CN107387099A - A kind of shield machine belt pressure reception device - Google Patents
A kind of shield machine belt pressure reception device Download PDFInfo
- Publication number
- CN107387099A CN107387099A CN201710667524.XA CN201710667524A CN107387099A CN 107387099 A CN107387099 A CN 107387099A CN 201710667524 A CN201710667524 A CN 201710667524A CN 107387099 A CN107387099 A CN 107387099A
- Authority
- CN
- China
- Prior art keywords
- shield machine
- cylinder
- end cap
- shield
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention provides a kind of shield machine belt pressure reception device, including receiving sleeve, end cap, elastic sealing device, reaction frame and receiving pedestal, it is characterised in that the distance between the end cap and the elastic sealing device of its nearest neighbours are more than shield machine point of a knife to the distance of anterior shield shell front end；Elastic sealing device is respectively equipped between cylinder and portal ring, between cylinder and shield housing；The reception sleeve connects with portal, and sleeve opposite side is connected with end cap seal, is connected outside end cap with reaction frame；The ferrule barrel is provided with observation panel, filler inlet, discharging tube, and end cap is provided with breast hole, manhole.The product structure of the present invention is simple, is easy to assemble and disassemble, reusable, while can effectively reduce construction risk.
Description
Technical field
The invention belongs to tunnel construction technical field.A kind of more particularly it relates to shield machine belt pressure reception device.
Background technology
Shield machine completes driving section and enters the critical process that received well process is shield method tunnel construction, process construction wind
Danger is the principal risk of shield-tunneling construction, directly affects the success or failure of engineering construction.Conventional shield machine receives work progress：Termination
Stratum consolidation → shield machine cuts to stake → portal stake → sealing cord installation → shield machine appears → shield machine on receive pedestal
The slip casting of → hole.The work progress has the following disadvantages and risk：
（1）Termination stratum consolidation cost is high, long construction period, consolidation effect can not accurate judgement, and limited by ground environment condition
System；
（2）It is larger by formation condition restriction when portal is cut, greater risk be present；
（3）Shield machine is larger to stratum interference during appearing, and easily causes larger sedimentation, or even segment deformation, fragmentation；
（4）The construction can not or stratum larger in underground water it is unstable under conditions of carry out, special construction method need to be taken.
Shield machine is carried out in good ground using conventional method and receives basic feasible solution, but due to native in shield receive process
Pressure is gradually lowered to zero so that the accident such as easily occur caving in when receiving, the easy bigger thing of appearance if with the presence of underground water
Therefore.
In addition, increasing with the buried depth of underground engineering, underground water is extremely complex and the bad engineering such as drift sand easily occur
Matter phenomenon, traditional shield receive mode, can not meet that shield when buried depth is big receives, safety problem is more prominent.
For there is the construction environment of underground water, shield machine receive process are very risky, easily occur cave in, seep water, metalling run out
Equivalent risk, conventional method of reseptance of directly appearing can not meet that safety in production requires, before patent（CN200920058408 is a kind of
For shield machine closed origin and the device of arrival；A kind of casings of CN201210278021 and water rich strata shield casing receive
Method）Band ballasting method of reseptance, equipment is excessively heavy, it is necessary to larger receipt area, for lifting condition restricted clearance, it is difficult to
Implement.Above-identified patent technology meets that reducing leak leaks husky risk requirement, but huge structure, and work is assembled and disassembled for the vertical shaft of the confined space
Bring difficulty, invention is a kind of simple in construction, is easy to assemble and disassemble, while have very much must for the reception device with pressure that can reduce construction risk
Will.
The content of the invention
The present invention is intended to provide a kind of shield machine belt pressure reception device, including sleeve, end cap and elastic sealing device are received, it is special
Levy and be between institute 1, the reception ferrule barrel and portal ring, be respectively equipped with elastic packing dress between cylinder and shield housing
Put, the distance between elastic sealing device of the end cap and its nearest neighbours is more than cutter head of shield machine front end to anterior shield shell housing
The distance of front end, elastic sealing device is respectively equipped between cylinder and portal ring, between cylinder and shield housing.
Further, the distance between the end cap and the elastic sealing device of its nearest neighbours are less than cutter head of shield machine front end
To the admedian distance in shield machine anterior shield shell housing footpath.
Further, the reception sleeve connects with portal, and the other end is connected with end cap seal, end cap outside and reaction frame phase
Even；The ferrule barrel is provided with observation panel, filler inlet, discharging tube, and end cap is provided with breast hole, manhole.
