JP2010144469A - Construction method of intended underground outer wall, underground outer wall and earth retaining wall - Google Patents

Construction method of intended underground outer wall, underground outer wall and earth retaining wall Download PDF

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JP2010144469A
JP2010144469A JP2008325395A JP2008325395A JP2010144469A JP 2010144469 A JP2010144469 A JP 2010144469A JP 2008325395 A JP2008325395 A JP 2008325395A JP 2008325395 A JP2008325395 A JP 2008325395A JP 2010144469 A JP2010144469 A JP 2010144469A
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wall
retaining wall
underground
plate
underground outer
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Hiroyuki Hotta
洋之 堀田
Tadashi Sakamoto
忠 坂本
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of an intended underground outer wall capable of preferably constructing the intended underground outer wall by the use of a temporary earth retaining wall, and to provide the underground outer wall and the earth retaining wall which are constructed by using the method. <P>SOLUTION: A plurality of H-section steel pieces 4 are embedded in a soil-cement column row wall 3 at specified intervals, and plate-shaped members 5 are embedded with both the side edges 5a, 5b of the plate-shaped members 5 engaged between both the flanges 4a, 4b of the adjacent H-section steel pieces 4, thereby constructing the earth retaining wall 1. Subsequently, the internal soil G surrounded by the earth retaining wall 1 is excavated, and the soil-cement 3 is cut, thereby exposing the flanges 4a of the H-section steel pieces 4 of the earth retaining wall 1 and one surface 5c of the plate-shaped members. In addition, reinforcing bars 7 are arranged at the inner side of the earth retaining wall 1, and concrete 8 is poured so as to construct a reinforced concrete wall 9, thereby constructing the intended underground outer wall A which is integrally constituted of the H-section steel pieces 4 of the earth retaining wall 1, the plate-shaped members 5 and the reinforced concrete wall 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、本設の地下外壁の構築方法及び地下外壁並びに山留め壁に関する。   The present invention relates to a construction method of a basement outer wall, a basement outer wall, and a mountain retaining wall.

従来、建築構造物の地下工事では（地下構造物を構築する際には）、例えば多軸掘削機を用いてソイルセメント柱列壁を構築するとともに、ソイルセメント柱列壁の内部にＨ形鋼などの応力材（芯材）を建て込んで仮設の山留め壁を構築する。そして、この山留め壁で側方地山からの側圧を支持させ、水平方向の変形を抑えながら地盤を掘削してゆき、山留め壁の内側に新たに本設の地下外壁を構築するようにしている。   Conventionally, in underground construction of a building structure (when constructing an underground structure), for example, a soil cement column wall is constructed using a multi-axis excavator, and an H-shaped steel is formed inside the soil cement column wall. A temporary mountain retaining wall is constructed by installing a stress material (core material). And this mountain retaining wall supports the lateral pressure from the side ground, excavates the ground while suppressing horizontal deformation, and constructs a new underground outer wall inside the retaining wall .

しかしながら、このように本設の地下外壁を構築する場合には、山留め壁の応力材が残置される場合であっても、応力材の剛性が地下外壁の剛性に算入されないため、過剰設計になっているという現状がある。また、本設の地下外壁の外側に仮設の山留め壁のための空間が必要になるため、外壁線が敷地境界線に近い場合には余裕がなく施工が困難になる。さらに、地盤を掘削した後に改めて地下外壁を構築することになるため、多大な施工手間を要するとともに、工期が長期化するという欠点もある。   However, when constructing the underground outer wall in this way, even if the stress material of the retaining wall is left behind, the rigidity of the stress material is not included in the rigidity of the underground outer wall. There is a current situation. In addition, since a space for a temporary retaining wall is required outside the main underground wall, if the outer wall line is close to the site boundary line, there is no room and construction becomes difficult. Furthermore, since the underground outer wall is constructed again after excavating the ground, it requires a lot of construction work and has a drawback that the construction period is prolonged.

これに対し、例えば、鉄筋コンクリート造の地中連続壁を山留め壁及び本設の地下外壁として用いる方法が知られている。   On the other hand, for example, a method is known in which a reinforced concrete underground continuous wall is used as a retaining wall and a main underground wall.

