CN101644161B - Water stopping device for tunneling machine going in and out of tunnel and water stopping method - Google Patents
Water stopping device for tunneling machine going in and out of tunnel and water stopping method Download PDFInfo
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- CN101644161B CN101644161B CN2009100553827A CN200910055382A CN101644161B CN 101644161 B CN101644161 B CN 101644161B CN 2009100553827 A CN2009100553827 A CN 2009100553827A CN 200910055382 A CN200910055382 A CN 200910055382A CN 101644161 B CN101644161 B CN 101644161B
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- sealing casing
- sleeve
- water stopping
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Abstract
The invention relates to the field of building construction, in particular to a water stopping device for a tunneling machine going in and out of a tunnel and a water stopping method. The water stopping device for the tunneling machine going in and out of the tunnel comprises at least one water stopping casing box with openings at the front part and the back part. The water stopping casing box is arranged at the periphery of a doorway part which is in an enclosure protection structure, is fixedly connected with the enclosure protection structure in a sealing way, and comprises a sleeve with openings at the front part and the back part and a freezing pipe. The freezing pipe is arranged on the inner wall of the sleeve, and is used for injecting refrigerant. A grouting pipe which is communicated with the inner cavity of the sleeve is arranged on the sleeve. The invention also discloses the water stopping method adopting the water stopping device. The freezing pipe can change mixed paste between the water stopping casing box and the tunneling machine or a pipeline into a freezing body. The freezing body can block off a leakage path, ensure that groundwater which possibly leaks can be frozen in time when the tunneling machine or the pipeline structure moves relative to the water stopping casing box, thereby achieving the purpose of water stopping.
Description
Technical field
The present invention relates to the realm of building construction, relate in particular to a kind of digging implement turnover hole antipriming and water-stopping method.
Background technology
Existing push pipe, constructing tunnel have two critical processes: go out starting well and advance received well.These two critical processes all relate to the setting of water-stopping system.
When going out starting well, the antipriming of push pipe, shield tunnel generally adopts rubber curtain cloth ankle socks, unidirectional flap to add systems such as rubber cord.Rubber curtain cotton stockings covers system is not provided with unidirectional flap, and it is better to be applied to geological conditions, in the less pipeline construction of bore.Unidirectional flap adds in the rubber cord system, and the rubber cord is supported by unidirectional flap, and it is relatively poor to be applied to geological conditions, in the bigger pipeline construction of bore.According to concrete geological conditions situation, one or multi-channel " unidirectional flap adds the rubber cord " can be set.The principle that push pipe, shield structure go out the starting well antipriming is to utilize the digging implement direction of advance identical with the reverses direction of rubber cord, the closely connected under pressure digging implement of rubber cord, thus reach the effect of hermetic seal.Generally speaking, the digging implement external diameter is big than the pipeline configuration external diameter, and unidirectional flap can rotate according to these two kinds of outside dimensions, makes the rubber cord closely connected all the time in facility external diameter or structure external diameter, keeps stagnant water effect.
When advancing received well, if adopt rubber cord system, because digging implement is identical with the reverses direction of rubber cord, accept not have in the well pressure to make the rubber cord closely connected on digging implement, stagnant water effect is relatively poor.Adopt more ancillary method such as precipitation in the practice of construction, cheat outer ground and reinforce, secondary enters hole etc.
The antipriming that disposes in the above two-step, it is higher to go out starting well operation degree of safety, advances received well and then has greater risk.There is following shortcoming in general:
1, existing antipriming is inapplicable in the situation that does not have ancillary method such as ground stabilization.
Even 2, existing antipriming is after adopting as ancillary methods such as ground stabilization, precipitation, under extremely unfavorable geological conditions, effect is also undesirable during as high artesian, soft foundation.
Antipriming is provided with differently when 3, going out starting well and advancing received well, and device can not reuse.
When 4, advancing received well, because the rubber cord is identical with the facility direction of advance, safety factor is lower.When adopting secondary to advance the hole technology, after facility go out portal before the steel plate welded seal during this period of time in, the uncontrollable and waste duration of risk.