Further, the elastic sealing device is elastic packing utricule, and each elastic packing utricule is along ferrule barrel
It is arranged circumferentially, is detachably secured on cylinder；Utricule is sealed provided with least one circle on the outside of cylinder, ensures hole and cylinder outside
Sealing；At least two circles are provided with the inside of cylinder and seal utricule, ensure the sealing between cylinder and shield machine housing, and the elasticity is close
Ferrule barrel between encapsulated body is provided with Grouting Pipe.The elastic packing utricule is provided with fluid charge and discharge mouth, and the fluid fills
Put and flow control valve is provided with mouth.
Further, the end cover structure determines according to the form of the cutter head of shield machine received, can be planar structure, sphere
The combination of structure, pyramidal structure or several forms.Further, the ferrule barrel is provided with reinforcement, cylinder be integrally formed or
It is spliced by two and ARCS of the above with reinforcement；Connected between cylinder and portal, end cap by flange.
The invention further relates to a kind of method that shield machine is received using above-mentioned shield machine belt pressure reception device, it is main include with
Lower step：
Step 1：Before shield machine supports stake, installation receives sleeve, sealing device, end cap, reaction frame and other reception corollary apparatus；
Step 2：Inner barrel utricule is not pressurized, and utricule pressurization outside cylinder, is filled in the space of sleeve, end cap and hole composition
Filler to shield machine pressure balance value, shield machine is pushed ahead, while shield machine soil-discharging device is normally unearthed, shield machine belt pressure
Into sleeve, to anterior shield shell forward position by all sealing utricule in sleeve, pressurizeed to utricule, slip casting between utricule, sealing device makes
Sealed between shield shell and sleeve in place, anterior fill material is excluded by shield machine system of being unearthed, makes anterior gradual pressure release；
Step 3：Breast hole is opened, clears up remaining filler.After cleaning out, reaction frame, end cap are removed；Installation receives pedestal, shield
Structure machine, which continues to be advanced on front portion, receives pedestal；
Step 4：Shield machine is pushed ahead to last ring pipe sheet assembling and completed, and shield continues to promote, and is protected to two ring tail sealings
Sealing function is held, stops promoting；Slip casting, benefit slurry outside section of jurisdiction, treat that slurries reach some strength, shield machine continues to be advanced into abjection pipe
Piece, it is each to seal utricule pressure release；The completely out reception sleeve of last shield, removes reception device, and hole ring beam pours, and completes shield
Receive work.
Further, articulated shield machine is received according to the shield machine belt pressure reception device in the above method, then it receives shield
The method of machine comprises the following steps：Step 1：Before shield machine supports stake, installation receives sleeve, sealing device, end cap and other receptions
Corollary apparatus；
Step 2：Inner barrel utricule is not pressurized, and makes to seal with portal ring on the outside of sleeve to utricule pressurization outside cylinder, sleeve,
End cap is pushed ahead with filling filler to shield machine pressure balance value, shield machine in the space of hole composition, while shield machine is arranged
Native device is normally unearthed, shield machine excision portal stake, and it is with pressure enter reception device, to anterior shield shell forward position pass through in sleeve whole
Utricule is sealed, is pressurizeed to utricule, slip casting between utricule, sealing device makes to seal in place between shield shell and sleeve, is unearthed by shield machine
System excludes anterior filler, makes anterior gradual pressure release；
Step 3：Breast hole is opened, clears up leftover materials.After cleaning out, reaction frame, end cap are removed；Installation receives pedestal, shield
Structure machine continues to push ahead, shield machine front portion top base, continues to be advanced into sealing utricule close near the be hinged seam of shield shell, in stopping
Slip casting between portion's utricule, the utricule pressure release closed on, shield, which continues to be advanced into pressure release utricule, is completely nested backing shell, is filled again for it
Pressure, after confirming sealing, lower road utricule pressure release, continue to be advanced into the utricule and be inserted in backing shell, pressurising；
Step 4：Shield machine is pushed ahead to last ring pipe sheet assembling and completed, and shield continues to promote, and is protected to two ring tail sealings
Hold sealing function, stop promoting, the outer slip casting in section of jurisdiction, mend and starch, treat that grout cures reach some strength, shield machine continues to be advanced into de-
Go out section of jurisdiction, it is each to seal utricule pressure release；
Step 5：Shield machine continues to be advanced into completely out reception sleeve；Remove reception device.Hole ring beam pours, and completes shield
Receive work.
The shield machine belt pressure reception device of the present invention, shield starting overall process keeps earth pressure balance, simple in construction, is easy to fill
Tear open, device is reusable, does not produce reinforcing and removes waste material, meets energy-conservation and environmental requirement, can effectively reduce construction risk.
