water retaining structure 10 of the retaining wall 1 shown in the present embodiment is applied when the retaining wall 1 is used as an underground outer wall or the like of the main body structure 35, and the retaining wall 1 is stopped from the retaining wall 1. Effective in preventing the leakage of water from acting on the main body structure 35, the water stopping means 11 for stopping the retaining wall 1, and the connecting means 20 for connecting the water stopping means 11 to the retaining wall 1. And water guiding means 31 for collecting water that acts on the retaining wall 1 and guiding it to the water storage section.
土留壁1は、例えば、地盤に平面視長方形状の溝を所定の深さで掘削し、この溝内に複数の鋼製の芯材3を所定の間隔ごとに建て込み、溝内にトレミー管を用いて充填材としてのコンクリート6を打設することにより溝の形状に合致した壁体2を構築し、このような壁体2を地盤に連続して複数構築し、隣接する壁体2間を一体連結して構成した地中連続壁1であって、この地中連続壁1を本体構造物35の地下外壁等として利用するものである。 The retaining wall 1 is formed by, for example, excavating a groove having a rectangular shape in plan view in the ground at a predetermined depth, and installing a plurality of steel cores 3 at predetermined intervals in the groove, By constructing concrete 6 as a filler by using a wall, a wall body 2 conforming to the shape of the groove is constructed, and a plurality of such wall bodies 2 are continuously constructed on the ground, and between adjacent wall bodies 2 The underground continuous wall 1 is configured by integrally connecting the two, and the underground continuous wall 1 is used as an underground outer wall of the main body structure 35 or the like.
本実施の形態においては、図1に示すように、地中連続壁1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が壁体2の壁面2aに沿い、リブ5が壁体2の壁面2aと直交するように、複数の芯材3を各壁体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 FIG. 1, H-shaped steel is used for the core material 3 constituting the underground continuous wall 1, and the surface 4 a of the flange 4 of each core material 3 extends along the wall surface 2 a of the wall body 2. A plurality of core members 3 are embedded in each wall body 2 at predetermined intervals so that the ribs 5 are orthogonal to the wall surface 2 a of the wall body 2.
止水手段11は、シート状の止水シート12、13、14であって、合成樹脂系、合成ゴム系、アスファルト系等の止水性を有する材料からなる市販の止水シートを用いることができる。本実施の形態においては、合成樹脂系の止水シート12、13、14(エバブリッド;商品名)を用い、図1及び図2に示すように、地中連続壁1の隣接する芯材3のフランジ4間に第1止水シート12を設け、地中連続壁1の本体構造物35の底版部36に対向する部分に第2止水シート13を設け、本体構造物35の底版部36の表面36aに第3止水シート14を設けている。 The water-stop means 11 is a sheet-like water-stop sheet 12, 13, or 14, which can be a commercially available water-stop sheet made of a material having water-stopping properties such as synthetic resin, synthetic rubber, and asphalt. . In the present embodiment, synthetic resin-based water-stop sheets 12, 13, and 14 (Evabrid; trade names) are used, and as shown in FIGS. 1 and 2, the adjacent core material 3 of the underground continuous wall 1 is used. The first water-stop sheet 12 is provided between the flanges 4, the second water-stop sheet 13 is provided in a portion of the underground continuous wall 1 facing the bottom plate portion 36 of the main body structure 35, and the bottom plate portion 36 of the main body structure 35 is provided. The 3rd water stop sheet 14 is provided in the surface 36a.
第1止水シート12は、図4に示すように、地中連続壁1の隣接する芯材3のフランジ4間の壁面2aの全体を被覆する短冊状に形成され、この短冊状の第1止水シート12の幅方向の両端部を後述する連結手段20によってフランジ4の側部4bに水密に一体に連結することで、隣接する芯材3のフランジ4間の壁面2aが止水され、壁面2aからの漏水が防止される。 As shown in FIG. 4, the first water-stop sheet 12 is formed in a strip shape covering the entire wall surface 2 a between the flanges 4 of the adjacent core members 3 of the underground continuous wall 1. By connecting both ends in the width direction of the water-stop sheet 12 to the side portions 4b of the flange 4 in a watertight manner by the connecting means 20 described later, the wall surface 2a between the flanges 4 of the adjacent core members 3 is stopped. Water leakage from the wall surface 2a is prevented.
第1止水シート12の裏面側の中央部には、導水手段31が第1止水シート12の略全長に亘って設けられ、この導水手段31によって地中連続壁1に作用する雨水や湧水等の水が回収されて地中連続壁1の開削底部に設けられている貯水部に導かれ、貯水部から排水ポンプによって外部に排水され、地中連続壁1に作用する水圧が低減され、第1止水シート12、後述する第2止水シート13、及び第3止水シート14に作用する水圧が低減される。なお、この排水ポンプによる水の回収作業は本体構造物35の構築が完了するまで連続して行われる。 A water guide means 31 is provided over the substantially entire length of the first water stop sheet 12 at the center of the back surface side of the first water stop sheet 12, and rainwater and springs acting on the underground continuous wall 1 by the water guide means 31. Water such as water is collected and guided to a water storage section provided at the open bottom of the underground continuous wall 1, drained to the outside by a drain pump from the water storage section, and water pressure acting on the underground continuous wall 1 is reduced. The water pressure acting on the first water-stop sheet 12, the second water-stop sheet 13 described later, and the third water-stop sheet 14 is reduced. In addition, the water collection operation by the drain pump is continuously performed until the construction of the main body structure 35 is completed.
導水手段31としては、例えば、導水性を有する材料(各種の発泡樹脂等)からなる平板状の導水部材31を用いることができる。但し、これに限定することになく、第1止水シート12の裏面側に貯水部に水を導く導水路を形成することができるもの(例えば、スペーサ等)であればよい。 As the water guide means 31, for example, a flat water guide member 31 made of a material having water conductivity (such as various foamed resins) can be used. However, the present invention is not limited to this, and any structure may be used as long as it can form a water conduit that guides water to the water storage section on the back surface side of the first water stop sheet 12.
連結手段20は、図3に示すように、芯材3のフランジ4の側部4bに一体に連結される支持部材21(内側支持部材21)と、内側支持部材21の表面に重合される一対のシール部材22、23(内側シール部材22及び外側シール部材23)と、一対のシール部材22、23の表面に重合される内側支持部材21と対となる支持部材24(外側支持部材24)と、外側支持部材24の表面側に重合される補助シール部材25と、補助シール部材25、外側支持部材24、外側シール部材23、内側シール部材22、及び内側支持部材21を一体に連結するねじ締結体26とを備えている。 As shown in FIG. 3, the connecting means 20 includes a support member 21 (inner support member 21) that is integrally connected to the side portion 4 b of the flange 4 of the core member 3, and a pair superposed on the surface of the inner support member 21. Sealing members 22, 23 (inner sealing member 22 and outer sealing member 23), and a supporting member 24 (outer supporting member 24) paired with an inner supporting member 21 superimposed on the surface of the pair of sealing members 22, 23. The auxiliary seal member 25 superposed on the surface side of the outer support member 24 and the screw fastening for integrally connecting the auxiliary seal member 25, the outer support member 24, the outer seal member 23, the inner seal member 22, and the inner support member 21. And a body 26.