5. existing antipriming need carry out plugging operations when seepage, setting is the sealing of welding steel plate, and risk is high and inconvenient.
Summary of the invention
In view of this, technical problem to be solved by this invention provides a kind of digging implement turnover hole antipriming, freezing pipe can become the mixed serum between sealing casing and facility or the structure and freezes body, the seepage approach that freezed the body shutoff, and freeze when guaranteeing the relative casing motion of facility or structure body also can in time freeze may seepage underground water reach the purpose of sealing.
For solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of digging implement turnover hole antipriming, the sealing casing that comprises at least one front and back opening, described sealing casing is arranged on the peripheral region of the door opening position of space enclosing structure, and described sealing casing and space enclosing structure are sealedly and fixedly connected, described water-baffling sleeve case comprises: the sleeve of a front and back opening and the freezing pipe that is used to inject refrigerant that is arranged at sleeve lining, described sleeve is provided with the Grouting Pipe that is communicated with barrel bore.
Further, described refrigerant is salt solution, liquid nitrogen, liquefied ammonia or freon.
Further, described salt solution is selected from any one or any several mixture in sodium chloride, calcium chloride, natrium nitrosum, the potash calcium nitrate.
Further, described sleeve is provided with insulation layer outward.
Further, described freezing pipe is wound on sleeve lining along sleeve longitudinal spiral shape.
Perhaps, described freezing pipe is some pipelines that are distributed in described sleeve lining, and described pipeline is vertically placed along sleeve end to end, and adjacent channel head and the tail successively connects.Further, connect by flexible pipe between the described adjacent channel.
Further, the shape of cross section of described sleeve is corresponding with the digging implement profile.The cross section of described sleeve can rectangular circular or oval or Double Circle.
Further, the longitudinal section of described sleeve is rectangular or trapezoidal or by the big combined shaped small in ends in two trapezoidal middle parts that connect to form.
The invention also discloses a kind of digging implement water-stopping method of appearing, adopt above-mentioned antipriming, comprise the steps:
Operation one, installation sealing casing are in space enclosing structure door opening peripheral region.
Operation two, digging implement are in place, and the head of digging implement arrives at outside the door opening by the sealing casing.
Operation three, interim shutoff is carried out in the space between sealing casing end and the digging implement.
Operation four, fill toward the space between sealing casing and the digging implement by Grouting Pipe and to freeze slurries.
Operation five, inject toward freezing pipe and to be used for refrigerant and to make and freeze slurries and form and freeze body.
The jacking forward of operation six, digging implement.
Operation seven, the pipeline configuration that is installed on the digging implement rear portion arrive at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure.
Operation eight, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
Further, in the described operation seven, described loss circulation material is cement paste or polyurethane.
The invention also discloses a kind of digging implement and advance the hole water-stopping method, adopt above-mentioned antipriming, comprise the steps:
Operation one, the sealing casing is installed, and is installed in a side of sealing casing and to seal up a door in space enclosing structure door opening peripheral region;
Operation two, digging implement arrive at and seal up a door by door opening, sealing casing successively;
Operation three, fill toward the space between sealing casing and the digging implement by Grouting Pipe and to freeze slurries;
Operation four, inject toward freezing pipe and to be used to freeze the described refrigerant that freezes slurries, make and freeze slurries and form and freeze body;
Operation five, dismounting are sealed up a door, and digging implement is jacking forward;
The pipeline configuration at operation six, digging implement rear portion arrives at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure;
Operation seven, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
Beneficial effect of the present invention is as follows:
1. protection surrounding enviroment:, therefore, avoid the frost heave and the thaw collapse that cause thus outside active well because freezing process does not carry out in the soil body.
2. saving cost: because freezing process only carries out among a small circle, compare the common large volume soil body and freeze to save relevant refrigerant, the energy, equipment, artificial etc.Since reduced construction land tenure, relocation of services, the expense of ancillary method etc., therefore required cost is low.Since antipriming go out under starting well (appearing) operating mode to use finish after, the promptly dismountable into operating mode of received well (entering the hole) that is applied to, an and cover antipriming can be in a plurality of engineering repeated application.Therefore, can economical with materials.
