JP4490859B2

JP4490859B2 - Civil engineering bag

Info

Publication number: JP4490859B2
Application number: JP2005100722A
Authority: JP
Inventors: 和孝 ▲からさき▼; 順一後藤
Original assignee: Ashimori Industry Co Ltd
Current assignee: Ashimori Industry Co Ltd
Priority date: 2005-03-31
Filing date: 2005-03-31
Publication date: 2010-06-30
Anticipated expiration: 2025-03-31
Also published as: JP2006283281A

Description

本発明は、その内部にモルタル等の注入材を注入して膨張させて使用する土木用袋体であって、特に、コンパクトに折り畳むことが容易で、且つ、膨張性が高い土木用袋体に関する。 The present invention relates to a civil engineering bag body that is used by injecting and inflating an injection material such as mortar therein, and particularly relates to a civil engineering bag body that is easy to fold in a compact manner and has high expansibility. .

トンネルなどの空洞部を掘削する際には、地山の緩みや掘削面の崩壊を防止するために、Ｈ型鋼材などを円弧状に曲げた支保工を掘削面に沿って設置することが多い。しかし、この支保工と掘削面との間には必ず隙間が生じることから、この隙間に袋体を間詰めしてから、袋体内にグラウト等の注入材を注入して、袋体を地山に密着させた状態で注入材を固化させる工法がある。このような工法はプレロードシェル工法（例えば、特許文献１参照）と呼ばれ、地山にプレロード（予荷重）をかけることにより地山の沈下抑制を行っている。 When excavating a hollow part such as a tunnel, in order to prevent loose ground and collapse of the excavation surface, a support work in which an H-shaped steel material is bent in an arc shape is often installed along the excavation surface. . However, there is always a gap between the support and the excavation surface, so the bag body is filled in this gap, and then an injection material such as grout is injected into the bag body, and the bag body is ground. There is a method of solidifying the injection material in a state of being in close contact with the material. Such a construction method is called a preload shell construction method (see, for example, Patent Document 1), and suppresses settlement of the natural ground by applying a preload (preload) to the natural ground.

また、めがねトンネルの施工においては、まず、左右に隣り合う本坑位置の中間位置に中央導坑を掘削形成し、次に、めがねトンネルの中心となる中壁コンクリートを作り、その上に本坑の支保工を建て込みながら本坑の掘削を行うという手順で施工が行われる（例えば、特許文献２参照）。この支保工を設置するためには、中壁コンクリート上面と掘削面との間に、大きな隙間がトンネル長さ方向に沿って必要となる。そこで、この隙間に袋体を連続的に並べて間詰めを行い、支保工を設置した後に袋体内にグラウト等の注入材を注入することで、地山の沈下抑制を図っている。 In the construction of eyeglass tunnels, first, a central shaft is excavated and formed at an intermediate position between the main shafts adjacent to the left and right, and then the inner wall concrete that becomes the center of the eyeglass tunnel is made, and the main shaft is formed on it. Construction is carried out in the procedure of excavating the main mine while building the support work (for example, see Patent Document 2). In order to install this support, a large gap is required along the tunnel length direction between the upper surface of the middle wall concrete and the excavation surface. Therefore, the bag body is continuously arranged in the gap, the space is filled, and an injecting material such as grout is injected into the bag body after the support is installed, thereby suppressing settlement of the natural ground.

上記のような隙間を間詰めするための袋体としては、膨張したときに、掘削面と、支保工や中壁コンクリートとの間の大きな隙間を確実に埋めることができる膨張性の高い袋体である必要があるが、例えば、特許文献２に記載されているような、筒状袋体の両端部が閉塞されて、内部に膨張可能な空間が形成された二重筒の土木用袋体が用いられている。 Highly inflatable bags that can reliably fill large gaps between the excavation surface and the support and middle wall concrete when inflated as bags for filling the gaps as described above For example, as described in Patent Document 2, a double-cylinder civil engineering bag body in which both ends of the cylindrical bag body are closed and an inflatable space is formed inside Is used.

特公平２−５２３７号公報Japanese Patent Publication No.2-5237 特開２００４−７６５６８号公報JP 2004-76568 A

しかし、前記特許文献２に記載の袋体は、膨張させる前の状態での嵩がかなり高いために運搬しづらく、前述のような隙間へ設置する際の作業性も十分とは言えない。また、寸法が大きくなると注入材の注入圧力に耐えるためにより高い強度が必要となる。 However, the bag described in Patent Document 2 has a very high volume before being inflated, so that it is difficult to carry and the workability when installed in the gap as described above is not sufficient. Also, as the dimensions increase, higher strength is required to withstand the injection pressure of the injection material.

本発明では、寸法が大きくてもコンパクトに折り畳むことが可能で取り扱いが容易であり、且つ、高い耐圧力を有する袋体を提供することを目的とする。 An object of the present invention is to provide a bag body that can be folded compactly even if the size is large, is easy to handle, and has a high pressure resistance.