内側支持部材21は、平鋼等からなる帯板状をなすものであって、芯材3の略全長に亘る長さに形成され、芯材3のフランジ4の側部4b中央部に表裏面がフランジ4の表面4aと平行となるように配置し、この状態でフランジ4の側部4bとの間を全長に亘って所定の間隔ごとに溶接により一体に接合することでフランジ4の側部4bに一体に連結される。 The inner support member 21 is in the form of a strip made of flat steel or the like, and is formed to have a length that extends over substantially the entire length of the core material 3. Are arranged so as to be parallel to the surface 4a of the flange 4, and in this state, the side portion of the flange 4 is integrally joined to the side portion 4b of the flange 4 by welding at predetermined intervals over the entire length. 4b is integrally connected to 4b.
芯材3のフランジ4の側部4bと内側支持部材21との間は、それらの間を溶接により一体に連結した後に、その表面に芯材3の略全長に亘って防水シール15を接着剤により一体に接合することでシールされ、これにより、芯材3のフランジ4と内側支持部材21との間が止水される。 Between the side portion 4b of the flange 4 of the core material 3 and the inner support member 21, the waterproof seal 15 is bonded to the surface thereof over the substantially entire length of the core material 3 after being integrally connected by welding. Therefore, the gap between the flange 4 of the core member 3 and the inner support member 21 is stopped.
内側支持部材21には、表裏面間を貫通する貫通孔21aが全長に亘って所定の間隔ごとに複数箇所に設けられ、各貫通孔21a内をねじ締結体26の締結ねじ27が貫通可能に構成されている。 The inner support member 21 is provided with through holes 21a penetrating between the front and back surfaces at a plurality of predetermined intervals over the entire length so that the fastening screws 27 of the screw fastening body 26 can pass through the through holes 21a. It is configured.
内側シール部材22は、水膨張性ゴムシール材(水に接した場合に、ゴム中の吸水成分が水を吸収し、自己の体積が膨張することにより、隙間を充填して水密性を高める機能を有する材料)からなる帯状をなすものであって、内側支持部材21と同一長さ、かつ内側支持部21材よりも小幅に形成される。 The inner seal member 22 is a water-expandable rubber seal material (when in contact with water, the water absorbing component in the rubber absorbs water and expands its own volume, thereby filling the gap and improving the water tightness. The inner support member 21 has the same length as the inner support member 21 and is formed with a smaller width than the inner support member 21 material.
内側シール部材22の内側支持部材21の貫通孔21aに対応する部分には、それぞれ表裏面間を貫通する貫通孔22aが設けられ、各貫通孔22a内をねじ締結体26の締結ねじ27が貫通可能に構成されている。内側シール部材22は、各貫通孔22aが内側支持部材21の各貫通孔21aと合致するように、内側支持部材21の表面側に重合される。本実施の形態においては、内側シール部材22にウルトラシール(商品名)を用いている。 A portion corresponding to the through hole 21a of the inner support member 21 of the inner seal member 22 is provided with a through hole 22a penetrating between the front and back surfaces, and the fastening screw 27 of the screw fastening body 26 passes through each through hole 22a. It is configured to be possible. The inner seal member 22 is superposed on the surface side of the inner support member 21 such that each through hole 22a matches with each through hole 21a of the inner support member 21. In the present embodiment, an ultra seal (trade name) is used for the inner seal member 22.
外側シール部材23は、内側シール部材22と同様に、水膨張性ゴムシール材からなる帯状をなすものであって、内側シール部材22と同一長さ、幅、厚みに形成され、内側シール部材22の各貫通孔22aに対応する部分にそれぞれ表裏面間を貫通する貫通孔23aが設けられ、各貫通孔23a内をねじ締結体26の締結ねじ27が貫通可能に構成されている。 Similar to the inner seal member 22, the outer seal member 23 has a band shape made of a water-expandable rubber seal material, and is formed to have the same length, width, and thickness as the inner seal member 22. A through hole 23a that penetrates between the front and back surfaces is provided in a portion corresponding to each through hole 22a, and a fastening screw 27 of a screw fastening body 26 is configured to be able to pass through each through hole 23a.
外側シール部材23は、内側シール部材22の表面側に各貫通孔23aが内側シール部材22の貫通孔22aと合致するように重合され、この外側シール部材23と内側シール部材22との間で第1止水シート12の幅方向の端部が水密に挟持固定される。本実施の形態においては、外側シール部材23に内側シール部材22と同様のウルトラシール(商品名)を用いている。 The outer seal member 23 is superposed on the surface side of the inner seal member 22 such that each through hole 23 a matches the through hole 22 a of the inner seal member 22, and the outer seal member 23 is positioned between the outer seal member 23 and the inner seal member 22. The end of the water stop sheet 12 in the width direction is sandwiched and fixed in a watertight manner. In the present embodiment, an ultra seal (trade name) similar to the inner seal member 22 is used for the outer seal member 23.
外側支持部材24は、内側支持部材21と同様に、平鋼等からなる帯板状をなすものであって、内側支持部材21と同一幅、長さに形成されるとともに、内側支持部材21の貫通孔21aに対応する部分にそれぞれ表裏面間を貫通する貫通孔24aが設けられ、各貫通孔24a内をねじ締結体26の締結ねじ27が貫通可能に構成されている。外側支持部材24は、外側シール部材23の表面側に各貫通孔24aが外側シール部材23の貫通孔23aと合致するように重合される。 The outer support member 24 has a strip shape made of flat steel or the like, like the inner support member 21, and is formed to have the same width and length as the inner support member 21. A through hole 24a that penetrates between the front and back surfaces is provided in a portion corresponding to the through hole 21a, and the fastening screw 27 of the screw fastening body 26 is configured to be able to pass through each through hole 24a. The outer support member 24 is superposed on the surface side of the outer seal member 23 such that each through hole 24 a matches the through hole 23 a of the outer seal member 23.