また、ソイルセメント柱列壁の内部に応力材として特殊なプレキャストコンクリート板を連続的に挿入して山留め壁を構築し、地盤の掘削後にプレキャストコンクリート板の上下端を梁で定着してそのまま地下外壁として用いる方法もある（例えば、特許文献１参照）。
特開平６−１７４１９号公報 In addition, a special precast concrete plate is inserted into the soil cement column wall continuously as a stress material to construct a retaining wall, and after excavation of the ground, the upper and lower ends of the precast concrete plate are fixed with beams, and the underground outer wall is left as it is. There is also a method used as (see, for example, Patent Document 1).
JP-A-6-17419

しかしながら、地中連続壁を山留め壁及び本設の地下外壁として用いる方法は、実績もあるが、施工費用が高く、本設躯体としてのコンクリートの品質管理が難しい。このため、近年ではあまり用いられていないのが現状である。   However, the method of using the underground continuous wall as the retaining wall and the underground underground wall has a track record, but the construction cost is high and it is difficult to control the quality of the concrete as the permanent frame. For this reason, it is the present condition that it is not used so much in recent years.

一方、ソイルセメント柱列壁の内部にプレキャストコンクリート板を挿入して山留め壁を構築し、山留め壁の応力材として用いたプレキャストコンクリート板をそのまま地下外壁として利用する方法においても、隣り合うプレキャストコンクリート板の側端面が密着していないと地下外壁として不都合が生じるため、プレキャストコンクリート板の施工精度、地下外壁としての止水性を確保するのが難しく、現実的にはその適用が困難である。   On the other hand, a precast concrete plate is also inserted in the soil cement column wall to construct a retaining wall, and the precast concrete plate used as the stress material of the retaining wall is used as an underground outer wall as it is. If the side end surfaces of the steel plates are not in close contact with each other, inconvenience occurs as an underground outer wall. Therefore, it is difficult to ensure the construction accuracy of the precast concrete plate and the water-stopping property as the underground outer wall.

本発明は、上記事情に鑑み、仮設の山留め壁を利用して好適に本設の地下外壁を構築することが可能な本設の地下外壁の構築方法及びこの方法を用いて構築した地下外壁並びに山留め壁を提供することを目的とする。   In view of the above circumstances, the present invention provides a construction method of a permanent underground outer wall capable of suitably constructing a permanent underground outer wall using a temporary mountain retaining wall, an underground outer wall constructed using this method, and The purpose is to provide a retaining wall.

上記の目的を達するために、この発明は以下の手段を提供している。   In order to achieve the above object, the present invention provides the following means.

本発明の本設の地下外壁の構築方法は、仮設の山留め壁を利用して本設の地下外壁を構築する方法であって、ソイルセメント柱列壁の内部にＨ形鋼を所定の間隔をあけて複数埋設するとともに、隣り合う前記Ｈ形鋼のそれぞれの両フランジの間に両側端部をそれぞれ係合させながら板状部材を埋設して、前記山留め壁を構築し、前記山留め壁で囲まれた内側の地盤を掘削するとともにソイルセメントを切削して、前記山留め壁の前記Ｈ形鋼の一方のフランジ及び前記板状部材の一面を露出させ、前記山留め壁の内側に鉄筋を配筋するとともに後打ちコンクリートを打設して鉄筋コンクリート壁部を構築し、前記山留め壁の前記Ｈ形鋼及び前記板状部材と前記鉄筋コンクリート壁部とが一体化してなる本設の地下外壁を構築するようにしたことを特徴とする。   The construction method of the present underground underground wall of the present invention is a method of constructing a permanent underground outer wall using a temporary retaining wall, and the H-shaped steel is placed at a predetermined interval inside the soil cement column wall. A plurality of holes are embedded, and plate-like members are embedded while engaging both end portions between the flanges of the adjacent H-shaped steels to construct the retaining wall, and are surrounded by the retaining wall. Excavating the ground inside and cutting the soil cement to expose one surface of the H-shaped steel of the retaining wall and one surface of the plate-like member, and arrange reinforcing bars inside the retaining wall In addition, a reinforced concrete wall is constructed by placing post-cast concrete, and a permanent underground outer wall is formed by integrating the H-shaped steel and the plate-like member of the retaining wall with the reinforced concrete wall. What you did And features.

また、本発明の地下外壁は、上記の本設の地下外壁の構築方法によって構築され、前記山留め壁の前記Ｈ形鋼及び前記板状部材と前記鉄筋コンクリート壁部とが一体化して構成されていることを特徴とする。   Moreover, the underground outer wall of this invention is constructed | assembled by the construction method of said underground underground outer wall, and the said H-shaped steel of the said retaining wall and the said plate-shaped member, and the said reinforced concrete wall part are comprised integrally. It is characterized by that.

