CN110439582A - Unfavorable geology method of disposal, TBM, which support to tunnel when happening suddenly unfavorable geology at boots, at TBM support boots passes through method - Google Patents
Unfavorable geology method of disposal, TBM, which support to tunnel when happening suddenly unfavorable geology at boots, at TBM support boots passes through method Download PDFInfo
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- CN110439582A CN110439582A CN201910758971.5A CN201910758971A CN110439582A CN 110439582 A CN110439582 A CN 110439582A CN 201910758971 A CN201910758971 A CN 201910758971A CN 110439582 A CN110439582 A CN 110439582A
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- tbm
- shield machine
- support boots
- cavity
- boots
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Abstract
Unfavorable geology method of disposal at a kind of TBM support boots, for handling, there are cavitys at TBM support boots, and corresponding to tunnel arch foreign side, there are concentrate issue and scattered seepage point in cavity, include: water burst ejectment step, preliminary bracing step and cavity refilling step, TBM support boots stress matrix is formed with the TBM support boots position that corresponds in cavity.The TBM support boots stress matrix of construction continues to tunnel convenient for TBM.Happen suddenly at a kind of TBM support boots unfavorable geology when driving pass through method, it include: under the support boots maintenance stretching state of shield machine, it tunnels shield machine at a slow speed and monitors cutterhead stress torque and slag discharge amount, the fltting speed of shield machine is reduced as needed, and before the tail portion of shield machine reaches at cavity, it completes to carry out preliminary treatment to cavity, so that shield machine can support cavity area at boots by TBM；Later period supporting operation is carried out to the tunnel at shield machine rear while shield machine driving.Tunnel digging efficiency is high.
Description
Technical field
The present invention relates to Shield Construction Technique fields, and in particular to unfavorable geology method of disposal, TBM at a kind of TBM support boots
Driving passes through method when burst unfavorable geology at support boots.
Background technique
Since rock moves, geological condition is complicated and changeable.In shield operation, when closing on bad geological section, need to surpass
Preceding detection bad geological section, to reduce construction risk and difficulty of construction.But forward probe bad geological section can not find whole
Unfavorable geology situation, unfavorable geology can be still caught sight of in shield tunneling process, it is passive to fall at this time, and such as disposition is not
When construction efficiency can be greatly reduced, or even cause safety accident.
In certain tunneling with TBM, there are cavitys at TBM support boots, and correspond to tunnel arch foreign side in cavity and exist
Have and concentrates issue and scattered seepage point.It is inquired, is published the article in supplementary issue of volume 39 " power station mechanical & electrical technology " in November, 2016
" the passing through method of Open TBM support boots position weak surrounding rock " describes when chamber is collapsed at the support boots position TBM there are weak surrounding rock
TBM can not be applied to solve by method, but in its application environment and there is no the situation for concentrating issue and scattered seepage point
Certainly corresponding to tunnel arch foreign side, there are concentrate the TBM of issue and scattered seepage point to pass through in cavity.
Summary of the invention
The technical problem to be solved by the present invention is to correspond to the water burst of TBM support boots position to hinder TBM construction, and reduce tunnel
Hole drivage efficiency, for this purpose, the present invention provides unfavorable geology method of disposal at a kind of TBM support boots, to have the current condition of TBM；This
Invention also provides when happening suddenly unfavorable geology at a kind of TBM support boots that driving is by method, to improve the unfavorable geology that happens suddenly at TBM support boots
When tunnel drivage efficiency.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
Unfavorable geology method of disposal at a kind of TBM support boots is designed, there are cavitys at TBM support boots for handling, and right in cavity
It should include the following steps in tunnel arch foreign side there are issue and scattered seepage point is concentrated,
Water burst ejectment step installs drainage pipeline, and the water body that the concentration issue is gushed out is introduced in tunnel；
Urgent supporting step is arranged supporting construction in the empty cavity position that corresponds to of the tunnel, is equipped in the supporting construction
The filling mouth being connected to the cavity, the filling mouth are higher than TBM and support boots position；
Cavity refilling step respectively puts into block stone, the first concrete in the cavity through the filling mouth, in the cavity
The TBM support boots position that corresponds to form TBM and support boots stress matrix, TBM support boots stress matrix includes being arranged alternatively up and down
Block stone layer, the first concrete layer.
