JP2013194460A - Construction method of earth-retaining wall - Google Patents

Construction method of earth-retaining wall Download PDF

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JP2013194460A
JP2013194460A JP2012064627A JP2012064627A JP2013194460A JP 2013194460 A JP2013194460 A JP 2013194460A JP 2012064627 A JP2012064627 A JP 2012064627A JP 2012064627 A JP2012064627 A JP 2012064627A JP 2013194460 A JP2013194460 A JP 2013194460A
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soil cement
column
core material
flange
retaining wall
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JP5869388B2 (en
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Hiroyasu Ono
博康 小野
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Kumagai Gumi Co Ltd
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Kumagai Gumi Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a construction method of an earth-retaining wall, capable of exposing a surface of a core material by simple work.SOLUTION: In a method of constructing an earth-retaining wall for which a surface of a core material is exposed by forming a column row 11 of soil cement columns 8 on ground 9, erecting the core material inside each soil cement column of the column row, excavating the ground surrounded by the column row after soil cement of the column row is cured, and removing the soil cement on the excavated side of the column row, the core material with a covering material, for which the covering material (plate material 5) for covering a surface 4 of the core material (H-section steel 1) is attached to the surface, is erected inside an uncured soil cement column 8, and after soil cement 7 inside the soil cement column 8 is cured, the ground 9 surrounded by the column row 11 of the soil cement columns 8 is excavated, and the covering material is released to expose the surface of the core material.

Description

本発明は、地下構造物等を構築する際の立坑の山留め壁を構築する方法に関する。   The present invention relates to a method for constructing a retaining wall of a shaft when constructing an underground structure or the like.

従来、建築や土木の地下構造物等を構築するために立坑を施工する場合の山留め壁（土留め壁）の構築は、以下のように行われている。
アースオーガ機により地盤に連続して孔を削孔し、この削孔した土とセメントとベントナイトの液を攪拌して、土中にソイルセメントの柱を形成し、そのソイルセメント内に芯材としてのＨ形鋼を挿入し、ソイルセメントを固化させてソイルセメント柱列を構築する。そして、ソイルセメント柱列を構築後に、地盤を根切りし、かつ、ソイルセメント柱列中のＨ形鋼の一方のフランジの表面を露出させることによって、山留め壁が構築される。
つまり、山留め壁の表面に地下構造物の壁を構築するに際してソイルセメント柱列中のＨ形鋼の一方のフランジの表面を覆っているソイルセメント（異物）が残っていることは好ましくないという理由や、ソイルセメント柱列中のＨ形鋼の一方のフランジの表面に山止め支保工をその他の鋼材等を溶接できるようにするという理由から、ソイルセメント柱列中のＨ形鋼の一方のフランジの表面を露出させるようにしている。
このソイルセメント柱列中のＨ形鋼の一方のフランジの表面を露出させるために、当該一方のフランジの表面を覆っているソイルセメントをはつり取る作業を、重機を用いて、又は、人力で行っていたが、当該はつり作業は大変であった。つまり、重機を用いたはつり作業は、重機の操作が難しく、熟練した操作者が必要である。また、人力によるはつり作業は、手間が掛かり大変であった。
そこで、Ｈ形鋼に張設自在な絶縁フィルムを設けた特殊Ｈ形鋼を形成し、絶縁フィルムを根切り側に向けて特殊Ｈ形鋼を未硬化のソイルセメント柱内に貫入し、該ソイルセメント柱内に絶縁フィルムを張設しかつ連設させて縁切り面を形成しておいて、当該縁切り面を境にしてはつり作業を行えるようにしたことで、はつり作業を容易にした山留め壁の構築方法が知られている（特許文献１参照）。 Conventionally, the construction of a retaining wall (earth retaining wall) in the case of constructing a shaft for constructing a building or an underground structure of civil engineering is performed as follows.
Holes are continuously drilled in the ground using an earth auger machine, and the soil, cement, and bentonite liquid are agitated to form soil cement pillars in the soil. The H-shaped steel is inserted, and the soil cement is solidified to construct the soil cement column. Then, after the soil cement column is constructed, a ground retaining wall is constructed by rooting the ground and exposing the surface of one flange of the H-shaped steel in the soil cement column.
In other words, it is not preferable that the soil cement (foreign matter) covering the surface of one flange of the H-section steel in the soil cement column array remains when the wall of the underground structure is constructed on the surface of the retaining wall. Also, one flange of the H-section steel in the soil-cement column row is made because it is possible to weld other steel materials to the surface of one flange of the H-section steel in the soil-cement column row. The surface is exposed.
In order to expose the surface of one flange of the H-section steel in this soil cement column, the work of removing the soil cement covering the surface of the one flange is performed using a heavy machine or manually. However, the suspension work was difficult. In other words, the lifting work using heavy machinery is difficult to operate heavy machinery and requires a skilled operator. In addition, the lifting work by human power is laborious and difficult.
Therefore, a special H-shaped steel with an insulating film that can be stretched on the H-shaped steel is formed, and the special H-shaped steel is inserted into an unhardened soil cement column with the insulating film facing the root cutting side. An insulating film is stretched and connected to the cement pillar to form a cut edge, and the hanging work can be carried out with the cut edge as a boundary. A construction method is known (see Patent Document 1).