Means for Solving the Problems and Effects of the Invention

第１の発明の土木用袋体は、その両端部にそれぞれ形成された２つの小径部と、これら２つの小径部の間に形成された複数の大径部と、これら複数の大径部よりも小径で、且つ、前記複数の大径部を連結する連結部とを有する異径筒状織物を備え、前記異径筒状織物は、筒長方向内側に折り返された状態で重なり合う両端部の２つの小径部が接続されて、内側の折り返し部と外側の表面部との間に環状空間が形成され、この環状空間に、注入材を注入する為の注入口が設けられていることを特徴とするものである。 The civil engineering bag of the first invention includes two small-diameter portions respectively formed at both ends thereof, a plurality of large-diameter portions formed between the two small-diameter portions, and a plurality of large-diameter portions. Each having a small-diameter cylindrical fabric having a connecting portion that connects the plurality of large-diameter portions, and the different-diameter tubular fabric is folded at the inner side in the cylinder length direction. Two small-diameter portions are connected, an annular space is formed between the inner folded portion and the outer surface portion, and an injection port for injecting an injection material is provided in the annular space. It is what.

袋体は、異径筒状織物が内側に折り返された状態で、重なり合う両端の２つの小径部が接続されて形成された環状空間を備えており、この環状空間に注入口から注入材が注入される。このように、接続される両端部が小径であるので、接続作業を容易且つ迅速に行うことができるし、注入材を注入したときに接続部に作用する張力が小さくなり、接続部での破断が生じにくい。また、両端部が小径であることから、接続された両端から注入材が漏れにくい。さらに、袋体は、複数の大径部とこれら複数の大径部を連結する連結部とを備えた、いわゆる、蛇腹構造を有するため、袋体をコンパクトに平面状に折り畳むことができ、保管や運搬の面で有利である。 The bag body is provided with an annular space formed by connecting two small-diameter portions at opposite ends in a state in which the tubular fabric with different diameters is folded inward, and an injection material is injected into the annular space from the injection port. Is done. Thus, since both ends to be connected have a small diameter, the connection work can be performed easily and quickly, and the tension acting on the connection portion when the injection material is injected is reduced, and the connection portion is broken. Is unlikely to occur. Moreover, since both ends are small in diameter, the injected material is difficult to leak from both ends connected. Further, since the bag body has a so-called bellows structure including a plurality of large diameter portions and a connecting portion that connects the plurality of large diameter portions, the bag body can be folded into a compact and flat shape and stored. And advantageous in terms of transportation.

第２の発明の土木用袋体は、前記第１の発明において、前記異径筒状織物が、複数本の経糸とこれら複数本の経糸に対してスパイラル状に連続して織り込まれた緯糸からなる、継ぎ目のない織物であることを特徴とするものである。袋体が継ぎ目のない織物であることから、縫製部のような局部的に強度の弱い部位が存在せず、注入材をより高い注入圧で注入することができる。 The civil engineering bag according to a second aspect of the present invention is the civil engineering pouch according to the first aspect, wherein the different-diameter tubular woven fabric is a plurality of warps and a weft in which the plurality of warps are continuously woven in a spiral shape. It is characterized by being a seamless woven fabric. Since the bag body is a seamless woven fabric, there is no locally weak portion such as a sewing portion, and the injection material can be injected at a higher injection pressure.

第３の発明の土木用袋体は、前記第１又は第２の発明において、前記異径筒状織物の両端部の２つの小径部が、パイプを介して接続されていることを特徴とするものである。このように、異径筒状織物の両端部がパイプを介して接続されていることにより、袋体の中心に剛性を有する部分が存在することになり、現場で袋体を取り扱いやすくなる。 The civil engineering bag of the third invention is characterized in that, in the first or second invention, two small-diameter portions at both ends of the different-diameter tubular fabric are connected via a pipe. Is. Thus, since the both ends of the different-diameter cylindrical fabric are connected via the pipe, there is a portion having rigidity at the center of the bag body, and the bag body can be easily handled on site.

第４の発明の土木用袋体は、前記第１〜第３の何れかの発明において、前記異径筒状織物が、前記連結部において内側へ折り曲げられていることを特徴とするものである。この構成によれば、折り曲げられた部分の近傍において、折り返し部の内側に形成される通路が小さくなる。従って、環状空間内に注入材が注入されたときに、その内側の通路が塞がりやすくなるため、袋体が間詰めを行う面により確実に押しつけられ、間詰めの効果が高くなる。また、袋体を膨張させた時に、折り曲げられた部分において長さ方向に伸展しようとして折り返し部が表面部に対してずれる現象が起きるが、大径部よりも径の小さい連結部において折り曲げられていると、この折り曲げられた部分の位置がずれて連結部よりも大径の大径部を越えて伸展することはなく、小径部を接続する接続部に無理な力がかからない。 The civil engineering bag of the fourth invention is characterized in that, in any of the first to third inventions, the different-diameter tubular fabric is bent inward at the connecting portion. . According to this configuration, the passage formed inside the folded portion is small in the vicinity of the bent portion. Therefore, when the injection material is injected into the annular space, the inner passage is easily closed, and the bag body is surely pressed by the surface to be subjected to the padding, and the padding effect is enhanced. In addition, when the bag body is inflated, a phenomenon occurs in which the folded portion deviates from the surface portion in an attempt to extend in the length direction at the folded portion, but it is folded at the connecting portion having a smaller diameter than the large diameter portion. If this is the case, the position of the bent portion will not shift and extend beyond the large diameter portion larger than the connecting portion, and an unreasonable force will not be applied to the connecting portion connecting the small diameter portions.

