JP6842052B1 - How to build a bag material for backfilling and a shaft - Google Patents
How to build a bag material for backfilling and a shaft Download PDFInfo
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- JP6842052B1 JP6842052B1 JP2020173008A JP2020173008A JP6842052B1 JP 6842052 B1 JP6842052 B1 JP 6842052B1 JP 2020173008 A JP2020173008 A JP 2020173008A JP 2020173008 A JP2020173008 A JP 2020173008A JP 6842052 B1 JP6842052 B1 JP 6842052B1
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- 239000000463 material Substances 0.000 title claims abstract description 228
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 abstract 1
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
【課題】土留材と地山との間の隙間を、裏込め材でより密に充填可能とする裏込め用袋材を提供すること。【解決手段】軸方向Ｘおよび周方向Ｙに複数連結するライナープレートＢなどの土留材の背面に取り付ける裏込め用袋材Ａであって、内部に裏込め材を充填可能な注入口２０を設けた袋本体１０を少なくとも有し、袋本体１０の縦方向を前記軸方向Ｘとし、かつ袋本体１０の横方向を前記周方向Ｙとしたときに、袋本体１０の縦方向側の伸度を袋本体１０の横方向側の伸度よりも大きくし、かつ袋本体１０の内部に袋本体１０の縦方向に離隔した箇所間の距離を保持するように形状保持材４０を配置することで、裏込め材の充填時における袋本体１０の膨張方向を制御する。【選択図】図５PROBLEM TO BE SOLVED: To provide a backfill bag material capable of more densely filling a gap between an earth retaining material and a ground with a backfill material. SOLUTION: This is a backfill bag material A attached to the back surface of a retaining material such as a liner plate B connected in a plurality of axial directions X and a circumferential direction Y, and an injection port 20 capable of filling the backfill material is provided inside. When the bag main body 10 is at least held, the vertical direction of the bag main body 10 is the axial direction X, and the horizontal direction of the bag main body 10 is the circumferential direction Y, the elongation on the vertical side of the bag main body 10 is set. By arranging the shape-retaining material 40 so as to be larger than the elongation on the lateral side of the bag body 10 and to maintain the distance between the vertically separated parts of the bag body 10 inside the bag body 10. The expansion direction of the bag body 10 at the time of filling the backfill material is controlled. [Selection diagram] FIG. 5
Description
本発明は、構造物の構築時に使用する土留材の背面に裏込め材を注入するための裏込め用袋材および当該裏込め用袋材を用いた立坑の構築方法に関する。 The present invention relates to a backfill bag material for injecting a backfill material into the back surface of an earth retaining material used when constructing a structure, and a method for constructing a shaft using the backfill bag material.
立坑等の構築時に、地山の余堀の結果、土留材と地山との間に隙間が生じる場合がある。
従来、この隙間を、モルタルなどの裏込め材を充填することで土留材と地山とを一体化することが行われている。
例えば、以下の特許文献１には、ライナープレートの背面に配置する袋状容器からなる崩落防止・止水用部材が開示されており、この容器に裏込め材を注入することで容器を膨らませてライナープレートと地山との間の隙間を塞ぐ技術が開示されている。
When constructing a shaft, etc., a gap may be created between the earth retaining material and the ground as a result of the surplus moat of the ground.
Conventionally, the earth retaining material and the ground have been integrated by filling this gap with a backfilling material such as mortar.
For example, Patent Document 1 below discloses a collapse-preventing / water-stopping member made of a bag-shaped container arranged on the back surface of a liner plate, and the container is inflated by injecting a backfill material into the container. A technique for closing the gap between the liner plate and the ground is disclosed.
しかし、特許文献１に記載の発明では、以下に記載する課題のうち少なくとも何れか１つの課題を有する。
（１）容器内の注入口より鉛直方向上部側の空間や、ライナープレートの凹凸箇所、その他凹凸の大きい箇所へと裏込め材が充填されにくい。
（２）充填された裏込め材がライナープレートの周方向の未連結側端部からはみ出す態様で膨らんでしまうと、その後のライナープレートの連結作業に支障をきたす場合があることから、予め一周分のライナープレートを全て連結させてから裏込め材の充填作業を行うなどの対策が必要だった。
そのため、終電から始発までの短い時間で作業を行う必要がある鉄道工事などでの適用に向いていなかった。
（３）ライナープレート間に補強リングを取り付けた場合、裏込め材の充填によって膨らむ容器の形状が補強リング周辺の狭小な空間に追従できず、裏込め材の充填が不十分となる場合があった。
However, the invention described in Patent Document 1 has at least one of the problems described below.
(1) It is difficult for the backfill material to fill the space on the upper side in the vertical direction from the injection port in the container, the uneven portion of the liner plate, and other irregular portions.
(2) If the filled backfill material swells in a manner that protrudes from the unconnected end of the liner plate in the circumferential direction, it may interfere with the subsequent connection work of the liner plate. It was necessary to take measures such as filling the backfill material after connecting all the liner plates.
Therefore, it was not suitable for application in railway construction where work needs to be done in a short time from the last train to the first train.
(3) When a reinforcing ring is attached between the liner plates, the shape of the container that expands due to the filling of the backfilling material may not be able to follow the narrow space around the reinforcing ring, and the filling of the backfilling material may be insufficient. It was.
よって、本発明は、土留材と地山との間の隙間を、裏込め材でより密に充填可能とする裏込め用袋材を提供することを目的の一つとする。 Therefore, one of the objects of the present invention is to provide a bag material for backfilling, which enables the gap between the earth retaining material and the ground to be filled more densely with the backfilling material.