特開平０６−７３７２７号公報Japanese Patent Laid-Open No. 06-73727

しかしながら、特許文献１の方法では、特殊Ｈ形鋼を未硬化のソイルセメント柱内に貫入した後に、絶縁フィルムを引き上げるので、引き上げる際に、Ｈ形鋼の表面とフィルムとの間にソイルセメントが入り込んで硬化してしまうため、Ｈ形鋼の表面に硬化したソイルセメントがこびりついてしまい、フィルムを剥がしてもＨ形鋼の表面がきれいに露出しない。従って、芯材としてのＨ形鋼の表面を露出させるためにＨ形鋼の表面にこびりついているソイルセメントをはつり取る作業が必要になり、Ｈ形鋼の表面を露出させる作業が大変であるという問題点があった。
本発明は、簡単な作業で、芯材の表面を露出させることができる山留め壁の構築方法を提供する。 However, in the method of Patent Document 1, the insulating film is pulled up after penetrating the special H-section steel into the unhardened soil cement pillar, and therefore, when the pull-up is performed, there is a soil cement between the surface of the H-section steel and the film. Since it penetrates and hardens, the hardened soil cement sticks to the surface of the H-shaped steel, and even if the film is peeled off, the surface of the H-shaped steel is not exposed cleanly. Accordingly, in order to expose the surface of the H-shaped steel as the core material, it is necessary to work to remove the soil cement stuck to the surface of the H-shaped steel, and the work to expose the surface of the H-shaped steel is difficult. There was a problem.
The present invention provides a method for constructing a retaining wall capable of exposing the surface of a core material with a simple operation.

