CN110067572A - Constructing tunnel passes through goaf emergency processing method - Google Patents
Constructing tunnel passes through goaf emergency processing method Download PDFInfo
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- CN110067572A CN110067572A CN201910256778.1A CN201910256778A CN110067572A CN 110067572 A CN110067572 A CN 110067572A CN 201910256778 A CN201910256778 A CN 201910256778A CN 110067572 A CN110067572 A CN 110067572A
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- goaf
- preliminary bracing
- emergency processing
- avris portion
- processing method
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- 238000003672 processing method Methods 0.000 title claims abstract description 24
- 239000002893 slag Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000005641 tunneling Effects 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 9
- 230000006641 stabilisation Effects 0.000 claims description 8
- 238000011105 stabilization Methods 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 8
- 238000007596 consolidation process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides a kind of constructing tunnels to pass through goaf emergency processing method, it include: during using three benching tunnelling method tunnelings, in top bar arch springing bottom and/or front of tunnel heading, there are the constructions stopped in the case where goaf to face, and carry out back-pressure backfill to top bar using hole slag；Fan-shaped support frame is applied between top bar surface and top and the preliminary bracing of avris portion；Concrete guard wall is formed using concrete backfill gob collapse space at the top and avris portion preliminary bracing position of deformation；The top of limit deformation section is invaded in top bar and avris portion preliminary bracing steel arch-shelf above and behind position applies Shed-pipe Advanced Support grouting support respectively；The preliminary bracing for invading limit deformation is reinforced or replaced from the small mileage direction in tunnel；It in face and gets out of a predicament or an embarrassing situation and the advanced inspecting hole of middle ledge surface encryption setting, determines whether that there are goaf or cavities by detection；Goaf emergency processing is completed in the case where detecting and goaf or cavity being not present.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of constructing tunnel passes through goaf emergency processing side
Method.
Background technique
In the work progress in tunnel, the case where passing through coal mine gob is needed to happen occasionally, in constructing tunnel to mined out
After area causes goaf to be disclosed for, tunnel would generally deform, or even generate the safety accidents such as landslide, it is therefore desirable in tunnel
Construction carries out emergency processing in the case where encountering goaf, guarantee progress of the constructing tunnel smoothly with safety.
Summary of the invention
The present invention provides a kind of constructing tunnel and passes through goaf emergency processing method to solve the above problems.
Constructing tunnel provided by the invention passes through goaf emergency processing method, comprising the following steps: S1) using three
During rank method tunneling, in top bar arch springing bottom and/or front of tunnel heading, there are in the case where goaf, stop pair
The construction of face, and back-pressure backfill is carried out to top bar using hole slag；S2) after the soil stabilization of face, in top bar
Fan-shaped support frame is applied between surface and top and the preliminary bracing of avris portion with bracing reinforcement top and the preliminary bracing of avris portion；
S3) in the top of deformation and the drilling of avris portion preliminary bracing position and embedding concrete pumping pipe, passed through using concrete described
Pumping line backfilling goaf collapses space, forms concrete guard wall；S4 at the beginning of the top and avris portion of) invading limit deformation section in top bar
Phase supporting steel arch-shelf above and behind position applies Shed-pipe Advanced Support grouting support respectively；S5) from the small mileage direction in tunnel to invading
The preliminary bracing of limit deformation is reinforced or is replaced；S6 it) in face and gets out of a predicament or an embarrassing situation and the encryption setting of middle ledge surface is advanced visits
Hole determines whether that there are goaf or cavities by detection；It completes to adopt in the case where detecting and goaf or cavity being not present
Dead zone emergency processing.
Preferably, the step S1) use hole slag to carry out back-pressure backfill to top bar, comprising: it will be got out of a predicament or an embarrassing situation using hole slag
All covering is extremely flushed with top bar surface with middle step；By the hole slag from end of getting out of a predicament or an embarrassing situation backwards to three step directions with predetermined
The gradient carries out slope backfill.
Preferably, the step S2) fan-shaped support is applied between top bar surface and top and the preliminary bracing of avris portion
Frame, comprising: apply crossbeam along top bar edge；It is applied between the crossbeam center and top and the preliminary bracing of avris portion
Make stringer；The stringer two sides symmetrically apply multipair inclined shore between the crossbeam and top and the preliminary bracing of avris portion
Beam.
Preferably, using crossbeam described in I20 section steel manufacture, stringer and inclined shore beam.