ねじ締結体26は、外側支持部材24の表面側から外側支持部材24の貫通孔24a、外側シール部材23の貫通孔23a、内側シール部材22の貫通孔22a、及び内側支持部材21の貫通孔21aを貫通し、先端部が内側支持部材21の裏面側に突出する締結ねじ27と、内側支持部材21の裏面側に突出した締結ねじ27の先端部に螺着される締結ナット28とを備えている。 The screw fastening body 26 includes a through hole 24a of the outer support member 24, a through hole 23a of the outer seal member 23, a through hole 22a of the inner seal member 22, and a through hole 21a of the inner support member 21 from the surface side of the outer support member 24. And a fastening screw 27 having a tip protruding to the back side of the inner support member 21 and a fastening nut 28 screwed to the tip of the fastening screw 27 protruding to the back side of the inner support member 21. Yes.
内側シール部材22と外側シール部材23との間に第1止水シート12の幅方向の端部を位置し、この状態で締結ねじ27と締結ナット28とを相互に締め付けることにより、第1止水シート12の幅方向の端部が内側シール部材22と外側シール部材23との間で水密に挟持固定される。この場合、第1止水シート12の幅方向の両端部には、外側シール部材23の貫通孔23a及び内側シール部材22の貫通孔22aに対応する部分にそれぞれ表裏面間を貫通する貫通孔12aが設けられ、この貫通孔12a内を締結ねじ27が貫通するように構成されている。 An end portion in the width direction of the first water blocking sheet 12 is positioned between the inner seal member 22 and the outer seal member 23, and in this state, the fastening screw 27 and the fastening nut 28 are fastened to each other, thereby An end portion in the width direction of the water sheet 12 is sandwiched and fixed in a watertight manner between the inner seal member 22 and the outer seal member 23. In this case, at both ends in the width direction of the first water-stop sheet 12, through-holes 12 a that penetrate between the front and back surfaces in portions corresponding to the through-holes 23 a of the outer seal member 23 and the through-holes 22 a of the inner seal member 22. The fastening screw 27 penetrates through the through hole 12a.
外側支持部材24の表面側の各貫通孔24aに対応する部分には補助シール部材25が重合され、この補助シール部材25の中心部を締結ねじ27を貫通させさた状態で、締結ねじ27の頭部27a側に螺着させた補助ナット29を締め付けることにより、補助シール部材25がワッシャ30を介して外側支持部材24の表面に圧接される。この補助シール部材25により、外側支持部材24の表面側から外側支持部材24の貫通孔24a、外側シール部材23の貫通孔23a、内側シール部材22の貫通孔22a、及び内側支持部材21の貫通孔21aがシールされる。 The auxiliary seal member 25 is superposed on the portion corresponding to each through-hole 24a on the surface side of the outer support member 24, and the fastening screw 27 is inserted in the state where the central portion of the auxiliary seal member 25 is passed through the fastening screw 27. By tightening the auxiliary nut 29 screwed to the head 27 a side, the auxiliary seal member 25 is pressed against the surface of the outer support member 24 via the washer 30. By this auxiliary seal member 25, the through hole 24 a of the outer support member 24, the through hole 23 a of the outer seal member 23, the through hole 22 a of the inner seal member 22, and the through hole of the inner support member 21 from the surface side of the outer support member 24. 21a is sealed.
補助シール部材25は、内側シール部材22及び外側シール部材23と同様に、水膨張性ゴムシール材からなるものであって、円板状をなすとともに、周縁部に全周に亘る環状の突起25bが一体に設けられ、この突起25bを外側支持部材23の表面に圧接させることで外側支持部材24の表面側から各貫通孔24a、23a、22a、21aがシールされる。本実施の形態においては、補助シール部材25にウルトラリング(商品名)を用いている。 Like the inner seal member 22 and the outer seal member 23, the auxiliary seal member 25 is made of a water-expandable rubber seal material. The auxiliary seal member 25 has a disk shape, and an annular protrusion 25b around the entire periphery. The through holes 24 a, 23 a, 22 a, and 21 a are sealed from the surface side of the outer support member 24 by providing the protrusions 25 b in pressure contact with the surface of the outer support member 23. In the present embodiment, an ultra ring (trade name) is used for the auxiliary seal member 25.
上記の場合、外側支持部材24の貫通孔24a、外側シール部材23の貫通孔23a、内側シール部材22の貫通孔22a、及び内側支持部材21の貫通孔21aにシール剤等を充填し、補助シール部材25とシール剤との協働によって各貫通孔24a、23a、22a、21aをシールするようにしてもよい。 In the above case, the through hole 24a of the outer support member 24, the through hole 23a of the outer seal member 23, the through hole 22a of the inner seal member 22, and the through hole 21a of the inner support member 21 are filled with a sealing agent or the like, and the auxiliary seal You may make it seal each through-hole 24a, 23a, 22a, 21a by cooperation with the member 25 and a sealing agent.
第2止水シート13は、図2に示すように、シート状をなすものであって、本体構造物35の底版部36に対向する地中連続壁1の下端部の壁面2aの全体を覆う大きさに形成され、内側に第1止水シート12の下端部を介在させた状態で下端部が地中連続壁1の下端部の壁面2a及び芯材3のフランジ4の表面4aに接着剤により一体に接合される。第2止水シート13は、下端部が地中連続壁1に接合された状態で、本体構造物35の底版部36の表面36a側に折り返され、上端部が底版部36の表面36aを覆うように配置されているシート状の第3止水シート14に接着剤により一体に接合される。 As shown in FIG. 2, the second water-stop sheet 13 has a sheet shape and covers the entire wall surface 2 a of the lower end portion of the underground continuous wall 1 facing the bottom plate portion 36 of the main body structure 35. The adhesive is formed in a size, with the lower end of the first water-stop sheet 12 interposed inside, and the lower end of the adhesive on the wall surface 2a of the lower end of the underground continuous wall 1 and the surface 4a of the flange 4 of the core 3 Are joined together. The second waterstop sheet 13 is folded back to the surface 36a side of the bottom plate portion 36 of the main body structure 35 with the lower end portion joined to the underground continuous wall 1, and the upper end portion covers the surface 36a of the bottom plate portion 36. The sheet-like third waterstop sheet 14 arranged in this manner is integrally joined with an adhesive.
第2止水シート13は、その下端部を地中連続壁1の下端部に接着剤によって一体に接合するだけでもよいが、芯材3のフランジ4の側部4bに対応する部分を連結手段20によってフランジ4の側部4bに連結するようにしてもよい。このように連結手段20によって第2止水シート13を地中連続壁1のフランジ4の側部4bに連結することで、さらに強固に第2止水シート13を地中連続壁1に接合することができる。 The second water-stop sheet 13 may only be integrally joined to the lower end portion of the underground continuous wall 1 by an adhesive, but the portion corresponding to the side portion 4b of the flange 4 of the core material 3 is connected to the second water-stop sheet 13. 20 may be connected to the side 4 b of the flange 4. Thus, the 2nd water stop sheet 13 is joined to the underground continuous wall 1 more firmly by connecting the 2nd water stop sheet 13 to the side part 4b of the flange 4 of the underground continuous wall 1 by the connection means 20. be able to.
