CN104695969B - The method that shield machine is switched to soil pressure boring mode by muddy water boring mode - Google Patents
The method that shield machine is switched to soil pressure boring mode by muddy water boring mode Download PDFInfo
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- CN104695969B CN104695969B CN201510091385.1A CN201510091385A CN104695969B CN 104695969 B CN104695969 B CN 104695969B CN 201510091385 A CN201510091385 A CN 201510091385A CN 104695969 B CN104695969 B CN 104695969B
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Abstract
The method that the open shield machine of the present invention is switched to soil pressure boring mode by muddy water boring mode, comprises the following steps, in normal muddy water boring mode, the circulation of muddy water switches to machine internal bypass circulation；In soil storehouse after pressure stability, start cutter head of shield machine and start to excavate；Close spoil disposal slurry Vavle switching and just send pattern to circulation；Along with shield machine excavates, the native slag that knife cutting gets off is piled up in soil storehouse, controls the interior pressure of Tu Cang；The pulp-expelling valve opening screw machine top reserved carries out plasma discharge；When shield machine driving moment of torsion significantly increases, reduce and control driving speed, make dregs be deposited in soil storehouse, until clogging occurs in screw machine top pulp-expelling valve；Opening plasma discharge behind the plasma discharge hole on shield machine precursor median septum top, after clogging occurs in plasma discharge hole, dredging is arranged again, until completely plugged；Start screw machine, control to slag tap by shutter opening and closing, it is not necessary to shutdown is done directly muddy water boring mode and switches to soil pressure boring mode.
Description
Technical field
The present invention relates to a kind of underground engineering shield construction method, a kind of double mode shield machine is tunneled mould by muddy water
Formula switches to the method for soil pressure boring mode.
Background technology
One of shield Method important technology becoming tunnel construction.In general the kind of Suporting structure and ground
Matter condition is corresponding, and use at present is substantially monotype shield machine, it is impossible to carries out pattern switching and utilizes.Tunneling method
Being only earth pressure balanced driving or the one of which of slurry-water balance type driving, therefore shield machine adapts to ground environment, earth's surface
The ability to work of environment and distance is extremely restricted.
Particularly change greatly at the geological condition passing through area of advancing, complex location, earth's surface construction of structures, river
The complex environment such as river valley, pipeline.Easily there are the problems such as driving difficulty in the shield machine of single boring mode.
The shield machine of traditional single-mode is than choosing, adaptability teaching by type selecting, and one is selected soil pressure balance type shield
One in structure machine or slurry-water balance type shield machine；Two is to select two kinds of shield machines simultaneously, is separately in engineering, causes increasing
Oil (gas) filling device Meteorological or increase originate the expense of the great numbers such as active well.Due to the limitation of shield machine single-mode, this side
Method is once selected, and applies and just cannot change in constructing tunnel, then needs to spend the biggest warp if shield machine have to be changed
Ji cost and duration cost.Affect the construction period, increase engineering cost, construction is adversely affected.
On the basis of slurry shield abundant in compound stratum, EPB shield tunneling construction experience, in conjunction with muddy water, soil pressure
The practical experience that double mode shield machine uses, take the lead in the new ideas mode switch function proposed.But now in industry do not have
Switched to the construction method of soil pressure boring mode by muddy water boring mode or achieve and switched to muddy water by soil pressure boring mode
The construction method of boring mode.
Summary of the invention
The purpose of the present invention, is to provide a kind of shield machine to be switched to the side of soil pressure boring mode by muddy water boring mode
Method.
The present invention solves the solution of its technical problem: shield machine is switched to soil pressure driving mould by muddy water boring mode
The method of formula, comprises the following steps,
1) in normal muddy water boring mode, the circulation of muddy water is switched to machine internal bypass circulation；
2) in soil storehouse after pressure stability, start cutter head of shield machine, start to excavate；
3) row's of closedown mud valve, switches to circulation and is just sending pattern；
4) excavating along with shield machine, the native slag that knife cutting gets off is piled up in soil storehouse, is just being sent the mud of pattern by circulation
The interior pressure of Tu Cang is discharged and then controlled to slurry after Tu Cang by discharge pipeline；
5) pulp-expelling valve opening screw machine top reserved carries out plasma discharge；
6) when shield machine driving moment of torsion significantly increases, control driving speed, make dregs be deposited in soil storehouse, until spiral
There is clogging in machine top pulp-expelling valve；
7) plasma discharge behind the plasma discharge hole on shield machine precursor median septum top is opened, after there is clogging in plasma discharge hole, dredging
Arrange again, until completely plugged；
8) start screw machine, control to slag tap by shutter opening and closing, complete muddy water boring mode and switch to soil pressure boring mode.
