CN102359395A

CN102359395A - Method for plugging large-scale water-inrush burst-mud burst hole of tunnel fault

Info

Publication number: CN102359395A
Application number: CN2011102210227A
Authority: CN
Inventors: 林福地; 韩文军
Original assignee: China Railway 12th Bureau Group Co Ltd; Fourth Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC; China Railway 12th Bureau Group Co Ltd; Fourth Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
Priority date: 2011-08-03
Filing date: 2011-08-03
Publication date: 2012-02-22
Anticipated expiration: 2031-08-03
Also published as: CN102359395B

Abstract

The invention discloses a method for plugging a large-scale water-inrush burst-mud burst hole of a tunnel fault, which comprises the following steps: 1. building a temporary plugging wall on a burst-mud body slope toe on one end of a main tunnel filled by the burst mud; 2. constructing one roundabout pilot tunnel channel on the outer side of a tunnel side wall in front of the temporary plugging wall, and causing the roundabout pilot tunnel channel to bypass to reach a tunnel arch crown in front of the fault; 3. upwards building a roundabout pilot tunnel workroom on the tunnel arch crown in front of the fault; 4. downwards building mutually-interlocked vertical jet-grouting piles from the bottom of the pilot tunnel workroom to serve as a main tunnel plugging wall; and 5. opening the temporary plugging wall to clean the burst mud once. The method has the characteristics of low cost, time and labor saving and the like, and is safe and reliable. When the burst mud in the 120m of the tunnel fault is cleaned, all burst mud can be successfully cleaned after constructing for two months. Compared with the scheme in the prior art that grouting and reinforcement are carried out by sections, the method is characterized in that efficacy is improved by more than four times, cost is saved by 50%, and no unsafe accidents appear. The method can be widely applied to the projects of plugging the large-scale water-inrush burst-mud burst hole and cleaning the burst mud in the tunnel fault.

Description

A kind of tunnel extensive gushing water of tomography gushes the method for blocking of mud crevasse

Technical field

The present invention relates to construction of tunnel, be specifically related to the extensive gushing water of a kind of deep tunnel tomography and gush mud crevasse method for blocking.

Background technology

It is one of the most serious construction of tunnel geological disaster that the tunnel gushing water gushes mud.Major part occurs in karst and grows the area, also has part to occur in water-rich fault zone.It is in the constructing tunnel process that the tunnel gushing water gushes mud, and because of the tunnel excavation stress release, the underground water in the aquifer overcomes resistances such as water barrier, tomography and fissure zone under the head pressure effect, wraps up silt particle, pours in the phenomenon in tunnel suddenly, is called gushing water and gushes mud.Gush mud and can regard the attendant phenomenon of gushing water as.

Gush the mud accident in case gushing water takes place in the constructing tunnel, gush mud and follow gushing water to bury equipment, stop up the tunnel, have a strong impact on engineering construction.Gush the processing of mud section for gushing water, generally take the principle of " first desilting is implemented shutoff near crevasse, post-reinforcing through " to handle.Implement shutoff for desilting near crevasse, consider the stability and the construction safety that gush the mud body, prior art generally then adopts grouting and reinforcing 15-20m; Excavation 10-15m; Reserve 5m as block wall, carry out the grouting and reinforcing and the excavation of next circulation according to this, progressively advance to crevasse.

Existing crevasse blocking technology by circulation grouting and reinforcing excavation is applicable to that the less gushing water of scale gushes mud, and there is significant disadvantages in the crevasse shutoff for larger gushing water gushes mud:

1, gush length that mud floods length to need to implement the cycle-index of grouting and reinforcing just many, expend long in time limit;

2, it is big to gush the quantity of mud, and the volume of grouting and reinforcing is corresponding also big, the labor human and material resources.

Summary of the invention

The purpose of this invention is to provide a kind of safety, fast, effectively, the lower-cost tunnel extensive gushing water of tomography gushes mud crevasse method for blocking.

Cause extensive gushing water to gush the shortcoming that desilting is time-consuming near crevasse enforcement shutoff, take a lot of work, require great effort in order to overcome prior art; Technical scheme of the present invention is to solve like this: a kind of tunnel extensive gushing water of tomography gushes mud crevasse method for blocking, is undertaken by following step:

1) gushes the mud body toe place of gushing that the mud tomography gushed positive hole one end of mud filling at gushing water and build interim block wall;

2) construct a circuitous base tunnel passage around vault 5m place, tunnel in interim block wall the place ahead 10m, the tunnel side wall outside again to tomography the place ahead;

3) vault 5m place upwards build circuitous base tunnel service depot through circuitous base tunnel passage in the tunnel in tomography the place ahead;

4) through the vertical vertical rotary churning pile of the bottom of the base tunnel service depot mutual interlock of downward construction, as the block wall of shutoff positive hole crevasse;

5) open the disposable cleaning of interim block wall and gush mud to vertical churning block wall the place ahead.