第５の発明の土木用袋体は、前記第１〜第３の何れかの発明において、前記異径筒状織物が、前記大径部において内側へ折り曲げられていることを特徴とするものである。従って、折り曲げられた部分の近傍において、異径筒状織物の折り返し部と表面部とが略同じ幅となるため、保管の際などに袋体を折り畳みやすくなる。また、袋体の先端部（折り曲げられた部分の近傍部）の緯糸に余裕があるため、袋体に注入材が注入されたときには袋体の先端部がより膨張しやすくなり、袋体が間詰めを行う面に略均一に押しつけられる。また、袋体に局部的な力が作用しにくくなる。 The civil engineering bag of the fifth invention is characterized in that, in any of the first to third inventions, the different-diameter tubular fabric is bent inward at the large-diameter portion. is there. Accordingly, since the folded portion and the surface portion of the different-diameter tubular woven fabric have substantially the same width in the vicinity of the folded portion, the bag body can be easily folded during storage. In addition, since there is a margin in the weft at the tip of the bag (near the folded portion), when the injection material is injected into the bag, the tip of the bag is more likely to expand, and the bag It is almost uniformly pressed against the surface to be stuffed. Moreover, it becomes difficult for local force to act on the bag.

第６の発明の土木用袋体は、前記第１〜第５の何れかの発明において、前記複数の大径部は、第１大径部と、この第１大径部よりも径が小さく、且つ、前記小径部及び前記連結部よりも径の大きな第２大径部を含み、前記第２大径部が前記第１大径部内に折り返されていることを特徴とするものである。この構成では、袋体をコンパクトに折り畳むことがさらに容易になる。また、折り返し部が表面部に比べて小径になることから、環状空間内に注入材が注入されて袋体が膨張したときに、袋体に作用する長さ方向の引張力に対して、接続された異径筒状織物の両端部に作用する張力が小さくなる。 The civil engineering bag of the sixth invention is any one of the first to fifth inventions, wherein the plurality of large diameter portions are smaller in diameter than the first large diameter portion and the first large diameter portion. In addition, the second large-diameter portion includes a second large-diameter portion having a diameter larger than that of the small-diameter portion and the connecting portion, and the second large-diameter portion is folded back into the first large-diameter portion. In this configuration, it becomes easier to fold the bag body in a compact manner. In addition, since the folded portion has a smaller diameter than the surface portion, when the injection material is injected into the annular space and the bag body expands, it is connected to the tensile force in the longitudinal direction that acts on the bag body. The tension acting on both end portions of the different-diameter cylindrical fabric is reduced.

第７の発明の土木用袋体は、前記第１〜第６の何れかの発明において、前記注入口が、前記折り返し部の前記環状空間側に設けられていることを特徴とするものである。従って、注入口が、注入材の注入される袋体の内部（環状空間側）に設けられることになるため、注入材が確実に環状空間内へ注入されるし、注入材が漏れにくくなる。 The civil engineering bag of the seventh invention is characterized in that, in any one of the first to sixth inventions, the inlet is provided on the annular space side of the folded portion. . Therefore, since the injection port is provided inside the bag body into which the injection material is injected (on the annular space side), the injection material is reliably injected into the annular space, and the injection material is difficult to leak.

次に、本発明の実施の形態について以下説明する。本実施形態は、めがねトンネルの施工時の間詰め用に用いられる袋体に本発明を適用した一例である。 Next, embodiments of the present invention will be described below. The present embodiment is an example in which the present invention is applied to a bag used for filling up when building a glasses tunnel.

図１はめがねトンネル施工時におけるトンネル断面を示すものである。図１において、左右に隣り合う２つの本坑２１，２２は掘削等により形成される。ここで、これら２つの本坑２１，２２は、同時に掘削して形成するのではなく、はじめに２つの本坑２１，２２の中間位置を掘削して空洞部２３（一般的には、中央導坑と呼ばれる）を形成し、この空洞部２３に中壁コンクリート２４をトンネル長さ方向に形成する。この中壁コンクリート２４は、後に、２つの本坑２１，２２の共通した側壁となる。また、中壁コンクリート２４の上面２５と掘削面２６との間の隙間２７に後述する土木用袋体１０を載せて、並べて設置する。そして、これら土木用袋体１０内の空間に、モルタル等の注入材を加圧注入して掘削面に対してプレロードをかけることにより、地山の沈下抑制を行う。 FIG. 1 shows a cross section of a tunnel during construction of a spectacle tunnel. In FIG. 1, two main shafts 21 and 22 adjacent to the left and right are formed by excavation or the like. Here, these two main shafts 21 and 22 are not formed by excavating at the same time, but first, an intermediate position between the two main shafts 21 and 22 is excavated to form the cavity portion 23 (generally, the central shaft). The middle wall concrete 24 is formed in the cavity 23 in the tunnel length direction. The middle wall concrete 24 will later become a common side wall of the two main mines 21 and 22. Further, a civil engineering bag 10 to be described later is placed in a gap 27 between the upper surface 25 of the middle wall concrete 24 and the excavation surface 26 and installed side by side. Then, by compressing and injecting an injection material such as mortar into the space in the civil engineering bag body 10 and preloading the excavation surface, the settlement of the natural ground is suppressed.

