CN101666231A - Shield machine warehouse entry method - Google Patents
Shield machine warehouse entry method Download PDFInfo
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- CN101666231A CN101666231A CN200910148063A CN200910148063A CN101666231A CN 101666231 A CN101666231 A CN 101666231A CN 200910148063 A CN200910148063 A CN 200910148063A CN 200910148063 A CN200910148063 A CN 200910148063A CN 101666231 A CN101666231 A CN 101666231A
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Abstract
The invention discloses a shield machine warehouse entry method, in order to solve the safe entry-departure warehouse problem of a shield machine. For realizing the propose, the invention discloses the shield machine warehouse entry method which comprises the following steps: A, the geohydrology information of a heading face of the shield machine is acquired; B, water stop reinforcement treatmentis carried out on the stratum of the heading face according to the geohydrology information; and C, constructors enter in the warehouse to work. The shield machine warehouse entry method discloses four warehouse entry methods according to the stratum of the shield machine particularly the hydrogeololgy condition of the heading face, can realize safe warehouse entry and departure under various conditions, and facilitate works such as tool changing in the warehouse and failure recovery and the like for constructors.
Description
Technical field
The present invention relates to a kind of job practices of shield machine, particularly a kind of warehouse entry method of shield machine.
Background technology
In recent years, China's shield tunnel has under water begun flourish, though domestic major diameter slurry shield has more successful engineering example, the major diameter submerged tunnel uses shield construction still to have bigger risk, and the warehouse entry operation is one of greateset risk of shield-tunneling construction.In engineering construction in the past because the accident that the warehouse entry operation occurs is more, have in addition cause many people injures and deaths in the storehouse; But construct in compound stratum, the warehouse entry operation is difficult to avoid, and therefore, how by taking corresponding measure to finish safe warehouse entry, is a difficult problem that needs to be resolved hurrily in the present shield-tunneling construction.
Summary of the invention
The objective of the invention is to disclose a kind of warehouse entry method of shield machine, to solve the problem in shield machine safety turnover storehouse.
In order to realize above purpose, the invention discloses a kind of warehouse entry method of shield machine, comprising: A, obtain the geological hydrology information of the face of shield machine; B, according to the geology hydrographic information water sealing consolidation is carried out on the stratum of face and handle; C, constructor enter and carry out operation in the storehouse.
Wherein, also comprise after operation C: ponding carries out pump drainage in to the storehouse.
Wherein, if geological hydrology information show face be in can not normal pressure from steady Fu Shui stratum, comprise before the B in operation: according to the otch ring compression in the air cushion storehouse of pressure reference value in the geology hydrographic information and shield machine, obtain the operating pressure of warehouse entry, operating pressure should be higher than otch ring compression 0.1 to 0.2bar; Operation C comprises: the constructor compresses into the storehouse with the operating pressure band, and after face was checked, the constructor began operation.
Wherein, operation C also comprises: after operation finished, the constructor entered the decompression storehouse of shield machine, delivered from godown through after the reduced pressure treatment.
Wherein, operation B comprises: strengthen the synchronous grouting amount, shutoff shield tail rear portion, section of jurisdiction be stratum Lai Shui behind; In the muddy water storehouse of shield machine, annotate high viscosity mud and form the mud film, the sealing face; To face of land slip casting, shutoff is leaked gas or is emitted the slurry passage before shield machine is shut down the face of land to be monitored and observed, and compares with the original place epiphase; Reduce the liquid level in muddy water storehouse, reduce the pressure in the air cushion storehouse of shield machine simultaneously; Observe the liquid level in muddy water storehouse and the pressure in air cushion storehouse, determine that fluctuation does not appear in liquid level and pressure.
Wherein, can not comprise full section soft stratum, last soft hard Fu Shui stratum and broken-rock zone stratum down from steady Fu Shui stratum by normal pressure.
Wherein, be in the stratum that globality is better, crevice water is not too grown if geological hydrology information shows face, operation B comprises: strengthen the synchronous grouting amount, carry out secondary supplement slip casting, and inject water shutoff material; Adjust pressure, proportioning and the injection rate of slurries; Reduce the liquid level in the muddy water storehouse of shield machine, reduce the pressure in the air cushion storehouse of shield machine simultaneously; Operation C comprises: after the release processing was carried out in the storehouse, the certain hour that ventilates in the storehouse carried out gas detecting and ventilation in the storehouse; The constructor confirms the situation of face, carries out operation then.