Preferably, the step S3) described in collapse space include: apart from top and avris portion initial stage for backfilling goaf
It is backfilled in supporting predetermined distance range, backfill height is more than or equal to tunnel vault height.
Preferably, the step S4) above top and the avris portion preliminary bracing steel arch-shelf that top bar invades limit deformation section
Apply Shed-pipe Advanced Support grouting support respectively with rear position, comprising: at the top and avris portion preliminary bracing steel arch-shelf that need to be reinforced
Above and behind position is drilled with injected hole and installs Grouting Pipe；Tube shed grouting is carried out by Grouting Pipe to reinforce the top and side
Side preliminary bracing top country rock.
Preferably, the injected hole and Grouting Pipe and vault are arranged in predetermined angular.
Preferably, the step S5) the preliminary bracing arch for invading limit deformation is reinforced from the small mileage direction in tunnel
Or displacement, comprising: reinforce or replace first the deformation arch of tunnel-side, then reinforce or replace the top and avris portion initial stage
The vault of supporting, and reinforced or replaced in the way of by Pin and segmentation.
Preferably, the step S6) further include: detecting there are in the case where goaf or cavity, using ductule
Radial grouting carries out Concrete Filled；It is detected again, until detecting there is no goaf or cavity, completes goaf and answer
Anxious processing.
Constructing tunnel provided by the invention passes through goaf emergency processing method, carries out back-pressure backfill to top bar first,
Ensure the stabilization of the face range soil body, and prevent the further deformation of preliminary bracing structure, and is grasped for subsequent reinforcing
Offer workbench is provided；Secondly fan-shaped support frame is applied between top bar surface and top and the preliminary bracing of avris portion to support
Reinforce top and the preliminary bracing of avris portion, prevent the further deformation of the top and the preliminary bracing of avris portion, also for the later period at
Safety operation space is reserved at the top and the preliminary bracing of avris portion for managing deformation；Reuse concrete backfill gob collapse
Space forms concrete guard wall, to be filled support to the gob collapse space, and infiltrates through soil layer around, enhances
The stability of surrounding soil；The top of limit deformation section is invaded in top bar later and avris portion preliminary bracing position applies respectively
Shed-pipe Advanced Support grouting support carries out consolidation process with the loose wall rock mechanism to the top and avris portion preliminary bracing top,
Guarantee the safety at the top and the preliminary bracing of avris portion；The preliminary bracing for invading limit deformation is carried out from the small mileage direction in tunnel
It reinforces or replaces, with the safety for ensuring constructing tunnel and using；In face and get out of a predicament or an embarrassing situation super with the encryption setting of middle ledge surface
Preceding inspecting hole determines whether that there are goaf or cavities by detection；Finally detecting the situation there is no goaf or cavity
Lower completion goaf emergency processing, it is ensured that the safety that constructing tunnel and later period use.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is that the constructing tunnel of embodiment according to the present invention passes through the step flow chart of goaf emergency processing method；
Fig. 2 is the tunnel that the constructing tunnel of embodiment according to the present invention passes through that back-pressure backfills in the emergency processing method of goaf
The skiagraph in road；
Fig. 3 is that the constructing tunnel of embodiment according to the present invention passes through in the emergency processing method of goaf and applies fan-shaped support
The cross-sectional view in the tunnel of frame；
Fig. 4 is that the constructing tunnel of embodiment according to the present invention passes through fan-shaped support frame in the emergency processing method of goaf
Structural schematic diagram；
Fig. 5 is that the constructing tunnel of embodiment according to the present invention passes through backfilling goaf in the emergency processing method of goaf
The cross-sectional view in tunnel；And
Fig. 6 is that the constructing tunnel of embodiment according to the present invention passes through in the emergency processing method of goaf and applies Shed-pipe Advanced Support
The skiagraph in the tunnel of grouting support.
Description of symbols
1 top bar, 2 face
3 hole slag, 4 top and the preliminary bracing of avris portion
56 concrete guard walls of fan-shaped support frame
Step 8 is got out of a predicament or an embarrassing situation in 7
9 crossbeam, 10 stringer
11 inclined shore beam, 12 pumping line
13 Grouting Pipes
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
In the work progress in tunnel, the case where passing through coal mine gob is needed to happen occasionally, in constructing tunnel to mined out
After area causes goaf to be disclosed for, tunnel would generally deform, or even generate the safety accidents such as landslide, it is therefore desirable in tunnel
Construction carries out emergency processing in the case where encountering goaf, guarantee progress of the constructing tunnel smoothly with safety.
