JP6804034B2 - How to build a retaining wall structure - Google Patents

How to build a retaining wall structure Download PDF

Info

Publication number
JP6804034B2
JP6804034B2 JP2016139754A JP2016139754A JP6804034B2 JP 6804034 B2 JP6804034 B2 JP 6804034B2 JP 2016139754 A JP2016139754 A JP 2016139754A JP 2016139754 A JP2016139754 A JP 2016139754A JP 6804034 B2 JP6804034 B2 JP 6804034B2
Authority
JP
Japan
Prior art keywords
steel plate
ground
pile
locking
retaining wall
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.)
Active
Application number
JP2016139754A
Other languages
Japanese (ja)
Other versions
JP2018009393A (en
Inventor
秀俊 大里
秀俊 大里
伸吾 田口
伸吾 田口
久典 岡▲崎▼
久典 岡▲崎▼
洋一 嶋田
洋一 嶋田
太一 照井
太一 照井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Obayashi Corp
Original Assignee
Obayashi Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Obayashi Corp filed Critical Obayashi Corp
Priority to JP2016139754A priority Critical patent/JP6804034B2/en
Publication of JP2018009393A publication Critical patent/JP2018009393A/en
Application granted granted Critical
Publication of JP6804034B2 publication Critical patent/JP6804034B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Bulkheads Adapted To Foundation Construction (AREA)

Description

本発明は、従来の親杭横矢板土留め壁を用いた工法が採用される状況に主として適用される土留め壁構造の構築方法に関する。 The present invention relates to a method for constructing an earth retaining wall structure, which is mainly applied in a situation where a conventional method using a main pile horizontal sheet pile earth retaining wall is adopted.

土留め工は、地盤掘削時の地山崩壊を防止することを目的としたものであって、建築構造物の基礎や開削方式でのトンネルをはじめ、地表面近傍に構造物を構築する場合には必要不可欠な工事となる。 The earth retaining work is intended to prevent the collapse of the ground during excavation of the ground, and is used when constructing a structure near the ground surface, such as the foundation of a building structure or a tunnel by an excavation method. Is an indispensable construction.

土留め工は、支保形式の違いによって、自立式、切梁式、グラウンドアンカー式、控え式タイロッド式などに分類されるとともに、土留め壁の違いによって、親杭横矢板土留め壁、鋼矢板、鋼管矢板、連続地中壁などに分類され、掘削の規模、地盤性状、地下水の水位等に応じて適宜選択される。 Retainers are classified into self-supporting type, girder type, ground anchor type, tie rod type, etc. according to the difference in support type, and the main pile horizontal sheet pile earth retaining wall, steel sheet pile depending on the difference in earth retaining wall. , Steel pipe sheet piles, continuous underground walls, etc., and are appropriately selected according to the scale of excavation, ground properties, groundwater level, etc.

これらのうち、親杭横矢板土留め壁を用いた土留め工(以下、親杭横矢板工法)は、H形鋼等の親杭を地盤に打ち込み、あるいは立て込んだ後、掘削工事の進捗に合わせて、隣り合う親杭の間に木製の横矢板を順次嵌め込んでいく工法であって、経済性に優れることから、地盤が良質で比較的小規模な工事では、旧来から広く採用されている。 Of these, the earth retaining work using the main pile horizontal sheet pile earth retaining wall (hereinafter referred to as the main pile horizontal sheet pile method) is to proceed with the excavation work after driving or erecting the main pile such as H-shaped steel into the ground. At the same time, it is a construction method in which wooden horizontal sheet piles are sequentially fitted between adjacent parent piles, and because it is excellent in economy, it has been widely adopted from the past in relatively small-scale construction with good ground. There is.

特公平7−038377号公報Special Fair 7-0383777

しかしながら、従来の親杭横矢板工法においては、横矢板をH形鋼に嵌め込むにあたり、一般的には、掘削によって側方に露出した地山を覆うようにして、先行配置された横矢板の下方にあらたな横矢板を手作業で一枚一枚嵌め込まねばならず、横矢板の設置に多大な手間と時間を要するほか、根切り底では、バックホウ等の掘削重機と作業員とが混在するため、安全性に対しても多大な配慮を払わねばならないという問題を生じていた。 However, in the conventional parent pile horizontal sheet pile method, when the horizontal sheet pile is fitted into the H-shaped steel, in general, the horizontal sheet pile is arranged in advance so as to cover the ground exposed to the side by excavation. New horizontal sheet piles must be manually fitted one by one at the bottom, which requires a great deal of labor and time to install the horizontal sheet piles, and at the bottom of the root cutting, heavy excavation machines such as backhoes and workers coexist. Therefore, there is a problem that a great deal of consideration must be given to safety.

本発明は、上述した事情を考慮してなされたもので、開削工事における土留め工の作業効率の改善と安全性の向上とを図ることが可能な土留め壁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 consideration of the above-mentioned circumstances, and provides a method for constructing a retaining wall structure capable of improving the work efficiency and safety of the retaining work in the excavation work. With the goal.

上記目的を達成するため、本発明に係る土留め壁構造の構築方法は請求項1に記載したように、地盤内における開削予定領域とその周囲に拡がる周辺地盤との側方境界面のうち、鉛直面に対して所定の傾斜角度を有する側方境界面に沿って親杭を地表面から地盤内に挿入し、
平板状をなす鋼板を、その周縁であって互いに反対側となる2つの縁部が、前記親杭のうち、互いに隣り合う2本の親杭にそれぞれ設けられた係止部であってそれらの係止面上を前記親杭の材軸方向に沿って摺動し又は前記係止部による前記親杭の材軸直交方向への係止作用が維持される範囲内で前記係止面からの離間距離を保ちつつ前記親杭の材軸方向に沿って移動するように、地表面から前記地盤内に挿入する土留め壁構造の構築方法であって、
前記親杭の頂部近傍が地上に露出した状態で前記親杭の挿入工程を中断し、該親杭の地上露出部位に前記鋼板の挿入を案内させる形で該鋼板の挿入工程を実施し、該鋼板の挿入工程完了後、前記親杭の挿入工程を再開するものである。
In order to achieve the above object, the method of constructing the earth retaining wall structure according to the present invention is described in claim 1, among the lateral boundary surfaces between the planned excavation area in the ground and the surrounding ground extending around the area. A parent pile is inserted from the ground surface into the ground along a lateral boundary surface having a predetermined inclination angle with respect to the vertical plane.
The two edges of the flat plate-shaped steel plate, which are peripheral edges and are opposite to each other, are locking portions provided on the two parent piles adjacent to each other among the parent piles. From the locking surface within a range in which the locking surface slides along the material axis direction of the parent pile or the locking action of the locking portion in the direction perpendicular to the material axis of the parent pile is maintained. It is a method of constructing a retaining wall structure that is inserted into the ground from the ground surface so as to move along the material axis direction of the main pile while maintaining a separation distance.
The insertion step of the master pile is interrupted in a state where the vicinity of the top of the master pile is exposed to the ground, and the insertion step of the steel plate is carried out so as to guide the insertion of the steel plate to the exposed portion of the master pile above the ground. After the steel sheet insertion process is completed, the parent pile insertion process is restarted.

