JPH0816438B2 - How to suppress loosening - Google Patents
How to suppress looseningInfo
- Publication number
- JPH0816438B2 JPH0816438B2 JP2004693A JP469390A JPH0816438B2 JP H0816438 B2 JPH0816438 B2 JP H0816438B2 JP 2004693 A JP2004693 A JP 2004693A JP 469390 A JP469390 A JP 469390A JP H0816438 B2 JPH0816438 B2 JP H0816438B2
- Authority
- JP
- Japan
- Prior art keywords
- tunnel hole
- wall surface
- bag
- ground
- water
- 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.)
- Expired - Lifetime
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、トンネル掘削工事において、支保工の外
側面（裏面）に空洞を生じなくすることにより、地山の
ゆるみを防止する地山のゆるみ抑制方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention prevents the loosening of the ground by preventing the formation of cavities on the outer surface (back surface) of the support during tunnel excavation work. The present invention relates to a loosening suppression method.
一般に、トンネル掘削工事においては、第５図および
第６図に示すように、地山１に穿孔したトンネル穴２の
壁面に、所定間隔を保つてアーチ状の支保工３を配設す
るとともに、トンネル穴２の壁面にコンクリートを吹き
付けコンクリート層４を形成することにより地山１の崩
壊を防止するようになつている。Generally, in the tunnel excavation work, as shown in FIGS. 5 and 6, on the wall surface of the tunnel hole 2 drilled in the natural ground 1, arch-shaped support works 3 are arranged at a predetermined interval, and Concrete is sprayed on the wall surface of the tunnel hole 2 to form the concrete layer 4, so that the ground 1 is prevented from collapsing.
しかしながら、上記のような方法では、支保工３の裏
面側にコンクリートを充分に充填することが困難であ
り、支保工３の裏面側に空洞５が生じる。特に、軟弱な
地山１の掘削工事においては、地山の崩壊防止のため
に、幅広（200m/m程度）の支保工３が用いられており、
この場合、上記空洞５は、さらに発生しやすくなる。そ
の結果、上記空洞５が地山１のゆるみの原因となつて、
周辺地山に変位を引き起こすという問題が生じている。However, according to the method as described above, it is difficult to sufficiently fill the back surface side of the support work 3 with concrete, and the cavity 5 is formed on the back surface side of the support work 3. Especially in the excavation work of the soft ground 1, a wide support (about 200 m / m) is used to prevent the ground from collapsing.
In this case, the cavity 5 is more likely to occur. As a result, the cavity 5 causes the loosening of the natural ground 1,
There is a problem of causing displacement in the surrounding ground.
この発明は、このような事情に鑑みなされたもので、
支保工３の裏面側に空洞を生じさせないことにより、地
山のゆるみを抑制する地山のゆるみ抑制方法の提供をそ
の目的とする。The present invention has been made in view of such circumstances,
It is an object of the present invention to provide a method for suppressing the loosening of the ground by suppressing the loosening of the ground by not forming a cavity on the back surface side of the support work 3.
上記の目的を達成するため、この発明の地山のゆるみ
抑制方法は、地山に設けたトンネル穴内に、トンネル穴
の壁面に沿わせた状態で配設されたアーチ状の支保工の
外面に、支保工とトンネル穴の壁面との間の隙間を埋め
るように、骨材と膨張凝固剤内蔵の吸水性袋体よりなる
空洞充填袋を取り付け、その状態で上記トンネル穴の壁
面にコンクリート層を形成し、上記袋体内に、地山の水
分を吸収させるか、または散水によつて袋体内に吸水さ
せることにより、上記膨張凝固剤を膨張凝固させ、支保
工の外面側におけるトンネル穴の壁面とコンクリート層
との間に空間部が生じないようにするという構成をと
る。In order to achieve the above object, the method for suppressing loosening of the ground of the present invention is, in the tunnel hole provided in the ground, on the outer surface of the arch-shaped support work arranged along the wall surface of the tunnel hole. , A cavity filling bag consisting of aggregate and a water-absorbent bag containing an expansion coagulant is installed so as to fill the gap between the support work and the wall surface of the tunnel hole, and in that state a concrete layer is applied to the wall surface of the tunnel hole. Formed, in the bag body, by absorbing the moisture of the ground, or by absorbing water into the bag body by sprinkling, to expand and solidify the expansion coagulant, and the wall surface of the tunnel hole on the outer surface side of the support work It is configured so that no space is created between it and the concrete layer.