Brief description of the drawings
Fig. 1 is the front view schematic diagram of the shield machine belt pressure reception device of the present invention.
Fig. 2 is the right view schematic diagram of the shield machine belt pressure reception device of the present invention.
Fig. 3 is the partial enlarged drawing of A in Fig. 1.
Fig. 4 is the schematic diagram of shield machine belt pressure reception device involved by steps 1 and 2 in embodiments of the invention 3.
Fig. 5 is the schematic diagram of shield machine belt pressure reception device involved by step 3 in embodiments of the invention 3.
Embodiment
Embodiment 1：
The present embodiment provides a kind of shield machine belt pressure reception device as shown in Figure 1-Figure 3, including receives sleeve 1, end cap 2 and elasticity
Sealing device 4, it is characterised in that before reception sleeve 1 axial length arrives shield machine anterior shield shell slightly larger than cutter head of shield machine tip
The distance at end, it is ensured that after shield machine anterior shield shell forward position is by whole sealing devices, cutterhead front end is without impinging on end cap 2；Cylinder with
Elastic sealing device 4 is respectively equipped between portal ring, between cylinder and shield housing；The reception sleeve 1 connects with portal, hole
Door opposite side installation end cap 2, the outside of end cap 2 is connected with reaction frame 3；The reception sleeve 1 is provided with observation panel 11, filler injects
Mouth 12, the bottom of end cap 2 are provided with breast hole 21, manhole.
Embodiment 2：
The present embodiment provides a kind of shield machine belt pressure reception device, and its mentality of designing is substantially same as Example 1, and difference is this
Elastic sealing device described in embodiment is elastic packing utricule, and each elastic packing utricule is set along ferrule barrel ring
Put, be detachably secured on cylinder；At least one circle is provided with the outside of cylinder and seals utricule, ensure hole ring with it is close on the outside of cylinder
Envelope；At least two circles are provided with the inside of cylinder and seal utricule, ensure the sealing between cylinder and shield machine housing, and the elastic packing capsule
Ferrule barrel between body is provided with Grouting Pipe.The elastic packing utricule is provided with fluid charge and discharge mouth, the fluid charge and discharge mouth
Place is provided with flow control valve.
Embodiment 3：
As Figure 1-Figure 5, the present embodiment provides a kind of shield machine belt pressure and receives the method that sleeve receives shield machine, including following
Step：
Step 1：Before shield machine supports stake, installation sleeve 1, sealing device 4, end cap 2, reaction frame 3 and other reception corollary apparatus；
Step 2：Inner barrel utricule 42 and 43 is not pressurized, and utricule 41 pressurizes outside cylinder, is formed at sleeve 1, end cap 2 and hole
Space in filling filler to shield machine pressure balance value, shield machine push ahead, while shield machine casting system is normally unearthed,
Shield machine belt pressure enters sleeve, to anterior shield shell forward position by all sealing utricule in sleeve, is pressurizeed to utricule 42 and utricule 43, capsule
Slip casting between body, sealing device make to seal between shield shell and sleeve in place, exclude anterior fill material by shield machine system of being unearthed, make
Anterior gradual pressure release；
Step 3：Breast hole 21 is opened, clears up remaining filler.After cleaning out, reaction frame 3, end cap 2 are removed, installation receives pedestal
5.Shield machine continues to be advanced into reception pedestal 5 on front portion；
Step 4：Shield machine is pushed ahead to last ring pipe sheet assembling and completed, and shield continues to promote, and is protected to two ring tail sealings
Sealing function is held, stops promoting；Slip casting, benefit slurry outside section of jurisdiction, treat that slurries reach some strength, shield machine continues to be advanced into abjection pipe
Piece, it is each to seal utricule pressure release；Last shield is completely out to receive sleeve 1, removes reception device 5, and hole ring beam pours, and completes shield
Structure receives work.