次に、土木用袋体１０について詳細に説明する。
図２、図３に示すように、土木用袋体１０は、両端部にそれぞれ形成された２つの小径部１１ａ，１１ｂと、これら２つの小径部１１ａ，１１ｂの間に設けられた３つの大径部１１ｃ，１１ｄ，１１ｅと、これら３つの大径部１１ｃ，１１ｄ，１１ｅよりも小径で、且つ、３つの大径部１１ｃ，１１ｄ，１１ｅを連結する２つの連結部１１ｆ，１１ｇとを有する異径筒状織物１１を備えている。この異径筒状織物１１は、ポリエステル繊維等の合成繊維製の複数本の経糸とこれら複数本の経糸に対してスパイラル状に連続して織り込まれた緯糸から織成された、継ぎ目のない織物である。 Next, the civil engineering bag 10 will be described in detail.
As shown in FIGS. 2 and 3, the civil engineering bag 10 includes two small diameter portions 11a and 11b formed at both ends, and three large diameter portions 11a and 11b provided between the two small diameter portions 11a and 11b. It has diameter parts 11c, 11d, and 11e, and two connecting parts 11f and 11g that are smaller in diameter than these three large diameter parts 11c, 11d, and 11e and connect the three large diameter parts 11c, 11d, and 11e. A tubular fabric 11 having a different diameter is provided. The different-diameter cylindrical fabric 11 is a seamless fabric woven from a plurality of warps made of synthetic fibers such as polyester fibers and wefts that are continuously woven into the warps in a spiral shape. It is.

３つの大径部１１ｃ，１１ｄ，１１ｅのうち、大径部１１ｃ（第１大径部）は、異径筒状織物１１の全長の略半分の長さを有し、さらに、他の２つの大径部１１ｄ，１１ｅよりも十分大きな径を有する。一方、大径部１１ｄ，１１ｅ（第２大径部）は互いに等しい径を有する。 Of the three large-diameter portions 11c, 11d, and 11e, the large-diameter portion 11c (first large-diameter portion) has a length that is approximately half the total length of the different-diameter tubular fabric 11, and the other two It has a sufficiently larger diameter than the large diameter portions 11d and 11e. On the other hand, the large diameter portions 11d and 11e (second large diameter portions) have the same diameter.

この異径筒状織物１１から以下のようにして袋体１０が製造される。図３（ａ）に示すように、異径筒状織物１１の小径部１１ｂ側の部分（２つの大径部１１ｄ，１１ｅを含む部分）を筒長方向内側に折り返し、大径部１１ｃと大径部１１ｄとを連結する連結部１１ｆにおいて折り曲げられた状態にする。次に、両端部の２つの小径部１１ａ，１１ｂが重なり合う状態で小径部１１ａ，１１ｂを接続することにより、内側の折り返し部１１ｈと外側の表面部１１ｉとの間に、注入材８が注入される環状空間１２が形成される。このとき、図２（ｂ）に示すように、折り返し部１１ｈに含まれる２つの大径部１１ｄ，１１ｅにより、袋体１０を容易に蛇腹状に折り畳んで、袋体１０の嵩を小さくしてコンパクトにすることができるため、保管や運搬の面で有利である。尚、大径部４１ｆの数は、袋体１０の寸法、材質等により適宜変更することができる。 The bag body 10 is manufactured from the different diameter tubular fabric 11 as follows. As shown in FIG. 3 (a), the small-diameter portion 11b side portion (the portion including the two large-diameter portions 11d and 11e) of the different-diameter tubular woven fabric 11 is folded back inward in the tube length direction so as to be larger than the large-diameter portion 11c. The connecting portion 11f that connects the diameter portion 11d is bent. Next, the injection material 8 is injected between the inner folded portion 11h and the outer surface portion 11i by connecting the small diameter portions 11a and 11b in a state where the two small diameter portions 11a and 11b at both ends overlap each other. An annular space 12 is formed. At this time, as shown in FIG. 2 (b), the bag body 10 is easily folded into a bellows shape by the two large diameter portions 11d and 11e included in the folded portion 11h, thereby reducing the bulk of the bag body 10. Since it can be made compact, it is advantageous in terms of storage and transportation. The number of large-diameter portions 41f can be appropriately changed depending on the size, material, etc. of the bag body 10.

