CN108425680A - A kind of shield driving surface collapse pushes away processing method and its supporting construction again - Google Patents
A kind of shield driving surface collapse pushes away processing method and its supporting construction again Download PDFInfo
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- CN108425680A CN108425680A CN201810269758.3A CN201810269758A CN108425680A CN 108425680 A CN108425680 A CN 108425680A CN 201810269758 A CN201810269758 A CN 201810269758A CN 108425680 A CN108425680 A CN 108425680A
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- Prior art keywords
- shield
- poverty
- rid
- control
- dregs
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Classifications
-
- 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
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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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
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
-
- 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- 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
The invention discloses a kind of shield driving surface collapses to push away processing method again, includes the following steps：(1) reinforcing of shield machine surrounding formations and precipitation；(2) dregs cleaning, maintenance of equipment in hole；(3) shield machine gets rid of poverty and takes measures after getting rid of poverty；(4) remaining section working measure is worn under shield machine.And a kind of shield driving surface collapse pushes away supporting construction again, including before being arranged in rows in cutter head of shield machine, shield body both sides and the occlusion element stake at shield tail section of jurisdiction, it is perfused with the chemical grout for blocking sealing in the plain stake bottom of occlusion and the gap of shield tail tunnel top, the both sides of the cutter head of shield machine and shield body offer several dewatering wells with described be engaged between element stake.The present invention is intended to provide a kind of shield driving surface collapse pushes away processing method and its supporting construction again, safety, quickly cleaning can be carried out to collapsing dregs, convenient for being safeguarded to the equipment that sand is buried, and subsequent construction environment is optimized, it is ensured that the safety and quality of construction.
Description
Technical field
The present invention relates to constructing metro tunnel technical field, specifically a kind of shield driving surface collapse pushes away processing side again
Method and its supporting construction.
Background technology
Subway shield tunnel construction control is material risk source, if Suporting structure maintenance is not in place, execute-in-place is improper, together
When it is closer apart from river, when river level goes up, level of ground water is excessively high, then it is existing easily to occur Sand in Shield Construction Method Used
As causing the accident of gushing.
Occur Sand suddenly in subway sectional tunnel driving to be unable to control, execute-in-place driver and maintenance staff start
Emergent screw conveyor back brake door closing system, but still screw conveyor late gate cannot be closed, so as to cause surface collapse and
Shield machine is buried；If cannot ground-to-ground face collapses accident and carries out processing and restore follow-up driving as early as possible in time, can serious shadow
It rings duration control and causes heavy losses to engineering.
Invention content
For the deficiency for solving in the prior art, the purpose of the present invention is to provide a kind of shield driving surface collapses to push away place again
Reason method and its supporting construction, the equipment convenient for being buried to sand safeguard and optimized to subsequent construction environment, it is ensured that
The safety and quality of construction.
To solve the above problems, a kind of shield driving surface collapse of present invention offer pushes away processing method, including following step again
Suddenly：
S1, supporting construction progress stratum consolidation and the processing of pump drainage precipitation are applied on the periphery for being buried shield machine；
Sand in S2, cleaning tunnel is cleaned to being exposed to extraneous shield machine position after cleaning sand, and to sudden and violent
The accessory that damages for being exposed at extraneous shield machine position is nursed or is replaced, and carries out complete machine combined debugging；
S3, progress are buried the operation of getting rid of poverty of shield machine, wherein shield machine get rid of poverty get rid of poverty including screw conveyor, cutterhead is got rid of poverty
And shield body is got rid of poverty；
S4, get rid of poverty to shield machine after construction environment take dregs in post-treatment measure, including hole to arrange measure clearly and push away again
Period prevents surface subsidence measure；
S5, shield condition control is carried out to the Work sectors for not carrying out shield-tunneling construction, including follow-up boring parameter controls, goes out
The control of soil amount, grouting parameter control and pipe sheet assembling quality control.
Further, the supporting construction includes before being arranged in rows in cutter head of shield machine, shield body both sides and is located at shield tail pipe
Occlusion element stake at piece, the plain stake bottom of the occlusion are blocked in the gap of shield tail tunnel top by chemical grout slip casting；
Water level elevation and pump drainage water is before cutter head of shield machine and the both sides of shield body open up several dewatering wells under base area.
Further, carry out the screw conveyor get rid of poverty operation when include the following steps：
S3.1, start screw conveyor, and it is 1-3rpm that the speed that slowly runs, which is arranged,；
S3.2, screw conveyor is rotated forward, reversion is switched to when torque is not up to nominal torque；
If S3.3, step S3.2 can not achieve and get rid of poverty, toward the reserved valve opening injection bentonite slurry or bubble of screw conveyor
Foam mixed liquor repeats step S3.2.
Further, the cutterhead gets rid of poverty including normal operating mode, gets rid of poverty operation mode and lower step is got rid of poverty operation mode；
The normal operating mode includes the following steps：
Foams mix liquid pipeline on S3.4, startup cutter head panel, starts cutterhead；
S3.5, setting cutterhead slowly run speed for 0.2-0.4rpm, rotate forward cutterhead and simultaneously observe torque, if torque obviously increases
Control can be raised speed greatly between 0.9-1.1rpm；
S3.6, reversing mode is switched to, observes cutter head torque, accelerate to get rid of poverty if torque significantly increases to may be selected to raise speed；
Then switch to, using getting rid of poverty operation mode, include the following steps according to normal operating mode failure of getting rid of poverty：
S3.7, propelling cylinder is shunk to 5-10mm, repeats step S3.5 and S3.6；
Then switch to get rid of poverty operation mode using lower step according to operation mode of getting rid of poverty failure of getting rid of poverty, include the following steps：
S3.8, external bentonite pipeline, the interior injection bentonite slurries of Xiang Tucang simultaneously start screw conveyor progress bentonite
The displacement of slurries and native storehouse dregs；
S3.9, when the one third of dregs replacement amount to native storehouse dregs total amount, stop dregs replacing and start cutterhead.