さらに、本発明の山留め壁は、上記の本設の地下外壁の構築方法によって構築され、前記ソイルセメント柱列壁の内部に前記Ｈ形鋼を所定の間隔をあけて複数埋設するとともに、隣り合うＨ形鋼のそれぞれの両フランジの間に両側端部をそれぞれ係合させながら板状部材を埋設して構成されていることを特徴とする。   Further, the mountain retaining wall of the present invention is constructed by the above-described construction method of the underground underground wall, and a plurality of the H-shaped steels are embedded in the interior of the soil cement column wall at a predetermined interval and adjacent to each other. A plate-like member is embedded while engaging both end portions between both flanges of the H-shaped steel.

このような本設の地下外壁の構築方法及び地下外壁並びに山留め壁の発明においては、ソイルセメント柱列壁を構築した後に、このソイルセメント柱列壁の内部に応力材（芯材）としてのＨ形鋼を建て込んで埋設するとともに、板状部材を埋設して山留め壁を構築する。このため、山留め壁は、Ｈ形鋼に加えて板状部材、場合によってはソイルセメントも含めた複合構造体としての挙動（剛性）を確認、評価することで、より合理的な設計が可能になる。また、両側端部をＨ形鋼のフランジの間に係合させ、板状部材をＨ形鋼に案内させながらソイルセメント柱列壁の内部に埋設することも可能になるため、板状部材を所定位置に精度よく容易に配設することが可能になる。   In such a construction method of the underground outer wall and the invention of the underground outer wall and the mountain retaining wall, after the soil cement column wall is constructed, H as a stress material (core material) is formed inside the soil cement column wall. In addition to embedding and embedding the shape steel, plate-like members are embedded to construct the retaining wall. For this reason, it is possible to design the retaining wall more rationally by checking and evaluating the behavior (rigidity) as a composite structure including plate-shaped members and, in some cases, soil cement, in addition to H-shaped steel. Become. In addition, it is possible to embed the plate-like member inside the soil cement column wall while engaging both end portions between the flanges of the H-shaped steel and guiding the plate-shaped member to the H-shaped steel. It becomes possible to dispose at a predetermined position accurately and easily.

また、山留め壁を構築した後に、地盤を掘削するとともにソイルセメントを切削し、山留め壁のＨ形鋼及び板状部材と一体化して鉄筋コンクリート壁部を構築することにより、本設の地下外壁を山留め壁のＨ形鋼及び板状部材と鉄筋コンクリート壁部の複合構造体（合成壁）として構築することが可能になる。このため、本設の地下外壁の設計は、山留め壁のＨ形鋼及び板状部材と鉄筋コンクリート壁部の複合構造体としての剛性を評価することが可能になる。   In addition, after building the retaining wall, excavating the ground and cutting the soil cement, and integrating the H-shaped steel and plate-like member of the retaining wall to construct the reinforced concrete wall portion, the existing underground outer wall is secured to the mountain. It becomes possible to construct | assemble as a composite structure (composite wall) of the H-shaped steel and plate-shaped member of a wall, and a reinforced concrete wall part. For this reason, the design of the underground underground wall of this installation can evaluate the rigidity as a composite structure of the H-shaped steel and plate member of the retaining wall and the reinforced concrete wall.

本発明の本設の地下外壁の構築方法及び地下外壁並びに山留め壁によれば、山留め壁は、Ｈ形鋼に加えて板状部材、場合によってはソイルセメントも含めた複合構造体としての挙動（剛性）を確認、評価することで、より合理的な設計が可能になる。また、両側端部をＨ形鋼のフランジの間に係合させ、板状部材をＨ形鋼に案内させながらソイルセメント柱列壁の内部に埋設することも可能になるため、板状部材を所定位置に精度よく容易に配設することが可能になる。   According to the construction method of the underground outer wall and the underground outer wall and the mountain retaining wall according to the present invention, the mountain retaining wall behaves as a composite structure including a plate-shaped member and, in some cases, soil cement in addition to the H-shaped steel ( By checking and evaluating (rigidity), more rational design is possible. In addition, it is possible to embed the plate-like member inside the soil cement column wall while engaging both end portions between the flanges of the H-shaped steel and guiding the plate-shaped member to the H-shaped steel. It becomes possible to dispose at a predetermined position accurately and easily.