上記課題を解決すべくなされた本願の第１発明は、土留材を軸方向および周方向に複数連結して構造物を構成する際に、前記土留材の背面に取り付ける、裏込め用袋材であって、裏込め材を充填可能な注入口を設けた、袋本体と、前記袋本体の内部に配置する、形状保持材と、を少なくとも有し、前記袋本体の縦方向を前記構造物の軸方向とし、かつ前記袋本体の横方向を前記構造物の周方向としたときに、前記袋本体の縦方向側の伸度を、前記袋本体の横方向側の伸度よりも大きく構成し、前記形状保持材が、前記袋本体の縦方向に離隔した箇所間の距離を保持するように前記袋本体に取り付けてあることを特徴とする。
また、本願の第２発明は、前記第１発明において、前記形状保持材が、シート状物からなり、前記シート状物の上縁と下縁を袋本体に固定してあり、前記シート状物の両側縁と、前記袋本体との間を開放してあることを特徴とする。
また、本願の第３発明は、前記第２発明において、前記シート状物に、当該シート状物の前背面を連通させる連通部を形成してあることを特徴とする。
また、本願の第４発明は、前記第１発明乃至第３発明のうち何れか１つの発明において、前記袋本体を構成する生地の縦方向側の伸度が５０％以上であり、横方向側の伸度が３０％以下であることを特徴とする。
また、本願の第５発明は、前記第１発明乃至第４発明のうち何れか１つの発明において、前記袋本体に、前記袋本体の前後方向に分岐した二叉部を呈していることを特徴とする。
また、本願の第６発明は、立坑の内側に土留材を軸方向および周方向に複数連結して構造物を構築してなる、立坑の構築方法であって、前記構造物の両端を構成する土留材に、前記第１発明乃至第５発明のうち何れか１つに記載の裏込め用袋材を取り付けておき、前記裏込め用袋材に裏込め材を充填して、前記構造物の両側端の土留材と地山との間に閉塞空間を形成し、
前記閉塞空間に裏込め材を充填する。
また、本願の第７発明は、立坑の内側に土留材を軸方向および周方向に複数連結して構造物を構築してなる、立坑の構築方法であって、前記構造物の両端を構成する土留材に、前記第１発明乃至第５発明のうち何れか１つに記載の裏込め用袋材を取り付けておき、前記土留材の下方に設けてある、形鋼からなる補強リングのフランジに形状保持材の端部を当接させた状態で、前記裏込め用袋材に裏込め材を充填することを特徴とする。
また、本願の第８発明は、立坑の内側に土留材を軸方向および周方向に複数連結して構造物を構築してなる、立坑の構築方法であって、前記構造物の両端を構成する土留材に、前記第５発明に記載の裏込め用袋材を取り付けておき、前記土留材の下方に設けてある、形鋼からなる補強リングのフランジに対し、前記二叉部の前面側の分岐端が補強リングのウェブ側に位置し、二叉部の背面側の分岐端が前記補強リングと地山との間に位置した状態で、前記裏込め用袋材に裏込め材を充填することを特徴とする。
The first invention of the present application, which has been made to solve the above problems, is a bag material for backfilling, which is attached to the back surface of the earth retaining material when a plurality of earth retaining materials are connected in the axial direction and the circumferential direction to form a structure. It has at least a bag body provided with an injection port capable of filling the backfill material and a shape-retaining material arranged inside the bag body, and the vertical direction of the bag body is the structure. When the axial direction and the lateral direction of the bag body are the circumferential direction of the structure, the elongation on the vertical side of the bag body is configured to be larger than the elongation on the lateral side of the bag body. The shape-retaining material is attached to the bag body so as to maintain a distance between the vertically separated portions of the bag body.
Further, in the second invention of the present application, in the first invention, the shape-retaining material is made of a sheet-like material, and the upper edge and the lower edge of the sheet-like material are fixed to the bag body. It is characterized in that the space between both side edges of the bag and the bag body is open.
Further, the third invention of the present application is characterized in that, in the second invention, the sheet-like object is formed with a communication portion for communicating the front and back surfaces of the sheet-like object.
Further, in the fourth invention of the present application, in any one of the first to third inventions, the elongation on the vertical side of the fabric constituting the bag body is 50% or more, and the elongation on the horizontal side is 50% or more. Is characterized in that the elongation of is 30% or less.
Further, the fifth invention of the present application is characterized in that, in any one of the first to fourth inventions, the bag body is provided with a bifurcated portion branched in the front-rear direction of the bag body. And.
Further, the sixth invention of the present application is a method for constructing a shaft by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft, and constitutes both ends of the structure. The backfilling bag material according to any one of the first to fifth inventions is attached to the earth retaining material, and the backfilling bag material is filled with the backfilling material to fill the structure. A closed space is formed between the earth retaining material at both ends and the ground,
The closed space is filled with a backfill material.
Further, the seventh invention of the present application is a method for constructing a shaft by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft, and constitutes both ends of the structure. The backfilling bag material according to any one of the first to fifth inventions is attached to the earth retaining material, and the flange of the reinforcing ring made of shaped steel is provided below the earth retaining material. The backfilling material is filled with the backfilling bag material in a state where the end portions of the shape-retaining material are in contact with each other.