Further, in step S4,
The dregs measure of row clearly includes the following steps in the hole：
Mixed liquor is injected into hole by the foam line on cutter head panel when S4.1, driving, and passes through stirring rod in storehouse
Injection bentonite slurry and foam mixing liquid in Xiang Tucang；
S4.2, external flusher are rinsed Tu Cang, it is ensured that the accreting sand in native orlop portion can be sufficiently stirred；
S4.3, sand is discharged by screw conveyor, to complete the update of new and old dregs；
It is described to prevent surface subsidence measure from including the following steps：
S4.4, in shield machine central axial direction, before cutterhead and the top of shield tail is laid can also serve as the deep layer of injected hole
Monitoring point；
S4.5, deep soil variation is monitored by the deep layer monitoring point, if monitor value reaches alarming threshold value, into hole
Injection chemical grout carries out closure sealing.
Further, the unearthed amount control is using going out earth volume and unearthed weight carries out double control, according to tunneling
The volume of determining of dregs bucket carries out out earth volume control come the path increment of jack when comparing driving in journey, according to every after the completion of driving
The driving dregs amount that the dregs of endless tube piece weighs to compare between different pipe rings carries out Weight control of being unearthed.
Further, the grouting parameter control includes synchronous grouting and secondary grouting；
The slurry material that the synchronous grouting uses includes flyash, sand and bentonite, the synchronous grouting use side amount
And pressure dual control, grouting pressure control between 2.5-3.5bar, 150%-180% of slip casting side's amount control in theoretical value
Between；
The slurry material that the secondary grouting uses includes cement mortar and waterglass, and is carried out according to ground settlement report value
Secondary grouting in hole.
Further, the pipe sheet assembling quality control includes attitude of shield machine correction control, progradation control, section of jurisdiction
Type selecting controls and the control of pipe sheet assembling repetition measurement.
A kind of shield driving surface collapse pushes away supporting construction again, including before being arranged in rows in cutter head of shield machine, shield body both sides
And the occlusion element stake at shield tail section of jurisdiction, it is perfused with for sealing in the plain stake bottom of the occlusion and the gap of shield tail tunnel top
The both sides of the chemical grout of stifled sealing, the cutter head of shield machine and shield body offer several precipitation with described be engaged between plain stake
Well.
Preferably, the plain stake of the occlusion is the 800 plain stakes of@600mm occlusions of ф, the plain stake of the occlusion is laid in apart from shield
Before cutterhead in 2m, shield body both sides 1m and occlusion plain stake depth to the position of 1m above section of jurisdiction, be located at before shield cutter 2m and
Decomposed rock 0.5m in the occlusion element stake deeply at the 1m of shield body both sides.
Using above-mentioned preferred embodiment, compared with prior art, the present invention has the following advantages：
1, the scheme of the plain stake+chemical grout ejection for water plugging of occlusion+dewatering well auxiliary precipitation, program construction speed are selected
Soon, few, low to place demand, to traffic the influence of restraining factors is small；And the plain stake of occlusion being arranged can reach water-stop curtain
Effect, the precipitation in the plain stake supporting construction of occlusion, can effectively accelerate precipitation progress, and can greatly reduce precipitation and be built to periphery
The influence of object is built, the safety of surrounding building has not only been ensure that, but also accelerate precipitation speed, has reduced dewatering project amount.
2, provide it is a kind of to shield driving when surface collapse after systematization processing method so that can be to being buried in shield machine
Component carries out timely repairing and safeguards, closes spiral late gate by troubleshooting so that maintenance work can carry out safely；It provides
Method of getting rid of poverty for being buried shield machine, effectively increases fault removal efficiency；And after getting rid of poverty to shield machine and subsequent pick
Into carrying out construction environment optimization, safe construction while, ensures the construction quality reliable, effectively reduces engineering loss.
Description of the drawings
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is supporting construction plane of the present invention construction schematic diagram；
Fig. 2 is supporting construction cross-sectional view of the present invention；
Fig. 3 is that the present invention pushes away process flow schematic diagram again；
Fig. 4 is that the present invention pushes away processing method system flow block schematic illustration again；
Fig. 5 is that the present invention pushes away processing method cutterhead and gets rid of poverty processing flow schematic diagram again；
Fig. 6 is that the present invention pushes away processing method screw conveyor and gets rid of poverty processing flow schematic diagram again；
Wherein：
The plain stake of 1- occlusions, 11- deep layers monitoring point, 12- chemical grouts, 2- shield bodies, 21- cutterheads, the sections of jurisdiction 22-, 3- dewatering wells.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention will be described in detail.It should be noted that in the absence of conflict, presently filed embodiment and reality
The feature applied in mode can be combined with each other.Many details are elaborated in the following description in order to fully understand this hair
Bright, described embodiment is only some embodiments of the invention, rather than whole embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Mode shall fall within the protection scope of the present invention.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
A kind of shield driving surface collapse provided by the invention pushes away processing method again, includes the following steps：
S1, supporting construction progress stratum consolidation and the processing of pump drainage precipitation are applied on the periphery for being buried shield machine；The supporting
Structure includes before being arranged in rows in cutter head of shield machine 21,2 both sides of shield body and the occlusion element stake 1 at shield tail section of jurisdiction 22, described
Plain 1 bottom of stake of occlusion is blocked in the gap of shield tail tunnel top by 12 slip casting of chemical grout, and according to the underground water of review
Position absolute altitude and scene pumping drainage situation is before cutter head of shield machine 21 and the both sides of shield body 2 open up several dewatering wells 3.
