JP3116253B2 - How to build a continuous underground wall - Google Patents
How to build a continuous underground wallInfo
- Publication number
- JP3116253B2 JP3116253B2 JP21578592A JP21578592A JP3116253B2 JP 3116253 B2 JP3116253 B2 JP 3116253B2 JP 21578592 A JP21578592 A JP 21578592A JP 21578592 A JP21578592 A JP 21578592A JP 3116253 B2 JP3116253 B2 JP 3116253B2
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- JP
- Japan
- Prior art keywords
- wall
- partition plate
- groove
- concrete
- constructing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は連続地中壁の構築方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a continuous underground wall.
【０００２】[0002]
【従来の技術】土留壁や構造物の基礎や、あるいは地下
構造物の一部を構成したりする連続地中壁は、一定の距
離を隔てて先行壁体を構築する第１工程と、先行地中壁
に後行地中壁を構築する第２工程を繰り返して所定の長
さまで延長している。これらの各壁体地は地中に掘削し
た溝内に鉄筋篭を建て込み、コンクリ−トを打設して構
築している。この種の連続地中壁の施工においては、強
度や止水性の観点から各壁体の一体性を図ることが肝要
である。この点に関し、従来は後行壁体用の溝掘削時に
おいてこの掘削溝に面した先行壁体の接続予定の端面を
ある程度切削し、先行壁体の端面に付着したスライムを
除去すると共に、打継面を目荒ししている。こうした先
行壁体端部の掘削作業は、溝掘削機を用いて後行壁体用
溝の掘削作業と同時に行っている。2. Description of the Related Art A continuous underground wall which forms a foundation of a retaining wall or a structure or a part of an underground structure includes a first step of constructing a preceding wall at a predetermined distance, The second step of constructing the following underground wall on the underground wall is repeated and extended to a predetermined length. Each of these wall structures is constructed by placing a steel cage in a trench excavated in the ground and casting concrete. In the construction of this type of continuous underground wall, it is important to ensure the integrity of each wall from the viewpoint of strength and waterproofness. In this regard, conventionally, when excavating a groove for a trailing wall, the end surface of the preceding wall facing the excavation groove to be connected is cut to some extent to remove slime adhered to the end surface of the preceding wall, and to strike. The joint surface is rough. The excavation work of the end portion of the preceding wall is performed simultaneously with the excavation work of the groove for the following wall using a trench excavator.
【０００３】[0003]
【発明が解決しようとする課題】上記の連続地中壁の施
工技術にあっては、次のような問題点がある。The above-mentioned construction technology of the continuous underground wall has the following problems.
【０００４】＜イ＞ 溝掘削機のドリルによる先行壁体
の端部の掘削を開始する際、掘削機が不安定であるため
とドリルの先行壁体への食い付きが悪いために、掘削位
置がずれ易い。掘削機による掘削位置がずれると、先行
壁体の端面の切削残しを生じたり、後行壁体用の溝を正
常な位置に掘削できない。<A> When starting the excavation of the end of the preceding wall by the drill of the groove excavator, the excavating position is determined because the excavator is unstable and the drill does not bite into the preceding wall. Is easily displaced. If the excavation position is shifted by the excavator, the end face of the preceding wall is left uncut, or the groove for the following wall cannot be excavated at a normal position.
【０００５】＜ロ＞ 上記イのような問題を解決する方
法として、先行壁体の構築時にスペ−サ−ボックスを付
設して対処する方法が特公平３−５７２４６号公報に開
示されている。この方法は壁面上部にスペ−サ−ボック
スを付設して先行壁体を構築した後にスペ−サ−ボック
スを抜き取り、先行壁体の両端上部にスペ−サ−ボック
ス分の空間を確保している。この方法にあっては、スペ
−サ−ボックスの撤去という追加工程を必要とする上
に、コンクリートの打設圧を受けスペ−サ−ボックスの
両面がコンクリ−トと地山に圧着してスペ−サ−ボック
スの抜き取りが非常に困難となる。<B> As a method for solving the above-mentioned problem (a), Japanese Patent Publication No. 3-57246 discloses a method in which a spacer box is attached when the preceding wall is constructed. In this method, a spacer box is attached to the upper part of the wall surface to construct a preceding wall, and then the spacer box is extracted, and a space for the spacer box is secured above both ends of the preceding wall. . In this method, an additional step of removing the spacer box is required. In addition, both sides of the spacer box are pressed against the concrete and the ground by receiving the concrete placing pressure. -It is very difficult to remove the server box.