As the further improvement of technique scheme, after step 1), the row's of closedown mud valve, open automatic pressure-maintaining mould
Formula, is in the milk in soil storehouse, opens circulation and just sending pattern after the pressure in stable soil storehouse.
As the further improvement of technique scheme, the mud flow of described automatic pressure-maintaining pattern is ground high-quality serosity
→ AV10 valve → send mud pipeline → CV1 valve → MV1 valve → Tu Cang；Circulation just sending the mud flow of pattern be ground high-quality serosity →
AV10 valve → send mud pipeline → AV1 valve → MV1 valve → Tu Cang → MV2 valve → AV2 valve → mud line → floor treatment.
As the further improvement of technique scheme, in step 2) in, the rotating speed 0.6rpm-of the cutterhead of shield machine
0.8rpm, shield machine driving speed 15mm/min-25mm/min.
As the further improvement of technique scheme, in step 6), the excavation speed of shield machine drops to 8mm/min-
11mm/min。
As the further improvement of technique scheme, in step 7), cutterhead rotating speed is 0.6rpm, and fltting speed controls
In 10mm/min, handoff procedure, effectively push drilling depth control at 500mm-700mm.
As the further improvement of technique scheme, in step 7), close MV1 valve, stop mud circulation, open spiral shell
Rotation machine gate, within the aperture of screw machine gate keeps 15%, transfers screw machine to and slags tap, until meeting till soil pressure pattern slags tap.
As the further improvement of technique scheme, in step 7), the quantity in described plasma discharge hole is 8,10 or 12,
Flos Mume distributes alternately or is circumferentially uniformly distributed in all plasma discharge holes.
The invention has the beneficial effects as follows: this inventive method makes shield machine can be done directly boring mode in tunnel to cut
Change, it is not necessary to dismount any parts.Whole switching flow completes in shield machine progradation, real by screw machine and mud circulation
The medium displacement of existing soil storehouse, easily and fast, safety；After switching to soil pressure pattern driving, muddy water function system can be used as soil pressure pattern
Large Copacity bentonite (mud) injected system of lower sediment improvement；Circulation system can be used as shutting down pressurize and air pressure and opens a position making mud
Film.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention rather than all implements
Example, those skilled in the art is not on the premise of paying creative work, it is also possible to obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Fig. 1 is the circulation schematic diagram of machine internal bypass circulation in the present invention；
Fig. 2 is the circulation schematic diagram of automatic pressure-maintaining pattern in the present invention；
Fig. 3 is the circulation schematic diagram that in the present invention, circulation is just sending pattern；
Fig. 4 is that in the present invention, the screw machine of soil pressure pattern is slagged tap schematic diagram.
Detailed description of the invention
Below with reference to embodiment and accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is carried out clearly
Chu, it is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this
Bright a part of embodiment rather than all embodiment, based on embodiments of the invention, those skilled in the art is not paying
Other embodiments obtained on the premise of creative work, belong to the scope of protection of the invention.It addition, literary composition is previously mentioned
All connection/annexations, the most singly refer to that component directly connects, and refer to add deduct by adding according to being embodied as situation
Couple auxiliary less, form more excellent draw bail.
With reference to Fig. 1～Fig. 4, the method that shield machine is switched to soil pressure boring mode by muddy water boring mode, including following step
Suddenly,
1) in normal muddy water boring mode, the circulation of muddy water is switched to machine internal bypass circulation；
2) in soil storehouse after pressure stability, start cutter head of shield machine, start to excavate；
3) row's of closedown mud valve, switches to circulation and is just sending pattern；
4) excavating along with shield machine, the native slag that knife cutting gets off is piled up in soil storehouse, is just being sent the mud of pattern by circulation
The interior pressure of Tu Cang is discharged and then controlled to slurry after Tu Cang by discharge pipeline；
5) pulp-expelling valve opening screw machine top reserved carries out plasma discharge；
6) when shield machine driving moment of torsion significantly increases, control driving speed, make dregs be deposited in soil storehouse, until spiral
There is clogging in machine top pulp-expelling valve；
7) plasma discharge behind the plasma discharge hole on shield machine precursor median septum top is opened, after there is clogging in plasma discharge hole, dredging
Arrange again, until completely plugged；
8) start screw machine 8, control to slag tap by shutter opening and closing, complete muddy water boring mode and switch to soil pressure driving mould
Formula.