S2, the sand in tunnel is cleared up, cleaning is carried out to the position cleared and each accessory is carried out
Judge：Be easy restore accessory make protective treatment, be not easy restore and damage accessory in the case where not influencing sand removal progress into
Row direct replacement, and carry out complete machine combined debugging；
S3, progress are buried the operation of getting rid of poverty of shield machine, wherein shield machine get rid of poverty get rid of poverty including screw conveyor, cutterhead 21 takes off
Tired and shield body 2 is got rid of poverty；
Further, carry out the screw conveyor get rid of poverty operation when include the following steps：
S3.1, start screw conveyor, and it is 1-3rpm that the speed that slowly runs, which is arranged,；
S3.2, screw conveyor is rotated forward, reversion is switched to when torque is not up to nominal torque, observation screw conveyor is turned round
Square；
If S3.3, step S3.2 can not achieve and get rid of poverty, bentonite slurry can be injected by the reserved valve opening of screw conveyor
Or foam mixing liquid, and repeat step S3.2.
Further, the cutterhead 21 gets rid of poverty including normal operating mode, gets rid of poverty operation mode and lower step is got rid of poverty operation mould
Formula；
The normal operating mode includes the following steps：
Foams mix liquid pipeline on S3.4, startup 21 panel of cutterhead, starts cutterhead 21；
S3.5, setting cutterhead 21 slowly run speed for 0.2-0.4rpm, rotate forward cutterhead 21 and simultaneously observe torque, if torque is bright
Aobvious increase can raise speed control between 0.9-1.1rpm；
S3.6, reversing mode is switched to, observes 21 torque of cutterhead, if torque realization without exception of raising speed is got rid of poverty when reversion；
Then switch to, using getting rid of poverty operation mode, include the following steps according to normal operating mode failure of getting rid of poverty：
S3.7, propelling cylinder is shunk to 5-10mm, repeat step S3.5 and S3.6 and observes 21 torque of cutterhead；
Then switch to get rid of poverty operation mode using lower step according to operation mode of getting rid of poverty failure of getting rid of poverty, include the following steps：
S3.8, external bentonite pipeline, the interior injection bentonite slurries of Xiang Tucang simultaneously start screw conveyor progress bentonite
The displacement of slurries and native storehouse dregs；
S3.9, when the one third of dregs replacement amount to native storehouse dregs total amount, stop dregs replacing and start cutterhead 21.
S4, get rid of poverty to shield machine after construction environment take dregs in post-treatment measure, including hole to arrange measure clearly and push away again
Period prevents surface subsidence measure；
Further, the dregs measure of row clearly includes the following steps in the hole：
Mixed liquor is injected into hole by the foam line on 21 panel of cutterhead when S4.1, driving, and by being stirred in storehouse
Stick injects bentonite slurry and foam mixing liquid into native storehouse；
S4.2, external flusher are rinsed Tu Cang, it is ensured that the accreting sand in native orlop portion can be sufficiently stirred；
S4.3, sand is discharged by screw conveyor, to complete the update of new and old dregs；
It is described to prevent surface subsidence measure from including the following steps：
S4.4, in shield machine central axial direction, before cutterhead 21 and the top of shield tail is laid can also serve as the depth of injected hole
Layer monitoring point 11；
S4.5, deep soil variation is monitored by the deep layer monitoring point 11, if monitor value reaches alarming threshold value, to hole
Interior injection chemical grout 12 carries out closure sealing.
S5, control management is carried out to remaining shield-tunneling construction section, including follow-up boring parameter controls, the amount of being unearthed controls,
Grouting parameter controls and pipe sheet assembling quality control.
Further, the unearthed amount control is using going out earth volume and unearthed weight carries out double control, according to tunneling
Dregs bucket determines volume come the path increment of jack when comparing driving in journey, and that every endless tube piece 22 is taken after the completion of driving reports slag
Soil weighs to compare the control situation for tunneling dregs amount between different pipe rings；If it find that going out earth volume or weight surpasses
Mark, then analyze reason and take treatment measures according to the position of driving.
Further, grouting parameter control includes synchronous grouting and secondary grouting,
The slurry material that the synchronous grouting uses includes flyash, sand and bentonite, the synchronous grouting use side amount
And pressure dual control, grouting pressure control between 2.5-3.5bar, 150%-180% of slip casting side's amount control in theoretical value
Between；
The slurry material that the secondary grouting uses includes cement mortar and waterglass, and is carried out according to ground settlement report value
Secondary grouting in hole.
Further, the assembled quality control in the section of jurisdiction 22 includes attitude of shield machine correction control, progradation control, pipe
Piece type selecting controls and the control of pipe sheet assembling repetition measurement.
A kind of shield driving surface collapse provided by the invention pushes away supporting construction again, including is arranged in rows in cutter head of shield machine
Before 21,2 both sides of shield body and the occlusion element stake 1 at shield tail section of jurisdiction 22, plain 1 bottom of stake of occlusion and shield tail tunnel top
It is perfused with the chemical grout 12 for blocking sealing in gap, the both sides of the cutter head of shield machine 21 and shield body 2 are engaged with described
Several dewatering wells 3 are offered between plain stake 1.