Embodiment 4：
Further, articulated shield machine is received according to the shield machine belt pressure reception device in the above method, then it receives shield
The method of machine comprises the following steps：
Step 1：Before shield machine supports stake, installation receives sleeve 1, sealing device 4, end cap 2 and other reception corollary apparatus；
Step 2：Inner barrel utricule 42 and 43 is not pressurized, and is made to the pressurization of utricule 41 outside cylinder close with portal ring on the outside of sleeve
Envelope, filling filler to shield machine pressure balance value, shield machine is pushed ahead in the space of sleeve 1, end cap 2 with hole composition,
Simultaneously shield machine casting system be normally unearthed, shield machine excision portal stake, and it is with pressure enter reception device, lead to anterior shield shell forward position
Cross and utricule is all sealed in sleeve, pressurizeed to utricule 42 and 43, slip casting between utricule, sealing device makes to be sealed between shield shell and sleeve
Position, anterior filler is excluded by shield machine casting system, make anterior gradual pressure release；
Step 3：Breast hole 21 is opened, clears up leftover materials.After cleaning out, reaction frame 3, end cap 2 are removed；Installation receives pedestal
5, shield machine continues to push ahead, shield machine front portion top base 5, continues to be advanced into sealing utricule close near the be hinged seam of shield shell,
Stop slip casting between internal utricule, the utricule pressure release closed on, shield, which continues to be advanced into pressure release utricule, is completely nested backing shell, again for
Its pressurising, after confirming sealing, lower road utricule pressure release, continue to be advanced into the utricule and be inserted in backing shell, pressurising；
Step 4：Shield machine is pushed ahead to last ring pipe sheet assembling and completed, and shield continues to promote, and is protected to two ring tail sealings
Hold sealing function, stop promoting, the outer slip casting in section of jurisdiction, mend and starch, treat that grout cures reach some strength, shield machine continues to be advanced into de-
Go out section of jurisdiction, it is each to seal utricule pressure release；
Step 5：Shield machine continues to be advanced into completely out reception sleeve 1；Remove reception device 5.Hole ring beam pours, and completes shield
Structure receives work.
Claims (6)
1. a kind of shield machine belt pressure reception device, including receive sleeve, end cap, elastic sealing device and receive pedestal, its feature
It is between the reception ferrule barrel and portal ring, is respectively equipped with elastic sealing device between cylinder and shield housing, it is described
The distance between end cap and the elastic sealing device of its nearest neighbours are more than cutter head of shield machine front end to anterior shield shell housing forward end
Distance, elastic sealing device is respectively equipped between cylinder and portal ring, between cylinder and shield housing.
2. a kind of shield machine belt pressure reception device as claimed in claim 1, it is characterised in that the end cap and its nearest neighbours
The distance between elastic sealing device is less than cutter head of shield machine front end to the admedian distance in shield machine anterior shield shell housing footpath.
3. a kind of shield machine belt pressure reception device as claimed in claim 1, it is characterised in that the reception sleeve and portal phase
Connect, the other end is connected with end cap seal, is connected outside end cap with reaction frame；The ferrule barrel is provided with observation panel, filler is noted
Entrance, discharging tube, end cap are provided with breast hole, manhole.
4. a kind of shield machine belt pressure reception device as claimed in claim 1, it is characterised in that the elastic sealing device is bullet
Property sealing utricule, at least one circle is provided with the outside of cylinder and seals utricule, ensures hole and the sealing on the outside of cylinder；It is provided with the inside of cylinder
At least two circle sealing utricules, ensure the sealing between cylinder and shield machine housing；Each elastic packing utricule is along sleeve cylinder
The internal diameter or external diameter of body are arranged circumferentially, and are detachably secured on cylinder；The elastic packing capsule is provided with fluid charge and discharge mouth.
5. a kind of shield machine belt pressure as claimed in claim 1 or 2 receives sleeve, it is characterised in that the outside for receiving sleeve
Provided with gusset reinforcement structure.
