CN112392495A - Synchronous grouting device arranged in shield body - Google Patents
Synchronous grouting device arranged in shield body Download PDFInfo
- Publication number
- CN112392495A CN112392495A CN202011545222.3A CN202011545222A CN112392495A CN 112392495 A CN112392495 A CN 112392495A CN 202011545222 A CN202011545222 A CN 202011545222A CN 112392495 A CN112392495 A CN 112392495A
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- CN
- China
- Prior art keywords
- protection casing
- flushing pipe
- pipe
- fixedly connected
- shield body
- 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.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 22
- 238000011010 flushing procedure Methods 0.000 claims abstract description 82
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 238000007569 slipcasting Methods 0.000 claims abstract description 13
- 239000010687 lubricating oil Substances 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of grouting, and discloses a synchronous grouting device arranged in a shield body, which comprises a grouting body, an upper baffle plate and a protective cover, wherein a lubricating oil pipeline is arranged inside the protective cover, a flushing pipe is arranged inside the protective cover, a guide device is arranged on the side surface of the flushing pipe, a flushing pipe pressing block is arranged on the side surface of the flushing pipe, a double-acting oil cylinder is fixedly arranged on the front surface of the upper baffle plate, a stroke limiting device is fixedly arranged on the front surface of the upper baffle plate, and a positioning stop block is fixedly arranged on the front surface of the upper baffle plate. This arrange synchronous slip casting device in shield body through the mutual cooperation between slip casting body, overhead gage, protection casing, lubricating oil pipeline, flushing pipe and the mortar pipe to weld slip casting body, guard plate and overhead gage as a whole, make the device structure more firm, all set up lubricating oil pipeline, flushing pipe and mortar pipe in the protection casing simultaneously, avoided the striking of foreign object, protected the pipeline.
Description
Technical Field
The invention relates to the technical field of grouting, in particular to a synchronous grouting device arranged in a shield body.
Background
At present, with the mass construction of domestic and foreign tunnels, a shield machine becomes the first choice equipment for excavation, and the construction safety and the control of the settlement of the earth surface are particularly important in the construction; when the shield machine tunnels, because the diameter of the excavation surface of the cutter head is larger than the outer diameter of the segment, a gap exists between the segment and a tunnel stratum, particularly in some pebble stratums, pebbles have poor self-stability and are easy to fall off; in addition, the sandy gravel layer is a highly permeable layer, such as a stratum rich in water, and due to the fact that the content of fine particles is low, dregs capable of stopping water are not easily formed naturally, instability of an excavation surface is caused, and ground surface settlement is not easy to control, a synchronous grouting device arranged in the shield body is needed to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the synchronous grouting device arranged in the shield body, which has the advantages of synchronously grouting a stratum with large permeability and a stratum with a formed cavity, filling the gap between the duct piece and the stratum in time and the like, and solves the problem that the gap exists between the duct piece and the tunnel stratum because the diameter of the excavation surface of the cutter head is larger than the outer diameter of the duct piece when the shield machine tunnels.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an arrange shield internal synchronous slip casting device in, includes grout body, overhead gage and protection casing, the inside of protection casing is provided with lubricating oil pipeline, the inside of protection casing is provided with the flushing pipe, the side surface of flushing pipe is provided with guider, the side surface of flushing pipe is provided with the flushing pipe compact heap, the positive fixed mounting of overhead gage has double-acting oil cylinder, the positive fixed mounting of overhead gage has stroke stop device, the positive fixed mounting of overhead gage has the location dog, the inside wall fixedly connected with guide ring of protection casing, the inside of protection casing is provided with the mortar pipe, the left end fixedly connected with mortar hose of mortar pipe.
Preferably, the protection casing includes protection casing right side board and protection casing left side board, one side fixedly connected with protection casing roof, protection casing baffle and protection casing bottom plate that protection casing right side board and protection casing left side board are relative, the protection casing roof is located the protection casing baffle directly over, the protection casing baffle is located the protection casing bottom plate directly over.
Preferably, the guiding device comprises a guiding fixed seat, the guiding fixed seat is fixedly connected with the protective cover through a screw, and a guiding key is arranged on the side surface of the guiding fixed seat.
Preferably, a flushing pipe piston is arranged at the right end of the flushing pipe, the flushing pipe piston is connected with the inside of the flushing pipe through a set screw, a flushing water outlet is formed in the inner side wall of the flushing pipe, and a sealing piece is fixedly connected to the side surface of the flushing pipe piston.