また、図３（ａ），（ｂ）に示すように、異径筒状織物１１の２つの小径部１１ａ，１１ｂの接続は、内側の小径部１１ｂ内に短い塩化ビニル製のパイプ１３を挿入してから、このパイプ１３の外周部に２つの小径部２ａ，２ｂを金属製のバンド１４で締め付けて固定することにより行う。このように、異径筒状織物１１の両端部がパイプ１３を介して接続されているため、２つの小径部２ａ，２ｂを重ね合わせて接続する作業が非常に簡単なものとなり、両端部の接続作業を迅速に行うことができる。また、袋体１０の中心に剛性を有する部分が存在することになり、現場で袋体１０を取り扱いやすくなる。 Further, as shown in FIGS. 3A and 3B, the connection between the two small diameter portions 11a and 11b of the tubular fabric 11 having a different diameter is performed by inserting a short polyvinyl chloride pipe 13 into the small diameter portion 11b on the inner side. Then, the two small diameter portions 2 a and 2 b are fastened and fixed to the outer peripheral portion of the pipe 13 with a metal band 14. Thus, since the both ends of the different-diameter cylindrical fabric 11 are connected via the pipe 13, the operation of connecting the two small-diameter portions 2a and 2b in an overlapping manner becomes very simple. Connection work can be performed quickly. Moreover, the part which has rigidity exists in the center of the bag body 10, and it becomes easy to handle the bag body 10 on the spot.

尚、図４に示すように、パイプ１３を、異径筒状織物１１の外側の小径部１１ａと内側の小径部１１ｂとの間に挿入して、内側の小径部１１ｂを外側に折り返してからバンド１４で締め付けるようにしてもよい。このようにすれば、異径筒状織物１１の両端部をより強固に接続することができる。 In addition, as shown in FIG. 4, after inserting the pipe 13 between the outer small diameter part 11a and the inner small diameter part 11b of the different diameter cylindrical fabric 11, the inner small diameter part 11b is folded outward. The band 14 may be tightened. If it does in this way, the both ends of the different diameter cylindrical fabric 11 can be connected more firmly.

折り返し部１１ｈの内側（環状空間１２側）には、注入材８を環状空間１２内に注入する為の注入口１５が設けられ、この注入口１５には、注入管１６を介してフレキシブルな注入ホース（図示省略）が接続される。尚、注入口１５の数は適宜変更可能である。 An injection port 15 for injecting the injection material 8 into the annular space 12 is provided inside the folded portion 11h (on the annular space 12 side). A flexible injection is provided in the injection port 15 via an injection tube 16. A hose (not shown) is connected. The number of inlets 15 can be changed as appropriate.

この袋体１０には、中壁コンクリート２４の上面２５と掘削面２６との間の隙間２７に配置された状態（図１参照）で、注入ホース及び注入口１５を介して、モルタル等の注入材８が注入される。ここで、前述のように、注入口１５は、注入材８が注入される袋体１０の内部（環状空間１２側）に設けられているため、注入材８は確実に環状空間１２内へ注入され、外部に漏れ出すことがない。尚、このとき、袋体１０内の空気を注入材８で完全に置換するために、袋体１０に排気ホースを介して排気装置（図示省略）を接続して、袋体１０内の空気を排出しながら注入材８を注入するようにしてもよい。 In the bag body 10, mortar or the like is injected through the injection hose and the injection port 15 in a state (see FIG. 1) arranged in the gap 27 between the upper surface 25 of the middle wall concrete 24 and the excavation surface 26. Material 8 is injected. Here, as described above, since the injection port 15 is provided in the bag body 10 (in the annular space 12 side) into which the injection material 8 is injected, the injection material 8 is reliably injected into the annular space 12. And will not leak out. At this time, in order to completely replace the air in the bag body 10 with the injection material 8, an exhaust device (not shown) is connected to the bag body 10 through an exhaust hose so that the air in the bag body 10 is The injection material 8 may be injected while being discharged.

ここで、注入材８が注入される環状空間１２を形成する、折り返し部１１ｈ及び表面部１１ｉには継ぎ目がないため、局所的に耐圧力の弱い部分が存在せず、袋体１０の耐圧力は高くなっている。尚、本実施形態の一例として、例えば、繊度が１１００ｄｔｅｘ／８×３本／ｃｍの経糸と、繊度が１１００ｄｔｅｘ／９×６．４本／ｃｍの緯糸とを使用し、さらに、小径部１１ａ，１１ｂの径Ｄ₁＝２００ｍｍ、小径部１１ａ，１１ｂの長さＬ₁＝３００ｍｍ、大径部１１ｃの径Ｄ₂＝１８００ｍｍ、大径部１１ｃの長さＬ₂＝１５００ｍｍ、大径部１１ｄの径Ｄ₃＝１０００ｍｍとして袋体１０を織成した（設計耐圧力は０．５ＭＰａ）。 Here, since the folded portion 11h and the surface portion 11i that form the annular space 12 into which the injection material 8 is injected are seamless, there is no locally weak pressure-resistant portion, and the pressure resistance of the bag body 10 Is getting higher. As an example of the present embodiment, for example, a warp having a fineness of 1100 dtex / 8 × 3 pieces / cm and a weft having a fineness of 1100 dtex / 9 × 6.4 pieces / cm are used, and the small diameter portion 11a, 11b diameter D ₁ = 200 mm, small diameter portions 11a and 11b length L ₁ = 300 mm, large diameter portion 11c diameter D ₂ = 1800 mm, large diameter portion 11c length L ₂ = 1500 mm, large diameter portion 11d diameter The bag body 10 was woven with D ₃ = 1000 mm (design withstand pressure was 0.5 MPa).