Preferably, the plain stake 1 of the occlusion is the 800 plain stakes of@600mm occlusions of ф, the occlusion element stake 1 is laid in apart from shield
Before structure cutterhead 21 in 2m, 2 both sides 1m of shield body and plain 1 depth of stake to the position of 22 top 1m of section of jurisdiction of occlusion, it is located at apart from shield knife
Decomposed rock 0.5m in the occlusion element stake 1 deeply before disk 21 at 2 both sides 1m of 2m and shield body.
Technical scheme of the present invention is further described in detail with reference to specific embodiments and the drawings：
Embodiment 1
To ensure that Sand is not occurring, the mesh that sand, Suporting structure overhaul inside cleaning shield machine is completed
Ground, shield ground, which reinforces, need to play the effect of water-stop curtain, and consider and accelerate construction progress, reduce influence to traffic,
The factors such as collapse position fill concrete, the road surface structare layer collapsed provide a kind of supporting construction in the present embodiment, using occlusion
12 ejections for water plugging of plain stake 1+ chemical grouts+dewatering well 3 assists the scheme of precipitation.Specific implementation is as described below：
800@600mm occlusion elements of a row ф are respectively laid at the position of 2 both sides 1m of 2m before cutter head of shield machine 21 and shield body
Stake 1 is engaged plain stake 1 and enters middle decomposed rock 0.5m, to have the function that water-stop curtain.The precipitation in occlusion 1 building enclosure of plain stake, can
Effectively to accelerate precipitation progress, and influence of the precipitation to surrounding building can be greatly reduced, both ensure that surrounding building
Safety, and accelerate precipitation speed, reduce dewatering project amount.
One row ф, 800@600mm are set after shield tail at the 2nd, 3 endless tube pieces 22 and are engaged plain stake 1, are engaged 1 depth of plain stake to pipe
22 top 1m of piece (can be adjusted) when construction according to practical drilling depth.
Used in plain 1 bottom of stake of occlusion and the interstice coverage of shield tail tunnel top spacing for the chemical grout 12 of 1000mm into
Row slip casting blocks sealing, and back-grouting is carried out in conjunction with hole inner top section of jurisdiction 22.The slip casting depth of shield machine both sides is to middle decomposed rock
Face 0.5m.
3 mouthfuls of dewatering wells 3 are respectively arranged with being engaged between plain stake 1 in 2 both sides of shield body, and 1 mouthful of dewatering well 3, drop are arranged in 21 front of cutterhead
3 depth of well enters middle decomposed rock 2m.Dewatering well 3 arranges 7 mouthfuls altogether, and the quantity of practical pump drainage dewatering well 3 is drawn water situation according to scene
And the level of ground water absolute altitude of review is determined, the dewatering well 3 not drawn water is used as emergency power.
Embodiment 2
It is not repeated with the something in common in embodiment 1, in the present embodiment, including dregs cleaning and maintenance of equipment in hole,
It is described in detail below：
Be first begin to can be fully cleaned the sand in tunnel, the general thought of equipment reparation be according to sand removal progress,
It is from back to front that a unit carries out equipment recovery to trolley with single-unit trolley.The position cleared is carried out careful clear
It is clean, each accessory is judged, be easy restore accessory water removal, dehumidify and do protective treatment, be not easy restore and damage
Accessory direct replacement in the case where not influencing sand removal progress.The inspection of motor in shield machine is mainly checked motor whether into
Whether water, insulation are qualified.
Due to spiral late gate close after, can substantially reduce follow-up work degree of risk and save dewatering construction at
This；If spiral late gate cannot close, cause inferred has three aspects, i.e., gate is stuck by foreign matter, hydraulic system fault, is electrically
System failure.Electrical malfunction can quickly be investigated by on-line debugging, so being directed to first two reason, external can be pumped first
It stands to gate oil cylinder, attempts closed shutter.If gate is smoothly closed, illustrate that failure goes out in hydraulic system, it may be possible to oil pressure
Inadequate or oil circuit spool jams.If gate cannot still close, illustrate that floodgate sliding rail is stuck by foreign matter, can directly install additional at this time
Interim sealing plate, which shuts gate to equipment reparation, to be completed.
According to whether sand removal is completed to be that mark is divided into front and back two sections, front half section continues to equipment bridge, screw conveyor, assembly
Machine, shield body check and part is repaired；Second half section is formally repaired comprehensively, replaces the pumping plant electricity with sand removal work interference
The big component such as machine, master control room, main drive motor finally carries out integral united test joint-trial.
Replacement for second half section big component.It is that Electric Machine at Pumping Station is all buried by sand first, may intakes inside motor.
This just needs the insulation for detecting motor in time after pumping plant clears, and determines the motor needed replacing.Since pumping plant arrangement is tight
It gathers, it is minimum for the space of operation, the route for selecting motor movement in advance for motor position is needed, is cut off when necessary in the way
Crossbeam, column.Followed by master control room is all buried.It, can integral replacing master control room in view of emergency repair time is urgent.It is empty in tunnel
Between it is narrow, common hanging method is infeasible, therefore plans to remove master control room bottom bracket and left rail beam, is taken after vacating space
The mode of translation replaces master control room.Followed by the blue cylinder of assembling machine, since the respirator on blue cylinder retaining wall top lacks, sand may
Enter blue cylinder interior by hole at this, assembling machine will confirm blue cylinder damage situations at the first time after clearing, it is determined whether
Need replacing blue cylinder.It is finally the detection replacement of six main drive motors, since main drive motor water resistance is relatively poor, mud
Water is possible to enter inside motor from the gap of motor hole for hoist and torque axis observation panel.