【０００６】[0006]
【本発明の目的】本発明は、上記のような問題点を解決
するためになされたもので、その目的とするところは施
工精度の向上を実現できる連続地中壁の構築方法を提供
することにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method of constructing a continuous underground wall capable of improving the construction accuracy. It is in.
【０００７】[0007]
【課題を解決するための手段】即ち本発明は、一定の距
離を隔てて掘削した各先行溝内に鉄筋篭を建て込み、そ
の後コンクリートを打設して先行壁体を構築し、先行壁
体の間を掘削して先行壁体と一体の後行壁体を構築する
連続地中壁の構築方法において、鉄筋篭はその両端上部
であって、溝延長方向の地山端面から一定の距離を隔て
た位置に縦方向に取り付けた有孔構造の側部仕切板と、
この側部仕切板の下端から地山端面側に向けて分離可能
に突設した底部仕切板とを有し、各先行溝内に建て込ん
だ前記鉄筋篭の両端上部に、側部仕切板と底部仕切板と
溝壁とによりガイド空間を画成し、先行溝内にコンクリ
−トを打設してガイド空間内に劣悪コンクリートを残し
た状態で先行壁体を構築し、溝掘削機を側部仕切板に沿
って降下させて前記両先行壁体の間に後行溝を掘削し、
後行溝内にコンクリートを打設して先行壁体と一体の後
行壁を構築することを特徴とする、連続地中壁の構築方
法である。ここで、コンクリートの打設に先行してガイ
ド空間内に掘削機で容易に破砕できる仮置材を充填する
こともできる。さらに本発明は一定の距離を隔てて掘削
した各先行溝内に鉄筋篭を建て込み、その後コンクリー
トを打設して先行壁体を構築し、先行壁体の間を掘削し
て先行壁体と一体の後行壁体を構築する連続地中壁の構
築方法において、鉄筋篭はその両端上部であって、溝延
長方向の地山端面から一定の距離を隔てた位置に縦方向
に取り付けた水溶性の側部仕切板と、この側部仕切板の
下端から地山端面側に向けて分離可能に突設した水溶性
の底部仕切板とを有し、各先行溝内に建て込んだ前記鉄
筋篭の両端上部に、側部仕切板と底部仕切板と溝壁とに
よりガイド空間を画成し、先行溝内にコンクリ−トを打
設してガイド空間を保持した先行壁体を構築し、溝掘削
機を前記ガイド空間に沿って降下させて前記両先行壁体
の間に後行溝を掘削し、後行溝内にコンクリートを打設
して先行壁体と一体の後行壁を構築することを特徴とす
る、連続地中壁の構築方法である。That is, according to the present invention, a reinforced cage is erected in each preceding groove excavated at a fixed distance, and then concrete is cast to form a preceding wall. In the method of constructing a continuous underground wall that excavates between and constructs a trailing wall that is integral with the preceding wall, the reinforced cage is at a certain distance from the end face of the ground at the top of both ends thereof and in the groove extension direction. A side partition plate having a perforated structure vertically mounted at a separated position,
It has a bottom partition plate projecting separably from the lower end of this side partition plate toward the ground end face side, and at the upper end of both ends of the reinforcing bar built in each preceding groove, a side partition plate. A guide space is defined by the bottom partition plate and the groove wall, and concrete is cast in the preceding groove to leave poor concrete in the guide space.
In the state in which the leading wall is constructed, the ditch excavator is lowered along the side partition plate to excavate the trailing ditch between the two leading walls,
This is a method of constructing a continuous underground wall, comprising constructing a trailing wall integral with a preceding wall by casting concrete in a trailing ditch. Here, a temporary placing material that can be easily crushed by an excavator can be filled in the guide space before the concrete is poured. Further, in the present invention, a reinforcing bar is erected in each preceding groove excavated at a fixed distance, and then concrete is cast to construct a preceding wall, and excavation is performed between the preceding walls to form a leading wall. In the method of constructing a continuous underground wall for constructing an integral posterior wall, the reinforcing cage is vertically installed at a position at a certain distance from an end face of the ground in the direction in which the groove extends, at the upper end of both ends. Having a water-soluble bottom partition plate protrudably and separably protruded from the lower end of the side partition plate toward the ground end surface side, and the reinforcing bar built in each preceding groove. A guide space is defined by the side partition plate, the bottom partition plate, and the groove wall at the upper ends of both ends of the basket, and a concrete wall is cast in the preceding groove to construct a preceding wall body that holds the guide space. A ditch excavator is lowered along the guide space to excavate a trailing ditch between the two preceding wall bodies. Characterized by constructing the preceding wall and line wall after integral with Da設 concrete, a method for constructing a continuous underground wall.