Wherein, if geological hydrology information shows that face is in weak Fu Shui stratum, operation B comprises: the stratum to shield machine reinforces; The effect of reinforcing is assessed; According to the mode of full section rock stratum the periphery on stratum being carried out sealing handles.
Wherein, if geological hydrology information show that described face is in can be from steady stratum, operation B comprises: after face provided enough back-pressure, the constructor entered and carries out operation in the storehouse.
Shield machine warehouse entry method of the present invention according to the shield machine stratum hydrogeological situation of face particularly, discloses four kinds of warehouse entry methods, can be implemented in the safety turnover storehouse under the various situations, work such as tool changing or fault eliminating in convenient construction personnel's the storehouse.
Description of drawings
Fig. 1 is the side cutaway view of shield machine of the present invention;
Fig. 2 is the perspective view of cutter head of shield machine of the present invention;
Fig. 3 is the elevation cross-sectional view of cutter head of shield machine of the present invention;
Fig. 4 is the perspective view in shield machine personnel pressure of the present invention storehouse;
Fig. 5 is the whole section layout in shield machine personnel pressure of the present invention storehouse;
Fig. 6 is the side structure schematic diagram in shield machine personnel pressure of the present invention storehouse;
Fig. 7 is the schematic flow sheet of shield machine belt pressure limit row warehouse entry method embodiment of the present invention;
Fig. 8 is the schematic flow sheet of shield machine peripheral water stopping limit row warehouse entry method embodiment of the present invention;
Fig. 9 is the schematic flow sheet of shield machine stratum consolidation sealing limit row warehouse entry method embodiment of the present invention;
Figure 10 is the schematic flow sheet of shield machine low voltage limit row warehouse entry method embodiment of the present invention.
Mark the following drawings mark thereon in conjunction with the accompanying drawings:
The 1-cutterhead, 2-muddy water storehouse, the square door of 3-, 4-air cushion storehouse, 5-personnel pressure storehouse, the whole shield shell of 6-, tunnel, 7-section of jurisdiction, 8-cutting knife cutter, 9-hobboing cutter cutter, 10-plasma discharge mouth, the edge-protected cutter of 11-, 12-edge doctor.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
For long tunnel apart from compound stratum, shield construction warehouse entry (personnel's pressure storehouse) the operation operation that is absolutely necessary, also being the unique channel that solves operations such as shield machine storehouse internal fault and tool changing at present, simultaneously also is the effective method of findding out the face geological hydrology.The invention discloses the warehouse entry method of 4 kinds of shield machines: band is compressed into the storehouse, open type opens a position, and stratum consolidation opens a position, low voltage limit row warehouse entry.Concrete select the sort of method to decide, as Fig. 1-shown in Figure 6 according to the situations such as geological hydrology of operative goals in the storehouse and present position.In the present invention, described " warehouse entry " all is meant and enters personnel's pressure storehouse.
1, band is pressed limit row warehouse entry method:
Band is compressed into the storehouse in the certain pressure scope, should be adapted to various stratum, can not surely reach the Fu Shui stratum certainly by normal pressure at face especially, as: full section soft stratum, last soft poor stratas such as hard Fu Shui stratum, broken-rock zone down.
2, peripheral water stopping limit row warehouse entry method:
Peripheral water stopping limit row warehouse entry is primarily aimed at face and can or adds solid from steady undisturbed formation, the stratum globality is better, under the situation that crevice water is not too grown, by in the tunnel, shield machine rear portion or whole shield shell 6 outside stratum being carried out just satisfying the normal pressure warehouse entry after sealing is handled.
3, stratum consolidation sealing limit row warehouse entry method:
In weak Fu Shui stratum, need in a large amount of storehouses operation or cut operation such as weldering, should in advance penetrating ground be reinforced the sealing processing, after solid to be added has certain intensity, with shield machine be advanced into reinforce the position in advance after, open type warehouse entry operation again.This kind mode can be shut down work for a long time, and work plane is many.
4, low voltage limit row warehouse entry method:
Low voltage limit row warehouse entry technology is based upon that band is compressed into the storehouse and the face stratum has on certain self-stability basis, still can not reach the target that normal pressure opens a position by peripheral water stopping, stop the method for underground water and good ground to come the warehouse entry operation by adding low pressure, can improve band so greatly and compress into the operating efficiency in storehouse.