また、接続される異径筒状織物１１の両端部が小径部１１ａ，１１ｂであるため、環状空間１２内に注入材８を注入したときに両端部に作用する張力は比較的小さくなり、これら両端部での破断が生じにくい。さらに、両端部が小径であることから、その接続された両端部から注入材８が漏れにくい。 Moreover, since the both ends of the different diameter cylindrical fabric 11 to be connected are the small diameter portions 11a and 11b, the tension acting on both ends when the injection material 8 is injected into the annular space 12 becomes relatively small. Breakage at both ends is difficult to occur. Furthermore, since both ends have a small diameter, the injection material 8 is unlikely to leak from the connected both ends.

異径筒状織物１１は、連結部１１ｆにおいて内側へ折り曲げられているため、折り曲げられた部分の近傍において、折り返し部１１ｈの内側に形成される通路が小さくなる。従って、環状空間１２内に注入材８が注入されたときには、折り返し部１１ｈの内側の通路が塞がりやすくなるため、袋体１０が接触面に確実に押しつけられ、間詰めの効果が高くなる。また、袋体１０を膨張させた時に、折り曲げられた部分において長さ方向に伸展しようとして折り返し部１１ｈが表面部１１ｉに対してずれる現象が起きるが、大径部１１ｃ，１１ｄ，１１ｅよりも径の小さい連結部１１ｆにおいて折り曲げられていると、この折り曲げられた部分の位置がずれて、連結部１１ｆよりも大径の大径部１１ｄを越えて伸展することはなく、両端の２つの小径部１１ａ，１１ｂを接続する接続部に無理な力がかからない。 Since the different diameter tubular fabric 11 is folded inward at the connecting portion 11f, the passage formed inside the folded portion 11h becomes smaller in the vicinity of the folded portion. Therefore, when the injection material 8 is injected into the annular space 12, the passage inside the folded portion 11 h is easily blocked, so that the bag body 10 is reliably pressed against the contact surface, and the effect of filling is increased. In addition, when the bag body 10 is inflated, a phenomenon occurs in which the folded portion 11h is displaced with respect to the surface portion 11i in an attempt to extend in the length direction at the folded portion. If the bent portion 11f is bent, the position of the bent portion is shifted and does not extend beyond the large-diameter portion 11d having a larger diameter than the connecting portion 11f. An unreasonable force is not applied to the connecting portion connecting 11a and 11b.

また、３つの大径部１１ｃ，１１ｄ，１１ｅのうち、径の小さな２つの大径部１１ｄ，１１ｅ（第２大径部）が、径の大きな大径部１１ｃ（第１大径部）内に折り返されていることから、さらに蛇腹状に折り畳みやすく、袋体１０をコンパクトなサイズに折り畳むことが容易になる。また、折り返し部１１ｈが表面部１１ｉに比べて小径になっていることから、環状空間１２内に注入材８が注入されて袋体１０が膨張したときに、袋体１０に作用する長さ方向の引張力に対して、接続された異径筒状織物１１の両端部に作用する張力が小さくなる。 Of the three large-diameter portions 11c, 11d, and 11e, the two large-diameter portions 11d and 11e (second large-diameter portion) having a small diameter are included in the large-diameter portion 11c (first large-diameter portion) having a large diameter. Therefore, the bag body 10 can be easily folded into a bellows shape, and the bag body 10 can be easily folded into a compact size. Further, since the folded portion 11h has a smaller diameter than the surface portion 11i, the length direction acting on the bag body 10 when the injection material 8 is injected into the annular space 12 and the bag body 10 expands. The tension acting on both ends of the connected different-diameter tubular fabrics 11 becomes smaller with respect to the tensile force of.

次に、前述の土木用袋体１０を図１のめがねトンネルの施工において使用する手順について説明する。
図３（ｂ）に示すように、土木用袋体１０は、蛇腹状に折り畳まれてコンパクトなサイズになっており、取り扱いやすい状態で施工現場に搬入される。そして、施工現場において、掘削面２６と中壁コンクリート２４の間の隙間２７に袋体１０を並べて設置する。次に、袋体３０の注入口１５に注入ホースを接続する。また、注入ホースを、注入材８を吐出するポンプ（図示省略）に接続する。このポンプとしては、一般的に使用されているものを適用することが可能である。そして、ポンプから注入ホース及び注入口１５を介して袋体１０内の環状空間１２に注入材８を注入する。 Next, a procedure for using the above-mentioned civil engineering bag body 10 in the construction of the eyeglass tunnel of FIG. 1 will be described.
As shown in FIG. 3 (b), the civil engineering bag body 10 is folded in a bellows shape to have a compact size, and is carried into the construction site in an easy-to-handle state. Then, at the construction site, the bags 10 are installed side by side in the gap 27 between the excavation surface 26 and the middle wall concrete 24. Next, an injection hose is connected to the injection port 15 of the bag body 30. Further, the injection hose is connected to a pump (not shown) for discharging the injection material 8. As this pump, a commonly used pump can be applied. Then, the injection material 8 is injected from the pump into the annular space 12 in the bag body 10 through the injection hose and the injection port 15.