Further, the cavity refilling step further include: the first note is set in the top of TBM support boots stress matrix
Slurry pipe, installs slip casting seal in the supporting construction, after TBM support boots stress matrix is formed, through first note
Slurry pipe injects the second concrete into the cavity.
Further, second concrete is C20 pea gravel concreten.
Further, the supporting construction includes the first arch being fixedly connected and the first reinforcing bar row.
Preferably, in the cavity refilling step, described piece of stone grain diameter is 200mm~300mm, first concrete
Half wet shotcreting including being mixed with accelerator, the first concrete are built in permeable container.
Further, in the cavity refilling step, in the process put into block stone, the first concrete in the cavity
In, the second Grouting Pipe is embedded in the middle position of the cavity.
Further, when TBM support boots stress matrix is not enough to bear support boots pressure, through second Grouting Pipe
Inject water into TBM support boots stress matrix: cement quality is than the cement slurry for 1:0.7.
Design when happening suddenly unfavorable geology at a kind of TBM support boots that driving is by method, for depositing at the support boots of TBM shield driving
In cavity, and in cavity correspond to tunnel arch foreign side there are concentrate issue and scattered seepage point bad geological section,
The following steps are included:
In the case where the support boots of shield machine maintain stretching state, tunnels shield machine with the speed not higher than 20mm/min and monitor cutterhead
Stress torque and slag discharge amount reduce the fltting speed of shield machine, so that cutterhead when cutterhead stress torque is greater than shield machine and loads
Stress torque no more than shield machine load, slag discharge amount be higher than shield machine slag tap speed when, reduce the fltting speed of shield machine,
So that slag discharge amount is not higher than the speed of slagging tap of shield machine, and before the tail portion of shield machine reaches at the cavity, use is above-mentioned
TBM supports unfavorable geology method of disposal at boots and completes to carry out preliminary treatment to the cavity, so that shield machine can pass through the TBM
Support cavity area at boots；
Later period supporting operation is carried out to the tunnel at shield machine rear while shield machine driving.
Preferably, the method for the fltting speed for reducing shield machine includes the positive fltting speed for reducing shield machine, stops
Thrust is into simultaneously original place rotating cutter-head and stops promoting and retreats cutterhead.
Further, the later period supporting operation is included in shield machine rear the second arch of installation and the second reinforcing bar row, institute
The tail portion for stating the second arch and shield machine is equipped with interval, so that second arch does not influence shield machine and retreats cutterhead.
The beneficial effect of unfavorable geology method of disposal is at a kind of TBM support boots of the present invention:
(1) influence of the water burst ejectment step for reducing water burst to construction TBM support boots stress matrix process, to accelerate TBM support boots
The building of stress matrix；Urgent supporting step is used to limit the shape of TBM support boots stress matrix, can accelerate TBM support boots stress
The speed of matrix, meanwhile, urgent supporting step is also used to firm unfavorable geology, reduces and occurs collapsing, chip off-falling pair at unfavorable geology
The influence of shield operation；The TBM support boots stress matrix of construction continues to tunnel convenient for TBM.
(2) the second concrete is injected above the TBM support boots stress matrix of cavity, for consolidating unfavorable geology, reduced not
Occurs the probability of happening of collapsing, chip off-falling at good geology.
(3) permeable container is convenient for quickly loading the first concrete, and there is the first concrete of obstruction to be washed away loss by water burst
Effect.