すなわち、この発明の地山のゆるみ抑制方法は、内部
に骨材と、膨張凝固剤が充填された吸水性の袋体からな
る空洞充填袋を、支保工とトンネル穴の壁面との間の隙
間に取り付け、その状態で、トンネル穴の壁面に、コン
クリート層を形成し、上記袋内にコンクリート層の水分
もしくは地山の水分を吸収させるか、または、散水して
袋体内に吸水させ、袋体内の膨張凝固剤を膨張凝固させ
るようになつている。したがつて、支保工の外面側に生
じている空間部が固化した袋体で埋められてしまう。そ
の結果、地山のゆるみが防止され周辺地山に変位が発生
することがなくなる。また、この際、袋体内には、骨材
が入つているため、固化した袋体が、高強度に維持され
る。That is, the method for suppressing loosening of the ground according to the present invention provides a hollow filling bag composed of an aggregate and a water-absorbent bag filled with an expansion coagulant, and a gap between the support and the wall surface of the tunnel hole. In that state, form a concrete layer on the wall surface of the tunnel hole, and absorb the moisture of the concrete layer or the moisture of the ground in the bag, or sprinkle it to absorb water in the bag body, It is designed to expand and solidify the expansion coagulant. Therefore, the space formed on the outer surface side of the support work is filled with the solidified bag. As a result, the loosening of the ground is prevented, and the surrounding ground is not displaced. Further, at this time, since the aggregate is contained in the bag body, the solidified bag body is maintained at high strength.
つぎに、この発明を実施例にもとづいて詳しく説明す
る。Next, the present invention will be described in detail based on examples.
第１図は、この発明に使用する空洞充填袋６を示して
いる。この空洞充填袋６は、吸水性を有する布で構成さ
れており、内部に、ゴム屑からなる骨材と吸水性ポリマ
ーからなる凝固剤が充填されている。そして、長さが2m
で、幅が20cmに設定され、外周面には、長手方向に沿つ
て一定間隔で、両面テープ７が貼着されている。FIG. 1 shows a cavity filling bag 6 used in the present invention. The cavity-filling bag 6 is made of a water-absorbent cloth, and the inside thereof is filled with an aggregate made of rubber scraps and a coagulant made of a water-absorbent polymer. And the length is 2m
The width is set to 20 cm, and the double-faced tape 7 is attached to the outer peripheral surface at regular intervals along the longitudinal direction.
上記空洞充填袋６を用いて、地山のゆるみ抑制は、つ
ぎのようにして行われる。すなわち、まずトンネル穴内
にアーチ状の支保工（幅約20cm）を所定間隔で配設す
る。そして、第２図に示すように、その支保工８の外側
面とトンネル穴の壁面との間の隙間に、複数個の空洞充
填袋６を、図示のように取り付ける。ついで、その状態
で、トンネル穴２の壁面にコンクリート層４を吹き付け
形成する。そして、トンネル穴２内に散水することによ
り、空洞充填袋６内に水分を吸収させる。その結果、空
洞充填袋６内の凝固剤が膨張凝固し、第３図および第４
図に示すように膨張した状態で固化した空洞充填袋6a
が、支保工８の外面側に生じた空洞を埋めつぶしてしま
う。このため、空洞がなくなつて、地山１のゆるみが抑
制され、地山１の変位発生が防止される。また、空洞充
填袋６内に充填する骨材として、軽量でかつ耐久性のあ
るゴム屑が用いられているため、支保工８の重量が大き
くなることがなく施工が容易であるとともに、長期間に
わたつて、上記地山１のゆるみ抑制作用が可能になる。
さらに、空洞充填袋６の支保工８への取り付けが両面テ
ープ７で双方を貼り付けるだけであるため、極めて簡単
である。Using the cavity-filling bag 6 described above, the loosening of the ground is suppressed as follows. That is, first, arch-like supports (width of about 20 cm) are arranged at predetermined intervals in the tunnel holes. Then, as shown in FIG. 2, a plurality of cavity filling bags 6 are attached in the gap between the outer surface of the support 8 and the wall surface of the tunnel hole as shown in the drawing. Then, in this state, the concrete layer 4 is formed by spraying on the wall surface of the tunnel hole 2. Then, water is absorbed in the cavity filling bag 6 by sprinkling water in the tunnel hole 2. As a result, the coagulant in the cavity filling bag 6 expands and solidifies, and the coagulant in FIGS.
Cavity filling bag 6a solidified in the expanded state as shown in the figure
However, the cavities formed on the outer surface side of the support work 8 are filled. Therefore, the hollow is eliminated, the looseness of the natural ground 1 is suppressed, and the occurrence of displacement of the natural ground 1 is prevented. In addition, since lightweight and durable rubber scraps are used as the aggregate to be filled in the cavity filling bag 6, the weight of the support work 8 does not increase and the construction is easy, and at the same time, for a long period of time. Over time, the loosening suppressing effect of the natural ground 1 becomes possible.
Furthermore, since the cavity filling bag 6 is attached to the support 8 only by attaching the both sides with the double-sided tape 7, it is extremely easy.