この場合、第2止水シート13の連結手段20は、第1止水シート12と兼用の連結手段20でフランジ4の側部4bに連結してもよいし、第1止水シート12と別体の連結手段20によってフランジ4の側部4bに連結するようにしてもよい。 In this case, the connecting means 20 of the second water-stop sheet 13 may be connected to the side portion 4b of the flange 4 by a connecting means 20 also serving as the first water-stop sheet 12, or separate from the first water-stop sheet 12. You may make it connect with the side part 4b of the flange 4 by the connection means 20 of a body.
次に、上記のように構成した土留壁1の止水構造10の構築方法について説明する。
まず、図5に示すように、H型鋼からなる芯材3のフランジ4の側部4bに内側支持部材21を溶接により一体に連結し、フランジ4の側部4bと内側支持部材21と間に防水シール15を接着剤によって一体に接合してそれらの間をシールする。
Next, the construction method of the water stop structure 10 of the earth retaining wall 1 configured as described above will be described.
First, as shown in FIG. 5, the inner support member 21 is integrally connected to the side portion 4 b of the flange 4 of the core member 3 made of H-shaped steel by welding, and the side portion 4 b of the flange 4 and the inner support member 21 are connected to each other. The waterproof seal 15 is joined together by an adhesive to seal between them.
この場合、内側支持部材21の表面がフランジ4の表面4aと平行となるように、かつ、内側支持部材21の表面に第1止水シート12を重合したときに、第1止水シート12の表面とフランジ4の表面4aとが面一となるように、フランジ4の側部4bに内側支持部材21を溶接により一体に連結する。 In this case, when the first water-stop sheet 12 is superposed on the surface of the inner support member 21 so that the surface of the inner support member 21 is parallel to the surface 4 a of the flange 4, The inner support member 21 is integrally connected to the side portion 4b of the flange 4 by welding so that the surface and the surface 4a of the flange 4 are flush with each other.
次に、内側支持部材21の表面側に発泡スチロール等からなる板状の防護材16を接着剤により一体に接合し、内側支持部材21の各貫通孔21aの開口部を閉塞する。さらに、内側支持部材21の裏面側の各貫通孔21aに対応する部分に締結ナット28を接着剤により一体に取り付け、締結ナット28の表面を粘着テープ等からなる被覆材17によって被覆し、締結ナット28のねじ孔の開口部を閉塞する。 Next, a plate-shaped protective material 16 made of foamed polystyrene or the like is integrally bonded to the surface side of the inner support member 21 with an adhesive, and the openings of the through holes 21a of the inner support member 21 are closed. Further, a fastening nut 28 is integrally attached to a portion corresponding to each through hole 21a on the back surface side of the inner support member 21 with an adhesive, and the surface of the fastening nut 28 is covered with a covering material 17 made of an adhesive tape or the like. The opening of 28 screw holes is closed.
そして、この状態で芯材3を地盤に設けた溝内に建て込み、図6に示すように、溝内にトレミー管によって充填材としてのコンクリート6を打設し、複数の芯材3が所定の間隔ごとに埋設された壁体2を構築し、このような構成の壁体2を複数連続して構築し、隣接する壁体2間を一体に連結することにより地中連続壁1を構築する。 Then, in this state, the core material 3 is built in a groove provided in the ground, and as shown in FIG. 6, concrete 6 as a filler is placed in the groove by a tremy tube, and a plurality of core materials 3 are predetermined. The wall body 2 embedded at every interval is constructed, a plurality of the wall bodies 2 having such a configuration are constructed continuously, and the underground wall 1 is constructed by connecting the adjacent wall bodies 2 together. To do.
次に、コンクリート6が固化して所定の強度を発現した後に、地中連続壁1の前面側(本体構造物35側)の地盤を掘削して地中連続壁1の前面側を露出させ、地中連続壁1の前面側の破線で示すコンクリート6の部分を削って芯材3のフランジ4の表面4aを露出させ、さらに内側支持部材21の表面から防護材16を剥離させて内側支持部材21の表面を露出させる。
この場合、芯材3のフランジ4の表面4aと隣接する芯材3のフランジ4間の壁面2aが面一になるように、コンクリート6の表面を平滑化する。
Next, after the concrete 6 is solidified and expresses a predetermined strength, the ground on the front side (the main body structure 35 side) of the underground continuous wall 1 is excavated to expose the front side of the underground continuous wall 1. The portion of the concrete 6 indicated by the broken line on the front side of the underground continuous wall 1 is shaved to expose the surface 4a of the flange 4 of the core material 3, and the protective material 16 is peeled off from the surface of the inner support member 21 to thereby support the inner support member. The surface of 21 is exposed.
In this case, the surface of the concrete 6 is smoothed so that the wall surface 2a between the flange 4 of the core material 3 adjacent to the surface 4a of the flange 4 of the core material 3 is flush.
次に、図7に示すように、隣接する左側の芯材3のフランジ4に取り付けられている内側支持部材21の表面に内側シール部材22を重合し、内側支持部材21の貫通孔21aと内側シール部材22の貫通孔22aとを合致させ、この状態で内側シール部材22を内側支持部材21の表面に接着剤により一体に接合する。 Next, as shown in FIG. 7, the inner seal member 22 is superposed on the surface of the inner support member 21 attached to the flange 4 of the adjacent left side core member 3, and the through hole 21 a and the inner side of the inner support member 21 are overlapped. The inner seal member 22 is integrally joined to the surface of the inner support member 21 with an adhesive in such a state that the through hole 22a of the seal member 22 is matched.
次に、図8に示すように、隣接する芯材3のフランジ4間に第1止水シート12を配置し、第1止水シート12の幅方向の一端部(左端部)を内側シール部材22の表面に重合し、第1止水シート12の幅方向の一端面(左端面)を芯材3のフランジ4の側部4bに当接させ、この状態で第1止水シートの幅方向の一端部(左端部)を内側シール部材22の表面に接着剤によって一体に接合する。 Next, as shown in FIG. 8, the first water stop sheet 12 is disposed between the flanges 4 of the adjacent core members 3, and one end portion (left end portion) of the first water stop sheet 12 in the width direction is the inner seal member. 22 is superposed on the surface of the first waterstop sheet 12 so that one end face (left end face) in the width direction of the first waterstop sheet 12 is brought into contact with the side portion 4b of the flange 4 of the core material 3 and in this state the width direction of the first waterstop sheet One end portion (left end portion) is integrally bonded to the surface of the inner seal member 22 with an adhesive.