また、本発明に係る土留め壁構造の構築方法は、前記親杭を形鋼で構成するとともに、該形鋼を構成するフランジのうち、前記開削予定領域に近い掘削側フランジを前記係止部、該掘削側フランジの背面を前記係止面としたものである。 Further, in the method for constructing the earth retaining wall structure according to the present invention, the main pile is made of shaped steel, and among the flanges constituting the shaped steel, the excavation side flange close to the planned excavation area is locked. The back surface of the excavation side flange is used as the locking surface.

また、本発明に係る土留め壁構造の構築方法は、前記鋼板の挿入工程に先立ち、前記摺動を案内する第1の案内手段を前記親杭の地上露出部位に設置する工程を含み、該第1の案内手段を、前記係止面に対向しかつ該係止面との間に前記鋼板の厚みに相当する間隙を形成する案内面が設けられたガイド部材で構成するとともに、前記案内面と前記係止面との間に前記鋼板が挿通された状態で前記鋼板の挿入工程を実施するものである。 Further, the method for constructing the earth retaining wall structure according to the present invention includes a step of installing a first guiding means for guiding the sliding on the above-ground exposed portion of the parent pile prior to the step of inserting the steel plate. The first guide means is composed of a guide member provided with a guide surface that faces the locking surface and forms a gap corresponding to the thickness of the steel plate between the locking surface and the guiding surface. The step of inserting the steel plate is carried out in a state where the steel plate is inserted between the steel plate and the locking surface.

また、本発明に係る土留め壁構造の構築方法は、前記鋼板の挿入工程に先立ち、前記摺動を案内する第2の案内手段を前記鋼板の下縁近傍に設置する工程を含み、該第2の案内手段を、前記係止部に係合する係合爪で構成するとともに、該係合爪が前記係止部に係合した状態で前記鋼板の挿入工程を実施するものである。 Further, the method for constructing the earth retaining wall structure according to the present invention includes a step of installing a second guiding means for guiding the sliding in the vicinity of the lower edge of the steel plate prior to the step of inserting the steel plate. The guide means 2 is composed of an engaging claw that engages with the locking portion, and the steel plate insertion step is performed with the engaging claw engaged with the locking portion.

[土留め壁構造(参考)
参考発明に係る土留め壁構造においては、親杭と、平板状をなす鋼板とを地盤内に配置してあるが、該鋼板を地盤内に配置するにあたっては、その周縁であって互いに反対側となる2つの縁部が、互いに隣り合う2本の親杭にそれぞれ設けられた係止部によって該各親杭の材軸直交方向にそれぞれ係止されるように配置してある。
[Retaining wall structure (reference) ]
In the earth retaining wall structure according to the reference invention , the main pile and the flat steel plate are arranged in the ground, but when the steel plate is arranged in the ground, it is the peripheral edge thereof and opposite to each other. The two edge portions are arranged so as to be locked in the direction orthogonal to the material axis of each master pile by the locking portions provided on the two master piles adjacent to each other.

このようにすると、開削予定領域に拡がる地山を掘削した後は、鋼板の背面に作用する主動土圧がその縁部を介して親杭に伝達されるとともに、該親杭の根入れ部分に作用する受動土圧が反力となって上述の主働土圧が確実に支持されることとなる。また、鋼板は従来使用していた木製の横矢板よりも強度が非常に高いことから、従来の親杭横矢板工法と同等以上の土留め機能が発揮される。 In this way, after excavating the ground that extends to the planned excavation area, the active earth pressure acting on the back surface of the steel plate is transmitted to the parent pile via the edge thereof, and at the rooting portion of the parent pile. The acting passive earth pressure becomes a reaction force, and the above-mentioned active earth pressure is surely supported. In addition, since the steel plate is much stronger than the wooden horizontal sheet pile that has been used conventionally, it exhibits the same or better earth retaining function as the conventional parent pile horizontal sheet pile method.

加えて、鋼材が本来的に有する高い剛性と強度により、機械的圧力で鋼板を地表面から挿入配置する、とりわけ地表面近傍から根切り底近傍に至る長さで挿入配置することができるため、短冊状に分割された木製横矢板を一枚一枚手作業で親杭に嵌め込んでいた従来とは異なり、矢板を設置する際の作業性が格段に向上するほか、掘削前に矢板を設置することが可能であるため、従来のように掘削のための重機と矢板設置のための作業員とが根切り底で混在する事態は起こり得ず、かくして安全性についても大幅に向上する。 In addition, due to the inherently high rigidity and strength of the steel material, the steel sheet can be inserted and placed from the ground surface by mechanical pressure, and in particular, it can be inserted and placed with a length from the vicinity of the ground surface to the vicinity of the root cutting bottom. Unlike the conventional method in which the wooden horizontal sheet piles divided into strips are manually fitted into the main pile one by one, the workability when installing the sheet piles is significantly improved, and the sheet piles are installed before excavation. Since it is possible to do so, it is unlikely that heavy machinery for excavation and workers for sheet pile installation will coexist at the root cutting bottom as in the past, and thus safety will be greatly improved.

また、上述したように地表面近傍から根切り底近傍に至る長さで鋼板を構成することができるため、埋め戻し後にこれを引き抜くことで鋼板を容易に撤去することが可能となり、材料自体の転用容易性とも相俟って、土木資材の有効利用も可能となる。 Further, as described above, since the steel sheet can be formed with a length from the vicinity of the ground surface to the vicinity of the root cutting bottom, the steel sheet can be easily removed by pulling it out after backfilling, and the material itself can be removed. Combined with the ease of diversion, it also enables effective use of civil engineering materials.

さらに、参考発明に係る土留め壁構造においては、開削予定領域の側方境界面のうち、鉛直面に対して所定の傾斜角度を有する側方境界面に沿って親杭を地盤内に配置するとともに、その親杭に沿って上述したように鋼板を地盤内に配置してある。 Further, in the earth retaining wall structure according to the reference invention, the parent pile is arranged in the ground along the lateral boundary surface having a predetermined inclination angle with respect to the vertical surface among the lateral boundary surfaces of the planned excavation area. At the same time, steel plates are arranged in the ground along the parent pile as described above.

このようすると、鋼板の背面に作用する主動土圧が軽減されるので、土質性状に合わせて傾斜角度を適宜設定することにより、切梁、腹起こしといった支保工を省略することが可能となり、かくして上述した矢板設置時の作業性改善との協働作用によって、土留め壁をさらに短工期に構築することが可能となる。 In this way, the driving earth pressure acting on the back surface of the steel sheet is reduced, so by appropriately setting the inclination angle according to the soil properties, it is possible to omit the support work such as cutting beams and raising the belly. The collaborative action with the improvement of workability at the time of installing the sheet pile described above makes it possible to construct the earth retaining wall in a shorter construction period.

鋼板は、平板状をなす鋼板である限り、その具体的構成は任意であって、複数枚で構成してもかまわないし、単一の鋼板で構成してもよい。 The steel plate has an arbitrary specific structure as long as it is a flat steel plate, and may be composed of a plurality of sheets or a single steel plate.