It gushs situation for spiral, installs high molecular polymer injected system additional on the left of equipment bridge to prevent from gushing.
After the completion of repair, that is, proceed by the machine debugging of equipment.Different from repair before with single-unit
Trolley is unit, and machine debugging checks equipment during debugging as unit of individual system, replaces the member of damage
Device.
Since cutterhead 21 and screw conveyor may be stuck by closely knit sand, therefore in the debugging stage to cutterhead 21 and spiral
Conveyer rotating speed is not debugged, and can only test normally start, the row test again after cutterhead 21 and screw conveyor are got rid of poverty.
Embodiment 3
In the present embodiment, including shield machine is got rid of poverty, described in detail below：
Shield machine downtime is longer, and surface collapse is easy to cause 21 locking of cutterhead, work of the thick, fine sand in native storehouse in water
It is easy to keep native storehouse hardened under, influences cutterhead 21 and normally start；Shield body 2 is collapsed sand lateral pressure and friction force effect by outside,
The forward movement of shield body 2 will consume larger effective push, influence normal driving to a certain extent；Screw conveyor is gushed because of water burst
Sand has a large amount of sand to be deposited in screw conveyor, starts on screw conveyor screw rod and generates certain influence.
Screw conveyor is got rid of poverty：After the debugging of shield machine Coupled motion is fully completed, attempt to start screw conveyor, it first will be low
Speed rotates forward helix speed and is set as 2rpm, observing screw conveyor torque, before waiting for that torque is not up to nominal torque, closes spiral
Co-rotating mode is simultaneously switched to reversing mode by conveyer, observes screw conveyor torque.It, can if routine operation cannot normally start
Valve opening is reserved by screw conveyor and injects suitable bentonite slurry or foam mixing liquid, continues to attempt to above-mentioned positive and negative rotation switching
Operating procedure, until screw conveyor completion is got rid of poverty.
Cutterhead 21 is got rid of poverty：Before cutterhead 21 starts, 21 panel of cutterhead, 6 road foam is all started, while pre- in native storehouse partition board
It stays valve position to carry out external bentonite pipeline, starts cutterhead 21 according to normal operating mode, 21 low speed value of cutterhead is set as
0.3rpm, first co-rotating mode observe 21 torque of cutterhead, if 21 torque of cutterhead is to significantly increase trend to raise speed, 21 rotating speed of cutterhead
Control is 1rpm, after cutterhead 21 normally starts, switches to reversing mode, observes 21 torque of cutterhead, raise speed Ru without exception.Often
When rule operation cannot complete cutterhead 21 and get rid of poverty, operation mode of getting rid of poverty can be arranged in cutterhead 21, positive and negative rotation repeatedly starts cutterhead 21, sees
Examine cutter head torque；When pattern of routinely getting rid of poverty cannot still be such that cutterhead 21 normally starts, assembled hand can be organized to shrink propelling cylinder
7mm continues to start cutterhead 21 using operation mode of getting rid of poverty, and operation mode of getting rid of poverty failure is then got rid of poverty measure into lower step：By outer
Bentonite pipeline is connect, bentonite slurry is injected in Xiang Tucang, starts screw conveyor casting.Bentonite slurry is injected to protect with casting
Equilibrium state is held, while observing soil pressure case variation, waits for that native storehouse dregs replaces about one third (about 8~10 in the case of buying securities with all one's capital
Side) stop sand displacement afterwards, start cutterhead 21 or cutterhead 21 is started using operation mode of getting rid of poverty.
Shield body 2 is got rid of poverty：Start according to normal driving and promote pump, tetra- areas Zu Bian cylinder oil of A, B, C, D is adjusted to 60%
Left and right, observation oil cylinder stroke change with hinged oil cylinder stroke, such as find that oil cylinder stroke variation is less than or equal to hinged oil cylinder and extends
Amount, illustrates that shield body 2 does not move, can suitably increase oil pressure modulation 70% or so, and concrete operation step is same as above, and pays attention to the hinged oil of control
Cylinder elongation is within 130mm ranges.It is injected by 2 circumferential direction of shield body, 3,9 position reserving valves or pre-grouting hole suitable swollen
Moisten soil paste liquid, hinged oil cylinder is switched into locking mode, continues to increase propulsion oil pressure, observe oil cylinder variable elongation, arrange simultaneously
Maintenance staff observe hinged oil cylinder with the presence or absence of abnormal.
Embodiment 4
In the present embodiment, including shield machine get rid of poverty after the measure taken, it is described in detail below：
Dregs arranges clearly measure in hole：Normal driving injects mixed liquor, native orlop portion by 21 panel of cutterhead, 4 road foam pipe
Suitable bentonite slurry, foam mixing liquid are injected into native storehouse by stirring rod in storehouse, and are carried out using external flusher
Tu Cang is rinsed, it is ensured that bottom accreting sand can be sufficiently stirred in storehouse, be discharged by screw conveyor with preferable workability, suitable
Profit completes the update of new and old dregs.
Surface subsidence measure is prevented between deferring again：The positions 2m and shield tail before shield machine central axial direction, cutterhead 21
Deep layer monitoring point 11 is laid at top, and deep layer monitoring point 11 can double as injected hole away from tunnel top 3m, the deep layer monitoring point 11.
Deep soil situation of change is monitored by deep layer monitoring point 11 between shield machine is deferred again, monitoring sedimentation alarm is immediately
Carrying out static pressure grouting prevents surface subsidence.After shield machine passes through, analyzed according to ground settlement monitoring data value, such as monitoring data
Value reaches alarming value, and can carry out surface grout injection by deep layer monitoring point 11 prevents surface subsidence.