次に、第1止水シート12の幅方向の一端部(左端部)を内側シール部材22の表面に重合した状態で、第1止水シート12の表面側から内側シール部材22の貫通孔22aの位置を確認し、きり等の工具を用いて内側シール部材22の貫通孔22aに対応する第1止水シート12の部分に貫通孔22aに連通する貫通孔12aを設ける。
なお、第1止水シートを現場に搬入する前に、予め第1止水シート12の幅方向の両端部に貫通孔12aを設けておいてもよい。
Next, in a state where one end portion (left end portion) in the width direction of the first water blocking sheet 12 is superposed on the surface of the inner sealing member 22, the through hole 22 a of the inner sealing member 22 from the surface side of the first water blocking sheet 12. The through hole 12a communicating with the through hole 22a is provided in the portion of the first water blocking sheet 12 corresponding to the through hole 22a of the inner seal member 22 using a tool such as a drill.
In addition, you may provide the through-hole 12a in the both ends of the width direction of the 1st water stop sheet | seat 12 previously before carrying in a 1st water stop sheet | seat on the spot.
次に、図9に示すように、第1止水シート12の幅方向の一端部(左端部)の表面に外側シール部材23を重合し、外側シール部材23の貫通孔23aを第1止水シート12の貫通孔12aに合致させ、この状態で外側シール部材23を第1止水シート12の表面に接着剤によって一体に接合する。 Next, as shown in FIG. 9, the outer seal member 23 is superposed on the surface of one end portion (left end portion) in the width direction of the first water stop sheet 12, and the through hole 23 a of the outer seal member 23 is formed into the first water stop The outer seal member 23 is integrally joined to the surface of the first water-stop sheet 12 with an adhesive in such a state that it matches the through hole 12a of the sheet 12.
次に、図10に示すように、外側シール部材23の表面に外側支持部材24を重合し、外側支持部材24の貫通孔24aを外側シール部材23の貫通孔23aに合致させ、仮固定する。例えば、外側支持部材24を外側シール部材23の表面に接着剤により一体に接合する。 Next, as shown in FIG. 10, the outer support member 24 is superposed on the surface of the outer seal member 23, and the through hole 24 a of the outer support member 24 is matched with the through hole 23 a of the outer seal member 23 and temporarily fixed. For example, the outer support member 24 is integrally bonded to the surface of the outer seal member 23 with an adhesive.
次に、図11に示すように、ねじ締結体26の締結ねじ27に補助ナット29、ワッシャ30、及び補助シール部材25をそれらの順に取り付ける。そして、図12に示すように、外側支持部材24の表面側から、締結ねじ27を外側支持部材24の貫通孔24a、外側シール部材23の貫通孔23a、第1止水シート12の貫通孔12a、内側シール部材22の貫通孔22a、及び内側支持部材21の貫通孔21a内を貫通させ、締結ねじ27の先端部を内側支持部材21の裏面側の締結ナット28に螺合させて締め付ける。 Next, as shown in FIG. 11, the auxiliary nut 29, the washer 30, and the auxiliary seal member 25 are attached to the fastening screw 27 of the screw fastening body 26 in that order. Then, as shown in FIG. 12, from the surface side of the outer support member 24, the fastening screw 27 is inserted into the through hole 24 a of the outer support member 24, the through hole 23 a of the outer seal member 23, and the through hole 12 a of the first water blocking sheet 12. Then, the through hole 22a of the inner seal member 22 and the through hole 21a of the inner support member 21 are passed through, and the distal end portion of the fastening screw 27 is screwed into the fastening nut 28 on the back surface side of the inner support member 21 and tightened.
そして、図13に示すように、補助ナット29を締め付け、ワッシャ30を介して補助シール部材25の突起25bを外側支持部材24の表面に圧接させ、内側シール部材22と外側シール部材23との間で第1止水シート12の幅方向の一端部(左端部)を水密に挟持固定する。 Then, as shown in FIG. 13, the auxiliary nut 29 is tightened, and the protrusion 25 b of the auxiliary seal member 25 is pressed against the surface of the outer support member 24 via the washer 30, so that the gap between the inner seal member 22 and the outer seal member 23 is reached. Then, one end portion (left end portion) of the first waterstop sheet 12 in the width direction is sandwiched and fixed in a watertight manner.
次に、図14に示すように、隣接する右側の芯材3のフランジ4に取り付けられている内側支持部材21の表面に前述した手順と同様の手順によって内側シール部材22を接着剤によって一体に接合し、この状態で、第1止水シート12の幅方向の他端部(右端部)を隣接する右側の芯材3のフランジ4の側部4bに取り付けられている内側支持部材21の表面とフランジ4の表面4aとの間に架け渡し、第1止水シート12の右端部をテープ18によってフランジ4の表面4aに仮止めする。 Next, as shown in FIG. 14, the inner seal member 22 is integrated with the adhesive by the same procedure as described above on the surface of the inner support member 21 attached to the flange 4 of the adjacent right core 3. In this state, the surface of the inner support member 21 attached to the side portion 4b of the flange 4 of the right core member 3 adjacent to the other end portion (right end portion) of the first waterstop sheet 12 in the width direction. And the right end portion of the first water-stop sheet 12 is temporarily fixed to the surface 4 a of the flange 4 with the tape 18.
この場合、第1止水シート12の裏面側に取り付けられている導水部材31は、地中連続壁1の前面側の開削底部に設けられている貯水部に下端部が挿入され、第1止水シート12の裏面側に導水部材31による水路が形成される。 In this case, the water guide member 31 attached to the back surface side of the first water-stop sheet 12 has a lower end inserted into the water storage portion provided at the cut-off bottom portion on the front side of the underground continuous wall 1, A water channel by the water guiding member 31 is formed on the back surface side of the water sheet 12.
そして、図15に示すように、前述した手順と同様の手順により、第1止水シート12の他端部(右端部)の表面に外側シール部材22を重合し、外側シール部材22の表面に外側支持部材24を重合し、この状態でねじ締結体26の締結ねじ27を外側支持部材24の表面側から、外側支持部材24の貫通孔24a、外側シール部材23の貫通孔23a、第1止水シート12の貫通孔12a、内側シール部材22の貫通孔22a、及び内側支持部材21の貫通孔21a内を貫通させ、締結ねじ27の先端部を内側支持部材21の裏面側の締結ナット28に螺合させて締め付け、補助ナット29を締め付けてワッシャ30を介して補助シール部材25の突起25bを外側支持部材24の表面に圧接させ、内側シール部材22と外側シール部材23との間で第1止水シート12の幅方向の他端部(右端部)を水密に挟持固定する。そして、フランジ4の側部4bに合わせて第1止水シート12の他端部(右端部)の余長部分を切断する。 Then, as shown in FIG. 15, the outer seal member 22 is superposed on the surface of the other end (right end) of the first water-stop sheet 12 by the same procedure as described above, and the surface of the outer seal member 22 is overlapped. The outer support member 24 is superposed, and in this state, the fastening screw 27 of the screw fastening body 26 is passed from the surface side of the outer support member 24 to the through hole 24a of the outer support member 24, the through hole 23a of the outer seal member 23, and the first stop. The through hole 12 a of the water sheet 12, the through hole 22 a of the inner seal member 22, and the through hole 21 a of the inner support member 21 are penetrated, and the distal end portion of the fastening screw 27 is connected to the fastening nut 28 on the back side of the inner support member 21. The auxiliary nut 29 is tightened and the projection 25b of the auxiliary seal member 25 is pressed against the surface of the outer support member 24 via the washer 30 to tighten the inner seal member 22 and the outer seal member. Between the 3 other end portion in the width direction of the first water-stopping sheet 12 (right end portion) is sandwiched and fixed watertight. And the surplus length part of the other end part (right end part) of the 1st water stop sheet 12 is cut | disconnected according to the side part 4b of the flange 4. FIG.