Said method makes shield machine not plasma discharge under boring performance continue to excavate, and stops under sending mud tube open mode
Sending slurry, guarantee pressure stability in storehouse by relief valve and screw machine 8, it is achieved conversion, being unearthed driving until meeting soil pressure pattern
Standard.So, shield machine can be done directly boring mode switching in tunnel, it is not necessary to dismounts any parts.Whole switching stream
Journey completes in shield machine progradation, realizes soil storehouse medium by screw machine 8 and mud circulation and replaces, easily and fast, pacifies
Entirely；After switching to soil pressure pattern driving, muddy water function system can be used as the Large Copacity bentonite (mud of sediment improvement under soil pressure pattern
Slurry) injected system；Circulation system can be used as shutting down pressurize and air pressure opens a position and makes mud film.
It is further used as preferred embodiment, after step 1), the row's of closedown mud valve, open automatic pressure-maintaining pattern, past
Soil is in the milk in storehouse, opens circulation and just sending pattern after the pressure in stable soil storehouse.
Be further used as preferred embodiment, the mud flow of described automatic pressure-maintaining pattern be ground high-quality serosity 1 →
AV10 valve 2 → send mud pipeline → CV1 valve 3 → MV1 valve 4 → Tu Cang；Circulation is just sending the mud flow of pattern to be ground high-quality serosity 1
→ AV10 valve 2 → send at mud pipeline → AV1 valve 5 → MV1 valve 4 → Tu Cang → MV2 valve 6 → AV2 valve 7 → mud line → ground
Reason.
It is further used as preferred embodiment, in step 2) in, the rotating speed 0.6rpm-0.8rpm of the cutterhead of shield machine,
Shield machine driving speed 15mm/min-25mm/min.
Being further used as preferred embodiment, in step 6), the excavation speed of shield machine drops to 8mm/min-11mm/
Min, it is preferable that the excavation speed of shield machine controls at 11mm/min.
Being further used as preferred embodiment, in step 7), cutterhead rotating speed is 0.6rpm, and fltting speed controls
10mm/min, effectively pushes drilling depth and controls at 500mm-700mm in handoff procedure.
It is further used as preferred embodiment, in step 7), closes MV1 valve 4, stop mud circulation, open spiral
Machine gate, within the aperture of screw machine gate keeps 15%, transfers screw machine 8 to and slags tap, until meeting till soil pressure pattern slags tap.
Being further used as preferred embodiment, in step 7), the quantity in described plasma discharge hole is 8,10 or 12, all
Flos Mume distributes alternately or is circumferentially uniformly distributed in plasma discharge hole.
The following is a currently preferred embodiment.
(1) determine the position for pattern switching, make preparation before switching.
Preparation includes: arrange adjustment valve group, corollary equipment electromobile unit, straddle truck preparation；From ground, tunnel,
On shield machine, all of soil pressure mode element is unobstructed normally.
In current normal muddy water boring mode: circulation can switch to machine internal bypass circulation, and circulation serosity flows to: ground is excellent
Chylema liquid 1 → AV10 valve 2 → send mud pipeline → AV1 valve 5 → MV3 valve → AV2 valve 7 → mud line → ground processing equipment.See
Accompanying drawing 1；
(2) row's of closedown mud valve MV2 valve 6, opens automatic pressure-maintaining pattern, sees accompanying drawing 2, adjust otch hydraulic pressure by CV1 valve 3
To steady pressure, circulation serosity flows to: ground high-quality serosity 1 → AV10 valve 2 → send mud pipeline → CV1 valve 3 → MV1 valve 4 → soil
Storehouse；Remaining pipeline valve group closure state.
(3) opening and send mud MV1 valve 4, MV3 valve 9, circulation is just delivering to Tu Cang.See accompanying drawing 3；
Circulation is just sending pattern, and (being arranged by program, now MV2 valve 6 cuts out, and MV1 valve 4, MV3 valve 9 are opened, and deviation flow is
Just, mud flow: ground high-quality serosity 1 → AV10 valve 2 → send mud pipeline → AV1 valve 5 → MV1 valve 4 → Tu Cang → MV2 valve 6 →
AV2 valve 7 → mud line → floor treatment.Remaining pipeline valve group closure state.
(4) regulation circulation is smooth and easy, in soil storehouse after pressure stability, starts cutter head of shield machine (rotating speed 0.6rpm-0.8rpm), pick
Enter speed 15mm/min-20mm/min, open muddy water boring mode and run.Carry out advancing or according to practice of construction with above-mentioned speed
Permissive condition runs, and stablizes otch hydraulic pressure.Mechanical pressure gauge to be checked becomes with pressure (otch hydraulic pressure) fluctuation situation in storehouse
Change consistent.