さらに、本設の地下外壁を山留め壁のＨ形鋼及び板状部材と鉄筋コンクリート壁部の複合構造体（合成壁）として構築することが可能になるため、本設の地下外壁の設計は、山留め壁のＨ形鋼及び板状部材と鉄筋コンクリート壁部の複合構造体としての剛性を評価することが可能になる。   Furthermore, since it is possible to construct the existing underground outer wall as a composite structure (composite wall) of H-shaped steel and plate-shaped members of the retaining wall and the reinforced concrete wall, the design of the installed underground outer wall is It is possible to evaluate the rigidity of the composite structure of the H-shaped steel and plate-like member of the wall and the reinforced concrete wall.

そして、上記のようにソイルセメント柱列壁にＨ形鋼と板状部材を埋設して山留め壁として利用した後に、内側に鉄筋コンクリート壁部を一体に構築して本設の地下外壁とすることにより、地下外壁の過剰設計を防ぎ、外周部の必要空間を小さくすることが可能になる。また、地下外壁の全てを場所打ちコンクリートで構築する場合と比較して工期を大幅に短縮することが可能になるとともに、内側のみを後打ちコンクリートとして鉄筋コンクリート壁部を構築することにより止水性を確保することも可能になる。   And after embedding H section steel and a plate-like member in the soil cement column wall as mentioned above and using it as a mountain retaining wall, the reinforced concrete wall part is built integrally inside, and it is used as a permanent underground outer wall. It is possible to prevent excessive design of the underground outer wall and reduce the required space on the outer periphery. In addition, it is possible to significantly shorten the construction period compared to the case of constructing all of the underground outer walls with cast-in-place concrete, and to ensure water-stopping by constructing the reinforced concrete wall with only the inside as post-cast concrete It is also possible to do.

以下、図１から図６を参照し、本発明の一実施形態に係る本設の地下外壁の構築方法及び地下外壁並びに山留め壁について説明する。本実施形態は、地下構造物を構築する際に仮設の山留め壁を利用して本設の地下外壁を構築する方法及びこの方法を用いて構築した地下外壁並びに山留め壁に関するものである。   Hereinafter, with reference to FIGS. 1-6, the construction method of the underground underground wall, underground underground wall, and mountain retaining wall which concern on one Embodiment of this invention are demonstrated. The present embodiment relates to a method of constructing a permanent underground outer wall using a temporary retaining wall when constructing an underground structure, and an underground outer wall and a retaining wall constructed using this method.

本実施形態の本設の地下外壁の構築方法では（地下構造物を構築する際には）、はじめに、図１から図３に示すように、地下構造物の外周部に山留め壁１を構築する。   In the construction method of the underground underground wall according to the present embodiment (when constructing an underground structure), first, as shown in FIGS. 1 to 3, the mountain retaining wall 1 is constructed on the outer periphery of the underground structure. .

本実施形態の山留め壁１を構築する際には、はじめに、図１（ａ）及び図１（ｂ）に示すように、例えば複数のアースオーガを備えた多軸型掘削機２を用いて所定深度まで地盤Ｇを掘削しながらセメントミルクを注入撹拌して、地下構造物の外周部に沿って連続的にソイルセメント柱列壁３を構築する。   When constructing the retaining wall 1 of the present embodiment, first, as shown in FIG. 1A and FIG. 1B, for example, a predetermined number is used using a multi-axis excavator 2 having a plurality of earth augers. Cement milk is poured and stirred while excavating the ground G to the depth, and the soil cement column wall 3 is continuously constructed along the outer periphery of the underground structure.

ついで、図２（ａ）及び図２（ｂ）に示すように、ソイルセメント柱列壁３の内部に、所定の間隔をあけて応力材（芯材）のＨ形鋼４を建て込んで埋設する。このとき、Ｈ形鋼４は、一方のフランジ４ａと他方のフランジ４ｂがソイルセメント柱列壁３の延設方向Ｔに沿うように埋設され、ソイルセメント柱列壁３の延設方向Ｔに隣り合うＨ形鋼４の一方のフランジ４ａ同士及び他方のフランジ４ｂ同士が同一平面状に配されるように埋設される。   Next, as shown in FIGS. 2 (a) and 2 (b), an H-section steel 4 of a stress material (core material) is embedded and embedded in the interior of the soil cement column wall 3 at a predetermined interval. To do. At this time, the H-shaped steel 4 is embedded so that one flange 4 a and the other flange 4 b are along the extending direction T of the soil cement column wall 3, and adjacent to the extending direction T of the soil cement column wall 3. One flange 4a and the other flange 4b of the matching H-section steel 4 are embedded so as to be arranged in the same plane.