そして、このような第1止水シート12の取付け作業を各隣接する芯材3のフランジ4間の壁面2aに対して行うことにより、地中連続壁1の壁体2の各隣接する芯材3のフランジ4間の壁面2aを止水することができる。 And the adjacent core material of the wall body 2 of the underground continuous wall 1 is performed by performing such attachment work of the 1st water stop sheet | seat 12 with respect to the wall surface 2a between the flanges 4 of each adjacent core material 3. The wall surface 2a between the three flanges 4 can be stopped.
そして、上記のように第1止水シート12を各隣接する芯材3のフランジ4間の壁面2aに取り付けた後に、図16に示すように、地中連続壁1の前面側の地盤を本体構造物35の底版部36を構築する位置まで更に深く掘り下げ、図17に示すように、底版部36に対向する地中連続壁1の下端部の隣接する芯材3のフランジ4間の壁面2aを平滑面6aに仕上げる。 And after attaching the 1st water stop sheet | seat 12 to the wall surface 2a between the flanges 4 of each adjacent core material 3 as mentioned above, as shown in FIG. 16, the ground of the front side of the underground continuous wall 1 is a main body. As shown in FIG. 17, the wall surface 2a between the flanges 4 of the adjacent core members 3 at the lower end of the underground continuous wall 1 facing the bottom slab portion 36 is dug deeper to the position where the bottom slab portion 36 of the structure 35 is constructed. Is finished to a smooth surface 6a.
そして、図18に示すように、地中連続壁1の本体構造物35の底版部36に対向する下端部に第2止水シート13を配置し、第2止水シート13によって地中連続壁1の下端部の全体を覆い、この状態で第2止水シート13の下端部を地中連続壁1の下端部に接着剤により一体に接合する。 And as shown in FIG. 18, the 2nd water stop sheet | seat 13 is arrange | positioned at the lower end part which opposes the bottom plate part 36 of the main body structure 35 of the underground continuous wall 1, and the underground continuous wall by the 2nd water stop sheet | seat 13 1 is covered, and the lower end portion of the second water-stop sheet 13 is integrally joined to the lower end portion of the underground continuous wall 1 with an adhesive in this state.
この場合、第2止水シート13と地中連続壁1の壁面2aとの間に各第1止水シート12の下端部を介在させた状態で、第2止水シート13の下端部を地中連続壁1の壁面2a及び芯材3のフランジ4の表面4aに接着剤により一体に接合する。 In this case, the lower end portion of the second waterproof sheet 13 is grounded with the lower end portion of each first waterproof sheet 12 interposed between the second waterproof sheet 13 and the wall surface 2a of the underground continuous wall 1. The intermediate continuous wall 1 and the surface 4a of the flange 4 of the core member 3 are integrally bonded with an adhesive.
また、第2止水シート13の下端部の芯材3のフランジ4の側部4bに対応する部分を連結手段20によってフランジ4の側部4bに一体に連結する。
この場合、連結手段20は、内側支持部材21及び内側シール部材22に第1止水シート12の連結手段20と共通のものを用いているが別体でもよい。外側シール部材23及び外側支持部材24に第1止水シート12の連結手段20と別体のものを用い、第1止水シート12の外側シール部材23及び外側支持部材24の下端と第2止水シート13の外側シール部材23及び外側支持部材24の上端との間に隙間を形成する。
Further, the portion corresponding to the side portion 4 b of the flange 4 of the core member 3 at the lower end portion of the second water-stop sheet 13 is integrally connected to the side portion 4 b of the flange 4 by the connecting means 20.
In this case, although the connection means 20 uses the same thing as the connection means 20 of the 1st water stop sheet 12 for the inner side support member 21 and the inner side sealing member 22, it may be a different body. The outer seal member 23 and the outer support member 24 are separate from the connecting means 20 of the first water-stop sheet 12, and the lower ends of the outer seal member 23 and the outer support member 24 of the first water-stop sheet 12 and the second stop. A gap is formed between the outer seal member 23 of the water sheet 13 and the upper end of the outer support member 24.
そして、上記の隙間を介して第2止水シート13を第1止水シート12の外側支持部材24の表面側に引き出し、第2止水シート13の上端部をテープ18によって第1止水シート12の外側支持部材24の表面に仮止めする。そして、この状態で、本体構造物35の底版部36となる部分に砕石37を所定の厚みで敷設し、砕石37の上部に捨てコンクリート38を所定の厚みで打設し、本体構造物35の底版部36を構築する。なお、19は、第2止水シート13と外側支持部材24とが緩衝するのを防止するための弾性体からなる緩衝材である。 And the 2nd water stop sheet 13 is pulled out to the surface side of the outer side supporting member 24 of the 1st water stop sheet 12 through said clearance gap, and the upper end part of the 2nd water stop sheet 13 is the 1st water stop sheet with the tape 18 Twelve outer support members 24 are temporarily fixed. In this state, the crushed stone 37 is laid with a predetermined thickness on the portion of the main body structure 35 that becomes the bottom plate portion 36, and the discarded concrete 38 is cast with a predetermined thickness on the crushed stone 37. The bottom plate part 36 is constructed. In addition, 19 is a buffer material made of an elastic body for preventing the second waterstop sheet 13 and the outer support member 24 from buffering.
