JP2000073697A - Leg pile method - Google Patents
Leg pile methodInfo
- Publication number
- JP2000073697A JP2000073697A JP10243767A JP24376798A JP2000073697A JP 2000073697 A JP2000073697 A JP 2000073697A JP 10243767 A JP10243767 A JP 10243767A JP 24376798 A JP24376798 A JP 24376798A JP 2000073697 A JP2000073697 A JP 2000073697A
- Authority
- JP
- Japan
- Prior art keywords
- leg
- leg pile
- pile
- tunnel
- arch support
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はトンネルのアーチ支
保工を支持するためのレッグパイル工法に関するもので
あり、特に、杭効果を確実にして沈下防止を図るレッグ
パイル工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg pile method for supporting arch support of a tunnel, and more particularly to a leg pile method for ensuring a pile effect and preventing settlement.
【０００２】[0002]
【従来の技術】道路断面トンネルに於いて、地質が土砂
地山等の不良地山である場合、上半断面の支保脚部が沈
下を生じることがあり、然るときは、下半掘削ができな
かったり、トンネル自体の安定性に支障をきたす虞があ
る。これを防止する補助工法として、レッグパイル工法
が知られている。2. Description of the Related Art In a road section tunnel, when the geology is poor ground such as earth and sand ground, the supporting leg portion of the upper half section may be settled. It may not be possible or may hinder the stability of the tunnel itself. As an auxiliary construction method for preventing this, a leg pile construction method is known.
【０００３】レッグパイル工法は、図４及び図５に示す
ように、トンネルの掘削方向（図５の矢印Ｓ方向）へ所
定間隔でアーチ支保工１，１…を設け、夫々のアーチ支
保工１に隣接してトンネル下半部の地中へレッグパイル
２を打設する。そして、該レッグパイル２の内部へセメ
ントミルクを注入した後、アーチ支保工１に取り付けた
受け桁３にレッグパイルの頭部２ａを支持させる。更
に、受け桁３の上部に補強ブラケット４を固設する。こ
のように、上半地山荷重をレッグパイル２へ伝達させた
状態で、トンネルの下半掘削を行う。In the leg pile method, as shown in FIGS. 4 and 5, arch supports 1, 1,... Are provided at predetermined intervals in a tunnel excavation direction (the direction of arrow S in FIG. 5). Next, a leg pile 2 is placed in the ground in the lower half of the tunnel. Then, after injecting the cement milk into the inside of the leg pile 2, the head 2 a of the leg pile is supported by the receiving girder 3 attached to the arch support 1. Further, a reinforcing bracket 4 is fixedly mounted on the upper part of the receiving girder 3. In this manner, the lower half of the tunnel is excavated while the upper half ground load is transmitted to the leg pile 2.
【０００４】[0004]
【発明が解決しようとする課題】前述したように、トン
ネル下半部の地中へ打設したレッグパイル２により、ア
ーチ支保工１の沈下を防止することができる。しかし、
設置した受け桁３と補強ブラケット４が覆工コンクリー
ト５の巻厚内に入るため、防水シートを張る前に受け桁
３と補強ブラケット４を撤去しなければならず、撤去作
業が煩雑であるとともに、上半地山荷重の伝達が損なわ
れる。As described above, the leg pile 2 cast into the ground in the lower half of the tunnel can prevent the arch support 1 from sinking. But,
Since the installed girder 3 and the reinforcing bracket 4 enter the thickness of the lining concrete 5, the girder 3 and the reinforcing bracket 4 must be removed before the waterproof sheet is stretched, and the removal work is complicated. In addition, the transmission of the upper mountain ground load is impaired.
【０００５】そこで、レッグパイル工法に於ける作業性
を改善するとともに、覆工コンクリート施工後も確実に
杭効果を発揮できるようにするために解決すべき技術的
課題が生じてくるのであり、本発明はこの課題を解決す
ることを目的とする。[0005] Therefore, there is a technical problem to be solved in order to improve the workability in the leg pile method and to ensure that the pile effect can be exerted even after the lining concrete is constructed. The invention aims to solve this problem.
【０００６】[0006]
【課題を解決するための手段】本発明は上記目的を達成
するために提案されたものであり、トンネル上半断面を
支持するために掘削方向へ所定間隔でアーチ支保工を設
け、該アーチ支保工に隣接してトンネルの下半部の地中
へレッグパイルを打設し、このレッグパイルの頭部を前
記アーチ支保工に支持させるレッグパイル工法に於い
て、前記アーチ支保工に予めレッグパイルの頭部を挿入
できる受け金具を固設しておき、トンネルの掘削方向へ
所定間隔でアーチ支保工を設けた後、この受け金具内へ
削孔機によってレッグパイルを打設し、該受け金具とレ
ッグパイルの頭部とを高強度モルタルにて固着したレッ
グパイル工法を提供するものである。SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object. In order to support an upper half section of a tunnel, arch supports are provided at predetermined intervals in an excavation direction, and the arch supports are provided. In the leg pile method in which a leg pile is cast into the ground in the lower half of the tunnel adjacent to the work and the head of the leg pile is supported by the arch support, the leg pile is previously attached to the arch support. After fixing a receiving bracket into which the head can be inserted, and providing arch supports at predetermined intervals in the tunnel excavation direction, a leg pile is driven into the receiving bracket by a drilling machine, and the receiving bracket is mounted. The present invention provides a leg pile method in which the head and the head of the leg pile are fixed with a high-strength mortar.