Fig. 7 is the schematic flow sheet of shield machine belt pressure limit row warehouse entry method embodiment of the present invention, and as shown in Figure 7, shield machine belt pressure limit row warehouse entry method comprises:
Step S702 obtains the geological hydrology information of the face of shield machine, determines warehouse entry method:
Before carrying out the shield machine warehouse entry operation, obtain the geological hydrology information of the face of shield machine, if being in, face can not surely reach the Fu Shui stratum certainly by normal pressure, as: full section soft stratum, last soft poor stratas such as hard Fu Shui stratum, broken-rock zone down, will take band to press limit row warehouse entry method warehouse entry.
Step S704, the preparation that band is compressed into storehouse personnel and equipment:
Because band presses limit row warehouse entry that personnel and equipment are had special requirement, therefore band must carry out physical examination, theory and practice training to the warehouse entry personnel before pressing limit row warehouse entry, be equipped with the behaviour cabin doctor of specialty, and personnel's pressure chamber 5 and other relevant devices are comprehensively checked and debugged.
Step S706, band compress into determining of storehouse pressure:
According to the data such as place's hydrogeological conditions and buried depth that open a position; calculate the theoretical top water soil pressure of face and other position lateral pressure as the pressure reference value; otch ring compression when air cushion storehouse mud level is relatively stable when obtaining pressurize and shutting down determines that this band compresses into the operating pressure in storehouse.In soft stratum, for stablizing of face, band is compressed into storehouse pressure and should be advisable a little more than otch ring compression 0.1～0.2bar.
Step S708, band compress into preceding stratum, storehouse and handle, and comprising:
Step S7082 strengthens the synchronous grouting amount: after determining that band is compressed into bin location, the ring of 2～3 before shutting down is strengthened the synchronous grouting amounts, strengthen shutoff shield tail rear portion, tunnel, the section of jurisdiction 7 stratum purpose of coming water behind thereby reach.Look formation stability and permeability, grouting amount is enlarged to 2～2.5 times of theoretical grouting amount; Many simultaneously attention synchronous grouting pressure mate substantially with otch ring mud hydraulic pressure; Also can suitably adjust denseness, proportion and the time of setting etc. of mortar.
Step S7084, annotate high viscosity mud and do the mud film: owing to be that band is compressed into the storehouse in poor strata, the strong or cranny development of stratum permeability should be annotated the extraordinary mud of high viscosity and form effective mud film in muddy water storehouse 2 before opening a position, thereby set up good air pressure border, reach the purpose of sealing face.
By analysis to stratum and driving situation, judge the situation of caving in the self-stability of face or the storehouse, and, determine high viscosity mud proportioning performance and injection quantity according to the face of land situation of emitting slurry, leak gas and subside, make mud balance and viscosity all satisfy the retaining wall requirement.General mud balance is at 1.1～1.2g/cm3, and viscosity is between 50～170s, and annotating mud amount is 0.2～0.5 times (should reduce air cushion storehouse 4 liquid levels earlier before injecting, mud directly injects muddy water storehouse 2) of muddy water storehouse 2 capacity; Secondly, when air leakage is big, sawdust, husk and fiber etc. can be added, in high viscosity mud with better filling formation pore; Along with the injection of mud, and the progressively adjustment by setting pressure and rationally rotary head 1 come pressurize, thereby reach the purpose that forms good mud film.
When mud hydraulic pressure during greater than groundwater pressure, muddy water infiltrates soil by Darcy's law, form and a certain proportion of suspended particulate in soil gap, under the effect of " obstruction " and " bridge formation " effect, obtained and accumulate in the contact surface of soil and muddy water, thereby form the mud film.As time goes on, the thickness of mud film constantly increases, and the infiltration resistance strengthens gradually, and face reaches sealing effectiveness.
Step S7086, face of land slip casting shutoff is handled: occurred swelling, punctured, leak gas and emit slurry as the face of land, or slurry appears subsiding, leaks gas and emits in the face of land, should strengthen face of land settlement monitoring and observation, have ready conditions can be in the milk by the face of land, measure shutoff gas leakage such as compaction grouting or emit the slurry passage.