そして、図19に示すように、第2止水シート13を本体構造物35の底版部36の表面側に折り返し、底版部36の表面に設けられている底版部36の表面を止水する第3止水シート14の端部に第2止水シート13の上端部を重合させ、重合部を接着剤によって一体に接合する。このようにして、第2止水シート13を設けることにより、地中連続壁1の下端部が止水されるとともに、地中連続壁1の下端部と本体構造物35の底版部36との間が止水されることになる。 Then, as shown in FIG. 19, the second waterstop sheet 13 is folded back to the surface side of the bottom plate portion 36 of the main body structure 35 to stop the surface of the bottom plate portion 36 provided on the surface of the bottom plate portion 36. 3 The upper end portion of the second water-stop sheet 13 is polymerized to the end portion of the water-stop sheet 14, and the overlap portion is integrally bonded with an adhesive. Thus, by providing the 2nd water stop sheet | seat 13, while the lower end part of the underground continuous wall 1 is water-stopped, between the lower end part of the underground continuous wall 1 and the bottom plate part 36 of the main body structure 35 The interval will be stopped.
そして、上記のように第1止水シート12、第2止水シート13、及び第3止水シート14を設けた後に、底版部36の上部に鉄筋を配筋し、コンクリートを打設することにより、本体構造物35を構築することができる。 And after providing the 1st water stop sheet | seat 12, the 2nd water stop sheet | seat 13, and the 3rd water stop sheet | seat 14 as mentioned above, a reinforcing bar is arranged on the upper part of the bottom plate part 36, and concrete is laid. Thus, the main body structure 35 can be constructed.
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10及び止水構造10の構築方法にあっては、地中連続壁1の隣接する芯材3のフランジ4間に第1止水シート12を設けて、第1止水シート12の幅方向の両端部を連結手段20によってフランジ4の側部4bに水密に一体に連結し、地中連続壁1の下端部に第2止水シート13を設けて、第2止水シート13によって地中連続壁1の下端部の全体を止水するとともに、第2止水シート13によって地中連続壁1の下端部と本体構造物35の底版部36との間を止水し、さらに、第3止水シート14によって本体構造物35の底版部36の表面36aを止水するように構成したので、地中連続壁1の芯材3のフランジ4の表面4aと本体構造物35との間に異物(第1止水シート12)が介在するようことはない。従って、地中連続壁1と本体構造物35との間で応力伝達を確実に行うことができる。 In the water stop structure 10 of the earth retaining wall 1 and the construction method of the water stop structure 10 according to the present embodiment configured as described above, the first is between the flanges 4 of the adjacent core members 3 of the underground continuous wall 1. The water stop sheet 12 is provided, both ends of the first water stop sheet 12 in the width direction are integrally connected to the side 4b of the flange 4 in a watertight manner by the connecting means 20, and the second end is connected to the lower end of the underground continuous wall 1. The water stop sheet 13 is provided, and the entire bottom end of the underground continuous wall 1 is stopped by the second water stop sheet 13, and the lower end of the underground continuous wall 1 and the main body structure are stopped by the second water stop sheet 13. 35, the surface 36a of the bottom plate portion 36 of the main body structure 35 is water-stopped by the third water-stop sheet 14, and therefore the core of the underground continuous wall 1 is stopped. Foreign matter (first water sealing sheet) between the surface 4a of the flange 4 of the material 3 and the main body structure 35 12) does not so interposed. Therefore, stress transmission can be reliably performed between the underground continuous wall 1 and the main body structure 35.
また、第1止水シート12は、両端部が連結手段20によって地中連続壁1の芯材3のフランジ4の側部4bに強固に連結され、第2止水シート13は下端部が地中連続壁1に接着剤によって強固に接合され、上端部が接着剤によって第3止水シート14に強固に接合されているので、地中連続壁1に作用する水圧によって第1止水シート12が地中連続壁1から剥離したり、第2止水シート13と地中連続壁1との接合部、及び第2止水シート13と第3止水シート14との接合部に剥がれが生じたりするようなことはなく、長期に亘って良好な止水性能を発揮することができ、地中連続壁1からの漏水が本体構造物35に発生するのを防止することができる。 Further, both ends of the first water-stop sheet 12 are firmly connected to the side portions 4b of the flange 4 of the core member 3 of the underground continuous wall 1 by the connecting means 20, and the lower end portion of the second water-stop sheet 13 is the ground. Since the middle continuous wall 1 is firmly joined with an adhesive and the upper end portion is firmly joined to the third water-stop sheet 14 with an adhesive, the first water-stop sheet 12 is caused by water pressure acting on the underground continuous wall 1. Peels from the underground continuous wall 1 or peels off at the joint between the second waterstop sheet 13 and the underground continuous wall 1 and at the joint between the second waterstop sheet 13 and the third waterstop sheet 14. The water stop performance can be exhibited over a long period of time, and water leakage from the underground continuous wall 1 can be prevented from occurring in the main body structure 35.
さらに、第1止水シート12の裏面側に導水部材31を設けて、導水部材31によって地中連続壁1に作用する雨水、湧水等の水を回収して貯水部に導き、貯水部から排水ポンプによって外部に排水するように構成したので、工事期間中は地中連続壁1に作用する雨水、湧水等の水圧を低減させることができ、第1止水シート12、第2止水シート13、及び第3止水シート14に作用する水圧を低減させることができる。 Further, a water guide member 31 is provided on the back surface side of the first water stop sheet 12, and water such as rain water and spring water acting on the underground continuous wall 1 is collected by the water guide member 31 and guided to the water storage unit, from the water storage unit. Since the drainage pump is configured to drain water to the outside, it is possible to reduce the water pressure such as rainwater and spring water acting on the underground continuous wall 1 during the construction period, and the first waterstop sheet 12 and the second waterstop. The water pressure acting on the sheet 13 and the third water stop sheet 14 can be reduced.
なお、上記の説明においては、地中連続壁1の壁体2の充填材にコンクリート6を用いた例をについて説明したが、コンクリート6の代わりにソイルセメントを用いてもよいものであり、その場合にも同様の作用効果を奏するものである。
また、前記の説明においては、地中連続壁1の芯材3としてH型鋼を用いた例について説明したが、C型鋼、I型鋼等の他の鋼材を用いてもよいものであり、その場合にも同様の作用効果を奏する。
In the above description, the example in which concrete 6 is used as the filler of the wall body 2 of the underground continuous wall 1 has been described. However, soil cement may be used instead of the concrete 6, In this case, the same effects can be obtained.
In the above description, an example in which H-shaped steel is used as the core material 3 of the underground continuous wall 1 has been described. However, other steel materials such as C-shaped steel and I-shaped steel may be used. Has the same effect.