Tunneling when burst unfavorable geology through the beneficial effect of method at a kind of TBM support boots of the present invention is:
(1) the support boots of shield machine maintain to tunnel at a slow speed under stretching state, can support at boots poorly to avoid using TBM above-mentioned
When matter method of disposal carries out preliminary treatment to the cavity, construction tool invades the phenomenon that shield machine limit damages shield machine and sends out
It is raw；The driving at a slow speed of shield machine can reduce shield machine and work influence to unfavorable geology, reduce at unfavorable geology occur collapsing,
The occurrence probability of chip off-falling is completed to carry out preliminary treatment to the cavity before the tail portion of shield machine reaches at the cavity, with drop
Before low later period supporting operation is completed, occur collapsing, influence of the chip off-falling to later period supporting operation at unfavorable geology.
Detailed description of the invention
Fig. 1 is the cross-section diagram of bad geological section.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the schematic diagram at a kind of TBM support boots of the present invention after the completion of the water burst ejectment step of unfavorable geology method of disposal.
Fig. 4 is that the TBM of unfavorable geology method of disposal at a kind of TBM support boots of the present invention supports the signal after boots stress matrix is formed
Figure.
Fig. 5 is the concrete that a kind of TBM of the present invention supports cavity above the TBM support boots stress matrix of unfavorable geology method of disposal at boots
Backfill schematic diagram.
Fig. 6 is the longitudinally connected reinforcing schematic diagram of arch that a kind of TBM of the present invention supports unfavorable geology method of disposal at boots.
In figure, 1- Shield tunnel, 11- shield cutter, 12- shield shield, 2- collapses chamber, and 3- concentrates issue, 4- drainpipe
Road, the second Grouting Pipe of 51-, 52- block stone, the first Grouting Pipe of 61-, the second concrete of 62-, 71- I-steel, 72- arch.
Specific embodiment
Illustrate a specific embodiment of the invention with reference to the accompanying drawings and examples, but following embodiment is used only in detail
It describes the bright present invention in detail, does not limit the scope of the invention in any way.
Referring to Fig. 1-2, during shield, is caught sight of at TBM support boots and unfavorable geology occur.The unfavorable geology is sky
Chamber, and corresponding to tunnel arch foreign side, there are concentrate issue and scattered seepage point in cavity.
Embodiment 1: unfavorable geology method of disposal at a kind of TBM support boots, for handling, there are cavitys at TBM support boots, and
Corresponding to tunnel arch foreign side in cavity, there are concentrate issue and scattered seepage point, comprising the following steps:
Water burst ejectment step installs drainage pipeline, and the water body that the concentration issue is gushed out is introduced in tunnel.Referring to Fig. 3,
Pars infundibularis is set in the entrance of drainage pipeline, to collect the water flow gushed out for concentrating issue, the outlet setting of drainage pipeline exists
In tunnel, to reduce the difficulty of cavity backfill.Drainage pipeline can choose DW150 water pipe, and funnel, collection funnel are done in top
By water pipe ejectment to haunch position or haunch position hereinafter, the long 2m of water pipe single-unit, both ends welding flange push up section by section after water burst
Enter top, flange bolt connects, and the arch of lower part and supporting construction is welded and fixed.
Supporting construction is arranged in the empty cavity position that corresponds to of the tunnel, in the supporting construction in urgent supporting step
Equipped with the filling mouth being connected to the cavity, the filling mouth is higher than TBM and supports boots position；Supporting construction, which generally comprises, to be welded and fixed
The first arch and the first reinforcing bar row, can the first reinforcing bar arrange install after the first reinforcing bar row upper opening formed load mouth.
Supporting construction is used to limit the shape of TBM support boots stress matrix, can accelerate the speed of TBM support boots stress matrix, meanwhile, promptly
Supporting step is also used to firm unfavorable geology, reduces and occurs collapsing, influence of the chip off-falling to shield operation at unfavorable geology.