本発明に係る山留め壁の構築方法は、地盤にソイルセメント柱の柱列を形成し、当該柱列の各ソイルセメント柱内に芯材を建て込み、柱列のソイルセメントが硬化した後に、柱列で囲まれた地盤を根切りするとともに、柱列の根切り側のソイルセメントを除去して芯材の表面を露出させた山留め壁を構築する方法において、前記芯材の表面に当該表面を覆う被覆材が取付けられた被覆材付き芯材を未硬化のソイルセメント柱内に建て込んで、ソイルセメント柱内のソイルセメントが硬化した後に、ソイルセメント柱の柱列で囲まれた地盤を根切りするとともに、前記被覆材を剥がして前記芯材の表面を露出させたので、被覆材を剥がすという簡単な作業で、芯材の表面を露出させることができる。
また、前記被覆材として、ソイルセメントが硬化した後に芯材の表面より剥がす際に、芯材の表面と向かい合う面とは反対側の面に付着していたソイルセメントをソイルセメント柱から剥がす強度を有したものを用いたので、被覆材を連続的に剥がすことができて、芯材の表面を露出させる作業をより簡単に行える。
また、被覆材として、板材を用いたので、てこの原理により小さい力で容易に板材を連続的に剥がすことができて、芯材の表面を露出させる作業をより簡単に行える。 The method for constructing a retaining wall according to the present invention includes forming a column of soil cement columns in the ground, building a core material in each of the soil cement columns of the column row, and hardening the column cement soil column. In the method of constructing a retaining wall in which the soil surrounded by the row is rooted and the soil cement on the side of the column row is removed to expose the surface of the core material, the surface is applied to the surface of the core material. After the core material with the covering material to which the covering material is attached is built in the unhardened soil cement pillar and the soil cement in the soil cement pillar is hardened, the ground surrounded by the column of the soil cement pillar is rooted. Since the surface of the core material was exposed by cutting the covering material, the surface of the core material can be exposed by a simple operation of removing the covering material.
Further, as the covering material, when the soil cement is hardened and peeled off from the surface of the core material, the strength of peeling off the soil cement attached to the surface opposite to the surface facing the surface of the core material from the soil cement pillar. Since what has was used, a coating | covering material can be peeled continuously and the operation | work which exposes the surface of a core material can be performed more easily.
Further, since a plate material is used as the covering material, the plate material can be easily and continuously peeled off with a smaller force based on the principle of the lever, and the work of exposing the surface of the core material can be performed more easily.

被覆材を剥がす状態を示した斜視図。The perspective view which showed the state which peels a coating | covering material. 山留め壁構築方法に使用する板材付きＨ形鋼を示す斜視図。The perspective view which shows the H-section steel with a plate material used for the mountain retaining wall construction method. 板材付きＨ形鋼を建て込んだソイルセメント柱の柱列を示す横断面図。The cross-sectional view which shows the column row | line | column of the soil cement pillar which built in the H-section steel with a board | plate material. 板材付きＨ形鋼を建て込んだソイルセメント柱を示す縦断面図（図３のＡ−Ａ断面相当図）。The longitudinal cross-sectional view which shows the soil cement pillar which incorporated the H-section steel with a board | plate material (AA cross-section equivalent figure of FIG. 3). 山留め壁に囲まれた立坑を示す断面図。Sectional drawing which shows the vertical shaft surrounded by the mountain retaining wall. 山留め壁構築方法に使用する板材付きＨ形鋼を示す斜視図。The perspective view which shows the H-section steel with a plate material used for the mountain retaining wall construction method.

実施形態１
実施形態１による山留め壁構築方法では、図２に示すように、芯材としてのＨ形鋼１と、Ｈ形鋼１の一方のフランジ２の表面４（後述するウェブ３と繋がっていない方の表面）に当該表面４を覆うように取付けられた被覆材としての板材５と、を備えた板材付きＨ形鋼６を用いる。
Ｈ形鋼１は、ウェブ３と呼ばれる長尺基板の両端に位置する長辺縁に、当該長尺基板の基板面と直交して互いに平行に対向するように一対のフランジ２；２と呼ばれる長尺板が設けられて、断面Ｈ形に形成された構成である。
板材５としては、例えば、板厚数ｍｍ程度（例えば３ｍｍ）のベニヤ板を用いた。 Embodiment 1
In the mountain retaining wall construction method according to the first embodiment, as shown in FIG. 2, an H-section steel 1 as a core material and a surface 4 of one flange 2 of the H-section steel 1 (one not connected to a web 3 described later). A plate-shaped H-section steel 6 provided with a plate material 5 as a covering material attached to the surface) so as to cover the surface 4 is used.
The H-shaped steel 1 has a long side called a pair of flanges 2; 2 at long edges located at both ends of a long substrate called a web 3 so as to face each other in parallel to the substrate surface of the long substrate. A scale plate is provided, and the cross section is formed in an H shape.
As the plate material 5, for example, a veneer plate having a plate thickness of about several mm (for example, 3 mm) was used.