また、鋼板は、矩形のものを用いる構成が典型例であって、その場合、互いに反対側となる2つの縁部は、互いに平行な2つの縁部となるとともに、親杭は、側方境界面の最大傾斜方向に沿って地盤内に配置されることになるが、側方境界面同士が例えば水平面上で互いに直交するように取り合う箇所において、該取合い箇所に逆三角形状あるいは逆台形状をなす別の側方境界面を介在させる場合には、該側方境界面に設置される土留め壁は、その側方境界面の最大傾斜方向と所定角度をなす方向に向けてかつ深さ方向に沿って離間距離が短くなるように地盤内に一対の親杭を対向配置するとともに該親杭の間に逆三角形状あるいは逆台形状をなす鋼板を配置してなる構成を採用することができる。 Further, a typical example is a structure in which a rectangular steel plate is used. In this case, the two edges opposite to each other become two edges parallel to each other, and the main pile is a lateral boundary. It will be arranged in the ground along the maximum inclination direction of the surface, but at the place where the lateral boundary surfaces meet each other so as to be orthogonal to each other on the horizontal plane, for example, an inverted triangular shape or an inverted trapezoidal shape is formed at the connecting point. When another lateral interface is interposed, the retaining wall installed on the lateral interface is oriented in a direction forming a predetermined angle with the maximum inclination direction of the lateral interface and in the depth direction. It is possible to adopt a configuration in which a pair of master piles are arranged facing each other in the ground so that the separation distance is shortened along the above, and steel plates having an inverted triangular shape or an inverted trapezoidal shape are arranged between the master piles. ..

鋼板を矩形に構成する場合、掘削深度が浅い等の事情により、親杭の材軸方向に沿った側をそれに直交する側よりも短くする構成や、同一長とした構成、すなわち正方形に形成した構成が排除されるものではないが、親杭の材軸方向に沿った側をそれに直交する側よりも長くする構成とすれば、掘削深度が大きい場合であっても、地表面近傍から根切り底近傍に至る形での配置が可能となる。 When the steel plate is formed in a rectangular shape, the side along the material axis direction of the main pile is made shorter than the side orthogonal to the side due to the shallow excavation depth, or the steel plate is formed in the same length, that is, in a square shape. Although the structure is not excluded, if the side of the main pile along the material axis direction is made longer than the side orthogonal to it, root cutting is performed from the vicinity of the ground surface even when the excavation depth is large. It can be placed near the bottom.

特に、参考発明の鋼板を、ダンプトラック、バックホウなどの建設車両のトラフィカビリティを改善するために用いられる縦横比が3〜4程度の敷鉄板とすれば、市場調達性に優れることから、土留め壁を構築する全体コストを縮減することも可能となる。 In particular, if the steel plate of the reference invention is an iron plate with an aspect ratio of about 3 to 4 used to improve the trafficability of construction vehicles such as dump trucks and backhoes, it will be excellent in market procurement. It is also possible to reduce the overall cost of building a wall.

親杭は、開削後に鋼板背面に作用する主動土圧に対し、隣り合う2本で鋼板の2つの縁部をそれぞれ係止可能である限り、どのような部材で構成してもかまわないが、これをH形鋼、I形鋼等の形鋼で構成するとともに、該形鋼を構成するフランジのうち、開削予定領域に近い掘削側フランジを上述の係止部とした構成が典型例となる。 The main pile may be made of any member as long as the two adjacent edges of the steel plate can be locked against the driving soil pressure acting on the back surface of the steel plate after excavation. A typical example is a configuration in which this is composed of shaped steel such as H-shaped steel and I-shaped steel, and among the flanges constituting the shaped steel, the flange on the excavation side near the planned excavation area is used as the above-mentioned locking portion. ..

[土留め壁構造の構築方法]
本発明に係る土留め壁構造の構築方法においては、まず、地盤内における開削予定領域とその周囲に拡がる周辺地盤との側方境界面のうち、鉛直面に対して所定の傾斜角度を有する側方境界面に沿って親杭を地表面から地盤内に挿入する。
[How to build a retaining wall structure]
In the method for constructing the earth retaining wall structure according to the present invention, first, of the lateral boundary surfaces between the planned excavation area in the ground and the surrounding ground extending around the area, the side having a predetermined inclination angle with respect to the vertical plane. Insert the parent pile from the ground surface into the ground along the boundary surface.

親杭は、例えば予めオーガーで地盤に挿入孔を形成した後、該挿入孔にバイブロハンマーを用いて揺動圧入することで地盤内への挿入が可能である。 The main pile can be inserted into the ground by, for example, forming an insertion hole in the ground with an auger in advance and then swinging and press-fitting the insertion hole into the insertion hole using a vibro hammer.

次に、平板状をなす鋼板を親杭に沿って地表面から地盤内に挿入する。 Next, a flat steel plate is inserted into the ground from the ground surface along the main pile.

鋼板は親杭と同様、例えばバイブロハンマーを用いた揺動圧入で地盤内への挿入が可能であるが、挿入の際には、該鋼板の周縁であって互いに反対側となる2つの縁部が、2本の親杭にそれぞれ設けられた係止部であってそれらの係止面上を親杭の材軸方向に沿って摺動するように行う。 Similar to the main pile, the steel plate can be inserted into the ground by rocking press-fitting using, for example, a vibro hammer, but at the time of insertion, two edges that are the peripheral edges of the steel plate and are opposite to each other. Is a locking portion provided on each of the two main piles, and slides on the locking surface of the two main piles along the material axis direction of the main pile.

なお、鋼板の縁部は、親杭に設けられた係止部の係止面上を厳密に摺動しなければならないものではなく、係止部による親杭の材軸直交方向への係止作用が維持される範囲内、例えば鋼板の厚み程度の範囲内で係止面からの離間距離を保ちつつ、親杭の材軸方向に沿って移動する形態での挿入でもかまわない。 The edge of the steel plate does not have to slide exactly on the locking surface of the locking portion provided on the master pile, and the locking portion locks the master pile in the direction orthogonal to the material axis. Insertion may be performed in a form in which the main pile moves along the material axis direction of the main pile while maintaining a distance from the locking surface within a range in which the action is maintained, for example, within a range of about the thickness of the steel plate.

このように鋼板を地盤内に挿入すると、開削予定領域に拡がる地山を掘削した後は、鋼板の背面に作用する主動土圧がその縁部を介して親杭に伝達されるとともに、該親杭の根入れ部分に作用する受動土圧が反力となって上述の主動土圧が確実に支持されることとなり、かくして鋼板が矢板となって従来の親杭横矢板工法と同等以上の土留め機能が発揮される。 When the steel plate is inserted into the ground in this way, after excavating the ground that extends to the planned excavation area, the active earth pressure acting on the back surface of the steel plate is transmitted to the parent pile via its edge, and the parent The passive earth pressure acting on the rooting part of the pile becomes a reaction force and the above-mentioned active earth pressure is surely supported. Thus, the steel plate becomes a sheet pile and the soil is equal to or higher than the conventional parent pile horizontal sheet pile method. The fastening function is demonstrated.

また、短冊状に分割された木製横矢板を一枚一枚手作業で親杭に嵌め込んでいた従来とは異なり、矢板を設置する際の作業性が格段に向上するほか、掘削前に矢板を設置することが可能であるため、従来のように掘削のための重機と矢板設置のための作業員とが根切り底で混在する事態は起こり得ず、かくして安全性についても大幅に向上する。 In addition, unlike the conventional method in which wooden horizontal sheet piles divided into strips are manually fitted into the main pile one by one, workability when installing the sheet piles is significantly improved, and sheet piles are used before excavation. Since it is possible to install the equipment, it is unlikely that heavy machinery for excavation and workers for installing sheet piles will coexist at the bottom of the root cutting as in the past, and thus safety will be greatly improved. ..