3. simplification working procedure: original each operation of installing is at the construction field (site) replaced by a casing.Only need during construction effective connection of sealing casing and space enclosing structure can be used, simplified on-site construction processes.Particularly simplified operation such as welding steel when now advancing received well.
4. raising degree of safety: no matter have or not ancillary method, carry out operation in the visible space in active well, and adopted and freezed sealing technology efficiently, degree of safety improves.
5. save the duration: existing antipriming needs multiple operation to install at the scene, and secondary advances the hole method and all prolonged the activity duration when particularly advancing received well.The sealing casing with go along with sb. to guard him effective the connection after can use, saved the duration greatly.
6. control is convenient: when the turnover hole, can regulate the refrigerant conveying capacity according to the seepage situation and get final product, control is simple.And existing antipriming need carry out plugging operations when seepage, and setting is the sealing of welding steel plate, and risk is high and inconvenient.
Description of drawings
Fig. 1 is the cross section structure schematic diagram of the sealing casing of embodiment 1;
Fig. 2 a is the structural representation in vertical section (rectangle) of the sealing casing of embodiment 1;
Fig. 2 b is the structural representation in the vertical section (trapezoidal) of sealing casing;
Fig. 2 c is the structural representation in the vertical section (two trapezoidal combination shapes) of sealing casing;
Fig. 3 is the cross section structure schematic diagram of the sealing casing of embodiment 2;
Fig. 4 is the vertical section structure schematic diagram of the sealing casing of embodiment 2;
Fig. 5 is the structural representation after the freezing pipe of the snakelike layout of embodiment 2 launches.
Among the figure: 1-sleeve, 2-freezing pipe, the import of 21-refrigerant, 22-refrigerant exit, 31-transverse stiffener, 32-longitudinal stiffener, 4-insulation layer, 5-Grouting Pipe, 6-flange.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in detail:
See also Fig. 1 and Fig. 2 a, this digging implement turnover hole antipriming comprises the sealing casing of opening before and after at least one, and described sealing casing is arranged on the peripheral region of the door opening position of space enclosing structure, and described sealing casing and space enclosing structure are sealedly and fixedly connected.Described water-baffling sleeve case comprises: the steel sleeve 1 of a front and back opening and the freezing pipe 2 that is used to inject refrigerant that is arranged at sleeve 1 inwall, and described sleeve 1 is provided with the Grouting Pipe 5 that is communicated with sleeve 1 inner chamber, and Grouting Pipe 5 is used for injecting freezes slurries.One end face of described sealing casing is provided with flange 6, and the sealing casing is fixedlyed connected by flange 6 with space enclosing structure.Described sleeve 1 is outside equipped with the insulation layer 4 that is used to be incubated.The two ends of described freezing pipe 2 are respectively refrigerant import 21 and refrigerant exit 22, and described refrigerant import 21 and refrigerant exit 22 stretch out insulation layer 4.
Described refrigerant can be salt solution, liquid nitrogen, liquefied ammonia or freon.Described salt solution can be selected from any one or any several mixture in sodium chloride, calcium chloride, natrium nitrosum, the potash calcium nitrate.Described salt solution cools off by dry ice usually.In the present embodiment, described refrigerant is selected liquid nitrogen for use.
Described freezing pipe 2 is wound on sleeve 1 inwall along sleeve 1 longitudinal spiral shape.Concrete structure is as follows: the inwall of described sleeve 1 is staggeredly equipped with several transverse stiffener 31 and several longitudinal stiffeners 32, transverse stiffener 31 and longitudinal stiffener 32 weld together, have several apertures on the described longitudinal stiffener 32, freezing pipe 2 passes described aperture, and freezing pipe 2 is wound on sleeve 1 inwall along sleeve 1 longitudinal spiral shape thus.The shape of cross section of described sleeve 1 is corresponding with the digging implement profile.The cross section of described sleeve 1 can be rectangular circular or oval.In the present embodiment, the cross section of described sleeve 1 is a rectangle.The longitudinal section of described sleeve 1 can be rectangular (sees also Fig. 2 a) or trapezoidal (seeing also Fig. 2 b) or by the big combined shaped (seeing also Fig. 2 c) small in ends in two trapezoidal middle parts that connect to form.In the present embodiment, the longitudinal section of sleeve 1 is a rectangle.