Step S710, band is compressed into air tight test before the storehouse:
Step S7102; face of land monitoring: after determining to shut down the warehouse entry scheme; shutting down former rings, should strengthen face of land monitoring and observation, comparing with former face of land landforms; mainly comprise absolute altitude, position, landforms etc.; emit slurry and so on if any gas leakage, then will observe its development and variation, personnel in time link up with face; finish until the warehouse entry operation, guarantee warehouse entry process safety.
Step S7104, fall liquid level: falling liquid level is exactly to reduce muddy water in the storehouse, even plasma discharge is greater than advancing slurry.The muddy water pattern to be converted to the air cushion pattern before falling liquid level, the equalizing valve of promptly opening between two storehouses is supplied gas to muddy water storehouse 2, increase along with muddy water storehouse 2 gases, muddy water storehouse 2 finally all slowly descends with air cushion storehouse 4 liquid levels, regulate the speed of falling liquid level according to the size of air inlet, promptly adjust the flow that respectively advances slurry pump, guarantee the warehouse entry operating pressure of muddy water storehouse otch pressure for setting in principle, fluctuation range is controlled at ± 0.1bar.Along with the decline of liquid level in the storehouse, gradient reduces air cushion storehouse pressure simultaneously, and final air cushion storehouse 4 air pressure are set identical with otch pressure.
Step S7106, air pressure and liquid level are observed: after being converted to the air cushion pattern, strengthen and the getting in touch of face of land observer, face of land gas leakage and emit situation such as slurry that big variation can not be arranged, face of land monitoring is normal; Fall and to observe muddy water storehouse 2 each pressure, air cushion storehouse 4 in the liquid level process and bigger fluctuation do not occur with air supply system pressure; Liquid level is reduced to behind the precalculated position (according to the operation that will be engaged in, general liquid level is minimum to be about 10%), it is more stable to continue observation pressure and liquid level industry air compressor machine air feed, and pressure does not sharply descend or big fluctuation occurs, and the muddy water liquid level goes up slow or stable in the storehouse simultaneously.
Step S712, band is compressed into the storehouse and is checked:
Air pressure and muddy water liquid level all confirm stable after, by medical practitioner behaviour storehouse, under lifesaving personnel's accompanying and one of the constructor warehouse entry that pressurizes earlier; Follow procedure is opened square door 3 behind the warehouse entry, further face strata condition, mud film quality, face seal etc. is checked by the building technician earlier, confirms can carry out other operation after the safety; Then, cutterhead 1, cutter (comprising cutting knife cutter 8, hobboing cutter cutter 9, edge-protected cutter 11 and edge doctor 12) or storehouse inner question situation are checked and confirm, finally come to determine the concrete operations scheme in the storehouse by the constructor.
Step S714, band is compressed into the storehouse operation:
According to the programme of work that engineering department formulates, the constructor is under medical practitioner behaviour storehouse and lifesaving personnel's cooperation, and the warehouse entry that pressurizes again carries out work such as tool changing or fault eliminating in the storehouse.
Step S716, the pump drainage of ponding in the storehouse:
In order to reduce the warehouse entry operating pressure as far as possible, the pressure of the pressure that sets generally speaking 2 middle and upper part, balance muddy water storehouse enters in the storehouse so also have water in the stratum unavoidably, and liquid level also can progressively rise, when rising to certain altitude and influence work, just must reduce liquid level once more.
Step S718, decompression is delivered from godown and is recovered driving:
Decompression is delivered from godown: specialty behaviour storehouse doctor will work out corresponding decompression schedule in strict accordance with country's standard of diving under water, and after every group of warehouse entry personnel warehouse entry operation arrives the stipulated time, must in time enter the decompression storehouse, according to corresponding decompression schedule, reduces pressure and delivers from godown.
Fig. 8 is the schematic flow sheet of shield machine peripheral water stopping limit row warehouse entry method embodiment of the present invention, and as shown in Figure 8, shield machine peripheral water stopping limit row warehouse entry method of the present invention comprises:
Step S802 obtains the geological hydrology information of the face of shield machine, determines warehouse entry method:
Before carrying out the shield machine warehouse entry operation, obtain the geological hydrology information of the face of shield machine, can or add solid from steady undisturbed formation if face is in, the stratum globality is better, under the situation that crevice water is not too grown, adopt peripheral water stopping limit row warehouse entry method warehouse entry.