1 土留壁(地中連続壁)
2 壁体 2a 壁面 3 芯材
4 フランジ 4a 表面 4b 側部
5 リブ 6 充填材(コンクリート) 6a 平滑面
10 止水構造 11 止水手段 12 第1止水シート
12a 貫通孔 13 第2止水シート 14 第3止水シート
15 防水シール 16 防護材 17 被覆材
18 テープ 19 緩衝材 20 連結手段
21 内側支持部材 21a 貫通孔 22 内側シール部材
22a 貫通孔 23 外側シール部材 23a 貫通孔
24 外側支持部材 24a 貫通孔 25 補助シール部材
25a 貫通孔 25b 貫通孔 26 ねじ締結体
27 締結ねじ 27a 頭部 28 締結ナット
29 補助ナット 30 ワッシャ 31 導水手段(導水部材)
35 本体構造物 36 底版部 36a 表面
37 砕石 38 捨てコンクリート
1 retaining wall (continuous underground wall)
DESCRIPTION OF SYMBOLS 2 Wall body 2a Wall surface 3 Core material 4 Flange 4a Surface 4b Side part 5 Rib 6 Filler (concrete) 6a Smooth surface 10 Water stop structure 11 Water stop means 12 1st water stop sheet 12a Through-hole 13 2nd water stop sheet 14 Third waterproof sheet 15 Waterproof seal 16 Protective material 17 Cover material 18 Tape 19 Buffer material 20 Connecting means 21 Inner support member 21a Through hole 22 Inner seal member 22a Through hole 23 Outer seal member 23a Through hole 24 Outer support member 24a Through hole 25 Auxiliary seal member 25a Through hole 25b Through hole 26 Screw fastening body 27 Fastening screw 27a Head 28 Fastening nut 29 Auxiliary nut 30 Washer 31 Water guide means (water guide member)
35 Main body structure 36 Bottom plate part 36a Surface 37 Crushed stone 38 Discarded concrete
Claims (9)
前記土留壁の前記本体構造物側の壁面に設けられて、前記土留壁の隣接する芯材間を止水する止水手段と、該止水手段を前記芯材に水密に連結する連結手段と、前記止水手段に設けられて前記土留壁に作用する水を回収し、該水を貯水部に導く導水手段とを備えてなることを特徴とする土留壁の止水構造。 When using a retaining wall in which a plurality of steel cores are embedded in the interior of the wall at intervals, a retaining structure for retaining the retaining wall to stop the retaining wall,
A water stopping means provided on a wall surface of the earth retaining wall on the main body structure side to stop water between adjacent core members of the earth retaining wall; and a connecting means for water-tightly connecting the water stopping means to the core member. A water retaining structure for a retaining wall, comprising: a water guiding means that is provided in the water retaining means and collects water acting on the retaining wall and guides the water to a water storage section.
前記土留壁の構築後に、前記土留壁の前記本体構造物側の壁面を削って前記芯材の表面を露出させるとともに、前記芯材の側部に予め取り付けておいた支持部材の表面を露出させる工程と、
裏面側に予め導水部材を取り付けておいた第1止水シートの両端部を一対のシール部材間で挟持し、この状態で前記第1止水シートの両端部を前記支持部材の表面側に重合させ、さらに外側のシール部材の表面側に前記支持部材と対となる支持部材を重合させ、前記外側の支持部材、外側のシール部材、第1止水シート、内側のシール部材、及び内側の支持部材に締結ねじを貫通させ、該締結ねじに締結ナットを螺合させて締め付けることにより、前記第1止水シートの端部を前記芯材の側部に水密に連結する工程と、
前記土留壁の前記本体構造物の底版部に対向する下端部の壁面の全体に第2止水シートを配置し、該第2止水シートの下端部を内側に前記第1止水シートの下端部を介在させた状態で該下端部の壁面に水密に一体に接合し、該第2止水シートの上端部を前記本体構造物の底版部の表面上に折り返して、底版部の表面に配置されている第3止水シートに水密に一体に接合する工程とを備えていることを特徴とする土留壁の止水構造の構築方法。 This is a method for constructing a water retaining structure for a retaining wall in which the retaining wall is water-stopped when a retaining wall in which a plurality of steel cores are embedded in the interior of the wall is spaced apart. And
After the construction of the retaining wall, the wall surface of the retaining wall on the main body structure side is shaved to expose the surface of the core material, and the surface of the support member previously attached to the side portion of the core material is exposed. Process,
The both ends of the first water stop sheet with the water guide member attached in advance to the back side are sandwiched between the pair of seal members, and in this state, the both ends of the first water stop sheet are superposed on the surface side of the support member. Further, a support member paired with the support member is superposed on the surface side of the outer seal member, and the outer support member, the outer seal member, the first water blocking sheet, the inner seal member, and the inner support A step of watertightly connecting an end portion of the first water-stop sheet to a side portion of the core member by passing a fastening screw through the member and screwing and fastening a fastening nut to the fastening screw;
A second water-stop sheet is disposed on the entire wall surface of the lower end portion of the main wall structure facing the bottom plate portion of the main retaining wall, and the lower end portion of the first water-stop sheet is placed inside the lower end portion of the second water-stop sheet. In the state where the part is interposed, it is integrally joined to the wall surface of the lower end part in a water-tight manner, and the upper end part of the second water-stop sheet is folded back on the surface of the bottom part of the main body structure and arranged on the surface of the bottom part. A method for constructing a water retaining structure for a retaining wall, comprising: a step of watertightly and integrally joining a third water stopping sheet.
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JP2011117198A (en) * | 2009-12-03 | 2011-06-16 | Ohbayashi Corp | Earth retaining structure and construction method of the same |
KR102499826B1 (en) * | 2022-03-02 | 2023-02-14 | 주식회사 제일엔지니어링종합건축사사무소 | Self supporte structure using reinforcrd thumbd pile and construction method for the same |
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JPH04221130A (en) * | 1990-12-20 | 1992-08-11 | Toda Constr Co Ltd | Advanced engineering method for basement roof waterproofing |
JP2001193089A (en) * | 2000-01-14 | 2001-07-17 | Yoshida Kensetsu Kogyo Kk | Waterproofing method for continuous underground wall |
JP2003301456A (en) * | 2002-04-11 | 2003-10-24 | Shimizu Corp | Composite underground wall and execution method therefor, and cut-off material expandable with water |
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JPH04221130A (en) * | 1990-12-20 | 1992-08-11 | Toda Constr Co Ltd | Advanced engineering method for basement roof waterproofing |
JP2001193089A (en) * | 2000-01-14 | 2001-07-17 | Yoshida Kensetsu Kogyo Kk | Waterproofing method for continuous underground wall |
JP2003301456A (en) * | 2002-04-11 | 2003-10-24 | Shimizu Corp | Composite underground wall and execution method therefor, and cut-off material expandable with water |
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JP2011117198A (en) * | 2009-12-03 | 2011-06-16 | Ohbayashi Corp | Earth retaining structure and construction method of the same |
KR102499826B1 (en) * | 2022-03-02 | 2023-02-14 | 주식회사 제일엔지니어링종합건축사사무소 | Self supporte structure using reinforcrd thumbd pile and construction method for the same |
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