【０００８】[0008]
【実施例１】以下、図面を参照しながら本発明の実施例
について説明する。Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
【０００９】＜イ＞先行壁体の構築 図１に示すように一定の距離を隔てて先行溝１ａ、１ｂ
を掘削する。つぎに各先行溝１ａ、１ｂ内に鉄筋篭２を
建て込む。この鉄筋篭２の両端面の上部には予め鉛直方
向に向けた側部仕切板２１と、側部仕切板２１の下部か
ら外側へ向けて下り勾配で傾斜する底部仕切板２２とを
一体に設置してく。側部仕切板２１は相対向する先行溝
１ａ、１ｂの地山面から一定距離を隔てた位置に取り付
けてある。側部仕切板２１と底部仕切板２２は先行溝１
ａ、１ｂの両端上部に溝掘削機のガイド空間Ｓを画成す
ることの他に、つぎの機能も併有する。<A> Construction of preceding wall As shown in FIG. 1, the leading grooves 1a and 1b are spaced apart from each other by a certain distance.
Drilling. Next, the rebar basket 2 is erected in each of the preceding grooves 1a and 1b. At the upper part of both end surfaces of the reinforcing bar 2, a side partition plate 21 which is directed in the vertical direction in advance and a bottom partition plate 22 which is inclined downward from the lower part of the side partition plate 21 toward the outside are integrally installed. Do it. The side partition plate 21 is attached at a position separated by a certain distance from the ground surface of the preceding grooves 1a and 1b facing each other. The side partition plate 21 and the bottom partition plate 22 are connected to the leading groove 1.
In addition to defining the guide space S of the trench excavator at the upper end of both ends of a and 1b, it also has the following functions.
【００１０】側部仕切板２１はコンクリートとの付着強
度をより大きくするための有孔板で、金網、エキスパン
ドメタル、有孔鉄板等を使用できる。また底部仕切板２
２は先行溝１ａ、１ｂ間に溝掘削機で溝を掘削する際に
破砕または分離する部材で、例えば樹脂製の板体や網体
等を使用できる。鉄筋篭２の建て込みを完了したら図３
に示すように、各先行溝１ａ、１ｂ内にコンクリートを
トレミー管で打設して先行壁体４ａ，４ｂを構築する。
水中コンクリートは一般にその表層部に土砂の混入した
粗悪コンクリート層を形成しながら上昇するため、各先
行壁体４ａ，４ｂ上部は劣悪のコンクリートで構成さ
れ、同様に液位が側部仕切板２１の位置に達し、側部仕
切板２１の開孔を通じてガイド空間Ｓ内に浸透したコン
クリートも破壊し易い劣悪なものとなる。The side partition plate 21 is a perforated plate for further increasing the bonding strength to concrete, and may be a wire mesh, expanded metal, perforated iron plate, or the like. Also, bottom partition plate 2
Reference numeral 2 denotes a member which is crushed or separated when a groove is excavated between the preceding grooves 1a and 1b by a groove excavator, and for example, a resin plate or net can be used. When the rebar basket 2 has been built, Fig. 3
As shown in (1), concrete is poured into each of the preceding grooves 1a and 1b by a tremy tube to construct the preceding walls 4a and 4b.
Since the underwater concrete generally rises while forming a poor concrete layer mixed with earth and sand on the surface layer, the upper portions of the preceding walls 4a and 4b are made of poor concrete, and the liquid level of the side partition plate 21 is similarly reduced. The concrete that has reached the position and has penetrated into the guide space S through the opening of the side partition plate 21 is also inferior and easily broken.