そして、板材付きＨ形鋼６を、ソイルセメント７が硬化していない未硬化のソイルセメント柱８内に、一方のフランジ２の表面４を地盤９の根切り側１０に向けて建て込む（図３；図４参照）。ソイルセメント柱８の柱列１１内のソイルセメント７が硬化した後に、柱列１１で囲まれた地盤９を根切りするとともに、図１に示すように、板材５を剥がしてＨ形鋼１の一方のフランジ２の表面４を露出させる。   Then, the plate-shaped H-shaped steel 6 is built in the uncured soil cement column 8 where the soil cement 7 is not hardened, with the surface 4 of one flange 2 facing the root cutting side 10 of the ground 9 (see FIG. 3; see FIG. After the soil cement 7 in the column 11 of the soil cement column 8 has hardened, the ground 9 surrounded by the column 11 is rooted and the plate material 5 is peeled off as shown in FIG. The surface 4 of one flange 2 is exposed.

板材５としては、図１に示すように、ソイルセメント７が硬化した後にＨ形鋼１の一方のフランジ２の表面４より剥がす際に、表面４と向かい合う面１２とは反対側の面１３（面１２の裏面）に付着していたソイルセメント７１をソイルセメント柱８から剥がす強度を有した板材を用いた。   As shown in FIG. 1, when the sheet cement 7 is hardened and peeled off from the surface 4 of one flange 2 of the H-section steel 1, a surface 13 opposite to the surface 12 facing the surface 4 ( The board | plate material which had the intensity | strength which peels the soil cement 71 adhering to the back surface of the surface 12 from the soil cement pillar 8 was used.

実施形態１による山留め壁構築方法を説明する。
まず、図３；４に示すように、地盤９に連続して孔２０を削孔した孔列を形成する。次に、削孔した土とセメントとベントナイトの液とを孔２０内で攪拌して、地盤９にソイルセメント柱８の柱列１１を形成する。
また、図２に示すように、Ｈ形鋼１の一方のフランジ２の表面４に当該一方のフランジ２の表面４を覆う被覆材としての板材５を接着剤等で取付けた板材付きＨ形鋼６を工場又は現場で作成しておく。
図３；４に示すように、ソイルセメント７が硬化していない未硬化の各ソイルセメント柱８内にそれぞれ板材付きＨ形鋼６を建て込む。尚、板材５は、当該板材付きＨ形鋼６をソイルセメント柱８内に建て込む際に、Ｈ形鋼１の一方のフランジ２の表面４から剥がれない程度に表面４に取付けられていればよい。
ソイルセメント柱８内のソイルセメント７の硬化を待ち、ソイルセメント柱８内のソイルセメント７が硬化した後に、ソイルセメント柱８の柱列１１で囲まれた地盤９を根切りするとともに、図１に示すように、板材５を剥がしてＨ形鋼１の一方のフランジ２の表面４を露出させる。
板材５をＨ形鋼１の一方のフランジ２の表面４から剥がす際には、図外の平蚤のような一端縁が鋭利に形成された平板を鋭利な一端縁側から板材５の一端（上端）とＨ形鋼１の一方のフランジ２の表面４との間に挿入していくとともに板材５を一端側から表面４より離れるように引き剥がして行くことで、表面４と向かい合う面１２とは反対側の面１３に付着していたソイルセメント７１がソイルセメント柱８から剥がれていく（図１参照）。
互いに隣り合うＨ形鋼１；１の一方のフランジ２；２の表面４と表面４との間に残留するソイルセメント７２（図１参照）をはつって除去し、互いに隣り合うＨ形鋼１；１の一方のフランジ２；２の表面４と表面４との間の面が表面４とほぼ同じ平面上に位置されるようにならして山留め壁１００（図５参照）が構築される。
この山留め壁１００に表面に腹おこしのような山止め支保工鋼材１０１を組んで、立坑１０２を掘り下げていく、当該立坑１０２に地下構造物を立ち上げて構築する（図５参照）。 A mountain retaining wall construction method according to the first embodiment will be described.
First, as shown in FIGS. 3 and 4, a hole row in which the holes 20 are continuously drilled in the ground 9 is formed. Next, the drilled soil, cement, and bentonite liquid are stirred in the hole 20 to form the column array 11 of the soil cement columns 8 on the ground 9.
In addition, as shown in FIG. 2, the H-shaped steel with a plate material in which a plate material 5 as a covering material covering the surface 4 of the one flange 2 is attached to the surface 4 of one flange 2 of the H-shaped steel 1 with an adhesive or the like. 6 is prepared at the factory or in the field.
As shown in FIGS. 3 and 4, the H-shaped steel 6 with a plate material is built in each uncured soil cement column 8 where the soil cement 7 is not hardened. The plate 5 is attached to the surface 4 to the extent that it does not peel from the surface 4 of one flange 2 of the H-section steel 1 when the H-section steel 6 with the plate is built in the soil cement column 8. Good.
The soil cement 7 in the soil cement pillar 8 waits for hardening, and after the soil cement 7 in the soil cement pillar 8 is hardened, the ground 9 surrounded by the pillar row 11 of the soil cement pillar 8 is rooted, and FIG. As shown in FIG. 3, the plate material 5 is peeled off to expose the surface 4 of one flange 2 of the H-section steel 1.
When the plate member 5 is peeled off from the surface 4 of one flange 2 of the H-section steel 1, a flat plate having one edge that is sharply formed, such as an unillustrated flat plate, is attached to one end (upper end) of the plate member 5 from the sharp one edge side. ) And the surface 4 of one of the flanges 2 of the H-section steel 1 and the surface 5 facing the surface 4 by separating the plate 5 away from the surface 4 from one end side. The soil cement 71 adhering to the opposite surface 13 is peeled off from the soil cement column 8 (see FIG. 1).
Soil cement 72 (see FIG. 1) remaining between the surface 4 and the surface 4 of one flange 2; 2 of the H-section steel 1; 1 adjacent to each other is removed, and the H-section steel 1 adjacent to each other is removed. A retaining wall 100 (see FIG. 5) is constructed such that the surface between the surface 4 and the surface 4 of the one flange 2; 1 is positioned on substantially the same plane as the surface 4;
The mountain retaining wall 101 is assembled with a mountain retaining support material 101 like a belly on the surface, and the shaft 102 is dug down, and an underground structure is set up on the shaft 102 (see FIG. 5).