Embodiment 5
In the present embodiment, including remaining section working measure is worn under shield machine, it is described in detail below：
Sediment improvement and anti-measure of gushing：Preferably to control ground settlement, dregs should be focused in remaining section construction
Improving technology.Sediment improvement material：Foam and liquid macroimolecule material are first equipped with 4 barrels of foams and 5 barrels according to live dosage scene
Liquid macroimolecule material；Bentonite uses the high-quality bentonite of sodium base, bentonite proportion 1.05-1.1 (bentonite weight：Water=1：
10), the bentonite additive amount side 5-8.Sediment improvement based on bentonite, supplemented by foam, as indispensable prevent by high molecular polymer
It gushs materials for later use.Specific evolutionary approach is as follows：
Bentonite：Water-rich sand layer section sediment improvement mainly uses bentonite slurry, bentonite to be used by two extrusion pumps
The mode of single tube list pump, 2 inlets at the edge of cutterhead are injected by two-way pipeline, and effect one is that protection cutterhead edge is scraped
Knife, it is ensured that the digging diameter of cutterhead；Second is that increasing cohesive sediment content in dregs circle gravel, it is ensured that the workability of dregs.
High molecular polymer：It is to prevent from gushing in upper-soft lower-hard ground section major control point, the use of high molecular polymer
It mainly prevents from gushing, injection is injected by circumscribed injection pump, and the position of injection is in native storehouse.High molecular polymer root
It is required according to materials'use and on-site actual situations is adjusted macromolecule injection rate.
Boring parameter controls：Stringent control shield earth balance pressure power：The centers Tu Cang soil pressure force value is according to buried depth and soil layer feelings
Condition is set, and pressure oscillation is controlled in 0.1bar, in the construction process according to earth's surface monitoring result, when integrating tunnel completes section construction
The optimal parameter of summary puts on soft lower hard, water-rich sand layer grade shield reception soil pressure value to determine under shield machine.
According to thrust, speed, amount of being unearthed optimal control, construction parameter is adjusted according to earth's surface sedimentation value.Shield is worn not under
With geology section, previous boring parameter and earth's surface monitoring data value are can refer to, optimization is adjusted to boring parameter, ensures shield machine
Poor strata is worn under safety.
Amount of being unearthed control：Control be unearthed with square amount+progress double control of weighing, uses " stroke volume control " in the process,
I.e. according to tunneling process dregs bucket determine volume compare driving jack path increment, avoid unearthed inhomogeneities from causing out
The super side of soil；Take every ring that dregs is reported to weigh after the completion of driving to compare the control situation for tunneling dregs between different rings.If
It was found that going out earth volume or weight has exceeded situation, reason is analyzed in time, is taken appropriate measures timely place according to driving position
Reason.Densimetric analysis timely is carried out to gone out dregs in tunneling process.To the bulk density of dregs according to volume, weighing carries out
The density for calculating dregs is weighed by the proportion of comparative analysis Different Strata dregs with instructing driving to be unearthed.
Arrival Receiver Measures：When shield machine is apart from receiving terminal 100m, tissue holing through survey work.Installation receives support
Frame checks portal centre deviation, improves monitoring data declaration, arranges measurement data.Portal sealing cord, flap installation.
Stabilization zone periphery sets dewatering well.Shield machine enters the good posture of strengthening control, and the progress of tissue slip casting troop is secondary after reaching hole
Slip casting blocks portal.
Embodiment 6
In the present embodiment, including synchronous grouting and secondary grouting processing, it is described in detail below：
Injecting paste material：The slurry material that synchronous grouting uses mainly has flyash, sand and bentonite etc., presetting period：One
As be 4-6h, for the actual conditions of transportation range farther out, scene can pass through the side for increasing flyash and the less cement of bentonite
Formula obtains the longer presetting period, is adjusted with specific reference to field experiment.Synchronous grouting use side amount+pressure dual control,
And based on being controlled with pressure, based on 1, No. 4 Grouting Pipe slip casting at top, supplemented by 2, No. 3 Grouting Pipes of bottom.Grouting pressure controls
In 3.0bar or so, slip casting side's amount is the 150%~180% of theoretical value.The practical grouting amount in scene can in time be adjusted according to unearthed amount
Whole increasing synchronous grouting amount, avoids leading to ground settlement because backbreaking.
Secondary grouting material uses cement-silicate two fluid grouting, and two fluid grouting match ratio is：Waterglass：Water=2:1 (body
Product ratio), the ratio of mud=1：1 (mass ratio), water glass solution：Cement mixing liquid=1：1 (volume ratio).According to ground settlement report
Value carries out secondary grouting in hole in time, it is ensured that control ground settlement.
Emergent slip casting：If synchronous grouting and second pulp feeding still cannot effectively control ground settlement, it is taken through ground
Encrypt borehole advance grouting.
Embodiment 7
In the present embodiment, including quality control method, it is described in detail below：
Posture correction control：In shield tunneling process, posture correction should follow small correction, diligent Deviation Correction Construction theory, as possible
The disturbance to the soil body is reduced, the posture of shield machine is strictly controlled in driving, reduces the amplitude rectified a deviation every time to greatest extent, per ring
Correction amount is no more than 6mm.According to the measurement result of every ring and section of jurisdiction surrounding clearance condition, the propulsion of a ring lower to shield machine provides
Accurate foundation adjusts the elongation of each area's jack in time.Especially vertically upward rectify a deviation when more should the moment it is careful, slowly
Bottom jack oil pressure is increased, the correction amount per ring is lowered to 5mm.Shield machine operating personnel's strict implement instructs, and operates with caution,
Keeping shield machine axis and design axis, both horizontally and vertically deviation disturbs stratum with reducing within ± 20mm
It is dynamic, and create good condition for pipe sheet assembling.
