CN101892846A - Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum - Google Patents
Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum Download PDFInfo
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- CN101892846A CN101892846A CN 201010228478 CN201010228478A CN101892846A CN 101892846 A CN101892846 A CN 101892846A CN 201010228478 CN201010228478 CN 201010228478 CN 201010228478 A CN201010228478 A CN 201010228478A CN 101892846 A CN101892846 A CN 101892846A
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Abstract
The invention belongs to the technical field of waterproofing plugging of tunneling overexcavation gaps, and particularly relates to a shield burial method for receiving and plugging an overexcavation gap in high-water-pressure stratum. The invention solves the problem that the existing overexcavation gap waterproofing plugging technique is not suitable for high-water-pressure stratum, has high risk for shield receiving and can easily induce accidents. The method comprises the following steps: preserving a shield receiving well; breaking the wall of the shield receiving well to chisel out an annular groove, and laying freezing pipes in the annular groove; filling water into the shield receiving well, or filling water after filling soil; impelling the shield machine until only the shell of the shield tail is still in the entrance/exit ring of the tunnel; starting freezing, and injecting grout into the overexcavation gap; pumping water when the shield receiving well is isolated from the outside confined aquifer; and after pumping water to remove silt, cutting off part of the shield tail, and lifting out the disassembled shield machine, thereby completing receiving. The invention has the beneficial effects of ensuring that the shield can be received in the high-pressure fine sand layers and other severe strata, and preventing catastrophic accidents in shield receiving in unfavorable strata.
Description
Technical field
The invention belongs to backbreak behind the wall of section of jurisdiction when the receiving technical field of space waterproofing and leakage-stopping of shield structure in the shield tunnel construction project, be specifically related to a kind of high-water-pressure stratum shield structure and flow or blow over and cover completely the backbreak method in space of formula receiving and plugging.
Background technology
The waterproof and leaking stoppage technology in space of backbreaking behind the wall of section of jurisdiction when existing shield structure receives mainly contains:
1. pressure injection biliquid cement mortar waterproof and leaking stoppage technology.This is that a kind of shield structure commonly used at present receives water-proof method for stopping leakage, promptly, the water glass that adds certain proportioning abolish portal when the shield structure receives before with cement paste is injected into the space the inside of backbreaking behind section of jurisdiction and the shield structure wall, pours into portal along the space of backbreaking and forms the accident of gushing to prevent underground water that underground water particularly contains certain pressure.This method, played the effect of water blockoff to a certain extent, it is exactly the effect that slurries in the behind of shield duct piece can play water blockoff that but this method has a fatal shortcoming, but the slurries behind the backing structure wall that draws water are along with next step continuation of shield structure advances, the slurries that originally solidified are by disturbance fragmentation again, do not have the particularly effect of artesian water of water blockoff, slurries may be set on the shield structure shell simultaneously, it is bigger to make next step propelling backbreak, increased the risk that the shield structure receives, especially may cause catastrophic consequence in the bigger powder fine sand layer area of pressure-bearing.
2. polyurethane filling biliquid is starched leakage stopping technology.Polyurethane is a kind of chemical substance of water breakthrough foaming, and is comparatively common in usually descending the process of emergency dealing, and it cooperates the biliquid slurry can play the excellent waterproof plugging effect.Before abolishing portal, the reception of shield structure is injected into the inside, space of backbreaking behind section of jurisdiction and the shield structure wall earlier with polyurethane, to play the effect of filtering leak stopping, play the effect of choke plug simultaneously for the biliquid slurry of next step injection, can inject the biliquid slurry behind the band polyurethane foam and fill the space of backbreaking.The cost of this kind method is high, effect is passable in general non-artesian water stratum, but at high artesian area, substantially do not have due effect, reason is that the filler (polyurathamc and solidify biliquid slurry) behind the row's of drawing water silt backing structure wall moves along with moving on of shield structure and irregular destruction takes place, ruined water-blocking layer does not have the effect of waterproofing and leakage-stopping substantially at high artesian area, very easily takes place than the large-engineering accident.
Summary of the invention
The present invention receives the wall thickness space waterproof and leaking stoppage technology of backbreaking and is not suitable for high-water-pressure stratum in order to solve existing shield structure, causes the shield structure to receive and has a big risk, and the problem that easily has an accident provides a kind of high-water-pressure stratum shield structure to flow or blow over and cover completely the backbreak method in space of formula receiving and plugging.