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施の形態を図
１乃至図３に従って詳述する。本発明では、アーチ支保
工１を製作するとき予め受け金具１０を固設しておく。
該受け金具１０にはレッグパイルの頭部２ａを挿入でき
る開口部１０ａが備えられている。尚、符号１１はアー
チ支保工１に固着した当て板（鋼鈑）であり、この当て
板１１を介して受け金具１０が取り付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. In the present invention, when the arch support 1 is manufactured, the receiving metal fitting 10 is fixed in advance.
The receiving fitting 10 has an opening 10a into which the head 2a of the leg pile can be inserted. Reference numeral 11 denotes a backing plate (steel plate) fixed to the arch support 1, and the receiving fitting 10 is attached via the backing plate 11.
【０００８】而して、トンネルの掘削方向へ所定間隔で
上記アーチ支保工１，１…を設置した後、前記受け金具
１０の開口部１０ａへ削孔機（図示せず）を使用してレ
ッグパイル２を打設する。そして、該レッグパイル２の
内部へセメントミルクを注入し、受け金具１０の内側部
とレッグパイルの頭部２ａとの隙間へ高強度モルタル１
１を充填して、該受け金具１０とレッグパイルの頭部２
ａとを固着する。After the arch supports 1, 1... Are installed at predetermined intervals in the direction of excavation of the tunnel, the legs are inserted into the opening 10a of the receiving fitting 10 by using a drilling machine (not shown). Pile 2 is placed. Then, cement milk is injected into the inside of the leg pile 2, and a high-strength mortar 1 is inserted into a gap between the inside of the receiving metal fitting 10 and the head 2 a of the leg pile.
1 and the receiving fitting 10 and the head 2 of the leg pile.
a.
【０００９】尚、図示は省略するが、削孔機のビットの
通過やレッグパイル２の固着作業を用意にするために、
レッグパイル２の外側にガイド管を挿入して前記受け金
具１０内を二重管構造にし、このガイド管を受け金具１
０の内側部へ溶着した後に、受け金具１０内の隙間へ高
強度モルタル１１を充填してもよい。Although not shown, in order to facilitate the passage of the bit of the drilling machine and the fixing work of the leg pile 2,
A guide tube is inserted outside the leg pile 2 so that the inside of the receiving fitting 10 has a double pipe structure.
After welding to the inside portion of the mortar 0, the gap in the receiving fitting 10 may be filled with the high-strength mortar 11.
【００１０】斯くして、アーチ支保工１とレッグパイル
２が一体となり、上半地山荷重をレッグパイル２へ確実
に伝達させた状態で、トンネルの下半掘削を行うことが
できる。そして、前記受け金具１０が覆工コンクリート
５の巻厚内に殆ど突出しないので、そのまま残存可能で
ある。依って、従来の受け桁や補助ブラケットのように
煩雑な撤去作業を必要とせず、上半地山荷重の伝達が損
なわれることもない。Thus, the lower half excavation of the tunnel can be performed in a state where the arch support 1 and the leg pile 2 are integrated, and the upper half ground load is reliably transmitted to the leg pile 2. And since the said receiving metal fitting 10 hardly protrudes into the winding thickness of the lining concrete 5, it can remain as it is. Therefore, it is not necessary to perform a complicated removal work unlike the conventional girder or auxiliary bracket, and the transmission of the upper half ground load is not impaired.
【００１１】尚、前記アーチ支保工１の両側に受け金具
１０，１０を固設しておき、該アーチ支保工１を挟んで
レッグパイル２，２を打設すれば、杭効果が一層向上し
て土砂地山での大断面トンネル施工が可能となる。Incidentally, by fixing receiving brackets 10, 10 on both sides of the arch support 1 and driving the leg piles 2, 2 across the arch support 1, the pile effect is further improved. Large-section tunnels can be constructed on soils.
【００１２】而して、本発明は、本発明の精神を逸脱し
ない限り種々の改変を為すことができ、そして、本発明
が該改変されたものに及ぶことは当然である。Thus, the present invention can be variously modified without departing from the spirit of the present invention, and it is natural that the present invention extends to the modified ones.