即ち、実施形態１によれば、図３に示すように、板材付きＨ形鋼６が建て込まれたソイルセメント柱８内のソイルセメント７が硬化した後、Ｈ形鋼１の一方のフランジ２の表面４よりも根切り側１０に位置する不要なソイルセメント７０を除去するに際して、図１に示すように、板材５をＨ形鋼１の一方のフランジ２の表面４から剥がしてＨ形鋼１の一方のフランジ２の表面４を露出させ、かつ、互いに隣り合うＨ形鋼１；１の一方のフランジ２；２の表面４と表面４との間に残留するソイルセメント７２をはつって除去する。
従って、実施形態によれば、板材５を剥がすという簡単な作業で、Ｈ形鋼１の一方のフランジ２の表面４をきれいに露出させることができる。
また、被覆材として、ソイルセメント７が硬化した後にＨ形鋼１の一方のフランジ２の表面４より剥がす際に、面１３に付着していたソイルセメント７１をソイルセメント柱８から剥がす強度を有した板材５を用いたので、板材５の上端を持って、てこの原理により小さい力で容易に板材５を連続的に剥がすことができて、Ｈ形鋼１の表面４を露出させる作業をより簡単に行えるようになる。 That is, according to the first embodiment, as shown in FIG. 3, after the soil cement 7 in the soil cement column 8 in which the plate-shaped H-section steel 6 is built is hardened, one flange 2 of the H-section steel 1 is provided. When removing the unnecessary soil cement 70 located on the root cutting side 10 with respect to the surface 4 of the steel, the plate material 5 is peeled off from the surface 4 of one flange 2 of the H-shaped steel 1 as shown in FIG. The surface 4 of the one flange 2 is exposed and the H-section steel 1 adjacent to each other; the soil cement 72 remaining between the surface 4 and the surface 4 of the one flange 2; Remove.
Therefore, according to the embodiment, the surface 4 of one flange 2 of the H-section steel 1 can be exposed cleanly by a simple operation of peeling the plate material 5.
Further, as a covering material, when the soil cement 7 is hardened and peeled off from the surface 4 of one flange 2 of the H-section steel 1, the soil cement 71 attached to the surface 13 has a strength to peel off from the soil cement column 8. Since the plate member 5 is used, the plate member 5 can be easily peeled off continuously with a smaller force with the upper end of the plate member 5 and the surface 4 of the H-section steel 1 can be exposed. It becomes easy to do.