The present invention adopts following technical scheme to realize:
The backbreak method in space of a kind of high-water-pressure stratum shield structure buried type receiving and plugging, its step is as follows:
1), receive the station or building reserve in the process of station size greater than the independent space of shield machine main body as shield structure received well, this received well will guarantee water-tight and can bear station external water pressure power;
When 2), shield machine is apart from shield structure received well 10～20m, concrete and the reinforcing bar of abolishing position, the corresponding tunnel of shield structure received well body of wall form the portal circle, in the portal circle, dig out annular groove then, and in the good annular groove of cutter, lay double-deck freezing pipe and fixing, freezing pipe connects the ground refrigeration system;
3), in shield structure received well, pour water or banket earlier and pour water again; If pour water, the pressure of hydraulic pressure and stratum artesian water maintains an equal level; Pour water if banket earlier, making a concerted effort of water and soil pressure is fair with the pressure of stratum artesian water again;
4), shield machine advances, and passes termination stabilization zone and portal circle successively, pushes to the reception carriage, treat the shield structure cutterhead, anterior shield and in shield all release the portal circle, whole shield machine halts when having only shield tail shell in the portal circle;
5), start the ground refrigeration system, freezing pipe freezes to form portal freeze seal circle, freezes the body impervious layer outside formation of shield tail, simultaneously by the Grouting Pipe of shield tail pipe sheet and shield structure afterbody behind the wall of section of jurisdiction, backbreak inject the biliquid mortar in the space and fill up wall after the space;
6), freeze the body impervious layer and reach design thickness and intensity, that backbreaks behind the wall of section of jurisdiction simultaneously that the space forms crosses aquaporin also by the slip casting shutoff, whole shield structure received well thoroughly separates with extraneous artesian aquifer, begins to take out water in the shield structure received well this moment, needs further desilting when banketing;
7), after the desilting of drawing water finishes, slice off part shield tail, the part shield tail that stays equipped section of jurisdiction in the shield tail forms permanent lining, secondary lining, and shield machine disintegrates and hangs out, and finishes the final reception of shield machine.
The present invention mainly is the waterproofing and leakage-stopping design and construction behind section of jurisdiction and the shield structure wall when receiving in high-water-pressure stratum at the shield structure, after the method that employing is freezed to encircle is fully freezed water, reach and around the shield structure, form a sealing ring, treat to slice off the shield tail after the draining desilting, the shield tail that is sliced off and the section of jurisdiction of subsequent installation form the permanent lining, secondary lining of sealing fully together, the safety that reaches the shield structure receives the generation of the incidents that averts a calamity.
The relative prior art of the present invention has following beneficial effect: cooperate and flow or blow over and cover completely formula shield structure reception job practices, utilize the portal dog collar that high artesian is isolated in outside the received well, guaranteed the successful reception of shield structure in the extreme difference stratum such as high pressure-bearing powder fine sand layer, reach theoretically that to have guaranteed in the practice that shield structure in the abominable stratum receives perfectly safe, avoid the catastrophic failure that the shield structure receives in the poor strata, be particularly useful for metro shield reception construction in the stratum, coastal cities, east, great promotional value and economic benefit are arranged.
Description of drawings
Fig. 1 is a shield structure received well layout plan
Fig. 2 is a shield structure received well longitudinal plan
Fig. 3 is that annular groove and freezing pipe are laid detail structure figure
Fig. 4 is toward the interior water filling schematic diagram of shield structure received well
Fig. 5 has only the shield tail to stay the portal circle with interior schematic diagram for shield machine is advanced into
Fig. 6 starts for freezing pipe and forms waterproofing and leakage-stopping layer schematic diagram at the section of jurisdiction grouting behind shaft or drift lining
Fig. 7 is the shield structure received well schematic diagram that desilting finishes that draws water
The schematic diagram that Fig. 8 receives for the shield structure formula of flowing or blow over and cover completely
Among the figure: the pre-tunneling of 1-, 2-termination stabilization zone, 3-shield structure received well, 4-received well body of wall, tunnel, 5-section of jurisdiction, 6-shield machine, 7-ground line, the 8-annular groove, the 9-freezing pipe, 10-receives carriage, 11-station base plate, 12-anterior shield, shield among the 13-, 14-shield tail, the space of backbreaking behind the wall of 15-section of jurisdiction, the 16-slip casting of backbreaking in the space is filled, 17-portal freeze seal circle, 18-termination stabilization zone, the waterline that 19-injects.