Cavity refilling step referring to fig. 4 respectively puts into block stone, the first concrete in the cavity through the filling mouth,
TBM support boots stress matrix is formed with the TBM support boots position that corresponds in the cavity, the TBM support boots stress matrix includes upper
Under the block stone layer, the first concrete layer that are arranged alternately.Preferably, block stone grain diameter is 200mm~300mm, and the first concrete includes
Being mixed with the half wet shotcreting of accelerator, (half wet shotcreting belongs to conventional proportions, and concrete does not add water when mixing, is added in injection
Accelerator, nozzle add water injection, consolidation time 5~10 minutes), the first concrete is built in permeable container, permeable container
It can be woven bag, in general, being packed into half bag of first concrete in a textile bag can seal.Permeable container is convenient for fast
Speed loads the first concrete, and has the effect of that stopping the first concrete is washed away loss by water burst.Due to being also distributed in cavity
Scattered seepage point, after the water body of these scattered seepage point exudations penetrates into the first concrete, the first concrete curing formation first is mixed
Solidifying soil layer, needs the time due to concrete curing, so extra water can still continue downwards to penetrate into through block stone layer the of lower section
In one concrete layer, after first is concrete curing, TBM support boots stress matrix is formed.The TBM support boots stress base constructed in this way
Body continues to tunnel convenient for TBM.
Since there are gaps between block stone, and the first concrete is placed in permeable container, and the gap between block stone is simultaneously at this time
It cannot be by the first Concrete Filled, so during putting into block stone, the first concrete in the cavity, in the cavity
Middle position be embedded with the second Grouting Pipe, the second Grouting Pipe selects φ 42 to manage.When TBM support boots stress matrix is not enough to hold
When by support boots pressure, inject water into TBM support boots stress matrix through second Grouting Pipe: cement quality is 1:0.7's
Cement slurry.
Best, empty cavity space should be backfilled all.The cavity refilling step further include: referring to Fig. 5, support boots in TBM
The first Grouting Pipe is arranged in the top of stress matrix, and slip casting seal is installed in the supporting construction.Slip casting seal can be
It is formed in this way: emergency closing being carried out to free faces such as cavitys using half wet shotcreting first, stablizes unfavorable geology, is reduced bad
Geology continues a possibility that collapsing, chip off-falling；Then using the iron sheet or sheet metal of the 1mm thickness being welded in supporting construction to cavity
It is closed, forms confined space, and the first Grouting Pipe of backfill is installed.It is formed in TBM support boots stress matrix and TBM supports boots
Into after country rock, the second concrete is injected into the cavity through first Grouting Pipe, the second concrete selects C20 microlith mixed
Solidifying soil.If cavity is higher, the second concrete needs to be layered perfusion, and each influx height 1m is perfused after terminating 2 hours again every time
Next layer is perfused.It is within 2 hours the consolidation presetting period of the second concrete.
Embodiment 2: happen suddenly at a kind of TBM support boots unfavorable geology when driving by method, the support boots for TBM shield driving
There are cavitys at place, and corresponding to tunnel arch foreign side, there are the unfavorable geologies for concentrating issue and scattered seepage point in cavity
Section, comprising the following steps:
In the case where the support boots of shield machine (selection φ 9030mm open type hard rock mole) maintain stretching state, make shield machine with not high
It is tunneled in the speed of 20mm/min and monitors cutterhead stress torque and slag discharge amount.In this field, in this example, cutter head of shield machine revolving speed
In 2rpm/min, fltting speed cannot be greater than 20mm/min for control.Cutterhead stress torque can by observe Main motor current,
When the Main motor current of this type shield machine is lower than within 350A, cutterhead peak torque does not exceed 3000kNm.Slag discharge amount can be seen
The dregs conveyer of shield machine is examined, dregs conveyer is driven by hydraulic motor, the hydraulic system pressure average value of dregs conveyer
120bar cannot be greater than.If the hydraulic system of dregs conveyer be higher than 120bar, it is necessary to stop promote pirouette cutterhead or to
Cutterhead is retreated, the pressure of slagging tap of dregs conveyer is reduced.