Progradation controls：General tunneling process ensures that top hydraulic jack is more than bottom jack oil pressure, that is, ensures
Shield machine trend is in negative value state, keeps flat-pushing in the posture of left and right, but shield machine A area's oil cylinders of this section use and the areas C oil
Cylinder distributed quantity is equal, is higher than the top areas A oil pressure 40-60bar because tunneling the upper soft areas lower hard area section C cylinder oil.
Segment selection：Segment selection quality influences pipe sheet assembling quality, posture correction, in tunneling process segment selection by
Could it implement after driving driver and Structural Engineer both sides' sizing, type selecting, which follows, is fitted that shield tail is linear, concentric principle.It is tunneled per ring
It needs to measure gap of the shield tail after preceding and driving, and analyzes section of jurisdiction and shield tail relative position relation.
Section of jurisdiction 22 is assembled：Section of jurisdiction should be rinsed well before pipe sheet assembling, check whether cushion pad, waterstop and locating bar glue
It is firm to paste, and assembled process section of jurisdiction should be placed in the middle assembled.Prohibit fixing bolt after the completion of assembled, when shield driving 500mm carries out secondary bolt
It tightens up, section of jurisdiction is carried out after having tunneled and is tightened up three times, section of jurisdiction should carry out tightening up for four times after deviating from No. 6 trolleys.
22 repetition measurement of section of jurisdiction：Every other day carry out section of jurisdiction posture repetition measurement, with design posture and shield machine automatic measured data into
Row comparison finds that deviation is made adjustment in time.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
It is every without departing from technical solution of the present invention content, according to the technical essence of the invention to made by above example it is any modification,
Equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of shield driving surface collapse pushes away processing method again, which is characterized in that include the following steps：
S1, supporting construction progress stratum consolidation and the processing of pump drainage precipitation are applied on the periphery for being buried shield machine；
Sand in S2, cleaning tunnel is cleaned to being exposed to extraneous shield machine position after cleaning sand, and to being exposed to
The accessory that damages at extraneous shield machine position is nursed or is replaced, and carries out complete machine combined debugging；
S3, progress are buried the operation of getting rid of poverty of shield machine, wherein shield machine get rid of poverty get rid of poverty including screw conveyor, cutterhead is got rid of poverty and shield
Body is got rid of poverty；
S4, get rid of poverty to shield machine after construction environment take between dregs arranges clearly measure and defers again in post-treatment measure, including hole
Prevent surface subsidence measure；
S5, the Work sectors for not carrying out shield-tunneling construction are carried out with shield condition control, including the control of follow-up boring parameter, amount of being unearthed
Control, grouting parameter control and pipe sheet assembling quality control.
2. according to claim 1 push away processing method again, which is characterized in that the supporting construction includes being arranged in rows in shield
Before structure machine knife disk, shield body both sides and the occlusion element stake at shield tail section of jurisdiction, the plain stake bottom of the occlusion and shield tail tunnel top
Gap in blocked by chemical grout slip casting；
Water level elevation and pump drainage water is before cutter head of shield machine and the both sides of shield body open up several dewatering wells under base area.
3. according to claim 1 push away processing method again, which is characterized in that carry out the screw conveyor get rid of poverty operation when
Include the following steps：
S3.1, start screw conveyor, and it is 1-3rpm that the speed that slowly runs, which is arranged,；
S3.2, screw conveyor is rotated forward, reversion is switched to when torque is not up to nominal torque；
If S3.3, step S3.2 can not achieve and get rid of poverty, the reserved valve opening injection bentonite slurry or foam toward screw conveyor are mixed
Liquid is closed, step S3.2 is repeated.
4. according to claim 1 push away processing method again, which is characterized in that the cutterhead is got rid of poverty including routine operation mould
Formula gets rid of poverty operation mode and lower step is got rid of poverty operation mode；
The normal operating mode includes the following steps：
Foams mix liquid pipeline on S3.4, startup cutter head panel, starts cutterhead；
S3.5, setting the cutterhead speed that slowly runs are 0.2-0.4rpm, rotate forward cutterhead and simultaneously observe torque, if significantly increase can for torque
Speed-raising control is between 0.9-1.1rpm；
S3.6, reversing mode is switched to, observes cutter head torque, accelerate to get rid of poverty if torque significantly increases to may be selected to raise speed；
Then switch to, using getting rid of poverty operation mode, include the following steps according to normal operating mode failure of getting rid of poverty：
S3.7, propelling cylinder is shunk to 5-10mm, repeats step S3.5 and S3.6；
Then switch to get rid of poverty operation mode using lower step according to operation mode of getting rid of poverty failure of getting rid of poverty, include the following steps：
S3.8, external bentonite pipeline, the interior injection bentonite slurries of Xiang Tucang simultaneously start screw conveyor progress bentonite slurry
With the displacement of native storehouse dregs；
S3.9, when the one third of dregs replacement amount to native storehouse dregs total amount, stop dregs replacing and start cutterhead.