The specific embodiment
In conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
Perfectly safe for guaranteeing that the shield structure receives in high hydraulic pressure aquifer sand layer stratum, need flow or blow over and cover completely formula shield structure receives, in advance receive the station or building reserve in the process of station size greater than the independent space of shield machine main body as shield structure received well, shield structure received well will guarantee and can bear station external water pressure power that the special-purpose received well layout plan of shield structure as shown in Figure 1 water-tight.
The shield structure arrives preceding (generally apart from portal 10～20m), abolish and receive portal concrete and reinforcing bar, and then dig out annular groove in the portal circle and in the good annular groove of cutter, lay double-deck freezing pipe and fixing, freezing pipe connects the ground refrigeration system, as Fig. 2, shown in Figure 3.After freezing pipe is laid in the groove that portal is dug out and is fixedly finished, in the received well that applies, pour water (banket earlier in the time of necessity and pour water again) to certain water level, this water level is decided according to the pressure size of artesian water, if outer superimposed fill, the pressure that then calculates make a concerted effort basic and the stratum artesian water of water and soil pressure maintains an equal level, as shown in Figure 4.
After injection is finished, the shield structure advances according to design tunnel center line, the portal circle that passes the termination stabilization zone successively and cut, push to acceptance frame, treat the shield structure cutterhead, anterior shield and in shield halt when all releasing the portal circle, this moment, whole shield structure had only shield tail shell in the portal circle, as shown in Figure 5.
After this, begin to start the ground refrigeration system, allow cooling fluid circulating frozen in annular freezing pipe, form the certain thickness body impervious layer that freezes in that the shield tail is outside substantially, meanwhile, the Grouting Pipe by shield tail pipe sheet and shield structure afterbody is injected the biliquid mortar and is filled up space behind the wall in the space behind wall.Both form the waterproofing and leakage-stopping layer of certain thickness and intensity, as shown in Figure 6.
Wait to freeze to reach design time, think that promptly freezing body reaches certain thickness and intensity, freeze the thickness and the intensity of body, those skilled in the art can decide in conjunction with hydrogeological conditions according to known design general knowledge, generally choosing thickness is 2～3m, and intensity is not less than 5MPa.What the space formed behind the wall of section of jurisdiction crosses aquaporin also by the slip casting shutoff, and whole shield structure received well thoroughly separates with extraneous artesian aquifer, begins to take out the water in the received well this moment, need further desilting when banketing, as shown in Figure 7.
After the desilting of drawing water finishes, slice off part shield tail, the part shield tail that stays equipped section of jurisdiction in the shield tail forms permanent lining, secondary lining, and the shield structure disintegrates and hangs out, and finishes the final reception of shield structure, as shown in Figure 8.
Claims (1)
1. the high-water-pressure stratum shield structure buried type receiving and plugging method in space of backbreaking is characterized in that step is as follows:
1), receive the station or building reserve in the process of station size greater than the independent space of shield machine (6) main body as shield structure received well (3), this received well will guarantee water-tight and can bear station external water pressure power;
When 2), shield machine (6) is apart from shield structure received well (3) 10～20m, concrete and the reinforcing bar of abolishing position, the corresponding tunnel of shield structure received well body of wall (4) form the portal circle, in the portal circle, dig out annular groove (8) then, and in the good annular groove (8) of cutter, lay double-deck freezing pipe (9) and fixing, freezing pipe (9) connects the ground refrigeration system;