Adopt the digging implement of the above-mentioned antipriming water-stopping method of appearing, comprise the steps: that described digging implement can be shield structure or push pipe, adopt the shield structure in the present embodiment.
Operation one, installation sealing casing are in space enclosing structure door opening peripheral region.
In the present embodiment, space enclosing structure adopts the applying date to be that June 4, application number in 2009 are 200910052546.0, name is called the space enclosing structure in the application for a patent for invention of " space enclosing structure in the hole of being convenient to open the door and job practices thereof, using method ".The space enclosing structure in this hole of being convenient to open the door, described space enclosing structure is made up of door opening part and the peripheral part that is positioned at around the door opening part, described door opening partly be one with digging implement pass in and out the corresponding groove section of required caliber size, described groove section is filled by cement-soil, and some H shaped steel of vertically planting successively in the described groove section constitute the shaped steel barricade that can sealing satisfies the required rigidity of excavation of foundation pit again thus.
Operation two, digging implement are in place, and the head of digging implement arrives at outside the door opening by the sealing casing.
Operation three, interim shutoff is carried out in the space between sealing casing end and the digging implement.Method for blocking is as follows: can clog cotton, flax silk, plastics.If the space is bigger, available steel plate temporary sealing welding.
Operation four, fill toward the space between sealing casing and the digging implement by Grouting Pipe 5 and to freeze slurries.Describedly freeze that slurries are preferred the sort ofly can be frozen into holistic slurries when freezing.Present embodiment, the described slurries mass percent of freezing: 50% cohesive soil, 26% water and 24% particle are less than 0.5 micron iron powder.
Operation five, past freezing pipe 2 inject the refrigerant that is used to freeze slurries.
Described freeze slurries in freezing pipe refrigerant effect under, form rapidly and freeze body.
Operation six, digging implement normally tunnel;
At the space enclosing structure that present embodiment adopted, should after operation five, pull out the H shaped steel in the door opening earlier, so that digging implement normally tunnels.Certainly, if space enclosing structure adopts NOMST worker's method (NovelMaterial Shield-cuttable Tunnel-wall System, be that the shield structure directly cuts new material body of wall method) in carbon fiber reinforcing rib ground wall, then digging implement can directly cut space enclosing structure.And, then need before operation one, manually dig door opening, so that digging implement normally tunnels when adopting common space enclosing structure.
When digging implement was appeared, operating personnel can regulate the refrigerant conveying capacity according to the seepage situation and freeze infiltration, thereby to reach the sealing purpose, control very simple.
Operation seven, the pipeline configuration that is installed on the digging implement rear portion arrive at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure.Wherein, can inject cement paste, i.e. the mixture of cement and water.
Operation eight, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
Adopt the digging implement of above-mentioned antipriming to advance the hole water-stopping method, comprise the steps:
Operation one, the sealing casing is installed, and in the outside of sealing casing one steel is installed and is sealed up a door in space enclosing structure door opening peripheral region.
Operation two, digging implement arrive at steel and seal up a door by door opening, sealing casing successively.
In the present embodiment, pass door opening smoothly, between operation one, need to pull out H shaped steel earlier in order to make digging implement.Certainly, be NOMST worker's method if adopt, then can directly cut door opening with digging implement.And if adopt common space enclosing structure before operation one, to hold door opening successfully.
Operation three, fill toward the space between sealing casing and the digging implement by Grouting Pipe 5 and to freeze slurries.