When cutterhead stress torque is greater than shield machine and loads, the fltting speed of shield machine is reduced, so that cutterhead stress torque
No more than shield machine load, slag discharge amount be higher than shield machine slag tap speed when, the fltting speed of shield machine is reduced, so as to slag tap
Amount is not higher than the speed of slagging tap of shield machine, and the method for reducing the fltting speed of shield machine includes the positive propulsion speed for reducing shield machine
Degree stops promoting simultaneously original place rotating cutter-head and stops promoting and retreat cutterhead.In use, being according to face country rock situation determination
No stopping cutterhead rotation.During preliminary bracing, if collapsing and breaking phenomenon occurs in face, cutterhead card machine risk does not allow when larger
It shuts down, the rotation of cutterhead original place.If only there is chip off-falling phenomenon without collapsing risk in face, per half an hour original place rotating cutter-head 1 time, directly
The quantity of slag on to belt stops when less.
And before the tail portion of shield machine reaches at cavity, using unfavorable geology method of disposal at the TBM support boots in embodiment 1
It completes to carry out preliminary treatment to the cavity, so that shield machine can support cavity area at boots by the TBM；
Preliminary bracing operation is carried out to the tunnel at shield machine rear while shield machine driving.In general, preliminary bracing
Operation is included in shield machine rear and installs the second arch and the second reinforcing bar row.Between the tail portion of the second arch and shield machine is equipped with
Every in the present embodiment, the tail portion interval of the second arch and shield machine is set as 400mm, in case of emergency to need to retreat cutterhead
Or when tool changing retrogressing cutterhead, the second arch does not influence shield machine and retreats cutterhead.
Preliminary bracing need to be carried out immediately following driving, and Bracing Process is fast, and arch is cyclic rapidly, the synchronous follow-up of spray concrete closing.Just
Phase supporting mainly includes reinforcing bar row, arch, anchor pole and gunite concrete, and just branch is completed before backfilling slip casting, each process construction peace
It arranges as follows:
1, reinforcing bar is arranged.Since single cycle drilling depth is shorter, it is too long that the larger reinforcing bar of intensity arranges the difficult to install and used time, therefore the section is main
Usingφ14, L=3m reinforcing bar is arranged, and is completely filled in whole slots, and reinforcing bar arranges adjacent two hole length and is staggered 1m or more, prevents flush disconnection
Top unstability, reinforcing bar row need to be in arch firm welding.
2, anchor pole.Anchor pole need to apply position according to the determination of live country rock situation at this, and broken step on does not beat anchor pole at chamber, prevent
Disturb rock mass.Anchor pole applies predominantly country rock and completely locates as arch frame lock foot, length 3m, circumferential spacing 1m, longitudinal pitch according to
Arch determines that anchor pole need to be in arch firm welding.
3, steel arch-shelf.The section is alternately installed using HW150/HW100 shaped steel arch, arch spacing 0.45m, except normal vertical
To outside dowel, reinforcing bar row, anchor pole welding, it need to also increase stull between adjacent arch, stull uses I14 I-steel, horizontal
It is mounted at the web of adjacent arch, and wing plate, web firm welding, circumferential spacing 1.2m, more than inverted arch block arranges, Zong Xiangxiang
Two Pin of neighbour are installed in a staggered manner.Since main tunnel inverted arch block installation requirement is higher, arch encrypted section inverted arch block need to be cut off when installing
HW100 steelframe inverted arch block part must set lock foot anchoring stock as required before cutting off, determining to anchor can cut off in firm situation
The following arch of lock foot anchoring stock.