3), in shield structure received well (3), pour water or banket earlier and pour water again; If pour water, the pressure of hydraulic pressure and stratum artesian water maintains an equal level; Pour water if banket earlier, making a concerted effort of water and soil pressure is fair with the pressure of stratum artesian water again;
4), shield machine (6) advances, pass termination stabilization zone (2) and portal circle successively, push to and receive carriage (10), treat that cutterhead, anterior shield (12) and the middle shield (13) of shield structure all released the portal circle, whole shield machine halts when having only shield tail (14) shell in the portal circle;
5), start the ground refrigeration system, freezing pipe (9) freezes to form portal freeze seal circle (17), freeze the body impervious layer outside formation of shield tail (14), simultaneously by the Grouting Pipe of shield tail pipe sheet and the shield structure afterbody space after injection biliquid mortar is filled up wall in the space (15) of behind the wall of section of jurisdiction, backbreaking;
6), freeze the body impervious layer and reach design thickness and intensity, that backbreaks behind the wall of section of jurisdiction simultaneously that space (15) forms crosses aquaporin also by the slip casting shutoff, whole shield structure received well (3) thoroughly separates with extraneous artesian aquifer, begin to take out water in the shield structure received well (3) this moment, need further desilting when banketing;
7), after the desilting of drawing water finishes, slice off part shield tail (14), the part shield tail that stays equipped section of jurisdiction in the shield tail forms permanent lining, secondary lining, and shield machine disintegrates and hangs out, and finishes the final reception of shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102284781A CN101892846B (en) | 2010-07-13 | 2010-07-13 | Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102284781A CN101892846B (en) | 2010-07-13 | 2010-07-13 | Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum |
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| Publication Number | Publication Date |
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| CN101892846A true CN101892846A (en) | 2010-11-24 |
| CN101892846B CN101892846B (en) | 2011-11-16 |
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| CN2010102284781A Active CN101892846B (en) | 2010-07-13 | 2010-07-13 | Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum |
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|---|---|---|---|---|
| CN102352753A (en) * | 2011-06-29 | 2012-02-15 | 中铁第四勘察设计院集团有限公司 | Freezing consolidation and soil-accumulating watering shield arrival method |
| CN102409691A (en) * | 2011-09-08 | 2012-04-11 | 同济大学 | Freezing process water stopping device of pre-buried freezing pipe at opening of wall body of underground continuous wall |
| CN102536253A (en) * | 2011-12-30 | 2012-07-04 | 广州轨道交通建设监理有限公司 | Construction method of earth cabin back filling and cabin entering operation during earth pressure shielding |
| CN102606175A (en) * | 2012-03-12 | 2012-07-25 | 山东新阳能源有限公司 | Method for plugging confined water in underground coal mine sandstone crack |
| CN102635362A (en) * | 2011-11-02 | 2012-08-15 | 中铁隧道集团有限公司 | Secondary reception constructing method for shield arrival |
| CN102635365A (en) * | 2012-05-06 | 2012-08-15 | 上海城建市政工程（集团）有限公司 | Construction method for holing of shield machine |
| CN103032072A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for disassembling, lifting and transferring closed type station shield to transferring line to be hoisted out |
| CN103899325A (en) * | 2014-04-23 | 2014-07-02 | 上海隧道工程股份有限公司 | Construction method for shield machine to enter hole to receive concrete box |
| CN106194218A (en) * | 2016-08-30 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | The shield end soil body reinforcement system in high water head deep and thick sand area |
| CN108222955A (en) * | 2018-01-08 | 2018-06-29 | 中铁十六局集团北京轨道交通工程建设有限公司 | For receiving the rail set of shield machine |
| CN108505976A (en) * | 2018-03-19 | 2018-09-07 | 西南石油大学 | A method of being depressured exploiting ocean gas hydrate using coupling freezing wall |
| CN108915705A (en) * | 2018-08-09 | 2018-11-30 | 中铁局集团有限公司 | A kind of baffle grouting construction method blocked for shield export & import leak |
| CN109140046A (en) * | 2018-11-01 | 2019-01-04 | 中铁十八局集团有限公司 | A kind of push pipe pipe curtain faces end head plugging method |
| CN109667985A (en) * | 2018-12-26 | 2019-04-23 | 上海市政建设有限公司 | The method that push-bench is docked with received well steel sleeve in jacking construction |