【００１３】[0013]
【発明の効果】本発明は上記一実施の形態に詳述したよ
うに、予めアーチ支保工に受け金具を固設しておき、ト
ンネル下半部の地中へ打設したレッグパイルの頭部を該
受け金具へ固着することにより、該受け金具を通じてア
ーチ支保工とレッグパイルとが一体となるので、トンネ
ルの上半荷重をレッグパイルが受け持ってアーチ支保工
の沈下を防止できる。また、従来の受け桁や補助ブラケ
ットのように煩雑な撤去作業がなく、覆工コンクリート
施工後も継続してトンネルの上半荷重をレッグパイルへ
伝達できる。According to the present invention, as described in detail in the above-mentioned embodiment, a receiving bracket is fixed to an arch support in advance, and the head of a leg pile is driven into the ground in the lower half of the tunnel. Is fixed to the receiving fitting, the arch support and the leg pile are integrated through the receiving fitting, so that the upper half load of the tunnel can be received by the leg pile and the arch support can be prevented from sinking. In addition, there is no complicated removal work as in the case of the conventional girder or auxiliary bracket, and the upper half load of the tunnel can be continuously transmitted to the leg pile even after the lining concrete is constructed.
【００１４】斯くして、レッグパイル工法に於ける作業
性が改善されるとともに、覆工コンクリート施工後も確
実に杭効果を発揮できる等、正に諸種の効果を奏する発
明である。[0014] Thus, the present invention provides various effects, such as improved workability in the leg pile method and a reliable pile effect even after the lining concrete is constructed.
【図１】本発明の一実施の形態を示す正面図。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】図１の側面図。FIG. 2 is a side view of FIG. 1;
【図３】図１のＡ−Ａ線断面図。FIG. 3 is a sectional view taken along line AA of FIG. 1;
【図４】従来技術を示す正面図。FIG. 4 is a front view showing a conventional technique.
【図５】従来技術を示す側面図。FIG. 5 is a side view showing a conventional technique.
１ アーチ支保工 ２ レッグパイル ２ａ レッグパイルの頭部 １０ 受け金具 １０ａ 開口部 １１ 高強度モルタル DESCRIPTION OF SYMBOLS 1 Arch support 2 Leg pile 2a Leg pile head 10 Receiving bracket 10a Opening 11 High strength mortar
Claims (1)
削方向へ所定間隔でアーチ支保工を設け、該アーチ支保
工に隣接してトンネル下半部の地中へレッグパイルを打
設し、このレッグパイルの頭部を前記アーチ支保工に支
持させるレッグパイル工法に於いて、前記アーチ支保工
に予めレッグパイルの頭部を挿入できる受け金具を固設
しておき、トンネルの掘削方向へ所定間隔でアーチ支保
工を設けた後、この受け金具内へ削孔機によってレッグ
パイルを打設し、該受け金具とレッグパイルの頭部とを
高強度モルタルにて固着したことを特徴とするレッグパ
イル工法。1. An arch support is provided at predetermined intervals in an excavation direction to support an upper half section of a tunnel, and a leg pile is cast into the ground in a lower half of the tunnel adjacent to the arch support. In the leg pile method in which the head of the leg pile is supported by the arch support, a receiving bracket into which the head of the leg pile can be inserted is fixed to the arch support in advance and a predetermined direction is defined in the tunnel excavation direction. After the arch supports are provided at intervals, a leg pile is driven into the receiving bracket by a drilling machine, and the receiving bracket and the head of the leg pile are fixed with a high-strength mortar. Pile method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10243767A JP2000073697A (en) | 1998-08-28 | 1998-08-28 | Leg pile method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10243767A JP2000073697A (en) | 1998-08-28 | 1998-08-28 | Leg pile method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000073697A true JP2000073697A (en) | 2000-03-07 |
Family
ID=17108683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10243767A Withdrawn JP2000073697A (en) | 1998-08-28 | 1998-08-28 | Leg pile method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000073697A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162366A (en) * | 2005-12-15 | 2007-06-28 | Okumura Corp | Timbering settlement restraining structure of tunnel |
| JP2014091992A (en) * | 2012-11-06 | 2014-05-19 | Ohbayashi Corp | Tunnel supporting reinforcement structure, and tunnel construction method using tunnel supporting reinforcement structure |
| JP2016141946A (en) * | 2015-01-30 | 2016-08-08 | 株式会社大林組 | Guide member for guiding pile, and tunnel ground support method |
| CN109707414A (en) * | 2018-12-29 | 2019-05-03 | 中铁五局集团有限公司 | A kind of adjustable grillage processing tool in tunnel |
| CN110005444A (en) * | 2019-05-05 | 2019-07-12 | 西南交通大学 | Highly seismic region method for tunnel construction and tunnel support structure |
-
1998
- 1998-08-28 JP JP10243767A patent/JP2000073697A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162366A (en) * | 2005-12-15 | 2007-06-28 | Okumura Corp | Timbering settlement restraining structure of tunnel |
| JP2014091992A (en) * | 2012-11-06 | 2014-05-19 | Ohbayashi Corp | Tunnel supporting reinforcement structure, and tunnel construction method using tunnel supporting reinforcement structure |
| JP2016141946A (en) * | 2015-01-30 | 2016-08-08 | 株式会社大林組 | Guide member for guiding pile, and tunnel ground support method |
| CN109707414A (en) * | 2018-12-29 | 2019-05-03 | 中铁五局集团有限公司 | A kind of adjustable grillage processing tool in tunnel |
| CN110005444A (en) * | 2019-05-05 | 2019-07-12 | 西南交通大学 | Highly seismic region method for tunnel construction and tunnel support structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20051101 |