4, concrete is sprayed.This section of gunite concrete is both needed to spray in advance in shield tail, label C25, according to vault country rock situation 2~4
The injection of Pin arch is primary, and shield tail is not sprayed to reserved between the first Pin arch, remaining position jet thickness 15cm(is held with arch face
It is flat), inverted arch block is sprayed with upper bit, sprays concrete Ying Pingshun, guarantees support boots uniform force.It, can be straight if arch is crushed place without collapsing body
Connect and see the chamber free face that collapses, then spray head put in by reinforcing bar row gap after exposure support boots collapse it is intracavitary, to intracavitary sprayable arrive of collapsing
Free face closed, spray 5~10cm of concrete thickness.After the completion of free face closing, re-closed steel arch-shelf and reinforcing bar, which are arranged, to be formed
Support circle can not spray full, then need to install in advance and spray concrete again after iron sheet closing after 1mm as gap is larger.It is both needed to pacify before spray concrete closing
Fill Grouting Pipe.
The support boots of shield machine maintain to tunnel at a slow speed under stretching state, can be to avoid bad at using TBM above-mentioned support boots
When geologic disposal concept carries out preliminary treatment to the cavity, construction tool invades the phenomenon that shield machine limit damages shield machine and sends out
It is raw；The driving at a slow speed of shield machine can reduce shield machine and work influence to unfavorable geology, reduce at unfavorable geology occur collapsing,
The occurrence probability of chip off-falling is completed to carry out preliminary treatment to the cavity before the tail portion of shield machine reaches at the cavity, with drop
Before low later period supporting operation is completed, occur collapsing, influence of the chip off-falling to later period supporting operation at unfavorable geology.
The present invention is described in detail above in conjunction with drawings and examples, still, those of skill in the art
Member is it is understood that without departing from the purpose of the present invention, can also carry out each design parameter in above-described embodiment
Change, forms multiple specific embodiments, is common variation range of the invention, is no longer described in detail one by one herein.
Claims (10)
1. unfavorable geology method of disposal at a kind of TBM support boots, for handling, there are cavitys at TBM support boots, and corresponding in cavity
In tunnel arch foreign side, there are concentrate issue and scattered seepage point, which is characterized in that include the following steps,
Water burst ejectment step installs drainage pipeline, and the water body that the concentration issue is gushed out is introduced in tunnel；
Urgent supporting step is arranged supporting construction in the empty cavity position that corresponds to of the tunnel, is equipped in the supporting construction
The filling mouth being connected to the cavity, the filling mouth are higher than TBM and support boots position；
Cavity refilling step respectively puts into block stone, the first concrete in the cavity through the filling mouth, in the cavity
The TBM support boots position that corresponds to form TBM and support boots stress matrix, TBM support boots stress matrix includes being arranged alternatively up and down
Block stone layer, the first concrete layer.
2. unfavorable geology method of disposal at TBM support boots as described in claim 1, which is characterized in that the cavity refilling step
Further include: the first Grouting Pipe is set in the top of TBM support boots stress matrix, slip casting sealing is installed in the supporting construction
Body injects the second concrete into the cavity through first Grouting Pipe after TBM support boots stress matrix is formed.
3. unfavorable geology method of disposal at TBM as claimed in claim 2 support boots, which is characterized in that second concrete is
C20 pea gravel concreten.
4. unfavorable geology method of disposal at TBM as described in claim 1 support boots, which is characterized in that the supporting construction includes
The first arch being fixedly connected and the first reinforcing bar row.
5. unfavorable geology method of disposal at TBM support boots as described in claim 1, which is characterized in that backfill and walk in the cavity
In rapid, described piece of stone grain diameter is 200mm~300mm, and first concrete includes the half wet shotcreting for being mixed with accelerator, first
Concrete is built in permeable container.
6. unfavorable geology method of disposal at TBM support boots as claimed in claim 5, which is characterized in that backfill and walk in the cavity
In rapid, during putting into block stone, the first concrete in the cavity, second is embedded in the middle position of the cavity
Grouting Pipe.