| CN109695455A (en) * | 2018-12-21 | 2019-04-30 | 中铁十二局集团有限公司 | Method of reseptance in a kind of earth pressure balanced shield, EPBS pure water |
| CN109944596A (en) * | 2019-03-20 | 2019-06-28 | 中铁四局集团有限公司 | Secondary reinforcing method for shield crossing near-river rich water sand layer |
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| CN102352753A (en) * | 2011-06-29 | 2012-02-15 | 中铁第四勘察设计院集团有限公司 | Freezing consolidation and soil-accumulating watering shield arrival method |
| CN102352753B (en) * | 2011-06-29 | 2014-08-27 | 中铁第四勘察设计院集团有限公司 | Freezing consolidation and soil-accumulating watering shield arrival method |
| CN102409691A (en) * | 2011-09-08 | 2012-04-11 | 同济大学 | Freezing process water stopping device of pre-buried freezing pipe at opening of wall body of underground continuous wall |
| CN102635362B (en) * | 2011-11-02 | 2014-05-07 | 中铁隧道集团有限公司 | Secondary reception constructing method for shield arrival |
| CN102635362A (en) * | 2011-11-02 | 2012-08-15 | 中铁隧道集团有限公司 | Secondary reception constructing method for shield arrival |
| CN102536253A (en) * | 2011-12-30 | 2012-07-04 | 广州轨道交通建设监理有限公司 | Construction method of earth cabin back filling and cabin entering operation during earth pressure shielding |
| CN102536253B (en) * | 2011-12-30 | 2014-11-12 | 广州轨道交通建设监理有限公司 | Construction method of earth cabin back filling and cabin entering operation during earth pressure shielding |
| CN102606175A (en) * | 2012-03-12 | 2012-07-25 | 山东新阳能源有限公司 | Method for plugging confined water in underground coal mine sandstone crack |
| CN102635365A (en) * | 2012-05-06 | 2012-08-15 | 上海城建市政工程（集团）有限公司 | Construction method for holing of shield machine |
| CN102635365B (en) * | 2012-05-06 | 2015-04-22 | 上海城建市政工程（集团）有限公司 | Construction method for holing of shield machine |
| CN103032072A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for disassembling, lifting and transferring closed type station shield to transferring line to be hoisted out |
| CN103032072B (en) * | 2012-12-08 | 2015-01-07 | 中铁十二局集团第二工程有限公司 | Method for disassembling, lifting and transferring closed type station shield to transferring line to be hoisted out |
| CN103899325A (en) * | 2014-04-23 | 2014-07-02 | 上海隧道工程股份有限公司 | Construction method for shield machine to enter hole to receive concrete box |
| CN103899325B (en) * | 2014-04-23 | 2016-04-13 | 上海隧道工程有限公司 | The construction method that concrete casing shield receives |
| CN106194218A (en) * | 2016-08-30 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | The shield end soil body reinforcement system in high water head deep and thick sand area |
| CN106194218B (en) * | 2016-08-30 | 2019-12-06 | 中铁第四勘察设计院集团有限公司 | shield end soil body reinforcing system in high-water-head deep-thick sand layer area |
| CN108222955A (en) * | 2018-01-08 | 2018-06-29 | 中铁十六局集团北京轨道交通工程建设有限公司 | For receiving the rail set of shield machine |
| CN108222955B (en) * | 2018-01-08 | 2019-10-29 | 中铁十六局集团北京轨道交通工程建设有限公司 | For receiving the rail set of shield machine |
| CN108505976A (en) * | 2018-03-19 | 2018-09-07 | 西南石油大学 | A method of being depressured exploiting ocean gas hydrate using coupling freezing wall |
| CN108505976B (en) * | 2018-03-19 | 2020-12-11 | 西南石油大学 | Method for decompression exploitation of marine natural gas hydrate by using coupling freezing wall |
| CN108915705B (en) * | 2018-08-09 | 2019-10-22 | 中铁一局集团有限公司 | A kind of baffle grouting construction method blocked for shield export & import leak |
| CN108915705A (en) * | 2018-08-09 | 2018-11-30 | 中铁局集团有限公司 | A kind of baffle grouting construction method blocked for shield export & import leak |
| CN109140046A (en) * | 2018-11-01 | 2019-01-04 | 中铁十八局集团有限公司 | A kind of push pipe pipe curtain faces end head plugging method |
| CN109140046B (en) * | 2018-11-01 | 2020-04-14 | 中铁十八局集团有限公司 | Method for plugging end of pipe jacking pipe curtain |
| CN109695455A (en) * | 2018-12-21 | 2019-04-30 | 中铁十二局集团有限公司 | Method of reseptance in a kind of earth pressure balanced shield, EPBS pure water |
| CN109667985A (en) * | 2018-12-26 | 2019-04-23 | 上海市政建设有限公司 | The method that push-bench is docked with received well steel sleeve in jacking construction |
| CN109667985B (en) * | 2018-12-26 | 2024-04-16 | 上海市政建设有限公司 | Method for butting pipe pushing jack and receiving well steel sleeve in pipe pushing construction |
| CN109944596A (en) * | 2019-03-20 | 2019-06-28 | 中铁四局集团有限公司 | Secondary reinforcing method for shield crossing near-river rich water sand layer |
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