鋼板に関する説明は、土留め壁構造に係る(参考)発明で述べたと同様であるので、ここではその説明を省略する。 Since the description of the steel plate is the same as that described in the (reference) invention relating to the earth retaining wall structure, the description thereof will be omitted here.

親杭は、鋼板を上述したように摺動させ又は移動させる形態で地盤内に挿入可能である限り、どのような部材で構成してもかまわないが、これをH形鋼、I形鋼等の形鋼で構成するとともに、該形鋼を構成するフランジのうち、開削予定領域に近い掘削側フランジを上述の係止部とし、該掘削側フランジの背面を上述の係止面とする構成が典型例となる。 The main flange may be made of any member as long as it can be inserted into the ground in the form of sliding or moving the steel plate as described above, but it may be composed of H-shaped steel, I-shaped steel, etc. Of the flanges constituting the shaped steel, the drilling side flange near the planned excavation area is used as the above-mentioned locking portion, and the back surface of the drilling side flange is used as the above-mentioned locking surface. This is a typical example.

鋼板を挿入する際、上述した摺動又は移動を行うにあたり、親杭は、傾斜角度をもって地盤内に挿入されていて、係止部である掘削側フランジは鋼板の上方に位置するので、係止面である各掘削側フランジの背面と鋼板の2つの縁部とは、鋼板の自重により、親杭の材軸直交方向への係止作用が維持される範囲を越えて、互いに離間するおそれがある。 Insert a steel sheet, in performing a sliding or movement described above, the parent piles inclination angle have been inserted into the ground with, since drilling flange is engaging portion is positioned above the steel plate, the locking The back surface of each excavation side flange and the two edges of the steel plate may be separated from each other beyond the range in which the locking action of the main pile in the direction perpendicular to the material axis is maintained due to the weight of the steel plate. is there.

したがって、本発明においては、親杭の頂部近傍が地上に露出した状態で親杭の挿入工程を中断し、該親杭の地上露出部位に鋼板の挿入を案内させる形で該鋼板の挿入工程を実施し、該鋼板の挿入工程完了後、親杭の挿入工程を再開するようにする。
このようにすれば、上述の離間を防止することができる。
Therefore, in the present invention, the insertion step of the main pile is interrupted with the vicinity of the top of the main pile exposed on the ground, and the insertion step of the steel plate is guided to the exposed portion of the main pile on the ground. After the process of inserting the steel plate is completed, the process of inserting the main pile is restarted .
By doing so, the above-mentioned separation can be prevented.

鋼板の挿入を親杭の地上露出部位にどのように案内させるかは任意であって、例えば、親杭に設けられた係止面であってその地上露出部位に鋼板を押し当てながら、地盤内に挿入するようにしてもかまわないが、以下の構成、すなわち、
(a) 鋼板の挿入工程に先立ち、上述の摺動を案内する第1の案内手段を親杭の地上露出部位に設置する工程を含み、該第1の案内手段を、係止面に対向しかつ該係止面との間に鋼板の厚みに相当する間隙を形成する案内面が設けられたガイド部材で構成するとともに、これら案内面と係止面との間に鋼板が挿通された状態で鋼板の挿入工程を実施する
(b) 鋼板の挿入工程に先立ち、上述の摺動を案内する第2の案内手段を鋼板の下縁近傍に設置する工程を含み、該第2の案内手段を、係止部に係合する係合爪で構成するとともに、該係合爪が係止部に係合した状態で鋼板の挿入工程を実施する
のいずれか一方の構成を、又は両方の構成を採用するようにすれば、鋼板の2つの縁部を、各親杭の係止面に概ね摺動させることができるとともに、挿入完了時には、鋼板の2つの縁部を各係止面でそれぞれ確実に係止させることが可能となる。
How to guide the insertion of the steel plate to the above-ground exposed part of the main pile is arbitrary, for example, in the ground while pressing the steel plate against the above-ground exposed part of the locking surface provided on the main pile. It may be inserted in, but the following configuration, that is,
(a) Prior to the step of inserting the steel plate, the step of installing the first guide means for guiding the above-mentioned sliding at the above-ground exposed portion of the main pile is included, and the first guide means is opposed to the locking surface. In addition, the guide member is provided with a guide surface for forming a gap corresponding to the thickness of the steel plate between the guide surface and the locking surface, and the steel plate is inserted between the guide surface and the locking surface. Carry out the steel plate insertion process
(b) Prior to the step of inserting the steel sheet, the step of installing the second guide means for guiding the above-mentioned sliding near the lower edge of the steel sheet is included, and the second guide means is engaged with the locking portion. If one or both of the configurations of the engaging claws and the steel plate insertion step being carried out with the engaging claws engaged with the locking portion are adopted, the steel plate is formed. The two edges of the steel sheet can be generally slid on the locking surface of each parent pile, and when the insertion is completed, the two edges of the steel sheet can be securely locked on each locking surface. Become.

本実施形態に係る土留め壁構造の全体図であり、(a)は平面図、(b)はA−A線に沿う鉛直断面図。It is an overall view of the earth retaining wall structure which concerns on this embodiment, (a) is a plan view, (b) is a vertical sectional view along the line AA. 本実施形態に係る土留め壁構造の詳細図であって、(a)はB−B線方向から見た矢視図、(b)はC−C線に沿う断面図。It is a detailed view of the earth retaining wall structure which concerns on this embodiment, (a) is the arrow view seen from the direction of line BB, (b) is the sectional view along line CC. 本実施形態に係る土留め壁構造1の構築方法の手順を示した図であり、(a)は親杭7の挿入を開始した様子を、(b)は該挿入工程を中断した様子をそれぞれ示した鉛直断面図。It is a figure which showed the procedure of the construction method of the earth retaining wall structure 1 which concerns on this embodiment, (a) is a state that the insertion of the main pile 7 was started, (b) is a state that the insertion process was interrupted, respectively. The vertical sectional view shown. 引き続き本実施形態に係る土留め壁構造1の構築方法の手順を示した図であって、親杭7の頂部近傍にガイド部材41を設置した様子を示した側面図。It is the figure which showed the procedure of the construction method of the earth retaining wall structure 1 which concerns on this embodiment, and is the side view which showed the state which the guide member 41 was installed near the top of the main pile 7. 引き続き本実施形態に係る土留め壁構造1の構築方法の手順を示した図であり、(a)は鋼板8の下縁近傍に係合爪51を設置した様子を示した正面図、(b)はD−D線に沿う断面図。Subsequently, it is the figure which showed the procedure of the construction method of the earth retaining wall structure 1 which concerns on this Embodiment, (a) is the front view which showed the state which the engaging claw 51 was installed near the lower edge of a steel plate 8, (b). ) Is a cross-sectional view along the DD line. 引き続き本実施形態に係る土留め壁構造1の構築方法の手順を示した図であって、親杭7及び鋼板8の地盤2への挿入が完了した様子を示した鉛直断面図。It is the figure which showed the procedure of the construction method of the earth retaining wall structure 1 which concerns on this embodiment, and is the vertical sectional view which showed the state which the insertion into the ground 2 of the main pile 7 and the steel plate 8 was completed.