【００１１】＜ロ＞後行壁体の構築 以下の要領で先行壁体４ａ，４ｂ間に後行壁体４ｃを構
築する。図４に示すように溝掘削機５で以て先行壁体４
ａ，４ｂ間に後行溝１ｃを掘削する。溝掘削機５は、各
先行壁体４ａ，４ｂの端部に位置する側部仕切板２１、
２１の対向距離とほぼ等しい幅で後行溝１ｃの掘削を開
始する。先行壁体４ａ，４ｂの端部上層のコンクリート
は劣悪であるから、溝掘削機５のドリルによる劣悪コン
クリートへのくらい付きが良好となる。溝掘削機５はド
リルを先行壁体４ａ、４ｂの側部仕切板２１及び地山に
ガイドされながら後行溝１ｃの掘削作業を継続する。底
部仕切板２２は後行溝１ｃの掘削作業中に溝掘削機５の
ドリルで破砕され、側部仕切板２１は先行壁体４ａ、４
ｂに付着したまま残置するか、或いは底部仕切板２２と
同様に破砕する。各先行壁体４ａ，４ｂの両端に一定幅
で食い込ませて後行溝１ｃを掘削したら、この後行溝１
ｃ内に図示しない鉄筋篭を建て込み、コンクリートを打
設して後行壁体４ｃを構築する。尚、後行溝１ｃに建て
込む鉄筋篭は側部仕切板２１や底部仕切板２２の取り付
けてないタイプのものである。両壁体４ａ，４ｃ，４ｂ
間に側部仕切板２１が介在する場合、各側部仕切板２１
は側部仕切板２１の開孔を通じて両壁体４ａ，４ｃ、４
ｂ，４ｃが強固に付着し、また側部仕切板２１が介在す
る部位が両壁体４ａ〜４ｃの上部の僅かな範囲であるか
ら、両壁体４ａ〜４ｃの打継目の強度や止水性の点で何
等悪影響がない。 以上の工程を繰り返して、所定の長
さまで連続地中壁を構築する。<B> Construction of a trailing wall body A trailing wall body 4c is constructed between the preceding wall bodies 4a and 4b in the following manner. As shown in FIG.
A trailing groove 1c is excavated between a and 4b. The groove excavator 5 includes a side partition plate 21 located at an end of each preceding wall body 4a, 4b,
The excavation of the trailing groove 1c is started with a width substantially equal to the facing distance 21. Since the concrete in the upper layer of the end portions of the preceding wall bodies 4a and 4b is inferior, the adhesion to the inferior concrete by the drill of the trench excavator 5 becomes good. The groove excavator 5 continues the excavation work of the trailing groove 1c while the drill is guided by the side partition plates 21 of the preceding wall bodies 4a and 4b and the ground. The bottom partition plate 22 is crushed by the drill of the groove excavator 5 during the excavation work of the trailing groove 1c, and the side partition plates 21 are separated from the preceding wall members 4a, 4d.
b, or is crushed in the same manner as the bottom partition plate 22. When the trailing groove 1c is excavated by cutting into both ends of each preceding wall body 4a, 4b with a constant width, the trailing groove 1c is excavated.
A reinforced cage (not shown) is erected in c, and concrete is cast to construct a trailing wall 4c. The rebar basket to be built in the trailing groove 1c is of a type to which the side partition plate 21 and the bottom partition plate 22 are not attached. Both walls 4a, 4c, 4b
When the side partition plates 21 are interposed therebetween, each side partition plate 21
Are the two walls 4a, 4c, 4 through the opening of the side partition plate 21.
b and 4c are firmly adhered and the portion where the side partition plate 21 intervenes is a small area above the both walls 4a to 4c. There is no adverse effect on the point. By repeating the above steps, a continuous underground wall is constructed to a predetermined length.
【００１２】[0012]
【実施例２】図６に示すように先行壁体を構築するに際
し、側部仕切板２１と底部仕切板２２と地山で包囲され
るガイド空間部Ｓ内に砂利等の仮置材５を充填した後に
コンクリートを打設しても良い。本実施例によれば先行
壁体構築時においては仮置材５がガイド空間部Ｓ内にコ
ンクリートが浸透するのを阻止でき、また後行溝の掘削
初期においては仮置材５が容易に崩れて溝掘削装置の貫
入抵抗を小さくできる利点がある。[Embodiment 2] As shown in FIG. 6, when constructing the preceding wall, the temporary partitioning material 5 such as gravel is placed in the guide space S surrounded by the side partition plate 21, the bottom partition plate 22, and the ground. After filling, concrete may be cast. According to this embodiment, when the preceding wall is constructed, the temporary placing material 5 can be prevented from infiltrating the concrete into the guide space portion S, and the temporary placing material 5 easily collapses at the initial stage of excavation of the following groove. This has the advantage that the penetration resistance of the trench excavator can be reduced.