Operation four, inject toward freezing pipe and to be used to freeze the described refrigerant that freezes slurries, described freeze slurries in freezing pipe refrigerant effect under, form rapidly and freeze body.Described refrigerant is identical with the digging implement used refrigerant of appearing in the water-stopping method.
The digging implement jacking is sealed up a door in operation five, dismounting.
When digging implement was appeared, operating personnel can regulate the refrigerant conveying capacity according to the seepage situation and freeze infiltration, thereby to reach the sealing purpose, control very simple.
Operation six, the pipeline configuration that is installed on the digging implement rear portion arrive at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure.Wherein, can inject cement paste, i.e. the mixture of cement and water.
Operation seven, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
The difference of present embodiment and embodiment 1 is:
See also Fig. 3 and Fig. 4: described freezing pipe 2 is the pipeline of snakelike layout, is the expanded view of snakelike layout freezing pipe 2 as shown in Figure 5.Concrete structure is as follows: described freezing pipe is some pipelines that are distributed in described sleeve lining, and described pipeline is vertically placed along sleeve end to end, and adjacent channel connects by flexible pipe between the head and the tail successively, forms alleged snake pipe usually thus.The inwall of described sleeve 1 is staggeredly equipped with several transverse stiffener 31 and several longitudinal stiffeners 32, transverse stiffener 31 and longitudinal stiffener 32 weld together, and have several apertures on the described transverse stiffener 31, and freezing pipe 2 passes described aperture, thus, form snake pipe.In addition, the cross section of described sleeve 1 is circular.The longitudinal section of sleeve 1 is a rectangle.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (13)
1. a digging implement passes in and out the hole antipriming, the sealing casing that comprises at least one front and back opening, described sealing casing is arranged on the peripheral region of the door opening position of space enclosing structure, and described sealing casing and space enclosing structure are sealedly and fixedly connected, it is characterized in that: described water-baffling sleeve case comprises: the sleeve of a front and back opening and the freezing pipe that is used to inject refrigerant that is arranged at sleeve lining, described sleeve is provided with the Grouting Pipe that is communicated with barrel bore, described space enclosing structure also comprises the peripheral part that is positioned at around the door opening, described door opening be one with digging implement pass in and out the corresponding groove section of required caliber size, described groove section is filled by cement-soil, and some H shaped steel of vertically planting successively in the described groove section.
2. digging implement turnover as claimed in claim 1 hole antipriming, it is characterized in that: described refrigerant is salt solution, liquid nitrogen, liquefied ammonia or freon.
3. digging implement as claimed in claim 2 turnover hole antipriming is characterized in that: described salt solution is selected from any one or several mixture arbitrarily in sodium chloride, calcium chloride, natrium nitrosum, potash, the calcium nitrate.
4. digging implement turnover as claimed in claim 1 hole antipriming, it is characterized in that: described sleeve is provided with insulation layer outward.
5. digging implement turnover as claimed in claim 1 hole antipriming, it is characterized in that: described freezing pipe is wound on sleeve lining along sleeve longitudinal spiral shape.
6. digging implement turnover as claimed in claim 1 hole antipriming, it is characterized in that: described freezing pipe is some pipelines that are distributed in described sleeve lining, and described pipeline is vertically placed along sleeve end to end, adjacent channel head and the tail successively connects.
7. digging implement turnover as claimed in claim 6 hole antipriming is characterized in that: connect by flexible pipe between the described adjacent channel.
8. digging implement turnover as claimed in claim 1 hole antipriming, it is characterized in that: the shape of cross section of described sleeve is corresponding with the digging implement profile.
9. digging implement turnover as claimed in claim 8 hole antipriming is characterized in that: rectangular circular or the oval or Double Circle of the cross section of described sleeve.
10. digging implement as claimed in claim 1 turnover hole antipriming is characterized in that: the longitudinal section of described sleeve is rectangular or trapezoidal or by the big combined shaped small in ends in two trapezoidal middle parts that connect to form.