If shield machine is just being located under muddy water pattern in driving, relevant preparation puts in place the most, then without standby, shutdown, adjust
Whole setup parameter.Above-mentioned (2), (3) step sequence can be omitted, and directly carry out walking sequence (4).
(5) closing MV2 valve 6, circulation just send (stopping sending slurry under sending mud tube open mode), pays close attention to pressure in storehouse
(otch hydraulic pressure) changes.
(6) the native slag that cutting is got off by cutterhead, is deposited in Tu Cang the most from lower to upper, and the mud on top is now by circulation
" Tu Cang → MV1 valve 4 → MV3 valve 9 → discharge pipeline → floor treatment " discharges.Pressure differential, shield driving is controlled by pipeline plasma discharge
Speed meets otch variation in water pressure, and undulated control is pressure in P(storehouse) ± 10kpa.
(5) open screw machine top to reserve pulp-expelling valve and carry out plasma discharge, observe: the serosity situation 1. discharged；2. CV1 valve 3 row
Slurry situation；3. P2 mouth piece pressure condition；
(6) shield machine continues forward impelling with above-mentioned speed, when driving moment of torsion significantly increases, controls driving speed and drops to
10mm/min；Until there is clogging in screw machine top pulp-expelling valve.
(7) cutterhead rotating speed 0.6rpm, fltting speed controls at 10mm/min, keeps boring mode to push ahead, and switching has
Effect advances drilling depth to control at 500mm-700mm；Open plasma discharge hole, 12 positions, shield machine precursor median septum top, plasma discharge；Work as plasma discharge
After clogging occurs in hole, dredging is arranged again, until completely plugged；Close MV1 valve 4, stop circulation, open screw machine gate, open
Within degree keeps 15%, transferring screw machine 8 to and slag tap, belt transmits dregs, sees accompanying drawing 4.Note slag specimen situation of slagging tap, until meeting
Till soil pressure pattern is slagged tap.
(8) start screw machine 8, control to slag tap by shutter opening and closing.
The most slightly starting gate, starts screw machine 8 from minimum speed.Gushing for reducing, screw machine gate intermittence is opened,
Rotating speed controls at 1rpm；Common casting direction is forward direction.Cause rotating when stopping because snapping in gravel etc., can replace into
Row " reverse ", " rotating forward ", to get rid of bulky grain thing.
When 2. adjusting screw machine 8 rotating speed, to be controlled according to pressure in storehouse.
3. support pressure controls by taking to adjust driving speed and screw machine 8 rotating speed, and should maintain cutting soil amount with
The balance of soil discharge quantity, it is to avoid backbreak.
4. for preferably reducing situation of gushing: one can be by sediment improvement realizes.Dense slurry liquid, inertia can be used to starch
Liquid and high molecular polymer etc. are with the use of as sediment improvement agent.To slag tap denseness with frequency of gushing as foundation, adjust in good time
Modifying agent injection rate.Two is that slag tap gatage, screw machine 8 rotating speed of screw machine 8 is moderate, unsuitable excessive, is gushing temporarily, is being subject to
Cleanout door flow effect, mud can entirely spray without moment in slag notch accumulation, extend the response time of operator, in order to adopt
The measure that takes reduces risk of gushing.
(9) switching operation completes, normal soil pressure boring mode, accompanying drawing 4.
2, for ensureing seriality and effectiveness, the whole handoff procedure of switching operation, can use and effectively enter at an endless tube sheet
Complete in chi, preferably the section of jurisdiction of 1.5 meters or 1.2 meters wide cuts, it is to avoid the job interruption that pipe sheet assembling brings.
It is above the better embodiment of the present invention is illustrated, but the invention is not limited to described reality
Executing example, those of ordinary skill in the art also can make all equivalent modifications on the premise of spirit of the present invention or replace
Changing, modification or the replacement of these equivalents are all contained in the application claim limited range.
Claims (8)
1. the method that shield machine is switched to soil pressure boring mode by muddy water boring mode, it is characterised in that: comprise the following steps,
1) in normal muddy water boring mode, the circulation of muddy water is switched to machine internal bypass circulation；
2) in soil storehouse after pressure stability, start cutter head of shield machine, start to excavate；
3) row's of closedown mud valve, switches to circulation and is just sending pattern；
4) excavating along with shield machine, the native slag that knife cutting gets off is piled up in soil storehouse, is just being sent the mud warp of pattern by circulation
Discharged and then control the interior pressure of Tu Cang after crossing Tu Cang by discharge pipeline；
5) pulp-expelling valve opening screw machine top reserved carries out plasma discharge；
6) when shield machine driving moment of torsion significantly increases, control driving speed, make dregs be deposited in soil storehouse, until screw machine top
There is clogging in portion's pulp-expelling valve；
7) opening plasma discharge behind the plasma discharge hole on shield machine precursor median septum top, after clogging occurs in plasma discharge hole, dredging is arranged again,
Until it is completely plugged；
8) start screw machine, control to slag tap by shutter opening and closing, complete muddy water boring mode and switch to soil pressure boring mode.