Further, the eighth invention of the present application is a method for constructing a shaft by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft, and constitutes both ends of the structure. The backfilling bag material according to the fifth invention is attached to the earth retaining material, and the flange of the reinforcing ring made of shaped steel provided below the earth retaining material is on the front side of the bifurcated portion. The backfilling material is filled in the backfilling bag material with the branching end located on the web side of the reinforcing ring and the branching end on the back side of the bifurcated portion located between the reinforcing ring and the ground. It is characterized by that.
本発明によれば、以下に記載する効果のうち、少なくとも何れか１つの効果を奏する。
（１）袋本体の縦方向側の伸度を、前記袋本体の横方向側の伸度よりも大きくすることで、裏込め材の充填に伴う、袋本体の縦方向や前後方向への膨張を促し、土留材を構成する波形鋼板の隙間や、注入口に対し鉛直方向上部側の空間等に、裏込め材を密に充填することができる。
（２）袋本体の横方向側の伸度を小さくすることで、袋本体の横方向側の膨張を一定の範囲に制限し、土留材の横方向の未連結側端部から、袋本体がはみ出すことを防止できる。
（３）袋本体の内部に形状保持材を配置することで、袋本体の縦方向側の膨張を制限することで、裏込め材の充填に伴う袋本体の膨張を、特に前後方向側への膨張に絞って促すことができる。
（４）形状保持材をシート状物で構成し、シート状物の両側縁と袋本体との間を開放しておくことで、シート状物の裏側へ裏込め材を回り込ませることができ、形状保持材の裏側の空間に対する裏込め材の充填性が向上する。
（５）形状保持材を構成するシート状物の前背面を連通させる連通部を設けることで、当該連通部を経由した、形状保持材背面側への裏込め材の流入を促し、形状保持材の裏側への裏込め材の充填性が向上する。
（６）袋本体に二叉部を設けることで、当該二叉部を構成するそれぞれの分岐端が、土留材間に配置した補強リング周辺の狭小空間に入り込みやすくなり、裏込め材の充填性が向上する。
（７）周方向に連結する複数の土留材からなる構造物の両側端の土留材に、裏込め用袋材を設置して閉塞空間を形成することで、その他の土留材間に裏込め用袋材を配置することなく、密に裏込め材を充填することができる。
According to the present invention, at least one of the effects described below is exhibited.
(1) By making the elongation of the bag body in the vertical direction larger than the elongation of the bag body in the horizontal direction, the bag body expands in the vertical direction and the front-rear direction due to the filling of the backfill material. It is possible to densely fill the gaps between the corrugated steel plates constituting the earth retaining material and the space on the upper side in the vertical direction with respect to the injection port.
(2) By reducing the elongation on the lateral side of the bag body, the expansion of the bag body on the lateral side is limited to a certain range, and the bag body can be pulled from the laterally unconnected end of the retaining material. It can be prevented from sticking out.
(3) By arranging the shape-retaining material inside the bag body, the expansion of the bag body in the vertical direction is restricted, so that the expansion of the bag body due to the filling of the backfill material is particularly extended to the front-rear direction side. It can be promoted by focusing on expansion.
(4) By forming the shape-retaining material with a sheet-like material and opening the space between both side edges of the sheet-like material and the bag body, the backfill material can be wrapped around the back side of the sheet-like material. The filling property of the backfill material with respect to the space on the back side of the shape-retaining material is improved.
(5) By providing a communication portion for communicating the front and back surfaces of the sheet-like material constituting the shape-retaining material, the backfilling material is promoted to flow into the back surface side of the shape-retaining material via the communication portion, and the shape-retaining material is provided. Improves the filling property of the backfill material on the back side of the.
(6) By providing the bifurcated portion in the bag body, each branch end constituting the bifurcated portion can easily enter the narrow space around the reinforcing ring arranged between the retaining materials, and the filling property of the backfill material can be easily filled. Is improved.
(7) For backfilling between other earth retaining materials by installing a backfill bag material on the earth retaining materials at both ends of a structure composed of a plurality of earth retaining materials connected in the circumferential direction to form a closed space. The backfill material can be densely filled without arranging the bag material.
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。 Hereinafter, examples of the present invention will be described with reference to the drawings.
＜１＞全体構成
図１に、本発明に係る裏込め用袋材Ａ（以下、単に「袋材Ａ」ともいう。）の全体構成を示す。
本発明に係る袋材Ａは、土留材を、軸方向Ｘおよび周方向Ｙに複数連結して構造物を構成する際に、土留材の背面に取り付ける袋本体１０を少なくとも有する部材である。
この袋本体１０の内部に裏込め材を充填することで、袋本体１０を膨張させ、土留材と地山との間の隙間を、膨張させた袋本体１０の内部に充填された裏込め材で満たすことによって、土留材と地山との一体化を図る。
<1> Overall configuration FIG. 1 shows the overall configuration of the backfill bag material A (hereinafter, also simply referred to as “bag material A”) according to the present invention.
The bag material A according to the present invention is a member having at least a bag body 10 attached to the back surface of the earth retaining material when a plurality of earth retaining materials are connected in the axial direction X and the circumferential direction Y to form a structure.
By filling the inside of the bag body 10 with a backfill material, the bag body 10 is expanded, and the gap between the earth retaining material and the ground is filled with the backfill material filled inside the expanded bag body 10. By filling with, the earth retaining material and the ground are integrated.