Step S804, peripheral water stopping is handled:
In adopting the full section rock stratum of this warehouse entry method, the easier behind formation rear portion water stream channel in the section of jurisdiction, this stratum sealing are generally between section of jurisdiction and the stratum, between shield shell and the stratum gap.Afterbody comes the shutoff of water can be the same with soft stratum, takes to strengthen the synchronous grouting amount, and can carry out secondary supplement slip casting to a few endless tube sheets of deviating from the shield tail.If outer stratum Lai Shui is also very big for the shield shell, can utilize in the shield machine pre-grouting hole on the precursor to inject water shutoff material, the water that comes of shield shell periphery, rear portion is carried out shutoff, reduce the charge for remittance amount in the storehouse as far as possible.
Look the stability and the permeability on stratum, adjust pressure, proportioning and the injection rate of various slurries, prevent that mortar or biliquid from starching locking shield shell behind the isometric time solidification.
Step S806, pattern conversion and release:
Pattern conversion: the pattern conversion is about to the muddy water pattern and transfers the air cushion pattern to, and method and band are compressed into the storehouse pattern to change S7104 (falling liquid level) the same, just can suitably reduce air cushion pressure in falling the liquid level process.
Release and during liquid level observe: transfer to and muddy water liquid level in the storehouse reduced to after the air cushion pattern minimumly, then reduce the setting pressure in air cushion storehouse 4, be accompanied by the reduction air cushion storehouse 4 of air cushion setting pressure and the pressure in muddy water storehouse 2 and all slowly reduce with the 0.2bar gradient.To observe the stratum during the release and penetrate into the water yield in the storehouse, judging the stagnant water effect on stratum, compress into the storehouse and improve and finally judge for opening wide not have.When the air cushion setting pressure reduces to 0, then close pressure automatic adjust system, opening that muddy water storehouse outlet valve unloads until the storehouse internal pressure is 0, but no abnormal situation then normal pressure open a position.
Step S808, open type opens a position:
Gas-monitoring in the storehouse: after release is finished, liquid level rising situation is controlled in the observation storehouse, then can open air cushion storehouse round door, gas detecting in the advanced promoting the circulation of qi pad storehouse 4, certain hour ventilates in the storehouse simultaneously, open the square door 3 in muddy water storehouse after no abnormal, and carry out gas detecting and ventilation in the storehouse simultaneously, guarantee that the gas situation satisfies personal security job requirement in the storehouse in the storehouse.
Step S810, the warehouse entry operation:
After satisfying the warehouse entry condition that opens a position, face stratum and percolating water situation are further confirmed, carried out operation in the storehouse by normal procedure then, will observe and analyze the state of development on stratum at any time in the operation process by the constructor.
Step S812, the discharging of ponding in the storehouse:
When face oozes dew hour, the discharging valve by bottom, air cushion storehouse is disposed in the tunnel fully, discharges outside the hole by drainage again; If it is bigger that face oozes dew, discharging valve is put too late, and ponding also continues to go up in the storehouse, then will take work a period of time, and liquid level is closed door and withdrawn from personnel after going up, and pressurize repeatedly pump drainage and release reach the normal pressure condition of work; If the working time is too short, should considers to carry out once more peripheral water stopping and handle, to reach rational operation work efficiency.
Fig. 9 is the schematic flow sheet of shield machine stratum consolidation sealing limit row warehouse entry method embodiment of the present invention, the stratum consolidation warehouse entry is actually the scope that belongs to peripheral water stopping limit row warehouse entry, just want earlier soft stratum to be improved by stratum consolidation, make the stratum of shield machine excavated section and peripheral certain limit be equivalent to full section rock stratum, and tool anti-permeability preferably.
As shown in Figure 9, shield machine stratum consolidation sealing limit row warehouse entry method of the present invention comprises:
Step S902 obtains the geological hydrology information of the face of shield machine, determines warehouse entry method;
Before carrying out the shield machine warehouse entry operation, obtain the geological hydrology information of the face of shield machine, if face is in the weak Fu Shui stratum, should adopt stratum consolidation sealing limit row warehouse entry method warehouse entry.