As shown in Figure 1, the present invention, which provides a kind of constructing tunnel, passes through goaf emergency processing method, comprising the following steps:
S1) during using three benching tunnelling method tunnelings, there are goafs in front of 1 arch springing bottom of top bar and/or face 2
In the case where, stop the construction to face 2, and back-pressure backfill is carried out to top bar 1 using hole slag 3；S2) to face 2
After soil stabilization, fan-shaped support frame 5 is applied between 1 surface of top bar and top and avris portion preliminary bracing 4 with bracing reinforcement
Top and avris portion preliminary bracing 4；S3) in the top of deformation and the drilling of 4 position of avris portion preliminary bracing and embedding concrete pump
Pipe is sent, space is collapsed by the pumping line backfilling goaf using concrete, forms concrete guard wall 6；S4) in top bar 1
The top and 4 steel arch-shelf above and behind position of avris portion preliminary bracing for invading limit deformation section apply Shed-pipe Advanced Support slip casting branch respectively
Shield；S5) preliminary bracing for invading limit deformation is reinforced or replaced from the small mileage direction in tunnel；S6) in face 2 and leave from office
Advanced inspecting hole is arranged in rank 8 and the encryption of 7 surface of middle step, determines whether that there are goaf or cavities by detection；It is detecting not
Goaf emergency processing is completed in the case where there are goaf or cavity.
According to the technique and scheme of the present invention, as shown in Fig. 2, carrying out step S1 first) using three benching tunnelling method tunnelings
During, there are in the case where goaf in front of 1 arch springing bottom of top bar and/or face 2, stop to face 2
Construction, and back-pressure backfill is carried out to top bar 1 using hole slag 3.
In the 1 arch springing bottom of top bar in the tunnel there are in the case where goaf, top bar 1 arch springing in tunnel easily occurs heavy
It falls into, so as to cause the deformation of Tunnel, the construction to face 2 need to be stopped immediately, by in-cavity construction personnel and equipment
It all withdraws, to guarantee the safety of construction personnel and prevent the further destruction in tunnel；The range in usual goaf is larger, is not easy
It verifies completely, in the 1 arch springing bottom of top bar in the tunnel there are in the case where goaf, the front of tunnel tunnel face 2 is also same
There are goafs for sample, and the deformation of the further deformation and face 2 of Tunnel structure, right using hole slag 3 in order to prevent
Top bar 1 carries out back-pressure backfill.
A kind of embodiment according to the present invention, the step S1) use hole slag 3 to carry out back-pressure backfill, packet to top bar 1
Include: using hole slag 3 will get out of a predicament or an embarrassing situation 8 and middle step 7 all covering to being flushed with 1 surface of top bar；The hole slag 3 is got out of a predicament or an embarrassing situation certainly
8 ends carry out slope backfill backwards to three step directions with predetermined slope, and back-pressure backfill can provide support for the top bar 1
Power, it is ensured that the stabilization of the 2 range soil body of face, and the further deformation of preliminary bracing structure is prevented, and add to be subsequent
Gu operation provides workbench.
Preferably, the hole slag 3 carries out slope time backwards to three step directions from 8 ends are got out of a predicament or an embarrassing situation with predetermined slope 1:1.5
It fills out, to reach preferable support effect, effective back-pressure is formed to the top bar 1 and is backfilled.
According to the technique and scheme of the present invention, as shown in figure 3, step S2) after the soil stabilization of face 2, in top bar 1
Fan-shaped support frame 5 is applied between surface and top and avris portion preliminary bracing 4 with bracing reinforcement top and the preliminary bracing of avris portion
4, the sector support frame 5 provides branch based on the surface of the top bar 1 for the top and avris portion preliminary bracing 4
Support force plays the role of reinforcing to prevent the further deformation at the top and avris portion preliminary bracing 4, is also post-processing
Safety operation space is reserved at the top and avris portion preliminary bracing 4 of deformation.
A kind of embodiment according to the present invention, as shown in figure 4, the step S2) on 1 surface of top bar and top and side
Fan-shaped support frame 5 is applied between side preliminary bracing 4, comprising: apply crossbeam 9 along 1 edge of top bar；In the crossbeam 9
Stringer 10 is applied between heart position and top and avris portion preliminary bracing 4；In the crossbeam 9 and top and the preliminary bracing of avris portion
10 two sides of stringer symmetrically apply multipair inclined shore beam 11 between 4.The crossbeam 9, stringer 10 and multipair inclined shore
Beam 11 forms fan-shaped support frame 5, to form support to the top and avris portion preliminary bracing 4.