また、ソイルセメント柱列壁３の内部にＨ形鋼４を埋設するとともに、図３（ａ）及び図３（ｂ）に示すように、プレキャストコンクリート製で平板状の板状部材（ＰＣ板５）を建て込んで埋設する。このＰＣ板５は、Ｈ形鋼４の両フランジ４ａ、４ｂの間隔（ウェブ４ｃの長さ）よりも小さな厚さで、且つ隣り合うＨ形鋼４の間隔（隣り合うＨ形鋼４のウェブ４ｃ同士の間隔）よりも小さな幅で形成されている。そして、ＰＣ板５は、その両側端部５ａ、５ｂをそれぞれ隣り合うＨ形鋼４の両フランジ４ａ、４ｂの間に挿入して係合させながら、これら隣り合うＨ形鋼４の間に架設するように挿入して埋設される。   Further, the H-section steel 4 is embedded in the soil cement column wall 3 and, as shown in FIGS. 3 (a) and 3 (b), a plate-like plate member (PC plate 5) made of precast concrete. ) And embed. The PC plate 5 has a thickness smaller than the distance between the flanges 4a and 4b of the H-shaped steel 4 (the length of the web 4c) and the distance between the adjacent H-shaped steels 4 (the web of the adjacent H-shaped steel 4). (Interval between 4c). The PC plate 5 is constructed between the adjacent H-shaped steels 4 while inserting the both side end portions 5a, 5b between the flanges 4a, 4b of the adjacent H-shaped steels 4 and engaging them. Inserted and buried.

このように、両側端部５ａ、５ｂをＨ形鋼４のフランジ４ａ、４ｂの間に係合させ、ＰＣ板５をＨ形鋼４に案内させながらソイルセメント柱列壁３の内部に埋設することが可能になるため、確実に且つ容易に一面５ｃ及び他面５ｄをＨ形鋼４のフランジ４ａ、４ｂと平行に配した所定位置にＰＣ板５を精度よく容易に配設することが可能になる。   In this way, both end portions 5 a and 5 b are engaged between the flanges 4 a and 4 b of the H-section steel 4, and the PC plate 5 is guided to the H-section steel 4 and embedded in the soil cement column wall 3. Therefore, the PC plate 5 can be accurately and easily disposed at a predetermined position in which the one surface 5c and the other surface 5d are arranged in parallel with the flanges 4a and 4b of the H-section steel 4 reliably and easily. become.

このようにして、従来のソイルセメント（ソイルセメント柱列壁３）と応力材のＨ形鋼４に加え、ＰＣ板５を備えてなる本実施形態の山留め壁１が構築される。そして、このように構成した本実施形態の山留め壁１においては、Ｈ形鋼４に加えてＰＣ板５も応力材として機能する。このため、Ｈ形鋼４に加えてＰＣ板５、場合によってはソイルセメント３も含めた複合構造体としての挙動（剛性）を確認、評価することによって、従来の山留め壁と比較し、より合理的な設計が可能になる。   In this way, the retaining wall 1 of the present embodiment including the PC plate 5 in addition to the conventional soil cement (soil cement column wall 3) and the H-shaped steel 4 of the stress material is constructed. And in the mountain retaining wall 1 of this embodiment comprised in this way, in addition to the H-section steel 4, the PC board 5 also functions as a stress material. For this reason, by confirming and evaluating the behavior (rigidity) as a composite structure including PC plate 5 and, in some cases, soil cement 3 in addition to H-section steel 4, it is more rational than conventional retaining walls. Design becomes possible.

ついで、上記のように山留め壁１を構築した段階で、図４（a）及び図４（ｂ）に示すように、山留め壁１で囲まれた内側（掘削範囲）の地盤Ｇを所定の深度まで掘削する。このとき、地盤Ｇを掘削するとともにソイルセメント３を切削して、Ｈ形鋼４の一方のフランジ４ａ及びＰＣ板５の一面５ｃを露出させる。   Next, when the retaining wall 1 is constructed as described above, as shown in FIGS. 4 (a) and 4 (b), the ground G on the inner side (excavation range) surrounded by the retaining wall 1 has a predetermined depth. Drill until. At this time, the ground G is excavated and the soil cement 3 is cut to expose one flange 4 a of the H-section steel 4 and one surface 5 c of the PC plate 5.