Preferably, the flushing pipe pressing block comprises a flushing pipe lower pressing block and a flushing pipe upper pressing block, the flushing pipe lower pressing block is fixedly connected with the right side plate of the protective cover through a first screw, and the flushing pipe upper pressing block is fixedly connected with the left side plate of the protective cover through a second screw.
Preferably, the positioning stop block comprises an upper positioning stop block and a lower positioning stop block, the upper positioning stop block is fixedly connected with the lower positioning stop block through a third screw, and the rear side of the lower positioning stop block is fixedly connected with the front side of the upper baffle plate.
Preferably, an electromagnetic proximity switch is arranged on the side surface of the travel limiting device, and the travel limiting device is fixedly connected with the upper baffle through a fourth screw.
Compared with the prior art, the invention provides a synchronous grouting device arranged in a shield body, which has the following beneficial effects:
1. this arrange synchronous slip casting device in shield body mutually supports through slip casting body, overhead gage, protection casing, lubricating oil pipeline, flushing pipe and mortar pipe to weld slip casting body, guard plate and overhead gage as a whole, make the device structure more firm, all set up lubricating oil pipeline, flushing pipe and mortar pipe in the protection casing simultaneously, thereby avoided the striking of foreign object, protected the pipeline.
2. According to the synchronous grouting device arranged in the shield body, the flushing pipeline and the back flushing piston mechanism can be combined into a whole to form the flushing pipe through the mutual matching of the lubricating oil pipeline, the guide device, the flushing pipe piston, the flushing water outlet, the sealing element, the flushing pipe pressing block and the double-acting oil cylinder, so that the processing cost is saved, and the installation space is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view of the structure taken along the line A-A in FIG. 1 according to the present invention;
FIG. 3 is a sectional view of the structure of the plane B-B in FIG. 1 according to the present invention;
FIG. 4 is a cross-sectional view of the structure of FIG. 1 taken along the plane C-C;
FIG. 5 is an enlarged view of the structure of FIG. 1 at A according to the present invention;
FIG. 6 is a cross-sectional view of the double acting cylinder configuration of the present invention;
fig. 7 is a structural sectional view of the stroke limiting device of the invention.
Wherein: 1. grouting; 2. lubricating the oil pipeline; 3. a guide device; 31. a screw; 32. a guide fixing seat; 33. a guide key; 4. a flush tube; 41. a washpipe piston; 42. tightening the screw; 43. a flushing water outlet; 44. a seal member; 5. a flushing pipe compression block; 51. a pressing block under the flushing pipe; 52. a second screw; 53. a pressing block is arranged on the flushing pipe; 54. a first screw; 6. a double-acting oil cylinder; 7. an upper baffle plate; 8. a stroke limiting device; 81. an electromagnetic proximity switch; 82. a fourth screw; 9. positioning a stop block; 91. an upper positioning stop block; 92. a lower positioning stop block; 93. a third screw; 10. a protective cover; 101. a shield top plate; 102. a right side plate of the protective cover; 103. a shield enclosure; 104. a left side plate of the protective cover; 105. a shield base plate; 11. a guide ring; 12. a mortar pipe; 13. and (4) a mortar hose.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, a synchronous grouting device disposed in a shield body comprises a grouting body 1, an upper baffle 7 and a shield 10, wherein the grouting body 1 is disposed on the right side of the shield 10, the upper baffle 7 is disposed on the left side of the shield 10, the grouting body 1, the shield 10 and the upper baffle 7 are welded into a whole, three sides are welded and then finish-machined in order to ensure that the shield 10 is not deformed during welding, finally a shield left side plate 104 or a shield right side plate 102 is welded in a water cooling manner, the shield 10 comprises a shield right side plate 102 and a shield left side plate 104, a shield top plate 101, a shield partition plate 103 and a shield bottom plate 105 are fixedly connected to the opposite sides of the shield right side plate 102 and the shield left side plate 104, the shield top plate 101 is disposed directly above the shield partition plate 103, the shield partition plate 103 is disposed directly above the shield bottom plate 105, a lubricating oil pipe 2 is, the lubricating oil pipeline 2 is arranged, the service life of a sealing piece 44 can be prolonged, friction in the motion process is reduced, the flushing pipe 4 is arranged inside the protective cover 10, the flushing pipe 4 is formed by connecting multiple sections of pipelines through threads, the right end of the flushing pipe 4 is provided with a flushing pipe piston 41, the flushing pipe piston 41 is connected with the inside of the flushing pipe 4 through a set screw 42, the flushing pipe piston 41 is inserted into the flushing pipe 4 to form a sealed flushing mechanism, the right end of the sealed flushing mechanism is sealed and hollow, a flushing water outlet 43 is formed in the inner side wall of the flushing pipe 4, the sealing piece 44 is fixedly connected to the side surface of the flushing pipe piston 41, and the sealing piece 44 is also arranged inside the flushing pipe 4.