＜１．１＞土留材
土留材は、地山の表面近傍に複数連結して、地山の土留機能を発揮する構造物を構成するための部材である。
土留材には、種々の形状の製品を用いることができ、具体的には、波形鋼板の周囲に連結用のフランジとなるフレームを接合してなるライナープレートやＪプランクプレート、その他立坑やトンネルの土留材として使用可能な公知の部材を用いることができる。
なお、前記した波形鋼板の波形状は、正弦波形状、矩形波形状、三角波形状、台形波形状、またはこれらの組合せに係る形状など、種々の形状が含まれる。
本実施例では、土留材として、略正弦波形状を呈する波形鋼板Ｂ１の周囲に、連結用のフランジとなるフレームＢ２を接合してなる、ライナープレートＢを用いている。
以下、各構成要素の詳細について説明する。
<1.1> Retaining material A retaining material is a member for forming a structure that exerts the retaining function of the ground by connecting a plurality of the retaining materials in the vicinity of the surface of the ground.
Products of various shapes can be used as the earth retaining material. Specifically, liner plates, J-plank plates, and other shafts and tunnels made by joining a frame that serves as a flange for connection around a corrugated steel plate. A known member that can be used as a retaining material can be used.
The wave shape of the corrugated steel sheet described above includes various shapes such as a sine wave shape, a square wave shape, a triangular wave shape, a trapezoidal wave shape, or a shape related to a combination thereof.
In this embodiment, a liner plate B is used as the earth retaining material, which is formed by joining a frame B2 serving as a flange for connection around a corrugated steel plate B1 having a substantially sinusoidal shape.
The details of each component will be described below.
＜２＞袋本体
袋本体１０は、裏込め材を内部に充填するための部材である。
袋本体１０の前面側には、袋内部と連通する筒状の注入口２０を設けており、この注入口２０を波形鋼板Ｂ１に設けた挿通孔Ｂ１１に挿通して、ライナープレートＢの前面に露出させた注入口２０から裏込め材を注入し、袋本体１０の内部に裏込め材を充填させて使用する。
<2> Bag body The bag body 10 is a member for filling the inside of the backfill material.
A tubular injection port 20 communicating with the inside of the bag is provided on the front side of the bag body 10, and the injection port 20 is inserted into the insertion hole B11 provided in the corrugated steel plate B1 to the front surface of the liner plate B. The backfill material is injected from the exposed injection port 20, and the backfill material is filled inside the bag body 10 for use.
＜３＞袋本体の形状
袋本体１０の形状は、特段限定せず、使用する土留材の形状に応じて適宜設計すればよい。
本実施例では、袋本体１０の形状を、矩形状の土留材と略同等、若しくはやや小さく構成した形状とし、生地の周囲の一部または全部を、縫合や接着などの公知の方法を用いて袋形状としている。
<3> Shape of the bag body The shape of the bag body 10 is not particularly limited, and may be appropriately designed according to the shape of the earth retaining material to be used.
In this embodiment, the shape of the bag body 10 is formed to be substantially the same as or slightly smaller than the rectangular earth retaining material, and a part or all of the periphery of the fabric is sewn or adhered by a known method. It has a bag shape.
＜４＞生地の素材
袋本体１０を構成する生地の素材は、不織布、織布など、可撓性や伸縮性を有する素材を用いることができる。
<4> Material of fabric As the material of the fabric constituting the bag body 10, a material having flexibility and elasticity such as a non-woven fabric and a woven fabric can be used.
＜５＞生地の伸度
袋本体１０を構成する生地の伸度は、袋本体１０の縦方向を構造物の軸方向Ｘとし、かつ袋本体１０の横方向を構造物の周方向Ｙと定義したときに、前記袋本体１０を構成する生地の縦方向側の伸度が、前記生地の横方向側の伸度よりも大きくなるよう構成する。
これは、袋本体１０に裏込め材Ｃを充填した際に、袋本体１０の膨張方向を制御するためである。
<5> Elongation of dough The elongation of the dough constituting the bag body 10 is defined as the vertical direction of the bag body 10 as the axial direction X of the structure and the lateral direction of the bag body 10 as the circumferential direction Y of the structure. When this is done, the elongation on the vertical side of the dough constituting the bag body 10 is configured to be larger than the elongation on the horizontal side of the dough.
This is to control the expansion direction of the bag body 10 when the bag body 10 is filled with the backfill material C.
なお、袋本体１０に使用する生地は横方向側に伸びない態様とすることが好ましい。この「伸びない態様」とは、生地の伸度が０％であることのみを示すものではなく、例えば３０％以下を意図するものである。
本実施例では、袋本体１０に使用する生地の縦方向側の伸度を５０％以上とし、横方向側の伸度を３０％以下としている。
It is preferable that the fabric used for the bag body 10 does not extend laterally. This "non-stretchable mode" does not only indicate that the elongation of the dough is 0%, but is intended to be, for example, 30% or less.
In this embodiment, the elongation of the fabric used for the bag body 10 in the vertical direction is 50% or more, and the elongation in the horizontal direction is 30% or less.
＜６＞その他の構成
袋材Ａには、土留材に対し、袋材Ａを正しい位置で設置するための位置決め部３０を設けても良い。
位置決め部３０は、袋本体１０の周囲から張り出すように設けた帯状部材で構成することができ、この帯状部材を土留材の周面に沿わせて固定すること等によって、ライナープレートＢに対し所定の位置に袋本体１０をセットすることができる。
本実施例では、袋本体１０の上縁に位置決め部３０を設けており、この位置決め部３０を、ライナープレートＢの上部のフレームＢ２の背面側の縁部と、前面側の縁部とで折曲して鉤状に構成することで、当該フレームＢ２に袋本体１０を係止して位置決めした態様としている。
なお、本実施例では、ライナープレートＢのフレームＢ２に、隣り合う別体のライナープレートＢとの結合に用いる連結孔Ｂ２１が設けてあるため、予め位置決め部３０に、連結孔Ｂ２１の位置に対応する取付孔３１を設けておくか、現場設置時に、連結孔Ｂ２１に重なる箇所を穿孔して取付孔３１を形成してもよい。
<6> Other configurations The bag material A may be provided with a positioning portion 30 for installing the bag material A at a correct position with respect to the earth retaining material.