A water-stopping method 11. digging implement is appeared is characterized in that: adopt antipriming as claimed in claim 1, comprise the steps:
Operation one, installation sealing casing are in space enclosing structure door opening peripheral region;
Operation two, digging implement are in place, and the head of digging implement arrives at outside the door opening by the sealing casing;
Operation three, interim shutoff is carried out in the space between sealing casing end and the digging implement;
Operation four, fill toward the space between sealing casing and the digging implement by Grouting Pipe and to freeze slurries;
Operation five, inject refrigerant toward freezing pipe and make and freeze slurries and form and freeze body;
The jacking forward of operation six, digging implement;
Operation seven, the pipeline configuration that is installed on the digging implement rear portion arrive at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure;
Operation eight, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
The water-stopping method 12. digging implement as claimed in claim 11 is appeared is characterized in that: in the described operation seven, described loss circulation material is cement paste or polyurethane.
13. a digging implement advances the hole water-stopping method, it is characterized in that: adopt antipriming as claimed in claim 1, comprise the steps:
Operation one, the sealing casing is installed, and is installed in a side of sealing casing and to seal up a door in space enclosing structure door opening peripheral region;
Operation two, digging implement arrive at and seal up a door by door opening, sealing casing successively;
Operation three, fill toward the space between sealing casing and the digging implement by Grouting Pipe and to freeze slurries;
Operation four, inject toward freezing pipe and to be used to freeze the described refrigerant that freezes slurries, make and freeze slurries and form and freeze body;
Operation five, dismounting are sealed up a door, and digging implement is jacking forward;
The pipeline configuration at operation six, digging implement rear portion arrives at the sealing casing, and the local loss circulation material that injects is with the space between shutoff door opening and the pipeline configuration outside space enclosing structure;
Seven, stop to inject refrigerant, remove the sealing casing, the permanent plugging structure of constructing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100553827A CN101644161B (en) | 2009-07-24 | 2009-07-24 | Water stopping device for tunneling machine going in and out of tunnel and water stopping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100553827A CN101644161B (en) | 2009-07-24 | 2009-07-24 | Water stopping device for tunneling machine going in and out of tunnel and water stopping method |
Publications (2)
| Publication Number | Publication Date |
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| CN101644161A CN101644161A (en) | 2010-02-10 |
| CN101644161B true CN101644161B (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100553827A Active CN101644161B (en) | 2009-07-24 | 2009-07-24 | Water stopping device for tunneling machine going in and out of tunnel and water stopping method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776181A (en) * | 2010-04-22 | 2010-07-14 | 中建市政建设有限公司 | Waterproof grout-stopping device at jacking pipe entry portal and construction method thereof |
| CN101892846B (en) * | 2010-07-13 | 2011-11-16 | 中铁三局集团有限公司 | Shield burial method for receiving and plugging overexcavation gap in high-water-pressure stratum |
| CN102011600B (en) * | 2010-10-28 | 2013-03-13 | 上海建工集团股份有限公司 | Watertight device of heading machine for passing in and out cavity |
| CN102287190A (en) * | 2011-09-08 | 2011-12-21 | 同济大学 | Method for freezing high-gradient nonhomogeneous freezing wall |
| CN102748038A (en) * | 2012-07-11 | 2012-10-24 | 上海盾构设计试验研究中心有限公司 | Full-recovery shield tunnel enter and exit water stop device |
| CN103573276B (en) * | 2013-11-18 | 2015-09-09 | 北京建工土木工程有限公司 | A kind of mobilism grouting method |
| CN104455724B (en) * | 2014-09-30 | 2016-07-06 | 中铁十八局集团有限公司 | Under high hydraulic condition, push-bench receives device and method of reseptance |
| CN108071400A (en) * | 2016-11-10 | 2018-05-25 | 上海宝冶集团有限公司 | Horizontal freezing consolidation combines shield driving construction method with steel jacket box |
| CN108756955B (en) * | 2018-06-14 | 2023-06-02 | 中交第二航务工程局有限公司 | Gravity type water-stopping blocking structure and method for shield tunnel |
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2009
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