以下、本発明に係る土留め壁構造及びその構築方法の実施の形態について、添付図面を参照して説明する。 Hereinafter, embodiments of the earth retaining wall structure and the method for constructing the earth retaining wall structure according to the present invention will be described with reference to the accompanying drawings.

図1は、本実施形態に係る土留め壁構造を示した全体図である。同図でわかるように、本実施形態に係る土留め壁構造1は、地盤2内の開削予定領域3を開削してその開削範囲にエネルギー関連施設の放水路を構築する際の土留め工に適用されるものであって、開削予定領域3とその周囲に拡がる周辺地盤との間には、水平に延びる長方形状の境界面4が仮想的に形成されているほか、境界面4の短手縁部からそれぞれ直立する一対の側方境界面5,5と、境界面4の長手縁部からそれぞれ斜めに、本実施形態では鉛直面に対して10゜の傾斜角度で立ち上がる一対の側方境界面6,6とからなる4つの側方境界面とが仮想的に形成されており、開削予定領域3を掘削する際には、側方境界面5,5に一対の直立土留め壁が、側方境界面6,6には一対の傾斜土留め壁がそれぞれ構築される。 FIG. 1 is an overall view showing a retaining wall structure according to the present embodiment. As can be seen in the figure, the earth retaining wall structure 1 according to the present embodiment is used as an earth retaining work when excavating the planned excavation area 3 in the ground 2 and constructing a drainage channel of an energy-related facility in the excavation range. It is applied, and a horizontally extending rectangular boundary surface 4 is virtually formed between the planned excavation area 3 and the surrounding ground extending around it, and the short side of the boundary surface 4 A pair of lateral boundary surfaces 5 and 5 that stand upright from the edge and a pair of lateral boundaries that rise diagonally from the longitudinal edge of the boundary 4 at an inclination angle of 10 ° with respect to the vertical plane in the present embodiment. Four side boundary surfaces consisting of surfaces 6 and 6 are virtually formed, and when excavating the planned excavation area 3, a pair of upright retaining walls are formed on the side boundary surfaces 5 and 5. A pair of inclined retaining walls are constructed on the side boundary surfaces 6 and 6, respectively.

ここで、本実施形態に係る土留め壁構造1は、上述した4つの側方境界面のうち、側方境界面6に沿ってかつその最大傾斜方向に沿って親杭7を地盤2内に列状に配置してあるとともに、該親杭に沿って鋼板8を地盤2内に配置してあり、これら親杭7及び鋼板8が上述した傾斜土留め壁を構成する。 Here, in the earth retaining wall structure 1 according to the present embodiment, the main pile 7 is placed in the ground 2 along the lateral boundary surface 6 and along the maximum inclination direction of the four lateral boundary surfaces described above. The steel plates 8 are arranged in a row and along the master piles in the ground 2, and the master piles 7 and the steel plates 8 form the above-mentioned inclined earth retaining wall.

親杭7は、H形鋼で構成してある。 The main pile 7 is made of H-shaped steel.

鋼板8は、縦横比が3〜4程度の矩形でかつ平板状をなすもので構成するが、具体的には、ダンプトラック、バックホウなどの建設車両のトラフィカビリティを改善するために用いられる敷鉄板を転用することが可能であり、さらに具体的には、約1.5m×6mの敷鉄板を用いることができる。 The steel plate 8 is composed of a rectangular steel plate having an aspect ratio of about 3 to 4 and a flat plate shape. Specifically, the steel plate 8 is a paving iron plate used for improving the trafficability of construction vehicles such as dump trucks and backhoes. Can be diverted, and more specifically, an iron plate of about 1.5 m × 6 m can be used.

図2は、親杭7及び鋼板8の配置状況を示したものである。同図でわかるように、鋼板8は、親杭7のうち、互いに隣り合う2本の親杭7,7の各フランジであって開削予定領域3に近い掘削側フランジを係止部13,13として、該各係止部により、鋼板8の周縁であって互いに平行な2つの縁部11,11(以下、2つの平行縁部11,11)が親杭7,7の材軸直交方向にそれぞれ係止されるように配置してある。 FIG. 2 shows the arrangement of the main pile 7 and the steel plate 8. As can be seen in the figure, the steel plate 8 locks the drilling side flanges 13 and 13 of the main piles 7 which are the flanges of the two main piles 7 and 7 adjacent to each other and which are close to the planned excavation area 3. As a result, the two edge portions 11, 11 (hereinafter, the two parallel edge portions 11, 11) which are the peripheral edges of the steel plate 8 and are parallel to each other are arranged in the direction orthogonal to the material axis of the main piles 7, 7 by the respective locking portions. They are arranged so that they can be locked.

本実施形態に係る土留め壁構造1を構築するには、まず図3(a)に示すように、側方境界面6に沿ってかつその最大傾斜方向に沿って、親杭7を地表面から地盤2内に等間隔で列状に挿入する。 In order to construct the earth retaining wall structure 1 according to the present embodiment, first, as shown in FIG. 3A, the main pile 7 is placed on the ground surface along the lateral boundary surface 6 and along the maximum inclination direction thereof. It is inserted into the ground 2 in a row at equal intervals.

親杭7は、例えば予めオーガーで地盤に挿入孔を形成した後、該挿入孔にバイブロハンマーを用いて揺動圧入することで、地盤2内に挿入すればよい。 The main pile 7 may be inserted into the ground 2 by, for example, forming an insertion hole in the ground with an auger in advance and then swinging and press-fitting the insertion hole into the insertion hole using a vibro hammer.

親杭7を挿入するにあたっては、例えば油圧ショベルを構成するベースマシンのアタッチメントをバイブロハンマーに交換した上、該バイブロハンマーで親杭7頂部のウェブを把持して該親杭を揺動圧入すればよいが、必要があれば、側方境界面6に沿った最大傾斜角度、本実施形態であれば10゜を維持すべく、10゜の傾斜角を有する鉄骨架台を予め製作し、その鉄骨架台の傾斜面に親杭7をあてがうようにすればよい。 When inserting the main pile 7, for example, if the attachment of the base machine constituting the hydraulic excavator is replaced with a vibro hammer, the web at the top of the main pile 7 is gripped by the vibro hammer and the main pile is oscillated and press-fitted. It is good, but if necessary, in order to maintain the maximum inclination angle along the lateral boundary surface 6 and 10 ° in this embodiment, a steel frame frame having an inclination angle of 10 ° is manufactured in advance, and the steel frame frame is manufactured. The main pile 7 may be applied to the inclined surface of the above.

ここで、親杭7は、予定された深さまで打ち込むのではなく、同図(b)に示すように、その頂部近傍を地上露出部位31として地上に露出させ、かかる状態で挿入工程をいったん中断する。 Here, instead of driving the main pile 7 to the planned depth, as shown in FIG. 3B, the vicinity of the top thereof is exposed to the ground as the ground exposed portion 31, and the insertion process is temporarily interrupted in this state. To do.

次に、図4に示すように、親杭7の地上露出部位31に第1の案内手段としてのガイド部材41を上下二段に設置する。 Next, as shown in FIG. 4, a guide member 41 as a first guide means is installed in two upper and lower stages on the ground-exposed portion 31 of the main pile 7.