【００１３】[0013]
【実施例３】図７及び図８に水溶性の素材で側部仕切板
１２１と底部仕切板１２２を形成した実施例を示す。
尚、本実施例では既述の実施例と同一の部材は同一の符
号を付して説明を省略する。Embodiment 3 FIGS. 7 and 8 show an embodiment in which the side partition plate 121 and the bottom partition plate 122 are formed of a water-soluble material.
In this embodiment, the same members as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted.
【００１４】＜イ＞構成 図７に示すように側部仕切板１２１と底部仕切板１２２
は、基本的に実施例１で説明した側部仕切板２１及び底
部仕切板２２と同様にガイド空間Ｓを画成するための部
材であるが、側部仕切板１２１と底部仕切板１２２を板
状部材で構成する点と、両仕切板１２１，１２２が水溶
性合成樹脂等の水溶性の素材で形成する点が先の実施例
１と相違する。側部仕切板１２１及び底部仕切板１２２
は、吸水により瞬時に溶解するのではなく、少なくとも
先行壁体４ａ，４ｂの構築時においてガイド空間部Ｓを
画成するまでは溶解せず、その後（後行溝の掘削直前ま
で）に溶解するように溶解開始時間を施工サイクルや施
工条件等を考慮して任意に設定する。<A> Configuration As shown in FIG. 7, a side partition plate 121 and a bottom partition plate 122 are provided.
Is a member for defining the guide space S in the same manner as the side partition plate 21 and the bottom partition plate 22 described in the first embodiment, but the side partition plate 121 and the bottom partition plate 122 The second embodiment differs from the first embodiment in that the first and second partition plates 121 and 122 are formed of a water-soluble material such as a water-soluble synthetic resin. Side partition plate 121 and bottom partition plate 122
Does not dissolve instantaneously due to water absorption, but does not dissolve at least until the guide space S is defined at the time of construction of the preceding wall bodies 4a, 4b, but dissolves thereafter (immediately before excavation of the following ditch). As described above, the melting start time is arbitrarily set in consideration of the construction cycle, construction conditions, and the like.
【００１５】＜ロ＞作用 先行溝１ａ、１ｂを掘削後、各先行溝１ａ、１ｂ内に仕
切板１２１，１２２付きの鉄筋篭２を建て込み、コンク
リ−トを打設して先行壁体４ａ，４ｂを構築する。コン
クリートの打設により側部仕切板１２１及び底部仕切板
１２２と地山間にコンクリートの充填されていないガイ
ド空間Ｓを画成する。ガイド空間Ｓを画成した側部仕切
板１２１及び底部仕切板１２２は徐々に溶解が進行し、
後行溝１ｃを掘削する前までに消滅する。したがって、
側部仕切板１２１及び底部仕切板１２２が溶解していれ
ばその両端にガイド空間Ｓを持つ地盤を掘削することに
なり、また万一側部仕切板１２１及び底部仕切板１２２
が完全に溶解していない場合でも、溝掘削機のドリル５
１がガイド空間部Ｓに案内されて側部仕切板１２１や底
部仕切板１２２を破壊しながら掘削することになる。い
ずれにせよ側部仕切板１２１及び底部仕切板１２２が水
溶性の材質であるため、側部仕切板１２１及び底部仕切
板１２２が溝掘削機の掘削抵抗部材にならない。先行壁
体４ａ，４ｂの両端部を一定幅で削り取りながら後行溝
１ｃを掘削したら、この後行溝１ｃ内に鉄筋篭を建て込
みコンクリートを打設して後行壁体４ｃを構築する。先
行壁体４ａ、４ｂと後行壁体４ｃとの打ち継ぎ目に、水
溶性の側部仕切板１２１及び底部仕切板１２２が混在し
ない。尚、ガイド空間Ｓ内に図６に示す仮置材５を充填
して施工してもよい。<B> Operation After excavating the leading grooves 1a and 1b, the reinforcing cage 2 with the partition plates 121 and 122 is erected in each of the leading grooves 1a and 1b, and a concrete is cast into the leading wall body 4a. , 4b. A concrete-filled guide space S between the side partition plate 121 and the bottom partition plate 122 and the ground is defined by casting concrete. The side partition plate 121 and the bottom partition plate 122 that define the guide space S gradually dissolve,
It disappears before excavating the trailing groove 1c. Therefore,
If the side partition plate 121 and the bottom partition plate 122 are melted, the ground having the guide space S at both ends will be excavated. In addition, the side partition plate 121 and the bottom partition plate 122
Drills for trench excavators 5
1 is guided by the guide space S and excavates while breaking the side partition plate 121 and the bottom partition plate 122. In any case, since the side partition plate 121 and the bottom partition plate 122 are made of a water-soluble material, the side partition plate 121 and the bottom partition plate 122 do not become the excavation resistance members of the trench excavator. When the trailing groove 1c is excavated while shaving both ends of the leading wall bodies 4a, 4b with a constant width, a reinforcing cage is erected in the trailing groove 1c and concrete is cast to construct the trailing wall body 4c. The water-soluble side partition plate 121 and the bottom partition plate 122 do not coexist at the joint between the preceding wall members 4a and 4b and the following wall member 4c. Note that the temporary space member 5 shown in FIG.