実施形態２
図６に示すように、芯材としてのＨ形鋼１と、Ｈ形鋼１の一方のフランジ２の表面４に当該表面４を覆うように取付けられた表面被覆材としての板材５と、Ｈ形鋼１の一方のフランジ２の表面４の長辺縁側の端面４０を覆うように取付けられた端面被覆材としての板材４１と、を備えた板材付きＨ形鋼６０を用いれば、板材５と表面４との間にソイルセメント７が侵入し難くなり、板材５を剥がすという簡単な作業で、Ｈ形鋼１の一方のフランジ２の表面４をよりきれいに露出させることができる。 Embodiment 2
As shown in FIG. 6, an H-section steel 1 as a core material, a plate 5 as a surface covering material attached to a surface 4 of one flange 2 of the H-section steel 1 so as to cover the surface 4, and H If an H-shaped steel 60 with a plate material provided with a plate material 41 as an end surface covering material attached so as to cover the end surface 40 on the long edge side of the surface 4 of one flange 2 of the shape steel 1 is used, The soil cement 7 becomes difficult to enter between the surface 4 and the surface 4 of one flange 2 of the H-section steel 1 can be exposed more cleanly by a simple operation of peeling the plate material 5.

実施形態３
実施形態１において、板材５とＨ形鋼１の一方のフランジ２の表面４との間にソイルセメント７が侵入しないように、かつ、板材付きＨ形鋼６をソイルセメント柱８内に建て込む際に板材５がずれたり外れたりしないように、Ｈ形鋼１の一方のフランジ２の側縁面２１（図２参照）と板材５の側縁面５１（図２参照）とを覆うように図外の接着テープを取付けることで一方のフランジ２の表面４を覆うように板材５を取付けてもよい。この場合、接着テープを板材５の幅方向（板材５の短手方向）に延長するように設けて接着テープを板材５及びフランジ２の側縁面２１に接着させかつ接着テープの両端部を一方のフランジ２の裏面２２；２２（図２参照）に接着することで、Ｈ形鋼１の一方のフランジ２の側縁面２１と板材５の側縁面５１とを覆うように接着テープを取付けてもよいし、接着テープをＨ形鋼１の一方のフランジ２の側縁面２１に沿って延長するように設けて接着テープを板材５とフランジ２とに跨るように接着することで、Ｈ形鋼１の一方のフランジ２の側縁面２１と板材５の側縁面５１とを覆うように接着テープを取付けてもよい。
また、実施形態２において、板材５とＨ形鋼１の一方のフランジ２の表面４との間にソイルセメント７が侵入しないように、かつ、板材付きＨ形鋼６をソイルセメント柱８内に建て込む際に板材５がずれたり外れたりしないように、板材４１の外表面４２（図６参照）及び板材５の側縁面５１（図６参照）を覆うように図外の接着テープを取付けることで一方のフランジ２の表面４を覆うように一方のフランジ２に板材５及び板材４１を取付けてもよい。この場合も、接着テープを板材５の幅方向に延長するように設けて接着テープを板材５及び板材４１の外表面４２に接着させてかつ接着テープの両端部を一方のフランジ２の裏面２２；２２（図６参照）に接着することで、板材４１の外表面４２と板材５の側縁面５１とを覆うように接着テープを取付けてもよいし、接着テープをＨ形鋼１の一方のフランジ２の側縁面２１に沿って延長するように設けて接着テープを板材５と板材４１の外表面４２とフランジ２の裏面２２とに跨るように接着することで、板材４１の外表面４２と板材５の側縁面５１とを覆うように接着テープを取付けてもよい。 Embodiment 3
In the first embodiment, the H-shaped steel 6 with a plate material is built in the soil cement column 8 so that the soil cement 7 does not enter between the plate material 5 and the surface 4 of one flange 2 of the H-shaped steel 1. At this time, the side edge surface 21 (see FIG. 2) of one flange 2 of the H-section steel 1 and the side edge surface 51 (see FIG. 2) of the plate material 5 are covered so that the plate material 5 is not displaced or detached. You may attach the board | plate material 5 so that the surface 4 of one flange 2 may be covered by attaching the adhesive tape outside a figure. In this case, the adhesive tape is provided so as to extend in the width direction of the plate material 5 (short direction of the plate material 5), and the adhesive tape is adhered to the plate material 5 and the side edge surface 21 of the flange 2, and both ends of the adhesive