ガイド部材41は、横置き、すなわち底版が鉛直になる姿勢で配置される鋼製ボックス43と該鋼製ボックスを親杭7の非掘削側フランジ44に固定するクランプ42とで構成してあるとともに、鋼製ボックス43の周面のうち、掘削側フランジである係止部13の側に該係止部の背面である係止面12に対向しかつ該係止面との間に鋼板8の厚みに相当する間隙を形成する案内面45を形成してあり、案内面45と係止面12との間に鋼板8を挿通することにより、鋼板8の2つの平行縁部11,11を係止部13,13の係止面12,12上に当接させるとともに、かかる状態で鋼板8を下方に押し下げることで、平行縁部11,11を係止面12,12上で概ね摺動させながら、該鋼板を地盤2内に挿入することができるようになっている。 The guide member 41 is composed of a steel box 43 arranged horizontally, that is, in a posture in which the bottom slab is vertical, and a clamp 42 for fixing the steel box to the non-excavated side flange 44 of the main pile 7. Of the peripheral surface of the steel box 43, the steel plate 8 faces the locking surface 12 which is the back surface of the locking portion on the side of the locking portion 13 which is the excavation side flange, and is between the locking surface and the locking surface 12. A guide surface 45 that forms a gap corresponding to the thickness is formed, and by inserting the steel plate 8 between the guide surface 45 and the locking surface 12, the two parallel edge portions 11 and 11 of the steel plate 8 are engaged. The parallel edge portions 11 and 11 are substantially slid on the locking surfaces 12 and 12 by abutting the stopping portions 13 and 13 on the locking surfaces 12 and 12 and pushing the steel plate 8 downward in this state. However, the steel plate can be inserted into the ground 2.

ガイド部材41が設置されたならば、図4の一点鎖線で示したように、ガイド部材41の案内面45と係止部13の係止面12との間に鋼板8の下縁を差し込み、この状態を保持したまま、図5に示すように、鋼板8に第2の案内手段としての係合爪51,51を設置する。 When the guide member 41 is installed, as shown by the alternate long and short dash line in FIG. 4, the lower edge of the steel plate 8 is inserted between the guide surface 45 of the guide member 41 and the locking surface 12 of the locking portion 13. While maintaining this state, as shown in FIG. 5, engaging claws 51 and 51 as second guiding means are installed on the steel plate 8.

係合爪51は、鋼板8の各縁部11との間に各親杭7の係止部13をそれぞれ挟み込む形となるように、該鋼板の掘削面側の下縁近傍であってその左右に溶接等で固定してあり、上述のように親杭7の係止部13に係合した状態で、鋼板8を下方に押し下げることにより、鋼板8の平行縁部11,11を係止面12,12上で概ね摺動させながら、該鋼板を地盤2内に挿入することができるようになっている。 The engaging claws 51 are located near the lower edge of the steel plate 8 on the drilling surface side and are left and right thereof so that the locking portions 13 of the main piles 7 are sandwiched between the engaging claws 51 and the edges 11 of the steel plate 8. By pushing down the steel plate 8 in a state where it is engaged with the locking portion 13 of the main pile 7 as described above, the parallel edge portions 11 and 11 of the steel plate 8 are locked to the locking surface. The steel plate can be inserted into the ground 2 while being substantially slid on the 12th and 12th.

このように、鋼板8をガイド部材41の案内面45と係止面12との間に挿通させるとともに、係合爪51を親杭7の係止部13に係合させたならば、かかる状態で、鋼板8を下方に押し下げて地盤2内に挿入する。 In this way, if the steel plate 8 is inserted between the guide surface 45 and the locking surface 12 of the guide member 41 and the engaging claw 51 is engaged with the locking portion 13 of the main pile 7, this state is achieved. Then, the steel plate 8 is pushed down and inserted into the ground 2.

鋼板8の挿入工程が完了したならば、親杭7の挿入作業を再開し、地上露出部位31として地上に露出した頂部近傍を地盤2内に挿入する(図6参照)。 When the insertion step of the steel plate 8 is completed, the insertion work of the main pile 7 is restarted, and the vicinity of the top exposed on the ground is inserted into the ground 2 as the ground exposed portion 31 (see FIG. 6).

このようにして親杭7及び鋼板8からなる傾斜土留め壁を構築したならば、鋼板8を矢板として開削予定領域3に拡がる地山を掘削し、掘削された範囲に構造物を構築後、該構造物周囲を埋め戻し、しかる後、鋼板8を地盤2から引き抜いて撤去する。 After constructing the inclined earth retaining wall composed of the main pile 7 and the steel plate 8 in this way, the ground extending to the planned excavation area 3 is excavated using the steel plate 8 as a sheet pile, and after the structure is constructed in the excavated area, the structure is constructed. The periphery of the structure is backfilled, and then the steel plate 8 is pulled out from the ground 2 and removed.

以上説明したように、本実施形態に係る土留め壁構造1によれば、開削予定領域3に拡がる地山を掘削した後は、鋼板8の背面に作用する主動土圧がその縁部11,11を介して親杭7に伝達されるとともに、該親杭の根入れ部分に作用する受動土圧が反力となって上述の主働土圧が確実に支持されることとなる。また、鋼板8は従来使用する木製の横矢板よりも強度が非常に高いことから、従来の親杭横矢板工法と同等以上の土留め機能が発揮される。 As described above, according to the earth retaining wall structure 1 according to the present embodiment, after excavating the ground extending to the planned excavation area 3, the driving earth pressure acting on the back surface of the steel plate 8 is the edge portion 11, The passive earth pressure acting on the rooting portion of the parent pile becomes a reaction force while being transmitted to the parent pile 7 via the main pile 11, and the above-mentioned active earth pressure is surely supported. Further, since the steel plate 8 has much higher strength than the wooden horizontal sheet pile used conventionally, the earth retaining function equal to or higher than that of the conventional main pile horizontal sheet pile method is exhibited.

また、本実施形態に係る土留め壁構造1及びその構築方法によれば、機械的圧力で鋼板8を地表面から挿入配置する、とりわけ地表面近傍から根切り底近傍に至る長さで挿入配置することができるため、短冊状に分割された木製横矢板を一枚一枚手作業で親杭に嵌め込んでいた従来とは異なり、矢板を設置する際の作業性が格段に向上するほか、掘削前に鋼板8を設置することが可能であるため、従来のように掘削のための重機と矢板設置のための作業員とが根切り底で混在する事態は起こり得ず、かくして安全性についても大幅に向上する。 Further, according to the earth retaining wall structure 1 and the construction method thereof according to the present embodiment, the steel plate 8 is inserted and arranged from the ground surface by mechanical pressure, and particularly, the steel plate 8 is inserted and arranged with a length from the vicinity of the ground surface to the vicinity of the root cutting bottom. Unlike the conventional method in which wooden horizontal sheet piles divided into strips are manually fitted into the main pile, the workability when installing the sheet piles is significantly improved. Since it is possible to install the steel plate 8 before excavation, it is unlikely that heavy machinery for excavation and workers for sheet pile installation will coexist at the root cutting bottom as in the past, and thus safety. Will also improve significantly.