The positioning portion 30 can be formed of a strip-shaped member provided so as to project from the periphery of the bag main body 10, and by fixing the strip-shaped member along the peripheral surface of the earth retaining material or the like, the positioning portion 30 is attached to the liner plate B. The bag body 10 can be set at a predetermined position.
In this embodiment, a positioning portion 30 is provided on the upper edge of the bag body 10, and the positioning portion 30 is folded between the back edge portion of the frame B2 on the upper portion of the liner plate B and the front edge portion. By bending and forming a hook shape, the bag body 10 is locked to the frame B2 and positioned.
In this embodiment, since the frame B2 of the liner plate B is provided with the connecting hole B21 used for connecting to the adjacent separate liner plate B, the positioning portion 30 corresponds to the position of the connecting hole B21 in advance. The mounting hole 31 may be provided, or the mounting hole 31 may be formed by drilling a portion overlapping the connecting hole B21 at the time of on-site installation.
＜７＞使用例１（図２，図３）
図２，３を参照しながら、本発明に係る袋材の使用例について説明する。
<7> Usage example 1 (Figs. 2 and 3)
An example of using the bag material according to the present invention will be described with reference to FIGS. 2 and 3.
（１）ライナープレートへの設置〜充填作業の初期段階（図２（ａ））
まず、袋材Ａを、ライナープレートＢの背面に取り付ける。
このとき、袋材Ａの上縁に設けた位置決め部３０をライナープレートＢのフレームＢ２上部に沿わせるように折曲させ、上下に隣接するライナープレートＢの連結機構を流用して取り付けることができる。
注入口２０は、ライナープレートＢの前背面を貫通させて設けてある挿通孔Ｂ１１に差し込んで、ライナープレートＢの前面側に露出させておく。
この状態で注入口２０から裏込め材Ｃの注入を開始すると、裏込め材Ｃは袋材Ａの下部から徐々に充填されていく。
(1) Installation on liner plate-Initial stage of filling work (Fig. 2 (a))
First, the bag material A is attached to the back surface of the liner plate B.
At this time, the positioning portion 30 provided on the upper edge of the bag material A can be bent so as to be along the upper portion of the frame B2 of the liner plate B, and the connecting mechanism of the liner plates B adjacent to the top and bottom can be diverted and attached. ..
The injection port 20 is inserted into an insertion hole B11 provided so as to penetrate the front and back surfaces of the liner plate B, and is exposed on the front surface side of the liner plate B.
When the injection of the backfill material C is started from the injection port 20 in this state, the backfill material C is gradually filled from the lower part of the bag material A.
（２）縦方向への伸展促進（図２（ｂ））
裏込め材Ｃの注入が進んでいくにつれ、袋材Ａは裏込め材Ｃの注入圧によって生地がもつ伸縮性に従って伸び、膨らみ始める。
このとき、本発明に係る袋材Ａは、取り付け状態において、縦方向（ライナープレートＢの軸方向、図２における紙面上下方向に相当。）の伸度は、横方向（ライナープレートＢの周方向、図２における紙面奥行き方向）の伸度よりも大きく構成してあるため、袋材Ａは、縦方向の伸びに応じて、図２（ｂ）に示すように、紙面上下方向および紙面左右方向に膨らんでいく。
その結果、注入口２０よりも上部の空間に対しても、袋材Ａの伸展および膨張に伴って裏込め材Ｃが充填されることとなる。
(2) Promotion of extension in the vertical direction (Fig. 2 (b))
As the injection of the backfill material C progresses, the bag material A expands according to the elasticity of the fabric due to the injection pressure of the backfill material C and begins to swell.
At this time, in the attached state, the bag material A according to the present invention has an elongation in the vertical direction (corresponding to the axial direction of the liner plate B and the vertical direction of the paper surface in FIG. 2) in the horizontal direction (circumferential direction of the liner plate B). Since the bag material A is configured to be larger than the elongation in the depth direction of the paper surface in FIG. 2, the bag material A is formed in the vertical direction of the paper surface and the left-right direction of the paper surface as shown in FIG. 2 (b) according to the elongation in the vertical direction. It swells up.
As a result, the backfill material C is also filled in the space above the injection port 20 as the bag material A expands and expands.
（３）横方向への伸展抑制（図３）
一方、本発明に係る袋材Ａの横方向（ライナープレートＢの周方向、図２における紙面奥行き方向に相当。）の伸度は小さく構成してあるため、袋材Ａは、横方向には伸びず、充填前の袋材Ａの横長から大きく変化することはない。
そのため、図３に示すように、裏込め材Ｃの注入後に、袋材Ａの側端がライナープレートＢの側端からはみ出さず、袋材Ａの側端位置がライナープレートＢの背面内に収まるため、ライナープレートＢの周方向に連結する別体のライナープレートＢの連結を妨げることがない。
したがって、作業時間の制約などから、一周分のライナープレートＢの連結作業を一度に完成できない場合であっても作業の再開に支障が生じにくい。
したがって、本発明に係る袋材Ａは、終電と始発の間に作業を行う必要がある、鉄道での立坑構築工事などに特に好適である。
(3) Suppression of lateral extension (Fig. 3)
On the other hand, since the bag material A according to the present invention has a small elongation in the lateral direction (corresponding to the circumferential direction of the liner plate B and the depth direction of the paper surface in FIG. 2), the bag material A is configured to be small in the lateral direction. It does not stretch and does not change significantly from the horizontally long bag material A before filling.