A kind of embodiment according to the present invention, using crossbeam 9, stringer 10 described in I20 section steel manufacture and inclined shore
Beam 11.Preferably, fixed composition sector is propped up by welding for the crossbeam 9, stringer 10 and multipair inclined shore beam 11
Support 5, it is fixed, there is enough support forces, preferable support effect can be reached.
A kind of embodiment according to the present invention, it is preferable that apply one at the top and 4 surface of avris portion preliminary bracing
Ring set arch applies stringer 10 between set arch and 9 center of the crossbeam, between set arch and the crossbeam 9
10 two sides of stringer symmetrically apply multipair inclined shore beam 11, further enhance support force, at the beginning of the top and avris portion
Phase supporting 4 reaches better support effect.
According to the technique and scheme of the present invention, as shown in figure 5, S3) it is bored at the top of deformation and 4 position of avris portion preliminary bracing
Hole and embedding concrete pumping pipe collapse space by the pumping line backfilling goaf using concrete, form concrete shield
Wall 6 to be filled support to the gob collapse space, and infiltrates through soil layer around, enhances the stabilization of surrounding soil
Property.
For example, the pumping line 12 that three row's mutual spacings are 1 meter is arranged altogether, every row includes 6 pumping lines 12, to increase
Pumping efficiency reaches preferable pumping effect；By the way of intermittently pouring, incorporation is not more than cement content 4% in concrete
Accelerator or waterglass no more than 2%, effect is poured with enhancing.
A kind of embodiment according to the present invention, it includes: apart from top and avris that the backfilling goaf, which collapses space,
It is backfilled in 4 predetermined distance range of portion's preliminary bracing, backfill height is more than or equal to tunnel vault height.Preferably, pre- spacing
From being 3 meters, to form the concrete guard wall 6 of adequate thickness, with the safety for guaranteeing constructing tunnel and using；It is described encountering
In the biggish situation of the volume in goaf, when backfill height is more than spring line, pumping flyash is can be used in spring line range above
Or the materials such as medium coarse sand are backfilled, to reduce the pressure to preliminary bracing structure.
According to the technique and scheme of the present invention, as shown in fig. 6, step S4) top and the avris for limiting deformation section are invaded in top bar 1
Preliminary bracing 4 steel arch-shelf above and behind position in portion's applies Shed-pipe Advanced Support grouting support respectively, to the top and avris portion
The loose wall rock mechanism of 4 steel arch-shelf above and behind of preliminary bracing carries out consolidation process, guarantees the top and avris portion initial stage
The safety of supporting 4.
A kind of embodiment according to the present invention, it is preferable that the step S4) on the top for invading limit deformation section in top bar 1
Portion and 4 steel arch-shelf above and behind position of avris portion preliminary bracing apply Shed-pipe Advanced Support grouting support respectively, comprising: are needing to reinforce
Top and 4 steel arch-shelf above and behind position of avris portion preliminary bracing be drilled with injected hole and Grouting Pipe 13 be installed；Pass through slip casting
Pipe 13 carries out tube shed grouting to reinforce 4 top country rock of the top and the preliminary bracing of avris portion.
A kind of embodiment according to the present invention, it is preferable that the injected hole and Grouting Pipe 13 and vault are in predetermined angular
Setting, the predetermined angular can be chosen for 15 ° of outer limb, to rise to the top and 4 top country rock of avris portion preliminary bracing
Fixed function is reinforced to preferable.
So-called " invading limit " refers to that the preliminary bracing in tunnel is deformed due to the change of support force, invades Tunnel Design boundary,
Construction and use to the later period bring adverse effect, therefore according to the technique and scheme of the present invention, step S5) small mileage from tunnel
Direction is reinforced or is replaced to the preliminary bracing for invading limit deformation, with the safety for ensuring constructing tunnel and using.
A kind of embodiment according to the present invention, it is preferable that the step S5) become from the small mileage direction in tunnel to limit is invaded
The preliminary bracing arch of shape is reinforced or is replaced, comprising: reinforces or replace the deformation arch of tunnel-side, first to form foot
Enough support forces, then the top and avris portion preliminary bracing 4 are reinforced or replace, and added in the way of by Pin and segmentation
Gu or displacement, safe with guarantee construction carry out.