tape are attached to one side. The adhesive tape is attached so as to cover the side edge surface 21 of one flange 2 of the H-section steel 1 and the side edge surface 51 of the plate 5 by bonding to the back surface 22; 22 (see FIG. 2) of the flange 2 of Alternatively, the adhesive tape may be provided so as to extend along the side edge surface 21 of one flange 2 of the H-section steel 1 and the adhesive tape is bonded so as to straddle the plate material 5 and the flange 2. You may attach an adhesive tape so that the side edge surface 21 of the one flange 2 of the shape steel 1 and the side edge surface 51 of the board | plate material 5 may be covered.
In the second embodiment, the H-steel with plate 6 is placed in the soil cement column 8 so that the soil cement 7 does not enter between the plate 5 and the surface 4 of one flange 2 of the H-section steel 1. Attach an adhesive tape (not shown) so as to cover the outer surface 42 (see FIG. 6) of the plate material 41 and the side edge surface 51 (see FIG. 6) of the plate material 5 so that the plate material 5 does not shift or come off when building. Thus, the plate material 5 and the plate material 41 may be attached to one flange 2 so as to cover the surface 4 of the one flange 2. Also in this case, the adhesive tape is provided so as to extend in the width direction of the plate material 5, the adhesive tape is adhered to the outer surface 42 of the plate material 5 and the plate material 41, and both ends of the adhesive tape are attached to the back surface 22 of the one flange 2; 22 (see FIG. 6), an adhesive tape may be attached so as to cover the outer surface 42 of the plate material 41 and the side edge surface 51 of the plate material 5, and the adhesive tape is attached to one of the H-section steel 1. The outer surface 42 of the plate 41 is provided by extending along the side edge surface 21 of the flange 2 and bonding the adhesive tape so as to straddle the outer surface 42 of the plate 5 and the plate 41 and the rear surface 22 of the flange 2. An adhesive tape may be attached so as to cover the side edge surface 51 of the plate member 5.

尚、芯材は、Ｉ形鋼、溝形鋼等の形鋼を用いてもよい。
また、被覆材は、ソイルセメント７が硬化した後にＨ形鋼１の一方のフランジ２の表面４より剥がす際に、前記表面４と向かい合う面１２とは反対側の面１３に付着していたソイルセメント７１をソイルセメント柱８から剥がす強度を有したものであれば、シート状、フィルム状のものを用いてよい。 The core material may be a shape steel such as an I-shaped steel or a grooved steel.
Further, when the coating material is peeled from the surface 4 of one flange 2 of the H-section steel 1 after the soil cement 7 is hardened, the coating material is attached to the surface 13 opposite to the surface 12 facing the surface 4. Any sheet-like or film-like one may be used as long as it has the strength to peel the cement 71 from the soil cement pillar 8.