The side surface of the flushing pipe 4 is provided with a guiding device 3, the rotation of the flushing pipe 4 during movement is ensured by arranging the guiding device 3, the guiding device 3 comprises a guiding fixed seat 32, the guiding fixed seat 32 is fixedly connected with the protective cover 10 through a screw 31, the side surface of the guiding fixed seat 32 is provided with a guiding key 33, the side surface of the flushing pipe 4 is provided with a flushing pipe pressing block 5, the flushing pipe pressing block 5 comprises a flushing pipe lower pressing block 51 and a flushing pipe upper pressing block 53, the flushing pipe lower pressing block 51 is fixedly connected with the right side plate 102 of the protective cover through a first screw 54, the flushing pipe upper pressing block 53 is fixedly connected with the left side plate 104 of the protective cover through a second screw 52, so that the flushing pipe 4 can be fixed between the right side plate 102 of the protective cover and the left side plate 104 of the protective cover, and the flushing pipe 4 is pressed and fixed through the flushing pipe pressing block 5, the washing pipe 4 is guaranteed to linearly reciprocate under the driving of the double-acting oil cylinder 6, the double-acting oil cylinder 6 is fixedly installed on the front face of the upper baffle plate 7, the left end of the washing pipe 4 is communicated with the right side of the double-acting oil cylinder 6, the double-acting oil cylinder 6 is externally connected with high-pressure cleaning liquid, the stroke limiting device 8 is fixedly installed on the front face of the upper baffle plate 7, the stroke limiting device 8 is externally connected with a control cabinet, the electromagnetic proximity switch 81 is connected with the control cabinet, signals are transmitted to the control cabinet through the electromagnetic proximity switch 81, real-time control is achieved, the side surface of the stroke limiting device 8 is provided with the electromagnetic proximity switch 81, and the stroke limiting device 8 is fixedly.
The front of the upper baffle 7 is fixedly provided with a positioning stop block 9, the positioning stop block 9 comprises an upper positioning stop block 91 and a lower positioning stop block 92, the upper positioning stop block 91 is fixedly connected with the lower positioning stop block 92 through a third screw 93, the rear side of the lower positioning stop block 92 is fixedly connected with the front of the upper baffle 7, the upper positioning stop block 91 is provided with a step, a clamping groove is arranged on the mortar pipe 12 at the corresponding position, the step is matched with the clamping groove to fix the mortar pipe 12, the inner side wall of the protective cover 10 is fixedly connected with a guide ring 11, the mortar pipe 12 is arranged inside the protective cover 10, the number of the guide rings 11 is multiple, the side surface of the mortar pipe 12 is lapped with the inner side wall of the guide ring 11, so that the positioning guide of the mortar pipe 12 during installation and removal can be ensured, the left end of the mortar pipe 12 is fixedly connected with a mortar hose 13, one end of the mortar hose 13 far away, thereby make mortar pipe 12 and mortar pump pass through mortar hose 13 intercommunication, the right-hand member of mortar pipe 12 is located the inside of slip casting 1, the inside of slip casting 1 is provided with mortar passageway and sealed washing channel, the right-hand member and the mortar passageway of sealed washing channel communicate each other, the right side of slip casting 1 is provided with the thick liquid spout, the thick liquid spout communicates each other with sealed washing channel, the right-hand member of flushing pipe 4 is located the inside of sealed washing channel, the synchronous slip casting device of arranging in the shield body is opened at the shield body inboard has observation window, and mortar pipe 12 and flushing pipe 4 all can singly observe the window and demolish the change alone.