According to the technique and scheme of the present invention, step S6) face 2 and get out of a predicament or an embarrassing situation 8 and the encryption setting of 7 surface of middle step it is super
Preceding inspecting hole determines whether that there are goaf or cavities by detection；It is complete in the case where detecting there is no goaf or cavity
At goaf emergency processing, it is ensured that the safety that constructing tunnel and later period use.
A kind of embodiment according to the present invention, it is preferable that the step S6) further include: there are goafs detecting
Or in the case where cavity, Concrete Filled is carried out using ductule radial grouting；It is detected, is not present until detecting again
Goaf emergency processing is completed in goaf or cavity.Preferably, radial grouting is carried out using Φ 42mm ductule, it is described small to lead
Pipe will go deep into basement rock, reinforce to basement rock, prevent from disturbing loose media, abutment wall backfill in two sides is mixed because leading under in excavating
Solidifying soil depression, causes Tunnel to crack, further ensures the safety of construction.
It needs to detect the effect of slip casting simultaneously and whether quality meets construction requirement, and influence section in goaf and carry out lining cutting
Strengthening supporting is continued to monitor in the coverage of goaf.
For example, being deformed after 16 days to the vault sinking at the monitoring section K0+337 mileage in the coverage of goaf
Start to tend to mitigate, monitoring section was restrained at 15 days or so；Treatment process scheme is implemented 40 days altogether, to goaf influence area
After emergency processing one month, monitoring section horizontal convergence and Vault settlement total deformation are less than 10mm, then are able to confirm that and answer
Anxious processing has reached preferable treatment effect.
The object of the present invention is to provide a kind of constructing tunnels to pass through goaf emergency processing method, first to top bar 1 into
The backfill of row back-pressure, it is ensured that the stabilization of the 2 range soil body of face, and the further deformation of preliminary bracing structure is prevented, and be
Subsequent reinforcing operation provides workbench；Secondly fan is applied between 1 surface of top bar and top and avris portion preliminary bracing 4
Shape support frame 5 at the top of bracing reinforcement and avris portion preliminary bracing 4, with prevent the top and avris portion preliminary bracing 4 into
The deformation of one step also reserves safety operation space for the top and avris portion preliminary bracing 4 of post-processing deformation；It reuses
Concrete backfill gob collapse space forms concrete guard wall 6, to be filled support to the gob collapse space,
And soil layer around is infiltrated through, enhance the stability of surrounding soil；At the beginning of top bar invades the top and avris portion of limit deformation section later
Phase supporting steel arch-shelf above and behind position applies Shed-pipe Advanced Support grouting support respectively, to the top and avris portion initial stage branch
The loose wall rock mechanism for protecting 4 tops carries out consolidation process, guarantees the safety at the top and avris portion preliminary bracing 4；From tunnel
Small mileage direction to invade limit deformation preliminary bracing reinforced or replaced, with the safety for ensuring constructing tunnel and using；?
Face 2 and get out of a predicament or an embarrassing situation 8 and the advanced inspecting hole of 7 surface of middle step encryption setting, determine whether that there are goaf or skies by detection
Hole；Goaf emergency processing finally is completed in the case where detecting and goaf or cavity being not present, it is ensured that constructing tunnel is with after
The safety that phase uses.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (9)
1. a kind of constructing tunnel passes through goaf emergency processing method, which is characterized in that the emergency processing method includes following
Step:
S1 it) during using three benching tunnelling method tunnelings, is deposited in front of top bar (1) arch springing bottom and/or face (2)
In the case where goaf, stop the construction to face (2), and back-pressure backfill is carried out to top bar (1) using hole slag (3)；
S2 it) after the soil stabilization of face (2), is applied between top bar (1) surface and top and avris portion preliminary bracing (4)
Make fan-shaped support frame (5) with bracing reinforcement top and the preliminary bracing of avris portion (4)；
S3 logical using concrete) in the top of deformation and the drilling of avris portion preliminary bracing (4) position and embedding concrete pumping pipe
It crosses the pumping line backfilling goaf and collapses space, formed concrete guard wall (6)；
S4 the top of limit deformation section) is invaded in top bar (1) and the preliminary bracing of avris portion (4) steel arch-shelf above and behind position is distinguished
Apply Shed-pipe Advanced Support grouting support；
S5) preliminary bracing for invading limit deformation is reinforced or replaced from the small mileage direction in tunnel；
S6 it) in face (2) and gets out of a predicament or an embarrassing situation (8) and advanced inspecting hole is arranged in the encryption of middle step (7) surface, is determined whether by detection
There are goaf or cavities；Goaf emergency processing is completed in the case where detecting and goaf or cavity being not present.