6. a kind of shield machine belt pressure as claimed in claim 1 receives sleeve, it is characterised in that the ferrule barrel, which is provided with, to be added
Strengthening tendons, cylinder are integrally formed or are spliced by two and ARCS of the above with reinforcement；Between cylinder and portal, end cap
Connected by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710667524.XA CN107387099A (en) | 2017-08-07 | 2017-08-07 | A kind of shield machine belt pressure reception device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710667524.XA CN107387099A (en) | 2017-08-07 | 2017-08-07 | A kind of shield machine belt pressure reception device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107387099A true CN107387099A (en) | 2017-11-24 |
Family
ID=60345009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710667524.XA Withdrawn CN107387099A (en) | 2017-08-07 | 2017-08-07 | A kind of shield machine belt pressure reception device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107387099A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019213A (en) * | 2017-12-22 | 2018-05-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | A kind of portal abnormal shape sleeve arrangement |
| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004316318A (en) * | 2003-04-18 | 2004-11-11 | Shimizu Corp | Arrival section structure of arrival shaft and arrival method for shield machine |
| JP2006063672A (en) * | 2004-08-27 | 2006-03-09 | Maeda Corp | Arrival method for shield machine, and entrance equipment |
| JP2011132692A (en) * | 2009-12-22 | 2011-07-07 | Ohbayashi Corp | Water cut-off structure and water cut-off method |
| CN203441506U (en) * | 2013-08-20 | 2014-02-19 | 北京深林开物市政工程有限公司 | Tube pushing machine hole-out slurry stopping sealing receiving device |
| CN106640097A (en) * | 2016-08-31 | 2017-05-10 | 中铁二院工程集团有限责任公司 | Novel shield balanced originating and receiving sleeve device |
| CN207212338U (en) * | 2017-08-07 | 2018-04-10 | 北京市市政四建设工程有限责任公司 | A kind of shield machine belt pressure reception device |
-
2017
- 2017-08-07 CN CN201710667524.XA patent/CN107387099A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004316318A (en) * | 2003-04-18 | 2004-11-11 | Shimizu Corp | Arrival section structure of arrival shaft and arrival method for shield machine |
| JP2006063672A (en) * | 2004-08-27 | 2006-03-09 | Maeda Corp | Arrival method for shield machine, and entrance equipment |
| JP2011132692A (en) * | 2009-12-22 | 2011-07-07 | Ohbayashi Corp | Water cut-off structure and water cut-off method |
| CN203441506U (en) * | 2013-08-20 | 2014-02-19 | 北京深林开物市政工程有限公司 | Tube pushing machine hole-out slurry stopping sealing receiving device |
| CN106640097A (en) * | 2016-08-31 | 2017-05-10 | 中铁二院工程集团有限责任公司 | Novel shield balanced originating and receiving sleeve device |
| CN207212338U (en) * | 2017-08-07 | 2018-04-10 | 北京市市政四建设工程有限责任公司 | A kind of shield machine belt pressure reception device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019213A (en) * | 2017-12-22 | 2018-05-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | A kind of portal abnormal shape sleeve arrangement |
| CN114810112A (en) * | 2022-06-28 | 2022-07-29 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
| CN114810112B (en) * | 2022-06-28 | 2022-10-21 | 北京建工土木工程有限公司 | Device for chiseling enclosure structure at shield end well opening and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105736004B (en) | Shield is opened a position pressurize panelling construction method with weighing apparatus shield mud air pressure | |
| CN102536253B (en) | Construction method of earth cabin back filling and cabin entering operation during earth pressure shielding | |
| CN107605507B (en) | Service channel shield-tunneling construction receives structure and construction method | |
| CN107605498B (en) | Construction method for horizontal grouting reinforcement structure of end head of shield tunnel in water-rich sandy pebble stratum | |
| CN103195455B (en) | Weak geological environment large cross-section tunnel construction supporting system and construction method | |
| CN103775096B (en) | A kind of shield launching method of soft layer | |
| CN103437339A (en) | Construction method for sealing karst cave near trench wall of underground continuous wall in karst stratum | |
| CN107120121A (en) | A kind of shield-tunneling construction supplements slip casting anti-settling control method in real time | |
| CN207212338U (en) | A kind of shield machine belt pressure reception device | |
| CN106761918A (en) | A kind of tunnel solution cavity and Groundwater Comprehensive administer construction and construction method | |
| CN106812540B (en) | Shield initial plain wall sealing water-stopping reinforcing structure and construction process | |
| CN109403997A (en) | Earth pressure balanced shield, EPBS warehouse entry construction method | |
| CN102635327A (en) | Grouting method and system of cracked coal rock mass | |
| AU2021355609B2 (en) | Method for mining by filling and caving | |
| CN107387099A (en) | A kind of shield machine belt pressure reception device | |
| CN206592136U (en) | A kind of plain wall closing water sealing consolidation structure of shield launching | |
| CN105257309B (en) | In a kind of layer of sand in balancing earth-pressure shielding machine storehouse slip casting tool changing construction method | |
| CN107060792A (en) | A kind of drilling type experimental rig and method for shield model test | |
| CN206608175U (en) | Shield machine reaches reception short sleeve device | |
| CN105041327B (en) | Bored tunnel is counter to dig shield method of reseptance | |
| CN104895577B (en) | A kind of electric discharge broken rock tunnels shield head with water-stop | |
| CN207315381U (en) | A kind of shield launching sealing device | |
| CN206753653U (en) | A kind of tunnel solution cavity and Groundwater Comprehensive administer construction | |
| CN108979646A (en) | Shield machine soil storehouse medium method of replacing in a kind of refrigerating process | |
| CN206328766U (en) | A kind of pipe well well-sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171124 |