ついで、図５（ａ）及び図５（ｂ）に示すように、山留め壁１の内側の地盤Ｇ上に地下構造物の基礎６を構築するとともに、山留め壁１の内面に沿って鉄筋７を配筋する。そして、図６（ａ）及び図６（ｂ）に示すように、型枠を設置し、後打ちコンクリート８を打設して、地下構造物の外壁の内側部分となる鉄筋コンクリート壁部９を構築する。このとき、鉄筋コンクリート壁部９の鉄筋７を埋設するように後打ちコンクリート８を打設するとともに、この後打ちコンクリート８に山留め壁１のＨ形鋼４の一方のフランジ４ａが埋設され、また、この後打ちコンクリート８がＰＣ板５の一面５ｃに密着する。これにより、鉄筋コンクリート壁部９が、山留め壁１のＨ形鋼４及びＰＣ板５と一体化して構築され、外壁内側部分の鉄筋コンクリート壁部９と、外壁外側部分の山留め壁１を一体化した合成壁として本設の地下外壁Ａ（地下構造物の外壁）が構築される。   Next, as shown in FIGS. 5 (a) and 5 (b), the foundation 6 of the underground structure is constructed on the ground G inside the retaining wall 1, and the reinforcing bars 7 are disposed along the inner surface of the retaining wall 1. Arrange the bars. Then, as shown in FIGS. 6 (a) and 6 (b), a formwork is installed and post-cast concrete 8 is laid to construct a reinforced concrete wall 9 that is the inner part of the outer wall of the underground structure. To do. At this time, while placing the post-cast concrete 8 so as to embed the reinforcing bar 7 of the reinforced concrete wall portion 9, one flange 4a of the H-section steel 4 of the retaining wall 1 is buried in the post-cast concrete 8, The post-cast concrete 8 is in close contact with the one surface 5c of the PC board 5. As a result, the reinforced concrete wall portion 9 is constructed integrally with the H-shaped steel 4 and the PC board 5 of the retaining wall 1, and the reinforced concrete wall portion 9 of the outer wall inner portion and the retaining wall 1 of the outer wall outer portion are integrated. The main underground wall A (outer wall of the underground structure) is constructed as the wall.

なお、山留め壁１の内側の地盤Ｇを掘削するとともにソイルセメント３を切削してＨ形鋼４の一方のフランジ４ａ及びＰＣ板５の一面５ｃを露出させた段階（図４（ａ）及び図４（ｂ）の段階）で、ＰＣ板５の一面５ｃの目荒らしを行ったり、Ｈ形鋼４の一方のフランジ４ａのフランジ面やＰＣ板５の一面５ｃにスタッドなどを取り付けて、山留め壁１と鉄筋コンクリート壁部９をより強固に一体化させるようにしてもよい。   The ground G inside the retaining wall 1 is excavated and the soil cement 3 is cut to expose one flange 4a of the H-section steel 4 and one surface 5c of the PC plate 5 (FIG. 4 (a) and FIG. 4 (b)), roughening the one surface 5c of the PC plate 5, or attaching a stud or the like to the flange surface of one flange 4a of the H-shaped steel 4 or the one surface 5c of the PC plate 5, 1 and the reinforced concrete wall 9 may be integrated more firmly.

そして、上記のように構築した本実施形態の地下外壁Ａにおいては、山留め壁１のＨ形鋼４及びＰＣ板５と、鉄筋コンクリート壁部９との複合構造体（合成壁）として構築することが可能になる。このため、本設の地下外壁Ａの設計は、山留め壁１のＨ形鋼４及びＰＣ板５と鉄筋コンクリート壁部９の複合構造体としての剛性を評価することが可能になる。   And in the underground outer wall A of this embodiment constructed | assembled as mentioned above, it can construct | assemble as a composite structure (composite wall) with the H-section steel 4 and PC board 5 of the retaining wall 1, and the reinforced concrete wall part 9. FIG. It becomes possible. For this reason, the design of the underground underground wall A of the present installation can evaluate the rigidity as a composite structure of the H-shaped steel 4 and PC plate 5 of the retaining wall 1 and the reinforced concrete wall portion 9.

したがって、本実施形態の本設の地下外壁Ａの構築方法及び地下外壁Ａ並びに山留め壁１においては、上記のようにソイルセメント柱列壁３にＨ形鋼４とＰＣ板５を埋設して山留め壁１として利用した後に、内側に鉄筋コンクリート壁部９を一体に構築して本設の地下外壁Ａとすることにより、地下外壁Ａの過剰設計を防ぎ、外周部の必要空間を小さくすることが可能になる。また、地下外壁Ａの全てを場所打ちコンクリートで構築する場合と比較して工期を大幅に短縮することが可能になるとともに、内側のみを後打ちコンクリート８として鉄筋コンクリート壁部９を構築することにより止水性を確保することも可能になる。   Therefore, in the construction method of the underground outer wall A and the underground outer wall A and the mountain retaining wall 1 of the present embodiment, the H-section steel 4 and the PC plate 5 are embedded in the soil cement column wall 3 as described above. After being used as the wall 1, the reinforced concrete wall 9 is integrally constructed on the inside to form a permanent underground outer wall A, thereby preventing excessive design of the underground outer wall A and reducing the required space on the outer periphery. become. In addition, it is possible to significantly shorten the construction period compared with the case where all of the underground outer wall A is constructed by cast-in-place concrete, and the construction can be stopped by constructing the reinforced concrete wall portion 9 by using only the inside as post-cast concrete. It is also possible to ensure aqueous properties.