【００１６】[0016]
【本発明の効果】本発明は次の効果を得ることができ
る。According to the present invention, the following effects can be obtained.
【００１７】＜イ＞ 先行壁体の両端上部にガイド空間
を画成する側部仕切板と底部仕切板とを位置させること
で、このガイド空間が後行溝掘削開始時に溝掘削機のド
リルを正確な位置に案内する。そのため、掘削機の位置
ずれを解消でき、安定した高精度の掘削作業を行うこと
ができる。<A> By locating the side partition and the bottom partition which define the guide space above both ends of the preceding wall, the guide space allows the drill of the ditch excavator to be used at the start of the following ditch excavation. Guide to the exact location. Therefore, the displacement of the excavator can be eliminated, and a stable and highly accurate excavation operation can be performed.
【００１８】＜ロ＞ 本発明では側部仕切板を両壁体の
打継目に残置するため、側部仕切板の撤去作業が不要と
なる。<B> In the present invention, since the side partition plates are left at the joint of the two walls, the work of removing the side partition plates becomes unnecessary.
【００１９】＜ハ＞ コンクリートの打設に先行して、
ガイド空間内に砂利等の仮置材を充填しておくと、仮置
材が側部仕切板と底部仕切板に作用するコンクリート打
設圧の抵抗部材として機能するだけでなく、後行溝の掘
削時に崩壊して掘削作業の障害になることがない。<C> Prior to placing concrete,
Filling the guide space with temporary placement material such as gravel will not only function as a resistance member for concrete placing pressure acting on the side partition plate and bottom partition plate, but will also prevent It does not collapse during excavation and does not interfere with excavation work.
【００２０】＜ニ＞ 側部仕切板及び底部仕切板を水溶
性の素材で形成し、少なくとも後行壁体のコンクリ−ト
打設前に溶解するように設定してある場合は、先行壁体
の両端上部にガイド空間を画成できるだけでなく、先行
壁体と後行壁体との打継目に異物が混在するのを回避で
きる。<D> If the side partition plate and the bottom partition plate are made of a water-soluble material and are set so as to be dissolved at least before concrete casting of the following wall, the preceding wall is used. Not only can define a guide space above both ends but also prevent foreign matter from being mixed at the joint between the preceding wall and the following wall.
【図１】 本発明の施工法の説明図で先行溝の掘削時の
説明図FIG. 1 is an explanatory view of a construction method according to the present invention and is an explanatory view at the time of excavation of a leading groove.
【図２】 先行溝内に建て込んだ鉄筋篭上部の斜視図FIG. 2 is a perspective view of the upper part of a reinforcing cage built in the preceding groove.
【図３】 先行壁体の平面図FIG. 3 is a plan view of a preceding wall body.
【図４】 後行溝の掘削時の説明図FIG. 4 is an explanatory view at the time of excavation of a trailing ditch.
【図５】 後行壁体の施工時の説明図FIG. 5 is an explanatory view at the time of construction of a trailing wall body.
【図６】 仮置材を使用した実施例２の説明図FIG. 6 is an explanatory view of Example 2 using a temporary placing material.