なお、上記実施例では、空洞充填袋６を膨張凝固させ
る際に、トンネル穴２内に散水して、空洞充填袋６に吸
水させるようにしているが、散水せずに放置しておき、
地山１から浸み出る水分を空洞充填袋６に吸水させても
よい。これによると、散水作業を手間を省くことがで
き、かつ上記方法と同様の効果を得ることができる。ま
た、骨材としては、ゴム屑に限定するものではなく、他
のものでもよいが、軽量で耐久性があり、かつ安価なも
のを使用することが好ましい。さらに、凝固剤として
は、吸水性ポリマーの外、吸水して膨張凝固するもので
あれば何でも使用することができる。さらに、上記実施
例では支保工８をトンネル穴内に配設したのち空洞充填
袋６を取り付けているが、予め支保工８に空洞充填袋６
を取り付けておき、この袋６付きの支保工８をトンネル
内に配設するようにしてもよい。In the above embodiment, when the cavity filling bag 6 is inflated and solidified, water is sprinkled in the tunnel holes 2 so that the cavity filling bag 6 absorbs water.
Moisture leaching from the natural ground 1 may be absorbed by the cavity filling bag 6. According to this, it is possible to save the trouble of water sprinkling work and obtain the same effect as the above method. Further, the aggregate is not limited to rubber scraps, and other aggregates may be used, but it is preferable to use a lightweight, durable and inexpensive aggregate. Further, as the coagulant, in addition to the water-absorbent polymer, any one that absorbs water and expands and solidifies can be used. Further, in the above embodiment, the cavity filling bag 6 is attached after the support 8 is arranged in the tunnel hole.
Alternatively, the supporting work 8 with the bag 6 may be arranged in the tunnel.
以上のように、この発明は、吸水によつて膨張凝固し
た袋体が、支保工の外面側に生じる空間部を埋めつぶし
てしまうため、空間部がなくなり、地山のゆるみが抑制
され地山に変位が生じなくなる。As described above, according to the present invention, the bag body that is inflated and solidified by absorbing water fills the space portion generated on the outer surface side of the supporting work, so that the space portion is eliminated and the looseness of the ground is suppressed. No displacement occurs.
第１図は、この発明の一実施例に用いる空洞充填袋の斜
視図、第２図は、支保工に空洞充填袋を貼り付けた状態
を示す正面図、第３図および第４図はその支保工をトン
ネル穴内に取り付けた状態を説明する断面図、第５図お
よび第６図は従来例による支保工の取り付け状態を説明
する断面図である。 １……地山、２……トンネル穴、４……コンクリート
層、５……空洞、６……空洞充填袋、８……支保工FIG. 1 is a perspective view of a cavity-filling bag used in an embodiment of the present invention, FIG. 2 is a front view showing a state in which the cavity-filling bag is attached to a support, and FIGS. 3 and 4 show the same. FIG. 5 and FIG. 6 are cross-sectional views for explaining a state in which the supporting work is installed in the tunnel hole, and FIGS. 5 and 6 are sectional views for explaining a mounting state of the support work in the conventional example. 1 ... Ground, 2 ... Tunnel hole, 4 ... Concrete layer, 5 ... Hollow, 6 ... Hollow filling bag, 8 ... Supporting work
Claims (1)
の壁面に沿わせた状態で配設されたアーチ状の支保工の
外面に、支保工とトンネル穴の壁面との間の隙間を埋め
るように、骨材と膨張凝固剤内蔵の吸水性袋体よりなる
空洞充填袋を取り付け、その状態で上記トンネル穴の壁
面にコンクリート層を形成し、上記袋体内に、地山の水
分を吸収させるか、または散水によって袋体内に吸水さ
せることにより、上記膨張凝固剤を膨張凝固させ、支保
工の外面側におけるトンネル穴の壁面とコンクリート層
との間に空間部が生じないようにすることを特徴とする
地山のゆるみ抑制方法。1. A gap between the support work and the wall surface of the tunnel hole is provided on the outer surface of the arch-like support work arranged in the tunnel hole provided in the natural ground along the wall surface of the tunnel hole. A hollow filling bag consisting of aggregate and a water-absorbent bag with a built-in expansion coagulant is attached so as to be filled, and in that state a concrete layer is formed on the wall surface of the tunnel hole to absorb the natural moisture in the bag body. Or by causing water to be absorbed into the bag body by sprinkling water, the expansion and coagulation agent is expanded and solidified so that a space is not formed between the wall surface of the tunnel hole and the concrete layer on the outer surface side of the support work. A characteristic method for suppressing loosening of natural ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004693A JPH0816438B2 (en) | 1990-01-12 | 1990-01-12 | How to suppress loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004693A JPH0816438B2 (en) | 1990-01-12 | 1990-01-12 | How to suppress loosening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03208992A JPH03208992A (en) | 1991-09-12 |
| JPH0816438B2 true JPH0816438B2 (en) | 1996-02-21 |
Family
ID=11590971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004693A Expired - Lifetime JPH0816438B2 (en) | 1990-01-12 | 1990-01-12 | How to suppress loosening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816438B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4680438B2 (en) * | 2001-08-01 | 2011-05-11 | 芦森工業株式会社 | Cylindrical bag |
-
1990
- 1990-01-12 JP JP2004693A patent/JPH0816438B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03208992A (en) | 1991-09-12 |
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