Step S904, stratum consolidation:
The mode of stratum consolidation has: advance borehole reinforcing etc. in face of land deep hole compaction grouting, deep-mixed pile, high-pressure rotary jet grouting pile, adjacent tunnel horizontal reinforcing and this tunnel.At first, should preferentially select leading stratum consolidation, avoid the shield structure to shut down the original place, back and reinforce; Secondly, the situation in conditions permit adopts the face of land to reinforce as far as possible.
Step S906, the consolidation effect assessment:
To verify and assess strengthening quality after reinforcing is finished,, should after adding strong certain hour such as solid, carry out the drilled drawing-core test at leading stratum consolidation.At first the situations such as continuity by core judge add solid globality how, secondly by the boring experiment, checking adds the permeability of solid, once more core is carried out pressure testing, confirms to add the bulk strength of solid.If the blind area of reinforcing, permeability are arranged than problems such as big or insufficient strength, reinforcing or reinforcing again separately.
Step S908 adds solid inner rim sealing:
Shield machine enter add solid after, can carry out peripheral water stopping according to the mode of full section rock stratum and handle, finally reach the open type purpose that opens a position.
Adopt the stratum consolidation warehouse entry because be, should consider shield machine enter add solid after cutterhead the place ahead also leave the certain thickness solid that adds, adding solid also will have certain thickness in cutterhead otch ring periphery, and preferably the shield tail also enters fully and adds solid, to play avalanche prevention and sealing effect preferably.
As shown in figure 10, the invention also discloses the embodiment of shield machine low voltage limit row warehouse entry method, comprising:
Low voltage limit row warehouse entry is to be based upon that ripe band is compressed into the storehouse experience and face stratum, storehouse has on certain self-stability basis, by being with the operation of low pressure warehouse entry, both can guarantee trouble free service like this, can improve greatly again to be with and compress into the operating efficiency in storehouse.
Step S1002 obtains the geological hydrology information of the face of shield machine, determines warehouse entry method;
Before carrying out the shield machine warehouse entry operation, obtain the geological hydrology information of the face of shield machine, if the area surface layer has on certain self-stability basis, still can not reach the target that normal pressure opens a position by peripheral water stopping, adopt low voltage limit row method warehouse entry.
Step S1004, after face provides enough back-pressure, take low voltage limit row warehouse entry method warehouse entry:
Low voltage limit row warehouse entry generally is can not be successful through attempting repeatedly that open type opens a position, and can be divided into three kinds of situations: first kind, the face stratum is stable, but after passing through repeatedly peripheral water stopping, the storehouse internal exchange water yield is also very big, and the discharging valve discharging is too late, water level rises comparatively fast in the storehouse, has a strong impact on operating efficiency; Second kind, the storehouse internal exchange water yield is controlled, but the face less stable need provide certain back-pressure; The third, the charge for remittance amount is big, and also less stable of face, must add certain pressure.Wherein, warehouse entry pressure preferably can be controlled at below the 1.2bar.
In addition, because general major diameter slurry shield machine is in order to abdicate the bottom transport channel, all slurry pump is arranged on the trailer upper strata, and the plasma discharge mouth 10 in muddy water storehouse is at bottommost, and therefore, slurry pump can not plasma discharge under normal pressure, want to fall liquid level with slurry pump, must add certain pressure in the storehouse, the size of this pressure is relevant to the discrepancy in elevation between the plasma discharge mouth 10 with pumping hole, wants the pressure of 0.5～1bar generally speaking.
Therefore, under above-mentioned first kind of situation, pressure can be set in about 0.8bar, but above-mentioned second kind and the third situation, then to determine rational minimum pressure, must guarantee also to be higher than 1.2bar possibly for face provides enough back-pressures according to repetition test.At low voltage limit row warehouse entry duration of work, compress into the storehouse degree by band and control, strengthen monitoring to charge for remittance in the observation of face stable case and the storehouse.
Step S1006, the pump drainage of ponding in the storehouse:
It is basic identical that the pump drainage mode of ponding and band are compressed into storehouse pump drainage mode in the storehouse, but the pump drainage number of times should not be too frequent, and the speed of falling liquid level also should not be too fast, falls liquid level with minimizing and cause pressure oscillation in the storehouse.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1, a kind of warehouse entry method of shield machine is characterized in that, comprising:
A, obtain the geological hydrology information of the face of shield machine;
B, according to described geological hydrology information water sealing consolidation is carried out on the stratum of described face and handle;
C, constructor enter and carry out operation in the storehouse.