また、本実施形態に係る土留め壁構造1によれば、開削予定領域3の側方境界面のうち、鉛直面に対して傾斜角度を有する側方境界面6に沿ってかつその最大傾斜方向に沿って親杭7を地盤2内に配置するとともに、該親杭に沿って上述したように鋼板8を地盤2内に配置するようにしたので、鋼板8の背面に作用する主動土圧が軽減される。 Further, according to the earth retaining wall structure 1 according to the present embodiment, among the lateral boundary surfaces of the planned excavation area 3, along the lateral boundary surface 6 having an inclination angle with respect to the vertical surface and in the maximum inclination direction thereof. Since the main pile 7 is arranged in the ground 2 along the main pile and the steel plate 8 is arranged in the ground 2 along the main pile as described above, the driving earth pressure acting on the back surface of the steel plate 8 is increased. It will be reduced.

そのため、土質性状に合わせて傾斜角度を適宜設定することにより、切梁、腹起こしといった支保工を省略することが可能となり、かくして上述した矢板設置時の作業性改善との協働作用によって、土留め壁をさらに短工期に構築することが可能となる。 Therefore, by appropriately setting the inclination angle according to the soil properties, it is possible to omit the support work such as cutting beams and abdominal raising, and thus the soil works in cooperation with the workability improvement at the time of sheet pile installation described above. It will be possible to construct the retaining wall in a shorter construction period.

また、本実施形態に係る土留め壁構造1によれば、上述したように地表面近傍から根切り底近傍に至る長さで鋼板8を構成することができるため、埋め戻し後にこれを引き抜くことで鋼板8を容易に撤去することが可能となり、材料自体の転用容易性とも相俟って、土木資材の有効利用も可能となる。 Further, according to the earth retaining wall structure 1 according to the present embodiment, since the steel plate 8 can be formed with a length from the vicinity of the ground surface to the vicinity of the root cutting bottom as described above, it is pulled out after backfilling. The steel plate 8 can be easily removed, and the civil engineering material can be effectively used in combination with the ease of diversion of the material itself.

また、本実施形態に係る土留め壁構造の構築方法によれば、鋼板8をガイド部材41の案内面45と係止面12との間に挿通させるとともに、係合爪51を親杭7の係止部13に係合させ、かかる状態で、鋼板8を下方に押し下げて地盤2内に挿入するようにしたので、鋼板8の2つの平行縁部11,11を、親杭7,7の係止面12,12に概ね摺動させることができるとともに、挿入完了時には、該2つの平行縁部11,11を各係止面12,12でそれぞれ確実に係止させることが可能となる。 Further, according to the method for constructing the earth retaining wall structure according to the present embodiment, the steel plate 8 is inserted between the guide surface 45 and the locking surface 12 of the guide member 41, and the engaging claw 51 is inserted into the main pile 7. Since the steel plate 8 was pushed downward and inserted into the ground 2 in this state by engaging with the locking portion 13, the two parallel edge portions 11 and 11 of the steel plate 8 were inserted into the main piles 7 and 7. It can be substantially slid on the locking surfaces 12 and 12, and when the insertion is completed, the two parallel edge portions 11 and 11 can be reliably locked on the locking surfaces 12 and 12, respectively.

本実施形態では、本発明の鋼板を、敷鉄板からなる単一の鋼板8で構成したが、もちろん敷鉄板に限定されるものではないし、単一の鋼板で構成する必要もない。例えば、市場で流通する汎用の鋼板を順次溶接等で継ぎ足しながら地盤内に挿入する構成でもかまわない。 In the present embodiment, the steel plate of the present invention is composed of a single steel plate 8 made of a steel plate, but of course, the steel plate is not limited to the steel plate, and it is not necessary to use a single steel plate. For example, a general-purpose steel sheet distributed in the market may be sequentially added by welding or the like and inserted into the ground.

また、本実施形態では、鋼板8をガイド部材41の案内面45と係止面12との間に挿通させるとともに、係合爪51を親杭7の係止部13に係合させ、かかる状態で、鋼板8を下方に押し下げて地盤2内に挿入するようにしたが、ガイド部材41又は係合爪51のいずれかのみで、鋼板8の2つの平行縁部11,11を、親杭7,7の係止面12,12に概ね摺動させることができるのであれば、これらのうち、一方を省略してもかまわないし、さらに言えば、ガイド部材41や係合爪51がなくても、鋼板8の2つの平行縁部11,11を親杭7の各係止部13,13に係止させて該鋼板を矢板として機能させることができるのであれば、ガイド部材41及び係合爪51を省略してもかまわない。 Further, in the present embodiment, the steel plate 8 is inserted between the guide surface 45 and the locking surface 12 of the guide member 41, and the engaging claw 51 is engaged with the locking portion 13 of the main pile 7 to be engaged. Therefore, the steel plate 8 was pushed downward and inserted into the ground 2, but the two parallel edge portions 11 and 11 of the steel plate 8 were inserted into the ground 2 by using only the guide member 41 or the engaging claw 51. As long as it can be generally slid on the locking surfaces 12 and 12, one of these may be omitted, and further, even if the guide member 41 and the engaging claw 51 are not provided. If the two parallel edge portions 11 and 11 of the steel plate 8 can be locked to the locking portions 13 and 13 of the main pile 7 and the steel plate can function as a sheet pile, the guide member 41 and the engaging claws. 51 may be omitted.

また、本実施形態では、親杭7を側方境界面6の最大傾斜方向に沿って地盤2内に列状に配置するとともに、該親杭に沿って配置される鋼板8を矩形としたが、本発明においては、隣り合う親杭7,7の係止部13,13に鋼板8の2つの平行縁部11,11が係止されれば足りるのであって、係止部13は、フランジ幅の約半分の係り代を有するため、この係り代の範囲内であれば、親杭7の配置角度が最大傾斜方向から若干ずれてもかまわないし、鋼板8が厳密な矩形(長方形又は正方形)でなくてもかまわない。 Further, in the present embodiment, the main piles 7 are arranged in a row in the ground 2 along the maximum inclination direction of the lateral boundary surface 6, and the steel plates 8 arranged along the main piles are rectangular. In the present invention, it is sufficient that the two parallel edge portions 11 and 11 of the steel plate 8 are locked to the locking portions 13 and 13 of the adjacent main piles 7 and 7, and the locking portion 13 is a flange. Since it has a engagement allowance of about half the width, the arrangement angle of the main pile 7 may deviate slightly from the maximum inclination direction as long as it is within the range of this engagement allowance, and the steel plate 8 is a strict rectangle (rectangle or square). It doesn't have to be.