以上、本発明に係る本設の地下外壁の構築方法及びこの方法を用いて構築した地下外壁並びに山留め壁の一実施形態について説明したが、本発明は上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、板状部材がＰＣ板（プレキャストコンクリート板）５であるものとして説明を行ったが、本発明に係る板状部材は、例えば図７に示すように、鋼材をトラス状に組み立てて構成されていてもよく、この場合においても、板状部材５をＨ形鋼４に係合させながらソイルセメント柱列壁３の内部に埋設することで本実施形態と同様の効果を得ることが可能である。よって、本発明に係る板状部材は、特にＰＣ板５に限定する必要はない。   As mentioned above, although the construction method of the underground underground wall according to the present invention and the embodiment of the underground outer wall and the mountain retaining wall constructed by using this method have been described, the present invention is not limited to the above embodiment. However, it can be changed as appropriate without departing from the spirit of the invention. For example, in the present embodiment, the plate member is described as being a PC plate (precast concrete plate) 5, but the plate member according to the present invention is made of a steel material in a truss shape as shown in FIG. 7, for example. In this case, the same effect as that of the present embodiment can be obtained by embedding the plate-like member 5 in the soil cement column wall 3 while engaging the H-shaped steel 4. It is possible to obtain. Therefore, the plate-like member according to the present invention need not be limited to the PC plate 5 in particular.

本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁のソイルセメント柱列壁を構築している状態を示す図である。It is a figure which shows the state which is building the soil cement pillar row | line | column wall of a mountain retaining wall in the construction | assembly method of the underground underground wall which concerns on one Embodiment of this invention. 本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁のソイルセメント柱列壁の内部にＨ形鋼を埋設した状態を示す図である。It is a figure which shows the state which embedded H-section steel inside the soil-cement column wall of the retaining wall in the construction method of the underground underground wall which concerns on one Embodiment of this invention. 本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁のソイルセメント柱列壁の内部にＰＣ板（板状部材）を埋設した状態（山留め壁を構築した状態）を示す図である。In the construction method of the underground underground wall according to one embodiment of the present invention, a state in which a PC plate (plate-like member) is embedded inside the soil cement column wall of the retaining wall (a state where the retaining wall is constructed) is shown. FIG. 本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁の内側の地盤を掘削するとともにソイルセメントを切削した状態を示す図である。It is a figure which shows the state which excavated the ground inside a retaining wall and cut the soil cement in the construction method of the underground underground outer wall which concerns on one Embodiment of this invention. 本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁の内側に鉄筋コンクリート壁部の鉄筋を配筋した状態を示す図である。It is a figure which shows the state which arranged the reinforcing bar of the reinforced concrete wall part inside the mountain retaining wall in the construction method of the underground underground wall which concerns on one Embodiment of this invention. 本発明の一実施形態に係る本設の地下外壁の構築方法において、山留め壁の内側に後打ちコンクリートを打設して鉄筋コンクリート壁部を構築した状態（本設の地下外壁を構築した状態）を示す図である。In the construction method of the underground underground wall according to the embodiment of the present invention, a state in which the reinforced concrete wall portion is constructed by placing the post-cast concrete inside the retaining wall (the state where the underground underground wall is constructed) FIG. 本発明に係る板状部材の変形例を示す図である。It is a figure which shows the modification of the plate-shaped member which concerns on this invention.