【図７】 側部仕切板及び底部仕切板を水溶性の素材で
形成した実施例３の説明図FIG. 7 is an explanatory view of Embodiment 3 in which the side partition and the bottom partition are formed of a water-soluble material.
【図８】 後行溝の掘削時の部分断面図FIG. 8 is a partial cross-sectional view when excavating a trailing ditch.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小野澤 鍾 東京都新宿区西新宿一丁目25番１号 大 成建設株式会社内 (56)参考文献 特開 平１−165815（ＪＰ，Ａ) 特開 昭63−125722（ＪＰ，Ａ) 特開 平３−28414（ＪＰ，Ａ) 特開 昭63−176522（ＪＰ，Ａ) 特開 平３−5519（ＪＰ，Ａ) 特開 平３−17312（ＪＰ，Ａ) 特開 平２−136421（ＪＰ，Ａ) 特開 昭63−304819（ＪＰ，Ａ) 特公 昭56−23491（ＪＰ，Ｂ２) 特公 昭48−10562（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 5/18 - 5/20 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadashi Onozawa 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (56) References JP-A-1-165815 (JP, A) JP JP-A-63-125722 (JP, A) JP-A-3-28414 (JP, A) JP-A-63-176522 (JP, A) JP-A-3-5519 (JP, A) JP-A-3-17312 (JP) JP-A-2-136421 (JP, A) JP-A-63-304819 (JP, A) JP-B-56-23491 (JP, B2) JP-B-48-10562 (JP, B1) (58) Field surveyed (Int.Cl. 7 , DB name) E02D 5/18-5/20
Claims (3)
鉄筋篭を建て込み、その後コンクリートを打設して先行
壁体を構築し、先行壁体の間を掘削して先行壁体と一体
の後行壁体を構築する連続地中壁の構築方法において、 鉄筋篭はその両端上部であって、溝延長方向の地山端面
から一定の距離を隔てた位置に縦方向に取り付けた有孔
構造の側部仕切板と、この側部仕切板の下端から地山端
面側に向けて分離可能に突設した底部仕切板とを有し、 各先行溝内に建て込んだ前記鉄筋篭の両端上部に、側部
仕切板と底部仕切板と溝壁とによりガイド空間を画成
し、 先行溝内にコンクリ−トを打設してガイド空間内に劣悪
コンクリートを残した状態で先行壁体を構築し、 溝掘削機を側部仕切板に沿って降下させて前記両先行壁
体の間に後行溝を掘削し、 後行溝内にコンクリートを打設して先行壁体と一体の後
行壁を構築することを特徴とする、 連続地中壁の構築方法。1. Reinforcing cages are erected in each preceding groove excavated at a predetermined distance, and then concrete is cast to form a preceding wall. In the method of constructing a continuous underground wall that builds a trailing wall body integral with the reinforced concrete cage, the reinforcing bar was vertically mounted at a position at a certain distance from the end face of the ground in the groove extension direction at the upper end of both ends A side partition plate having a perforated structure, and a bottom partition plate projecting from a lower end of the side partition plate toward a ground end face side so as to be separable, and the reinforcing bar cage built in each preceding groove. A guide space is defined by the side partition plate, the bottom partition plate, and the groove wall at the upper end of both ends, and concrete is poured into the preceding groove to leave the inferior concrete in the guide space. The body is constructed, and the ditch excavator is lowered along the side partition to excavate the following ditch between the two preceding walls. A method of constructing a continuous underground wall, characterized by shaving and placing concrete in a trailing ditch to construct a trailing wall integral with a preceding wall body.