1 土留め壁構造
2 地盤
3 開削予定領域
6 側方境界面
7 親杭
8 鋼板
11,11 鋼板8の2つの平行縁部
12 係止面
13 係止部,掘削側フランジ
31 地上露出部位
41 ガイド部材(第1の案内手段)
45 案内面
51 係合爪(第2の案内手段)
1 Retaining wall structure 2 Ground 3 Planned excavation area 6 Side boundary surface 7 Main pile 8 Steel plate 11, 11 Two parallel edges of steel plate 8 12 Locking surface 13 Locking part, excavation side flange 31 Ground exposed part 41 Guide Member (first guiding means)
45 Guide surface 51 Engagement claw (second guide means)

Claims (4)

地盤内における開削予定領域とその周囲に拡がる周辺地盤との側方境界面のうち、鉛直面に対して所定の傾斜角度を有する側方境界面に沿って親杭を地表面から地盤内に挿入し、
平板状をなす鋼板を、その周縁であって互いに反対側となる2つの縁部が、前記親杭のうち、互いに隣り合う2本の親杭にそれぞれ設けられた係止部であってそれらの係止面上を前記親杭の材軸方向に沿って摺動し又は前記係止部による前記親杭の材軸直交方向への係止作用が維持される範囲内で前記係止面からの離間距離を保ちつつ前記親杭の材軸方向に沿って移動するように、地表面から前記地盤内に挿入する土留め壁構造の構築方法であって、
前記親杭の頂部近傍が地上に露出した状態で前記親杭の挿入工程を中断し、該親杭の地上露出部位に前記鋼板の挿入を案内させる形で該鋼板の挿入工程を実施し、該鋼板の挿入工程完了後、前記親杭の挿入工程を再開することを特徴とする土留め壁構造の構築方法。
Of the lateral boundary surfaces between the planned excavation area in the ground and the surrounding ground that extends around it, the parent pile is inserted from the ground surface into the ground along the lateral boundary surface that has a predetermined inclination angle with respect to the vertical plane. And
The two edges of the flat plate-shaped steel plate, which are peripheral edges and are opposite to each other, are locking portions provided on the two parent piles adjacent to each other among the parent piles. From the locking surface within a range in which the locking surface slides along the material axis direction of the parent pile or the locking action of the locking portion in the direction perpendicular to the material axis of the parent pile is maintained. It is a method of constructing a retaining wall structure that is inserted into the ground from the ground surface so as to move along the material axis direction of the main pile while maintaining a separation distance.
The insertion step of the master pile is interrupted in a state where the vicinity of the top of the master pile is exposed to the ground, and the insertion step of the steel plate is carried out so as to guide the insertion of the steel plate to the exposed portion of the master pile above the ground. A method for constructing a retaining wall structure, characterized in that the insertion process of the main pile is restarted after the insertion process of the steel plate is completed.
前記親杭を形鋼で構成するとともに、該形鋼を構成するフランジのうち、前記開削予定領域に近い掘削側フランジを前記係止部、該掘削側フランジの背面を前記係止面とした請求項1記載の土留め壁構造の構築方法。 Thereby forming the parent piles in the form steel, among flanges constituting the transformant steel, wherein said locking portion of the drilling flange closer to the excavation region where the rear of the drilling flange and said engaging surface Item 1. The method for constructing a retaining wall structure according to item 1 . 前記鋼板の挿入工程に先立ち、前記摺動を案内する第1の案内手段を前記親杭の地上露出部位に設置する工程を含み、該第1の案内手段を、前記係止面に対向しかつ該係止面との間に前記鋼板の厚みに相当する間隙を形成する案内面が設けられたガイド部材で構成するとともに、前記案内面と前記係止面との間に前記鋼板が挿通された状態で前記鋼板の挿入工程を実施する請求項1又は請求項2記載の土留め壁構造の構築方法。 Prior to the step of inserting the steel plate, the step of installing the first guide means for guiding the sliding at the above-ground exposed portion of the main pile is included, and the first guide means is opposed to the locking surface. It is composed of a guide member provided with a guide surface that forms a gap corresponding to the thickness of the steel plate between the locking surface and the steel plate, and the steel plate is inserted between the guide surface and the locking surface. The method for constructing a retaining wall structure according to claim 1 or 2 , wherein the step of inserting the steel plate is carried out in a state. 前記鋼板の挿入工程に先立ち、前記摺動を案内する第2の案内手段を前記鋼板の下縁近傍に設置する工程を含み、該第2の案内手段を、前記係止部に係合する係合爪で構成するとともに、該係合爪が前記係止部に係合した状態で前記鋼板の挿入工程を実施する請求項1又は請求項2記載の土留め壁構造の構築方法。 Prior to the step of inserting the steel plate, a step of installing a second guide means for guiding the sliding in the vicinity of the lower edge of the steel plate is included, and the second guide means is engaged with the locking portion. The method for constructing a retaining wall structure according to claim 1 or 2 , wherein the steel plate is inserted in a state where the engaging claw is engaged with the locking portion while being composed of a combined claw.
JP2016139754A 2016-07-14 2016-07-14 How to build a retaining wall structure Active JP6804034B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016139754A JP6804034B2 (en) 2016-07-14 2016-07-14 How to build a retaining wall structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016139754A JP6804034B2 (en) 2016-07-14 2016-07-14 How to build a retaining wall structure

Publications (2)

Publication Number Publication Date
JP2018009393A JP2018009393A (en) 2018-01-18
JP6804034B2 true JP6804034B2 (en) 2020-12-23

Family

ID=60993477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016139754A Active JP6804034B2 (en) 2016-07-14 2016-07-14 How to build a retaining wall structure

Country Status (1)

Country Link
JP (1) JP6804034B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7059344B1 (en) 2020-12-16 2022-04-25 丸建基礎工事株式会社 Parent pile horizontal sheet pile method

Also Published As

Publication number Publication date
JP2018009393A (en) 2018-01-18

Similar Documents

Publication Publication Date Title
KR101640795B1 (en) Furlable earth retaining structure for provisional facilities and construction method thereof
KR100846229B1 (en) Establishment Method of Soil Guard Structure
KR101474515B1 (en) Earth retaining wall using support and panel, method for constructing the same
KR200452946Y1 (en) Welded H type steel sheet pile and integrated composite order wall
KR101843023B1 (en) Shear connector for temporary retaining wall file and building outer wall, and method for constructing an underground structure using thereof
KR101862208B1 (en) Earth retaining wall structure and constructuon mothod thereof
JP6804034B2 (en) How to build a retaining wall structure
JP2017218751A (en) Concrete assembly retaining wall
JP6710999B2 (en) Temporary receiving method for existing structures
KR200369479Y1 (en) The land-side protection wall panel
JP5739051B1 (en) Liquefaction countermeasure structure for ground improvement solid foundation and correction method for occurrence of uneven settlement due to liquefaction
KR102013783B1 (en) Steel pipe, underground structure and cast messer shield method
JP7230313B2 (en) Basement structure and construction method of basement
KR101724407B1 (en) Self-supported soil retaining structure
JP2018197490A (en) Concrete sheet pile member, earth retaining wall and method for constructing earth retaining wall
JP4889993B2 (en) Construction method of widening shaft
KR100669530B1 (en) Construction method of a rataining well
JP6999483B2 (en) Guide wall and how to build a guide wall
KR101045663B1 (en) Wall-Foundation system
KR102604260B1 (en) Earth retaining wall and its construction method
JP7301203B1 (en) Earth retaining device for shallow excavated trenches
JP7384755B2 (en) Core material and upper core material removal method
JP6353430B2 (en) Friction cut plate joining method
KR20110003638A (en) Water leakage panel structure and construction method for ground protection of earths wall
JP2521795Y2 (en) Retaining material

Legal Events

Date Code Title Description
A80 Written request to apply exceptions to lack of novelty of invention

Free format text: JAPANESE INTERMEDIATE CODE: A80

Effective date: 20160722

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190620

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200604

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200701

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200807

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20201102

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20201115

R150 Certificate of patent or registration of utility model

Ref document number: 6804034

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150