１ Ｈ形鋼（芯材）、４ 一方のフランジの表面、５ 板材（被覆材）、
６ 板材付きＨ形鋼（被覆材付き芯材）、７；７０；７１；７２ ソイルセメント、
８ ソイルセメント柱、９ 地盤、１１ 柱列、１２；１３ 面、１００ 山留め壁。 1 H-section steel (core material) 4 Surface of one flange 5 Plate material (coating material),
6 H-shaped steel with plate material (core material with covering material), 7; 70; 71; 72 soil cement,
8 soil cement pillars, 9 ground, 11 pillar rows, 12; 13 faces, 100 mountain retaining wall.

Claims (3)

地盤にソイルセメント柱の柱列を形成し、当該柱列の各ソイルセメント柱内に芯材を建て込み、柱列のソイルセメントが硬化した後に、柱列で囲まれた地盤を根切りするとともに、柱列の根切り側のソイルセメントを除去して芯材の表面を露出させた山留め壁を構築する方法において、
前記芯材の表面に当該表面を覆う被覆材が取付けられた被覆材付き芯材を未硬化のソイルセメント柱内に建て込んで、ソイルセメント柱内のソイルセメントが硬化した後に、ソイルセメント柱の柱列で囲まれた地盤を根切りするとともに、前記被覆材を剥がして前記芯材の表面を露出させたことを特徴とする山留め壁の構築方法。 Form a column of soil cement pillars on the ground, build a core in each soil cement pillar of the pillar row, and after the soil cement of the column row has hardened, root the ground surrounded by the column row In the method of constructing a retaining wall in which the surface of the core material is exposed by removing the soil cement on the root cutting side of the column row,
A core material with a covering material having a covering material attached to the surface of the core material is installed in an uncured soil cement column, and after the soil cement in the soil cement column has hardened, A method for constructing a retaining wall, wherein the ground surrounded by a column of columns is rooted and the surface of the core material is exposed by peeling off the covering material. 前記被覆材として、ソイルセメントが硬化した後に芯材の表面より剥がす際に、芯材の表面と向かい合う面とは反対側の面に付着していたソイルセメントをソイルセメント柱から剥がす強度を有したものを用いたことを特徴とする請求項１に記載の山留め壁の構築方法。   As the coating material, when the soil cement was hardened and peeled off from the surface of the core material, it had the strength to peel off the soil cement attached to the surface opposite to the surface facing the surface of the core material from the soil cement pillar. The method for constructing a retaining wall according to claim 1, wherein a thing is used. 前記被覆材として、板材を用いたことを特徴とする請求項２に記載の山留め壁の構築方法。   The method for constructing a retaining wall according to claim 2, wherein a plate material is used as the covering material.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117128A (en) * 1981-12-30 1983-07-12 Masato Ohori Construction of sheathing wall by master sheet pile
JPH05287745A (en) * 1992-04-13 1993-11-02 Fujita Corp Mounting method for wale in column aligning method
JPH0673727A (en) * 1992-08-27 1994-03-15 Toda Constr Co Ltd Method of constructing soil pile column row earth retaining wall and special h-shaped steel bar
JP2002061170A (en) * 2000-06-05 2002-02-28 Penta Ocean Constr Co Ltd Underground outer wall of structure and its construction method
JP2002212945A (en) * 2001-01-17 2002-07-31 Nippon Steel Corp H steel beam for earth-retaining wall core member and construction method for underground structure using h steel beam

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58117128A (en) * 1981-12-30 1983-07-12 Masato Ohori Construction of sheathing wall by master sheet pile
JPH05287745A (en) * 1992-04-13 1993-11-02 Fujita Corp Mounting method for wale in column aligning method
JPH0673727A (en) * 1992-08-27 1994-03-15 Toda Constr Co Ltd Method of constructing soil pile column row earth retaining wall and special h-shaped steel bar
JP2002061170A (en) * 2000-06-05 2002-02-28 Penta Ocean Constr Co Ltd Underground outer wall of structure and its construction method
JP2002212945A (en) * 2001-01-17 2002-07-31 Nippon Steel Corp H steel beam for earth-retaining wall core member and construction method for underground structure using h steel beam

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