5. according to claim 1 push away processing method again, which is characterized in that in step S4,
The dregs measure of row clearly includes the following steps in the hole：
Mixed liquor is injected into hole by the foam line on cutter head panel when S4.1, driving, and by stirring rod in storehouse to soil
Bentonite slurry and foam mixing liquid are injected in storehouse；
S4.2, external flusher are rinsed Tu Cang, it is ensured that the accreting sand in native orlop portion can be sufficiently stirred；
S4.3, sand is discharged by screw conveyor, to complete the update of new and old dregs；
It is described to prevent surface subsidence measure from including the following steps：
S4.4, in shield machine central axial direction, before cutterhead and the top of shield tail lay can also serve as injected hole deep layer monitoring
Point；
S4.5, deep soil variation is monitored by the deep layer monitoring point, if monitor value reaches alarming threshold value, injected into hole
Chemical grout carries out closure sealing.
6. according to claim 1 push away processing method again, which is characterized in that the unearthed amount control using go out earth volume and
Be unearthed weight carry out double control, according in tunneling process dregs bucket determine volume come the path increment of jack when comparing driving into
Row goes out earth volume control, and the driving dregs between different pipe rings is compared according to weighing per the dregs of endless tube piece after the completion of driving
Amount carries out Weight control of being unearthed.
7. according to claim 1 push away processing method again, which is characterized in that the grouting parameter control includes synchronous grouting
And secondary grouting；
The slurry material that the synchronous grouting uses includes flyash, sand and bentonite, and the synchronous grouting use side is measured and pressure
Power double control, grouting pressure control between 2.5-3.5bar, slip casting side amount control the 150%-180% of theoretical value it
Between；
The slurry material that the secondary grouting uses includes cement mortar and waterglass, and is carried out in hole according to ground settlement report value
Secondary grouting.
8. according to claim 1 push away processing method again, which is characterized in that the pipe sheet assembling quality control includes shield
Machine posture correction control, progradation control, segment selection control and the control of pipe sheet assembling repetition measurement.
9. a kind of shield driving surface collapse pushes away supporting construction again, which is characterized in that including before being arranged in rows in cutter head of shield machine,
Shield body both sides and the occlusion element stake at shield tail section of jurisdiction, the plain stake bottom of occlusion and perfusion in the gap of shield tail tunnel top
It is useful for blocking the chemical grout of sealing, the both sides of the cutter head of shield machine and shield body are offered with described be engaged between element stake
Several dewatering wells.
10. supporting construction according to claim 9, which is characterized in that the plain stake of the occlusion is 800@600mm occlusion elements of ф
Stake, the plain stake of occlusion are laid in the 1m above 2m, shield body both sides 1m before shield cutter and the plain stake depth to section of jurisdiction of occlusion
On position, it is located at decomposed rock 0.5m in the occlusion element stake before shield cutter at 2m and shield body both sides 1m deeply.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322671A (en) * | 2018-10-24 | 2019-02-12 | 重庆大学 | A kind of trapped method of getting rid of poverty of shield cutter abrasion |
| CN109779638A (en) * | 2018-12-28 | 2019-05-21 | 中国水利水电第四工程局有限公司 | A kind of double-shielded TBM card machine processing method |
| CN111594194A (en) * | 2020-06-28 | 2020-08-28 | 中铁十四局集团大盾构工程有限公司 | Shield constructs quick-witted operating condition monitored control system |
| CN111997639A (en) * | 2020-08-22 | 2020-11-27 | 中铁隧道局集团有限公司 | Method for getting rid of trouble and reinforcing and improving geology of TBM construction tunnel bad geology section card machine |
| CN112282816A (en) * | 2020-10-28 | 2021-01-29 | 贵州理工学院 | Roadway support device capable of being deployed rapidly |
| CN113216991A (en) * | 2021-04-26 | 2021-08-06 | 中建八局轨道交通建设有限公司 | Method for reinforcing collapsed soil in front of shield cutter head |
| CN115013591A (en) * | 2022-06-24 | 2022-09-06 | 中建三局基础设施建设投资有限公司 | Locking and escaping method for muddy water pipe jacking machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322671A (en) * | 2018-10-24 | 2019-02-12 | 重庆大学 | A kind of trapped method of getting rid of poverty of shield cutter abrasion |
| CN109322671B (en) * | 2018-10-24 | 2020-05-19 | 重庆大学 | Method for getting rid of worn and trapped shield cutter |
| CN109779638A (en) * | 2018-12-28 | 2019-05-21 | 中国水利水电第四工程局有限公司 | A kind of double-shielded TBM card machine processing method |
| CN111594194A (en) * | 2020-06-28 | 2020-08-28 | 中铁十四局集团大盾构工程有限公司 | Shield constructs quick-witted operating condition monitored control system |
| CN111594194B (en) * | 2020-06-28 | 2022-07-12 | 中铁十四局集团大盾构工程有限公司 | Shield constructs quick-witted operating condition monitored control system |
| CN111997639A (en) * | 2020-08-22 | 2020-11-27 | 中铁隧道局集团有限公司 | Method for getting rid of trouble and reinforcing and improving geology of TBM construction tunnel bad geology section card machine |
| CN112282816A (en) * | 2020-10-28 | 2021-01-29 | 贵州理工学院 | Roadway support device capable of being deployed rapidly |
| CN112282816B (en) * | 2020-10-28 | 2022-08-12 | 贵州理工学院 | Roadway support device capable of being deployed rapidly |
| CN113216991A (en) * | 2021-04-26 | 2021-08-06 | 中建八局轨道交通建设有限公司 | Method for reinforcing collapsed soil in front of shield cutter head |
| CN115013591A (en) * | 2022-06-24 | 2022-09-06 | 中建三局基础设施建设投资有限公司 | Locking and escaping method for muddy water pipe jacking machine |
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