符号の説明Explanation of symbols

１ 山留め壁
２ 多軸型掘削機
３ ソイルセメント柱列壁（ソイルセメント）
４ Ｈ形鋼
４ａ 一方のフランジ
４ｂ 他方のフランジ
４ｃ ウェブ
５ ＰＣ板
５ａ 側端部
５ｂ 側端部
５ｃ 一面
５ｄ 他面
６ 基礎
７ 鉄筋
８ 後打ちコンクリート
９ 鉄筋コンクリート壁部
Ａ 本設の地下外壁
Ｇ 地盤 1 Mountain retaining wall 2 Multi-axis excavator 3 Soil cement column wall (Soil cement)
4 H-section steel 4a One flange 4b The other flange 4c Web 5 PC plate 5a Side end 5b Side end 5c One side 5d Other side 6 Foundation 7 Reinforcement 8 Post-cast concrete 9 Reinforced concrete wall A Ground basement underground wall G Ground

Claims (3)

仮設の山留め壁を利用して本設の地下外壁を構築する方法であって、
ソイルセメント柱列壁の内部にＨ形鋼を所定の間隔をあけて複数埋設するとともに、隣り合う前記Ｈ形鋼のそれぞれの両フランジの間に両側端部をそれぞれ係合させながら板状部材を埋設して、前記山留め壁を構築し、
前記山留め壁で囲まれた内側の地盤を掘削するとともにソイルセメントを切削して、前記山留め壁の前記Ｈ形鋼の一方のフランジ及び前記板状部材の一面を露出させ、
前記山留め壁の内側に鉄筋を配筋するとともに後打ちコンクリートを打設して鉄筋コンクリート壁部を構築し、
前記山留め壁の前記Ｈ形鋼及び前記板状部材と前記鉄筋コンクリート壁部とが一体化してなる本設の地下外壁を構築するようにしたことを特徴とする本設の地下外壁の構築方法。 A method of constructing a main underground wall using a temporary retaining wall,
A plurality of H-section steels are embedded in the interior of the soil cement column wall at a predetermined interval, and the plate-like members are fitted while engaging both end portions between the flanges of the adjacent H-section steels. Burying, building the retaining wall,
Excavating the inner ground surrounded by the retaining wall and cutting the soil cement to expose one flange of the H-shaped steel and one surface of the plate member of the retaining wall;
Reinforcing bars inside the mountain retaining wall and constructing a reinforced concrete wall by placing post-cast concrete,
A construction method of a permanent underground outer wall, wherein a permanent underground outer wall is constructed by integrating the H-shaped steel and the plate-like member of the mountain retaining wall and the reinforced concrete wall portion. 請求項１記載の本設の地下外壁の構築方法によって構築され、前記山留め壁の前記Ｈ形鋼及び前記板状部材と前記鉄筋コンクリート壁部とが一体化して構成されていることを特徴とする地下外壁。   It is constructed | assembled by the construction method of the permanent underground outer wall of Claim 1, and the said H-shaped steel of the said mountain retaining wall, the said plate-shaped member, and the said reinforced concrete wall part are comprised integrally, and it is comprised. outer wall. 請求項１記載の本設の地下外壁の構築方法によって構築され、前記ソイルセメント柱列壁の内部に前記Ｈ形鋼を所定の間隔をあけて複数埋設するとともに、隣り合うＨ形鋼のそれぞれの両フランジの間に両側端部をそれぞれ係合させながら板状部材を埋設して構成されていることを特徴とする山留め壁。   It is constructed | assembled by the construction method of the underground underground wall of the main installation of Claim 1, and while embedding two or more said H-section steel in the inside of the said soil-cement column wall, each of adjacent H-section steel A mountain retaining wall characterized in that a plate-like member is embedded while both end portions are engaged between both flanges.
JP2008325395A 2008-12-22 2008-12-22 Construction method of intended underground outer wall, underground outer wall and earth retaining wall Pending JP2010144469A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108661076A (en) * 2017-04-02 2018-10-16 杭州南联地基基础工程有限公司 Meet ground and goes along with sb. to guard him the underground pipe gallery integration drag mode construction method of construction requirement
JP2020186618A (en) * 2019-05-17 2020-11-19 株式会社大林組 Wall-shaped structure and method for constructing wall-shaped structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972319A (en) * 1982-10-18 1984-04-24 Tekken Kensetsu Co Ltd Underground continuous wall work utilizing soil pillar-row wall

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972319A (en) * 1982-10-18 1984-04-24 Tekken Kensetsu Co Ltd Underground continuous wall work utilizing soil pillar-row wall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108661076A (en) * 2017-04-02 2018-10-16 杭州南联地基基础工程有限公司 Meet ground and goes along with sb. to guard him the underground pipe gallery integration drag mode construction method of construction requirement
JP2020186618A (en) * 2019-05-17 2020-11-19 株式会社大林組 Wall-shaped structure and method for constructing wall-shaped structure
JP7275844B2 (en) 2019-05-17 2023-05-18 株式会社大林組 WALL-LIKE STRUCTURE AND METHOD OF CONSTRUCTING WALL-LIKE STRUCTURE

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