鉄筋篭を建て込み、その後コンクリートを打設して先行
壁体を構築し、先行壁体の間を掘削して先行壁体と一体
の後行壁体を構築する連続地中壁の構築方法において、 鉄筋篭はその両端上部であって、溝延長方向の地山端面
から一定の距離を隔てた位置に縦方向に取り付けた水溶
性の側部仕切板と、この側部仕切板の下端から地山端面
側に向けて分離可能に突設した水溶性の底部仕切板とを
有し、 各先行溝内に建て込んだ前記鉄筋篭の両端上部に、側部
仕切板と底部仕切板と溝壁とによりガイド空間を画成
し、 先行溝内にコンクリ−トを打設してガイド空間を保持し
た先行壁体を構築し、溝掘削機を前記ガイド空間に沿っ
て降下させて前記両先行壁体の間に後行溝を掘削し、 後行溝内にコンクリートを打設して先行壁体と一体の後
行壁を構築することを特徴とする、 連続地中壁の構築方法。2. Reinforcing cages are erected in each of the leading grooves excavated at a predetermined distance, and then concrete is poured into the leading grooves to construct a leading wall. In the method of constructing a continuous underground wall that builds a trailing wall body integral with the reinforced concrete cage, the reinforcing bar was vertically mounted at a position at a certain distance from the end face of the ground in the groove extension direction at the upper end of both ends A water-soluble side partition plate, having a water-soluble bottom partition plate projecting separably from the lower end of the side partition plate toward the ground end surface side, and having been built in each preceding groove. A guide space is defined by a side partition plate, a bottom partition plate, and a groove wall at the upper ends of both ends of the reinforced cage, and a concrete is cast into the preceding groove to construct a preceding wall body that holds the guide space. Lowering the ditch excavator along the guide space to excavate the following ditch between the two preceding wall bodies, A method of constructing a continuous underground wall, comprising constructing a trailing wall integral with a preceding wall body by casting concrete in the wall.
鉄筋篭を建て込み、その後コンクリートを打設して先行
壁体を構築し、先行壁体の間を掘削して先行壁体と一体
の後行壁体を構築する連続地中壁の構築方法において、 鉄筋篭はその両端上部であって、溝延長方向の地山端面
から一定の距離を隔てた位置に縦方向に取り付けた有孔
構造の側部仕切板と、この側部仕切板の下端から地山端
面側に向けて分離可能に突設した底部仕切板とを有し、 各先行溝内に建て込んだ前記鉄筋篭の両端上部に、側部
仕切板と底部仕切板と溝壁とによりガイド空間を画成
し、 前記 ガイド空間内に掘削機で容易に破砕できる仮置材を
充填し、 先行溝内にコンクリ−トを打設して先行壁体を構築し、 溝掘削機を側部仕切板に沿って降下させて前記両先行壁
体の間に後行溝を掘削し、 後行溝内にコンクリートを打設して先行壁体と一体の後
行壁を構築することを特徴とする、 連続地中壁の構築方法。3. In each preceding groove excavated at a fixed distance,
Reinforced baskets are erected, and then concrete is poured in.
Construct a wall, excavate between the preceding walls, and integrate with the preceding wall
In the method of constructing a continuous underground wall for constructing a trailing wall body, the reinforcing bar is located at the upper end of both ends, and the end face of the ground in the groove extending direction
Perforated vertically mounted at a certain distance from
The side divider of the structure and the ground edge from the lower end of this side divider
And a bottom partition plate projecting separably toward the surface side, and a side portion at the upper end of both ends of the reinforcing bar built in each preceding groove.
Guide space is defined by the partition plate, bottom partition plate and groove wall
And, the guide filled with temporary置材readily crushed by the excavator in the space, concrete the preceding groove - by Da設the door builds a leading wall, along the excavator to lateral partition plate And descend to the two preceding walls
Excavation of the trailing groove between the bodies, placing concrete in the trailing groove, and after integrating with the preceding wall
A method for constructing a continuous underground wall, comprising constructing a line wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21578592A JP3116253B2 (en) | 1992-07-22 | 1992-07-22 | How to build a continuous underground wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21578592A JP3116253B2 (en) | 1992-07-22 | 1992-07-22 | How to build a continuous underground wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0641952A JPH0641952A (en) | 1994-02-15 |
| JP3116253B2 true JP3116253B2 (en) | 2000-12-11 |
Family
ID=16678195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21578592A Expired - Fee Related JP3116253B2 (en) | 1992-07-22 | 1992-07-22 | How to build a continuous underground wall |
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| Country | Link |
|---|---|
| JP (1) | JP3116253B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100722665B1 (en) * | 2007-03-15 | 2007-05-28 | 삼보지질 주식회사 | Steel guide wall for construction of underground diaphragm wall and construction method of underground diaphragm wall using the same |
| EP2270145B1 (en) | 2008-04-15 | 2013-01-16 | Wako Pure Chemical Industries, Ltd. | Novel protein capable of binding to hyaluronic acid, and method for measurement of hyaluronic acid using the same |
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1992
- 1992-07-22 JP JP21578592A patent/JP3116253B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0641952A (en) | 1994-02-15 |
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