2. emergency processing method according to claim 1, which is characterized in that the step S1) use hole slag (3) to top bar
(1) back-pressure backfill is carried out, comprising:
It will be got out of a predicament or an embarrassing situation (8) using hole slag (3) and middle step (7) is all covered and extremely flushed with top bar (1) surface；
By the hole slag (3) get out of a predicament or an embarrassing situation certainly (8) end backwards to three step directions with predetermined slope carry out slope backfill.
3. emergency processing method according to claim 1, which is characterized in that the step S2) on top bar (1) surface and top
Fan-shaped support frame (5) are applied between portion and avris portion preliminary bracing (4), comprising:
Crossbeam (9) are applied along top bar (1) edge；
Stringer (10) are applied between the crossbeam (9) center and top and avris portion preliminary bracing (4)；
Stringer (10) two sides, which symmetrically apply, between the crossbeam (9) and top and avris portion preliminary bracing (4) multipair inclines
Bearing diagonal beam (11).
4. emergency processing method according to claim 3, which is characterized in that using crossbeam (9) described in I20 section steel manufacture, indulge
Beam (10) and inclined shore beam (11).
5. emergency processing method according to claim 1, which is characterized in that the step S3) described in backfilling goaf collapse
Sunken space includes:
It is backfilled in top and the preliminary bracing of avris portion (4) predetermined distance range, backfill height is more than or equal to tunnel
Spring of arch.
6. emergency processing method according to claim 1, which is characterized in that the step S4) top bar (1) invade limit deformation
The top and the preliminary bracing of avris portion (4) steel arch-shelf above and behind position of section apply Shed-pipe Advanced Support grouting support respectively, comprising:
Injected hole is drilled at the top and the preliminary bracing of avris portion (4) steel arch-shelf above and behind position that need to be reinforced and slip casting is installed
It manages (13)；
Tube shed grouting is carried out by Grouting Pipe (13) to reinforce the top and the preliminary bracing of avris portion (4) top country rock.
7. emergency processing method according to claim 6, which is characterized in that the injected hole and Grouting Pipe (13) are in vault
Predetermined angular setting.
8. emergency processing method according to claim 1, which is characterized in that the step S5) from the small mileage direction in tunnel
The preliminary bracing arch for invading limit deformation is reinforced or is replaced, comprising:
The deformation arch of tunnel-side is reinforced or replaced first, then reinforces or replace the top and avris portion preliminary bracing (4)
Vault, and reinforced or replaced in the way of by Pin and segmentation.
9. emergency processing method according to claim 1, which is characterized in that the step S6) further include: detecting presence
In the case where goaf or cavity, Concrete Filled is carried out using ductule radial grouting；It is detected again, until detecting
There is no goaf or cavities, complete goaf emergency processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110821513A (en) * | 2019-10-24 | 2020-02-21 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN112814736A (en) * | 2020-12-31 | 2021-05-18 | 新疆北新路桥集团股份有限公司 | Tunnel collapse treatment method |
| CN116950687A (en) * | 2023-09-20 | 2023-10-27 | 太原西北二环高速公路发展有限公司 | Tunnel supporting system penetrating through multilayer goaf and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110821513A (en) * | 2019-10-24 | 2020-02-21 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN110821513B (en) * | 2019-10-24 | 2021-07-06 | 中铁十八局集团有限公司 | Construction method for performing advanced grouting and supporting on tunnel local collapse |
| CN112814736A (en) * | 2020-12-31 | 2021-05-18 | 新疆北新路桥集团股份有限公司 | Tunnel collapse treatment method |
| CN112814736B (en) * | 2020-12-31 | 2023-01-31 | 新疆北新路桥集团股份有限公司 | Tunnel collapse treatment method |
| CN116950687A (en) * | 2023-09-20 | 2023-10-27 | 太原西北二环高速公路发展有限公司 | Tunnel supporting system penetrating through multilayer goaf and construction method thereof |
| CN116950687B (en) * | 2023-09-20 | 2023-12-01 | 太原西北二环高速公路发展有限公司 | Tunnel supporting system penetrating through multilayer goaf and construction method thereof |
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