Therefore, as shown in FIG. 3, after the backfill material C is injected, the side end of the bag material A does not protrude from the side end of the liner plate B, and the side end position of the bag material A is inside the back surface of the liner plate B. Since it fits, it does not interfere with the connection of the separate liner plate B connected in the circumferential direction of the liner plate B.
Therefore, even if the connection work of the liner plate B for one round cannot be completed at one time due to restrictions on the work time, it is unlikely that the work will be hindered from restarting.
Therefore, the bag material A according to the present invention is particularly suitable for shaft construction work on a railway, where work needs to be performed between the last train and the first train.
＜８＞使用例２（図４）
本発明に係る袋材Ａは、構造物を構成する土留材の全てについての設置を要するものに限らない。
例えば、図４に示すように、地山Ｄの内周側に設ける構造物を構成する複数のライナープレートＢのうち、側端を構成するライナープレートＢに袋材Ａを取り付けておき、この袋材Ａに裏込め材Ｃを充填して、構造物の両側端のライナープレートＢと地山Ｄとの間に閉塞空間を形成し、この閉塞空間に裏込め材Ｃを充填して構造物と地山Ｄとの間を裏込め材Ｃで一体化することもできる。
<8> Usage example 2 (Fig. 4)
The bag material A according to the present invention is not limited to the one that requires installation of all the earth retaining materials constituting the structure.
For example, as shown in FIG. 4, of a plurality of liner plates B constituting a structure provided on the inner peripheral side of the ground D, a bag material A is attached to the liner plate B constituting the side end, and this bag is provided. The material A is filled with the backfill material C to form a closed space between the liner plates B at both ends of the structure and the ground D, and the closed space is filled with the backfill material C to form the structure. It is also possible to integrate the space with the ground D with the backfill material C.
＜１＞形状保持材の配置（図５（ａ））
図５に、実施例２に係る裏込め用袋材の概略図を示す。
本発明に係る袋材Ａは、袋本体１０の内部に形状保持材４０を設けることもできる。
形状保持材４０の形状は特段限定せず、棒状部材や板状部材などを採用することができる。また、形状保持材４０の素材は、離隔距離の保持機能の観点から、弾性や伸縮性を有しない素材が望ましい。
本実施例では、形状保持材４０を矩形状のシート体で構成しており、当該シート体の大きさを、充填前の袋材Ａの平面形状の大きさとほぼ同じに構成している。
そして、形状保持材４０の上縁および下縁を袋材Ａに接合し、形状保持材４０の両側縁は袋材Ａと接合せずに開放した状態としている。
<1> Arrangement of shape-retaining material (Fig. 5 (a))
FIG. 5 shows a schematic view of the backfill bag material according to the second embodiment.
In the bag material A according to the present invention, the shape-retaining material 40 may be provided inside the bag body 10.
The shape of the shape-retaining material 40 is not particularly limited, and a rod-shaped member, a plate-shaped member, or the like can be adopted. Further, the material of the shape-retaining material 40 is preferably a material having no elasticity or elasticity from the viewpoint of the function of maintaining the separation distance.
In this embodiment, the shape-retaining material 40 is composed of a rectangular sheet body, and the size of the sheet body is substantially the same as the size of the planar shape of the bag material A before filling.
Then, the upper edge and the lower edge of the shape-retaining material 40 are joined to the bag material A, and both side edges of the shape-retaining material 40 are left open without being joined to the bag material A.
＜２＞使用イメージ（図５（ｂ））
本実施例に係る袋材Ａによれば、裏込め材Ｃの注入に伴い、袋本体１０は縦方向に伸展して紙面上下方向に膨らもうとするものの、形状保持材４０によって紙面上下方向への膨らみが抑制され、紙面左右方向に膨らむことになる。その結果、袋本体１０はライナープレートＢの背面と地山Ｄ表面を押しつけるように膨らみ、両者の間の隙間を埋めるように作用する。
また、形状保持材４０の両側縁が袋本体１０と接合せずに開放してあることから、注入口２０から充填される裏込め材Ｃがこの開放部分から形状保持材４０の背面にも回り込むため、袋本体１０の内部の充填空間に均一に裏込め材Ｃを充填するにあたって、形状保持材４０が障害になることもない。
<2> Image of use (Fig. 5 (b))
According to the bag material A according to the present embodiment, with the injection of the backfill material C, the bag body 10 extends in the vertical direction and tries to expand in the vertical direction of the paper surface, but the shape-retaining material 40 causes the vertical direction of the paper surface. The swelling to the side is suppressed, and the swelling occurs in the left-right direction of the paper surface. As a result, the bag body 10 swells so as to press the back surface of the liner plate B and the surface of the ground D, and acts to fill the gap between the two.
Further, since both side edges of the shape-retaining material 40 are opened without being joined to the bag body 10, the backfill material C filled from the injection port 20 wraps around the back surface of the shape-retaining material 40 from this open portion. Therefore, the shape-retaining material 40 does not hinder the uniform filling of the backfill material C in the filling space inside the bag body 10.