このように袋体１０に注入材８を注入して袋体１０を膨張させることにより、地山の掘削面２６に対して中壁コンクリート２４を反力にして、プレロードをかけて地山の沈下を抑制することができる。尚、袋体１０は継ぎ目のない構造となっているため、袋体１０を膨張させる際に高い圧力を作用させても、袋体１０が破断しにくい。 Thus, by injecting the injection material 8 into the bag body 10 and inflating the bag body 10, the inner wall concrete 24 is made a reaction force against the excavation surface 26 of the natural ground, the preload is applied, and the natural ground sinks. Can be suppressed. In addition, since the bag body 10 has a seamless structure, the bag body 10 is not easily broken even when a high pressure is applied when the bag body 10 is inflated.

次に、前記実施形態に種々の変更を加えた変更形態について説明する。但し、前記実施形態と同様の構成を有するものについては、同じ符号を付して適宜その説明を省略する。
前記実施形態の異径筒状織物１１は連結部１１ｆにおいて内側に折り曲げられているが、大径部において折り曲げられていてもよい。例えば、図５に示すように、この変更形態の異径筒状織物４１は、両端部の２つの小径部４１ａ，４１ｂと、３つの大径部４１ｃ，４１ｄ，４１ｅと、３つの大径部４１ｃ，４１ｄ，４１ｅを連結する２つの連結部４１ｆ，４１ｇとを有する。大径部４１ｃは、他の２つの大径部４１ｄ，４１ｅよりも径が大きく、また、その長さは、異径筒状織物４１の全体の約２／３の長さに等しい。そして、この異径筒状織物４１から土木用袋体を製造する場合には、図６に示すように、小径部４１ｂ側の、２つの大径部４１ｄ，４１ｅを含む異径筒状織物４１の半分を大径部４１ｃ内へ折り返し、さらに、大径部４１ｃの途中部において折り曲げられた状態にして、両端部の小径部４１ａ，４１ｂを接続する。このとき、内側の折り返し部４１ｈと外側の表面部４１ｉとの間に、注入材が注入される環状空間４２が形成される。 Next, modified embodiments obtained by adding various modifications to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.
Although the different-diameter tubular fabric 11 of the embodiment is bent inward at the connecting portion 11f, it may be bent at the large-diameter portion. For example, as shown in FIG. 5, this modified tubular fabric 41 of different diameters includes two small-diameter portions 41a and 41b at both ends, three large-diameter portions 41c, 41d, and 41e, and three large-diameter portions. It has two connection parts 41f and 41g which connect 41c, 41d, and 41e. The large-diameter portion 41c has a larger diameter than the other two large-diameter portions 41d and 41e, and the length thereof is equal to about 2/3 of the entire different-diameter tubular fabric 41. And when manufacturing the civil engineering bag from this different diameter cylindrical fabric 41, as shown in FIG. 6, the different diameter cylindrical fabric 41 including two large diameter portions 41d and 41e on the small diameter portion 41b side is provided. Are folded back into the large-diameter portion 41c and further bent in the middle of the large-diameter portion 41c, and the small-diameter portions 41a and 41b at both ends are connected. At this time, an annular space 42 into which the injection material is injected is formed between the inner folded portion 41h and the outer surface portion 41i.

この場合には、折り曲げられた部分の近傍において、異径筒状織物４１の折り返し部４１ｈと表面部４１ｉとが略同じ幅となるため、保管の際などに袋体を折り畳みやすくなる。また、袋体の先端部（折り曲げられた部分の近傍部）の緯糸に余裕があるため、袋体に注入材が注入されたときには袋体の先端部がより膨張しやすくなり、袋体が間詰めを行う面に略均一に押しつけられる。また、袋体に局部的な力が作用しにくくなる。 In this case, since the folded portion 41h and the surface portion 41i of the different-diameter tubular fabric 41 have substantially the same width in the vicinity of the folded portion, the bag body can be easily folded during storage. In addition, since there is a margin in the weft at the tip of the bag (near the folded portion), when the injection material is injected into the bag, the tip of the bag is more likely to expand, and the bag It is almost uniformly pressed against the surface to be stuffed. Moreover, it becomes difficult for local force to act on the bag.