7. unfavorable geology method of disposal at TBM support boots as claimed in claim 6, which is characterized in that when the TBM supports boots stress
When matrix is not enough to bear support boots pressure, water is injected into TBM support boots stress matrix through second Grouting Pipe: cementaceous
Amount is than the cement slurry for 1:0.7.
8. driving is empty for existing at the support boots of TBM shield driving by method when burst unfavorable geology at a kind of TBM support boots
Chamber, and corresponding to tunnel arch foreign side, there are the bad geological sections for concentrating issue and scattered seepage point in cavity, it is special
Sign is, comprising the following steps:
In the case where the support boots of shield machine maintain stretching state, tunnels shield machine with the speed not higher than 20mm/min and monitor cutterhead
Stress torque and slag discharge amount reduce the fltting speed of shield machine, so that cutterhead when cutterhead stress torque is greater than shield machine and loads
Stress torque no more than shield machine load, slag discharge amount be higher than shield machine slag tap speed when, reduce the fltting speed of shield machine,
So that slag discharge amount is not higher than the speed of slagging tap of shield machine, and before the tail portion of shield machine reaches at the cavity, using such as right
It is required that unfavorable geology method of disposal is completed to carry out preliminary treatment to the cavity at the support boots of TBM described in any one of 1-7, so that
Shield machine can pass through the bad geological section；
Later period supporting operation is carried out to the tunnel at shield machine rear while shield machine driving.
9. driving passes through method when burst unfavorable geology at TBM support boots as claimed in claim 8, which is characterized in that the drop
The method of the fltting speed of low shield machine include the positive fltting speed for reducing shield machine, stop promoting and original place rotating cutter-head and
Stop promoting and retreats cutterhead.
10. driving passes through method when burst unfavorable geology at TBM support boots as claimed in claim 8, which is characterized in that after described
Phase supporting operation is included in shield machine rear and installs the second arch and the second reinforcing bar row, the tail portion of second arch and shield machine
Equipped with interval, so that second arch does not influence shield machine and retreats cutterhead.
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| CN201910758971.5A CN110439582B (en) | 2019-08-16 | 2019-08-16 | Method for disposing unfavorable geology at TBM (tunnel boring machine) supporting shoe and method for tunneling through TBM supporting shoe in sudden unfavorable geology |
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| CN201910758971.5A CN110439582B (en) | 2019-08-16 | 2019-08-16 | Method for disposing unfavorable geology at TBM (tunnel boring machine) supporting shoe and method for tunneling through TBM supporting shoe in sudden unfavorable geology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905538A (en) * | 2019-12-30 | 2020-03-24 | 中铁隧道局集团有限公司 | Construction method for TBM (Tunnel boring machine) of unfavorable geological section |
| CN111255472A (en) * | 2020-02-25 | 2020-06-09 | 山东大学 | TBM automatic escaping and supporting boot system and method for karst cave unfavorable geology |
| CN112627855A (en) * | 2020-12-04 | 2021-04-09 | 中铁十八局集团有限公司 | Simple construction method for treating collapse of primary support side roof of large-section tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110905538A (en) * | 2019-12-30 | 2020-03-24 | 中铁隧道局集团有限公司 | Construction method for TBM (Tunnel boring machine) of unfavorable geological section |
| CN111255472A (en) * | 2020-02-25 | 2020-06-09 | 山东大学 | TBM automatic escaping and supporting boot system and method for karst cave unfavorable geology |
| CN112627855A (en) * | 2020-12-04 | 2021-04-09 | 中铁十八局集团有限公司 | Simple construction method for treating collapse of primary support side roof of large-section tunnel |
| CN112627855B (en) * | 2020-12-04 | 2022-05-20 | 中铁十八局集团有限公司 | Simple construction method for treating collapse of primary support side top of large-section tunnel |
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