＜１＞連通部の形成（図６）
図６に、実施例３に係る裏込め用袋材の概略図を示す。
本実施例に係る袋材Ａは、実施例２で示した形状保持材４０の表面にスリットを設けた構成である。
充填した裏込め材Ｃをこのスリットから流入させることで形状保持材４０の背面側への裏込め材Ｃの充填性を高めることができる。
<1> Formation of communication part (Fig. 6)
FIG. 6 shows a schematic view of the backfill bag material according to the third embodiment.
The bag material A according to the present embodiment has a configuration in which a slit is provided on the surface of the shape-retaining material 40 shown in the second embodiment.
By flowing the filled backfilling material C through this slit, the filling property of the backfilling material C on the back surface side of the shape-retaining material 40 can be improved.
＜１＞二叉部の形成（図７）
図７に、実施例４に係る裏込め用袋材の概略図を示す。
本実施例に係る袋材Ａは、実施例２で示す形状保持材４０を設けつつ、袋本体１０の縦方向下部側において、前記した形状保持材４０を挟んで、前記袋本体１０を前後方向に分岐した二叉部５０を形成している。
形状保持材４０の上縁は、袋本体１０の上部と接合し、形状保持材４０の下縁は袋本体１０の下部側に設けた二叉部５０の根本部分と接合している。
形状保持材４０の両側縁は、袋本体１０と接合せずに開放した状態とする。
また、形状保持材４０の表面には、実施例３に示す連通部４４を形成しておいても良い。
<1> Formation of bifurcation (Fig. 7)
FIG. 7 shows a schematic view of the backfill bag material according to the fourth embodiment.
The bag material A according to the present embodiment is provided with the shape-retaining material 40 shown in the second embodiment, and the bag body 10 is placed in the front-rear direction with the shape-retaining material 40 sandwiched on the lower side in the vertical direction of the bag body 10. A bifurcated portion 50 is formed.
The upper edge of the shape-retaining material 40 is joined to the upper part of the bag body 10, and the lower edge of the shape-retaining material 40 is joined to the root portion of the bifurcated portion 50 provided on the lower side of the bag body 10.
Both side edges of the shape-retaining material 40 are left open without being joined to the bag body 10.
Further, the communication portion 44 shown in the third embodiment may be formed on the surface of the shape-retaining material 40.
なお、本発明に係る袋材Ａにおいて、前記二叉部５０を設けるにあたって、前記形状保持材４０の構成は必須ではない。例えば袋本体１０の生地の縫製位置を調整するなどの方法によって、予め二叉部５０を備えた袋材Ａとすることができる。 In the bag material A according to the present invention, the configuration of the shape-retaining material 40 is not essential when the bifurcated portion 50 is provided. For example, the bag material A provided with the bifurcated portion 50 in advance can be obtained by adjusting the sewing position of the fabric of the bag body 10.
＜２＞使用イメージ（図８）
図８に、二叉部５０を設けた裏込め用袋材の使用イメージを示す。
本実施例では、土留材であるライナープレートＢからなる構造物において、ライナープレートＢの縦方向に隣接するライナープレートＢ間に断面Ｈ形状の補強リングＥを介在させている。
この補強リングＥを構成する地山Ｄ側のフランジＥ１に、形状保持材４０の下縁を当接させることで、袋本体１０の二叉部５０の前面側の分岐端５１が補強リングＥのウェブ内に位置し、二叉部５０の背面側の分岐端５１が補強リングＥと地山Ｄとの間に位置することとなる。
この状態で裏込め材Ｃの充填を行うと、ライナープレートＢと補強リングＥとの間の隙間と、補強リングＥと地山Ｄとの間の隙間の両方に、裏込め材Ｃが確実に充填され、地山Ｄ、土留材および補強リングＥとの間を強固に一体化することができる。
<2> Image of use (Fig. 8)
FIG. 8 shows an image of using a backfill bag material provided with a bifurcated portion 50.
In this embodiment, in a structure made of a liner plate B which is an earth retaining material, a reinforcing ring E having an H-shaped cross section is interposed between liner plates B vertically adjacent to the liner plate B.
By bringing the lower edge of the shape-retaining member 40 into contact with the flange E1 on the ground D side constituting the reinforcing ring E, the branch end 51 on the front surface side of the bifurcated portion 50 of the bag body 10 becomes the reinforcing ring E. It is located in the web, and the branch end 51 on the back side of the bifurcated portion 50 is located between the reinforcing ring E and the ground D.
When the backfill material C is filled in this state, the backfill material C is surely filled in both the gap between the liner plate B and the reinforcing ring E and the gap between the reinforcing ring E and the ground D. It is filled and can be firmly integrated between the ground D, the retaining material and the reinforcing ring E.