また、本発明の土木用袋体は、前述したように、めがねトンネルの施工時の間詰め以外にも、種々の用途に使用できる。例えば、特開２００１−１７３３９４号公報（図５等参照）に記載されているような、トンネル工事の際の支保工を建て込むときに、この支保工の脚部と地盤との間に挿入される袋体に本発明を適用することもできる。この袋体にモルタル、コンクリート等の流動性を有する注入材が注入されると、袋体は膨張して支保工を支える。 In addition, as described above, the civil engineering bag of the present invention can be used for various purposes other than the filling during the construction of the glasses tunnel. For example, when a supporting work for tunnel construction as described in Japanese Patent Application Laid-Open No. 2001-173394 (see FIG. 5 etc.) is installed, it is inserted between the legs of the supporting work and the ground. The present invention can also be applied to a bag body. When an injection material having fluidity such as mortar or concrete is injected into the bag body, the bag body expands to support the support work.

あるいは、特開２００３−１３４５５号公報に記載されているように、法面の崩壊を防止するために、法面の地盤にブロックを設置し、このブロックをアンカーで固定する場合に、地盤とブロックとの間に配設されてこれらの間の隙間を埋めるための袋体に、本発明を適用することもできる。この袋体にモルタル等の注入材が注入されると、袋体が膨張して地盤とブロックとの間の隙間を埋めるため、ブロックを地盤に密着した状態で固定することができる。 Alternatively, as described in Japanese Patent Application Laid-Open No. 2003-13455, in order to prevent the slope from collapsing, when the block is installed on the slope ground and this block is fixed with an anchor, the ground and the block The present invention can also be applied to a bag body that is disposed between and for filling a gap between them. When an injection material such as mortar is injected into this bag body, the bag body expands and fills the gap between the ground and the block, so that the block can be fixed in close contact with the ground.

本発明の実施形態に係るめがねトンネル施工時のトンネル断面図である。It is tunnel sectional drawing at the time of the eyeglass tunnel construction which concerns on embodiment of this invention. 異径筒状織物の平面図である。It is a top view of a different diameter cylindrical fabric. 土木用袋体を示す図であり、（ａ）は折り畳まれる前の状態の断面図、（ｂ）は折り畳まれた状態の断面図である。It is a figure which shows the bag for civil engineering, (a) is sectional drawing of the state before folding, (b) is sectional drawing of the folded state. 別の形態の土木用袋体の注入口付近の拡大図である。It is an enlarged view of the vicinity of the injection port of another form of civil engineering bag. 変更形態の異径筒状織物の平面図である。It is a top view of the different diameter cylindrical textile fabric of a change form. 一端が内側へ折り返された状態の異径筒状織物の断面図である。It is sectional drawing of the different diameter cylindrical textile fabric in the state by which the end was folded inward.

Explanation of symbols

８注入材
１０土木用袋体
１１異径筒状織物
１１ａ，１１ｂ小径部
１１ｃ，１１ｄ，１１ｅ大径部
１１ｆ，１１ｇ連結部
１１ｈ折り返し部
１１ｉ表面部
１２環状空間
１３パイプ
１５注入口
４１異径筒状織物
４１ａ，４１ｂ小径部
４１ｃ，４１ｄ，４１ｅ大径部
４１ｆ，４１ｇ連結部
４１ｈ折り返し部
４１ｉ表面部 8 Injection Material 10 Civil Engineering Bag 11 Different Diameter Cylindrical Fabric 11a, 11b Small Diameter Part 11c, 11d, 11e Large Diameter Part 11f, 11g Connection Part 11h Folding Part 11i Surface Part 12 Annular Space 13 Pipe 15 Inlet 41 Different Diameter Cylinder Shaped fabric 41a, 41b Small diameter part 41c, 41d, 41e Large diameter part 41f, 41g Connection part 41h Folding part 41i Surface part

Claims

Two small diameter portions respectively formed at both ends thereof, a plurality of large diameter portions formed between the two small diameter portions, a diameter smaller than the plurality of large diameter portions, and the plurality of large diameter portions Comprising a tubular fabric of different diameters having a connecting portion for connecting the portions,
The small-diameter tubular woven fabric is connected to the two small-diameter portions that overlap each other in the folded state in the tube length direction, and an annular space is formed between the inner folded portion and the outer surface portion,
A civil engineering bag characterized in that an injection port for injecting an injection material is provided in the annular space.

The said different diameter cylindrical fabric is a seamless fabric consisting of a plurality of warps and wefts that are continuously woven in a spiral shape with respect to the plurality of warps. Civil engineering bags.

The civil engineering bag according to claim 1 or 2, wherein two small-diameter portions at both ends of the different-diameter tubular fabric are connected via a pipe.

The civil engineering bag according to any one of claims 1 to 3, wherein the different-diameter tubular fabric is bent inward at the connecting portion.

The civil engineering bag according to any one of claims 1 to 3, wherein the different-diameter tubular fabric is bent inward at the large-diameter portion.

The plurality of large diameter portions include a first large diameter portion and a second large diameter portion having a diameter smaller than the first large diameter portion and larger in diameter than the small diameter portion and the connecting portion,
The civil engineering bag according to any one of claims 1 to 5, wherein the second large-diameter portion is folded back into the first large-diameter portion.

The civil engineering bag according to any one of claims 1 to 6, wherein the injection port is provided on the annular space side of the folded portion.