The present invention compared with prior art, it is low, time saving and energy saving to have a cost; Characteristics such as safe and reliable gushing in mud cleaning, the crevasse shutoff work progress of tunnel L7 tomography 120m, adopt the present invention's construction only with all completion smoothly in 2 months; Compare with the scheme of taking the prior art segmentation to implement grouting and reinforcing, effect improves more than 3 times, cost savings about 50%; Any dangerous accident do not occur, can be widely used in the extensive gushing water of tunnel tomography crevasse shutoff of gushing mud and the engineering of gushing the mud cleaning.

Description of drawings

Fig. 1 is interim block wall and circuitous base tunnel plane arrangement structure sketch map;

Fig. 2 is circuitous base tunnel skiagraph;

Fig. 3 is I-I sectional drawing of Fig. 1;

Fig. 4 vertically reinforces the positive hole of shutoff for vertical churning and gushes mud crevasse floor map;

Fig. 5 is II-II sectional drawing of Fig. 4;

Fig. 6 is III-III sectional drawing of Fig. 4;

Fig. 7 is vertical churning boring plan structure sketch map.

Each numbering explanation among the figure: 1 gushing water gushes positive hole, 3 interim block walls, 4 circuitous base tunnel passages, 5 circuitous base tunnel service depots, the vertical vertical rotary churning pile of 6 mutual interlocks that mud tomography, 2 is gushed the mud filling.

The specific embodiment

Accompanying drawing is embodiments of the invention.

Below in conjunction with accompanying drawing summary of the invention is described further:

Embodiment 1

Referring to figs. 1 through shown in Figure 6, a kind of tunnel extensive gushing water of tomography gushes mud crevasse method for blocking, is undertaken by following step:

1), gushes the mud toe place of gushing that mud tomography 1 gushed positive hole 2 one ends of mud filling and build interim block wall 3 at gushing water;

2), make a circulation base tunnel passage 4 around vault 5m place, tunnel in interim block wall 3 the place ahead 10m, the construction of the tunnel side wall outside again to tomography the place ahead;

3), upwards build circuitous base tunnel service depot 5 in vault 5m place in the tunnel in tomography the place ahead through circuitous base tunnel passage 4;

4), through the vertical vertical rotary churning pile 6 of the bottom of the base tunnel service depot 5 mutual interlock of downward construction, as the block wall 6 of shutoff positive hole crevasse;

5), open interim block wall 3 disposable cleanings and gush mud to vertical churning block wall 6 the place aheads.

Fig. 5, shown in Figure 6 wherein, at the vault in positive hole 2 upwards at a distance of 5m place excavation base tunnel service depot 5 at least, be passed down through again at the bottom of the arch of base tunnel service depot 5 positive hole 2 and positive hole 2 tunnel road surfaces downwards 2m place be equipped with vertically vertical rotary churning pile 6 of mutual interlock.

Fig. 7 is the vertical vertical churning boring plan structure sketch map of mutual interlock.

The vertical vertical churning diameter 60cm of this mutual interlock, interlock 10cm each other between stake adopts equilateral triangle to arrange, each other after the interlock as the block wall of shutoff positive hole crevasse.Block wall thickness 5m, promptly along tunnel line direction 5m, the block wall width is identical with tunnel maximum excavation width.

Embodiment 2

1, earlier the positive hole of filling gush the mud body toe interim block wall of constructing, interim block wall adopts the C30 plain concrete, thickness 2m, width is identical with tunnel width;

2, make a circulation the base tunnel passage around vault 5m place, tunnel in interim block wall the place ahead 10m, the construction of tunnel side wall right side again to tomography the place ahead, and the construction working chamber that makes progress, service depot and fault boundary and tunnel vault remain with the thick weak weathering safety laccolite of 5m;

3, the vertical rotary churning pile block wall of the mutual interlock of the construction shutoff crevasse downwards in the service depot, vertical rotary churning pile are passed through and are aligned the hole behind the tunnel vault safety laccolite and gush the mud body and solidify improvement, and get into 2m under the tunnel road surface, form block wall shutoff crevasse each other after the interlock;

4, down, gushing mud and can once clear up safely and fast and put in place between block wall to the crevasse block wall temporarily in block wall protection.

Claims

1. the extensive gushing water of tunnel tomography gushes mud crevasse method for blocking, it is characterized in that being undertaken by following step:

1), gushes the mud body toe place of gushing that mud tomography (1) gushed positive hole (2) one ends of mud filling and build interim block wall (3) at gushing water;

2), at interim block wall (3) the place ahead 10m, a tunnel side wall outside construction circuitous base tunnel passage (4), around the tunnel vault to tomography the place ahead, circuitous base tunnel passage (4) exceeds vault apart from 5m;

3), upwards build circuitous base tunnel service depot (5) in vault 5m place in the tunnel in tomography the place ahead through circuitous base tunnel passage (4);

4), lay the vertical vertical rotary churning pile of mutual interlock through the bottom of base tunnel service depot (5), as the block wall (6) of shutoff positive hole crevasse;

5), open the disposable cleaning of interim block wall (3) and gush mud to vertical churning block wall (6) the place ahead.