Ａ：裏込め用袋材（袋材）
１０：袋本体
２０：注入口
３０：位置決め部
３１：取付孔
４０：形状保持材
４１：上縁
４２：下縁
４３：側縁
４４：連通部
５０：二叉部
５１：分岐端
Ｂ：ライナープレート（土留材）
Ｂ１：波形鋼板
Ｂ１１：挿通孔
Ｂ２：フレーム
Ｂ２１：連結孔
Ｃ：裏込め材
Ｄ：地山
Ｅ：補強リング
Ｅ１：フランジ
A: Bag material for backfilling (bag material)
10: Bag body 20: Injection port 30: Positioning part 31: Mounting hole 40: Shape-retaining material 41: Upper edge 42: Lower edge 43: Side edge 44: Communication part 50: Bifurcated part 51: Branch end B: Liner plate (Soil retaining material)
B1: Corrugated steel plate B11: Insertion hole B2: Frame B21: Connecting hole C: Backfill material D: Ground E: Reinforcing ring E1: Flange
Claims (8)
裏込め材を充填可能な注入口を設けた、袋本体と、
前記袋本体の内部に配置する、形状保持材と、を少なくとも有し、
前記袋本体の縦方向を前記構造物の軸方向とし、かつ前記袋本体の横方向を前記構造物の周方向としたときに、
前記袋本体の縦方向側の伸度を、前記袋本体の横方向側の伸度よりも大きく構成し、
前記形状保持材が、前記袋本体の縦方向に離隔した箇所間の距離を保持するように前記袋本体に取り付けてあることを特徴とする、
裏込め用袋材。 A backfill bag material that is attached to the back surface of the earth retaining material when a plurality of earth retaining materials are connected in the axial direction and the circumferential direction to form a structure.
A bag body with an injection port that can be filled with backfill material,
At least having a shape-retaining material to be arranged inside the bag body,
When the vertical direction of the bag body is the axial direction of the structure and the horizontal direction of the bag body is the circumferential direction of the structure,
The elongation on the vertical side of the bag body is configured to be larger than the elongation on the horizontal side of the bag body.
The shape-retaining material is attached to the bag body so as to maintain a distance between the vertically separated portions of the bag body.
Bag material for backfilling.
前記シート状物の上縁と下縁を袋本体に固定してあり、
前記シート状物の両側縁と、前記袋本体との間を開放してあることを特徴とする、
請求項１に記載の裏込め用袋材。 The shape-retaining material is made of a sheet-like material.
The upper and lower edges of the sheet-like material are fixed to the bag body.
It is characterized in that the space between both side edges of the sheet-like object and the bag body is open.
The bag material for backfilling according to claim 1.
請求項２に記載の裏込め用袋材。 The sheet-like object is characterized in that a communication portion for communicating the front and back surfaces of the sheet-like object is formed.
The bag material for backfilling according to claim 2.
請求項１乃至３のうち何れか１項に記載の裏込め用袋材。 The fabric constituting the bag body has an elongation of 50% or more in the vertical direction and an elongation of 30% or less in the horizontal direction.
The bag material for backfilling according to any one of claims 1 to 3.
請求項１乃至４のうち何れか１項に記載の裏込め用袋材。 The bag body is provided with a bifurcated portion branched in the front-rear direction of the bag body.
The bag material for backfilling according to any one of claims 1 to 4.
前記構造物の両端を構成する土留材に、請求項１乃至５のうち何れか１項に記載の裏込め用袋材を取り付けておき、
前記裏込め用袋材に裏込め材を充填して、前記構造物の両側端の土留材と地山との間に閉塞空間を形成し、
前記閉塞空間に裏込め材を充填することを特徴とする、
立坑の構築方法。 It is a method of constructing a shaft, which is a method of constructing a structure by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft.
The backfill bag material according to any one of claims 1 to 5 is attached to the earth retaining material constituting both ends of the structure.
The backfilling bag material is filled with the backfilling material to form a closed space between the earth retaining material at both ends of the structure and the ground.
The closed space is filled with a backfill material.
How to build a shaft.
前記構造物の両端を構成する土留材に、請求項１乃至５のうち何れか１項に記載の裏込め用袋材を取り付けておき、
前記土留材の下方に設けてある、形鋼からなる補強リングのフランジに形状保持材の端部を当接させた状態で、前記裏込め用袋材に裏込め材を充填することを特徴とする、
立坑の構築方法。 It is a method of constructing a shaft, which is a method of constructing a structure by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft.
The backfill bag material according to any one of claims 1 to 5 is attached to the earth retaining material constituting both ends of the structure.
The backfilling material is filled in the backfilling bag material in a state where the end of the shape-retaining material is in contact with the flange of the reinforcing ring made of shaped steel provided below the earth retaining material. To do
How to build a shaft.
前記構造物の両端を構成する土留材に、請求項５に記載の裏込め用袋材を取り付けておき、
前記土留材の下方に設けてある、形鋼からなる補強リングのフランジに対し、前記二叉部の前面側の分岐端が補強リングのウェブ側に位置し、二叉部の背面側の分岐端が前記補強リングと地山との間に位置した状態で、前記裏込め用袋材に裏込め材を充填することを特徴とする、
立坑の構築方法。 It is a method of constructing a shaft, which is a method of constructing a structure by connecting a plurality of earth retaining materials in the axial direction and the circumferential direction inside the shaft.
The backfill bag material according to claim 5 is attached to the earth retaining material constituting both ends of the structure.
With respect to the flange of the reinforcing ring made of shaped steel provided below the retaining material, the branch end on the front side of the bifurcated portion is located on the web side of the reinforcing ring, and the bifurcated end on the back side of the bifurcated portion. Is located between the reinforcing ring and the ground, and the backfilling bag material is filled with the backfilling material.
How to build a shaft.
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| JPH08338196A (en) * | 1995-06-12 | 1996-12-24 | Kajima Corp | Filling method for backfill material and members for preventing ground collapse and water sealing |
| JP3711171B2 (en) * | 1996-04-18 | 2005-10-26 | Ｊｆｅ建材株式会社 | Tunnel segment backfilling material injection bag body and tunnel segment backfill method |
| JP2001012198A (en) * | 1999-06-30 | 2001-01-16 | Ashimori Ind Co Ltd | Bag body for filling back-filling material for timbering and its fitting method to timbering |
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