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
It is: that after step 1) the row's of closedown mud valve opens automatic pressure-maintaining pattern, is in the milk in soil storehouse, after the pressure in stable soil storehouse
Open circulation and just send pattern.
The method that shield machine the most according to claim 2 is switched to soil pressure boring mode by muddy water boring mode, its feature
It is: the mud flow of described automatic pressure-maintaining pattern is ground high-quality serosity → AV10 valve → send mud pipeline → CV1 valve → MV1 valve
→ Tu Cang；Circulation just sending the mud flow of pattern be ground high-quality serosity → AV10 valve → send mud pipeline → AV1 valve → MV1 valve →
Tu Cang → MV2 valve → AV2 valve → mud line → floor treatment.
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
It is: in step 2) in, the rotating speed 0.6rpm-0.8rpm of the cutterhead of shield machine, shield machine driving speed 15mm/min-25mm/
min。
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
Being: in step 6), the excavation speed of shield machine drops to 8mm/min-11mm/min.
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
Being: in step 7), cutterhead rotating speed is 0.6rpm, fltting speed control to effectively push in 10mm/min, handoff procedure into
Chi controls at 500mm-700mm.
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
Being: in step 7), close MV1 valve, stopping mud circulation, open screw machine gate, the aperture of screw machine gate keeps 15%
Within, transfer screw machine to and slag tap, until meeting till soil pressure pattern slags tap.
The method that shield machine the most according to claim 1 is switched to soil pressure boring mode by muddy water boring mode, its feature
Being: in step 7), the quantity in described plasma discharge hole is 8,10 or 12, and all plasma discharge holes Flos Mume distributes alternately or the most equal
Even distribution.
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Families Citing this family (5)
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| CN110397441A (en) * | 2019-06-27 | 2019-11-01 | 中交一公局第三工程有限公司 | Shield machine shuts down pressure maintaining and prevents the control method of stagnant row in sand-pebble layer |
| CN110306991B (en) * | 2019-07-25 | 2024-07-23 | 中交天和机械设备制造有限公司 | Muddy water soil pressure dual-mode shield tunneling machine |
| CN111219194B (en) * | 2020-03-20 | 2021-07-27 | 中铁隧道局集团有限公司 | Slurry/soil pressure dual-mode shield and tunneling mode conversion method thereof |
| CN113309530B (en) * | 2020-12-30 | 2023-03-28 | 中铁工程装备集团有限公司 | Multi-mode heading machine soil pressure monitoring system and working method thereof |
| CN114165245A (en) * | 2021-12-08 | 2022-03-11 | 北京市市政四建设工程有限责任公司 | Earth pressure balance and mud-water balance dual-mode shield tunneling conversion method and tunneling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0631547B2 (en) * | 1988-11-29 | 1994-04-27 | 株式会社淺沼組 | Earth pressure shield excavation method using foam solid |
| JP2973282B2 (en) * | 1995-12-28 | 1999-11-08 | 株式会社荏原製作所 | Operation mode control method for mud transport equipment in mud shield system |
| CN102230384B (en) * | 2011-07-01 | 2014-02-19 | 河海大学 | Earth pressure balance/slurry pressurization continuous switching shield construction method |
| CN202970722U (en) * | 2012-11-14 | 2013-06-05 | 广东华隧建设股份有限公司 | Double-mode shield tunneling machine |
| CN104121023B (en) * | 2014-07-02 | 2016-05-25 | 河海大学 | Testing arrangement and the method for excavation face mud film value of holding one's breath that slurry shield is with pressure while opening the cabin |
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Address after: 510220 Guangdong city of Guangzhou province Haizhuqu District Yue Xuan Street No. 81 (G-3) 1501-1512, 1604-1607 room Patentee after: Guangdong Hua Qiao construction group Limited by Share Ltd Address before: 510620 Tianhe District, Guangzhou, Tianhe Road, No. 101, Industrial Bank building, layer 9, Patentee before: China Tunnel Construction Co., Ltd. Guangdong |