According to the warehouse entry method of the described shield machine of claim 1, it is characterized in that 2, also comprise: ponding carries out pump drainage in to described storehouse after described operation C.
3, according to the warehouse entry method of the described shield machine of claim 1, it is characterized in that, if described geological hydrology information show described face be in can not normal pressure from steady Fu Shui stratum, before described operation B, comprise:
According to the otch ring compression in the air cushion storehouse of pressure reference value in the described geological hydrology information and shield machine, obtain the operating pressure of warehouse entry, described operating pressure should be higher than described otch ring compression 0.1 to 0.2bar; And described operation C comprises:
Described constructor compresses into the storehouse with described operating pressure band, and after described face was checked, described constructor began operation.
According to the warehouse entry method of the described shield machine of claim 3, it is characterized in that 4, described operation C also comprises:
After operation finished, described constructor entered the decompression storehouse of shield machine, delivered from godown through after the reduced pressure treatment.
According to the warehouse entry method of claim 3 or 4 described shield machines, it is characterized in that 5, described operation B comprises:
Strengthen the synchronous grouting amount, shutoff shield tail rear portion, section of jurisdiction be stratum Lai Shui behind;
In the muddy water storehouse of shield machine, annotate high viscosity mud and form the mud film, the sealing face;
To face of land slip casting, shutoff is leaked gas or is emitted the slurry passage.
Before shield machine is shut down, the face of land is monitored and observed, and compare with the original place epiphase;
Reduce the liquid level in described muddy water storehouse, reduce the pressure in the air cushion storehouse of shield machine simultaneously;
Observe the liquid level in described muddy water storehouse and the pressure in air cushion storehouse, determine that fluctuation does not appear in described liquid level and pressure.
6, according to the warehouse entry method of the described shield machine of claim 5, it is characterized in that described full section soft stratum, last soft hard Fu Shui stratum and the broken-rock zone stratum down of can not normal pressure comprising from steady Fu Shui stratum.
According to the warehouse entry method of claim 1 or 2 described shield machines, it is characterized in that 7, be in the stratum that globality is better, crevice water is not too grown if described geological hydrology information shows described face, described operation B comprises:
Strengthen the synchronous grouting amount, carry out secondary supplement slip casting, and inject water shutoff material;
Adjust pressure, proportioning and the injection rate of slurries;
Reduce the liquid level in the muddy water storehouse of shield machine, reduce the pressure in the air cushion storehouse of shield machine simultaneously;
Described operation C comprises:
After the storehouse carried out release and handle, the certain hour that ventilates in the storehouse carried out gas detecting and ventilation in the storehouse;
Described constructor confirms the situation of face, carries out operation then.
According to the warehouse entry method of claim 1 or 2 described shield machines, it is characterized in that 8, be in weak Fu Shui stratum if described geological hydrology information shows described face, described operation B comprises:
Stratum to described shield machine reinforces;
Effect to described reinforcing is assessed;
According to the mode of full section rock stratum the periphery on described stratum being carried out sealing handles.
9, according to the warehouse entry method of claim 1 or 2 described shield machines, it is characterized in that, if described geological hydrology information show that described face is in can be from steady stratum, described operation B comprises:
After described face provided enough back-pressure, described constructor entered and carries out operation in the storehouse.
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| CN2009101480630A CN101666231B (en) | 2009-06-24 | 2009-06-24 | Shield machine warehouse entry method |
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| CN2009101480630A CN101666231B (en) | 2009-06-24 | 2009-06-24 | Shield machine warehouse entry method |
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| CN101666231B CN101666231B (en) | 2011-11-16 |
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| CN102052079A (en) * | 2010-11-19 | 2011-05-11 | 中铁一局集团有限公司 | Method for exchanging tool of shield machine for tunnel construction |
| CN102305082A (en) * | 2011-07-23 | 2012-01-04 | 中铁十二局集团第二工程有限公司 | Method for relieving and cutterhead repairing of shield machine in weathering groove |
| CN102601865A (en) * | 2012-04-06 | 2012-07-25 | 中联重科股份有限公司 | Drilling slurry proportioning system, proportion obtaining device and proportion obtaining method |
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2009
- 2009-06-24 CN CN2009101480630A patent/CN101666231B/en not_active Expired - Fee Related
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