When the synchronous grouting device is used, when the synchronous grouting device is used for grouting operation, the double-acting oil cylinder 6 pulls the flushing pipe 4 to finally drive the flushing pipe piston 41 to move towards the left end of the flushing pipe 4, so that the left side of the flushing pipe piston 41 is positioned at a liquid outlet of the mortar pipe 12, the electromagnetic proximity switch 81 sends a signal to the control cabinet, and then the hydraulic system stops driving the double-acting oil cylinder 6, so that mortar is sprayed by a mortar pump, is conveyed to a mortar outlet through the mortar pipe 12 and is continuously output to a full gap; when grouting is stopped, the control cabinet sends a signal to the hydraulic system to drive the double-acting oil cylinder 6 to move, so that the flushing pipe piston 41 is driven to move towards the grout outlet, and residual mortar on the inner wall of the flushing pipe 4 is cleaned when the flushing pipe piston 41 moves; when the right side of the flushing pipe piston 41 is flush with the mortar outlet, the electromagnetic proximity switch 81 sends a signal to the control cabinet, then the hydraulic system stops driving the double-acting oil cylinder 6, and the cleaning liquid is sprayed out from the flushing water outlet 43, so that the mortar pipe 12 is cleaned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a arrange synchronous slip casting device in shield body, includes slip casting body (1), overhead gage (7) and protection casing (10), its characterized in that: the inside of protection casing (10) is provided with lubricating oil pipeline (2), the inside of protection casing (10) is provided with flushing pipe (4), the side surface of flushing pipe (4) is provided with guider (3), the side surface of flushing pipe (4) is provided with flushing pipe compact heap (5), the positive fixed mounting of overhead gage (7) has double-acting hydro-cylinder (6), the positive fixed mounting of overhead gage (7) has stroke stop device (8), the positive fixed mounting of overhead gage (7) has location dog (9), the inside wall fixedly connected with guide ring (11) of protection casing (10), the inside of protection casing (10) is provided with mortar pipe (12), the left end fixedly connected with mortar hose (13) of mortar pipe (12).
2. The synchronous grouting device arranged in a shield body according to claim 1, wherein: the protection casing (10) include protection casing right side board (102) and protection casing left side board (104), one side fixedly connected with protection casing roof (101), protection casing baffle (103) and protection casing bottom plate (105) that protection casing right side board (102) and protection casing left side board (104) are relative, protection casing roof (101) are located protection casing baffle (103) directly over, protection casing baffle (103) are located protection casing bottom plate (105) directly over.
3. The synchronous grouting device arranged in a shield body according to claim 1, wherein: guider (3) are including direction fixing base (32), direction fixing base (32) pass through screw (31) and protection casing (10) fixed connection, the side surface of direction fixing base (32) is provided with guide key (33).
4. The synchronous grouting device arranged in a shield body according to claim 1, wherein: the right end of the flushing pipe (4) is provided with a flushing pipe piston (41), the flushing pipe piston (41) is connected with the inside of the flushing pipe (4) through a set screw (42), a flushing water outlet (43) is formed in the inner side wall of the flushing pipe (4), and a sealing piece (44) is fixedly connected to the side surface of the flushing pipe piston (41).
5. The synchronous grouting device arranged in the shield body according to claim 2, wherein: the washing pipe pressing block (5) comprises a washing pipe lower pressing block (51) and a washing pipe upper pressing block (53), the washing pipe lower pressing block (51) is fixedly connected with the right side plate (102) of the protective cover through a first screw (54), and the washing pipe upper pressing block (53) is fixedly connected with the left side plate (104) of the protective cover through a second screw (52).
6. The synchronous grouting device arranged in a shield body according to claim 1, wherein: the positioning stop block (9) comprises an upper positioning stop block (91) and a lower positioning stop block (92), the upper positioning stop block (91) is fixedly connected with the lower positioning stop block (92) through a third screw (93), and the rear side of the lower positioning stop block (92) is fixedly connected with the front side of the upper stop plate (7).
7. The synchronous grouting device arranged in a shield body according to claim 1, wherein: an electromagnetic proximity switch (81) is arranged on the side surface of the stroke limiting device (8), and the stroke limiting device (8) is fixedly connected with the upper baffle (7) through a fourth screw (82).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202011545222.3A CN112392495A (en) | 2020-12-23 | 2020-12-23 | Synchronous grouting device arranged in shield body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202011545222.3A CN112392495A (en) | 2020-12-23 | 2020-12-23 | Synchronous grouting device arranged in shield body |
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CN112392495A true CN112392495A (en) | 2021-02-23 |
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CN202011545222.3A Pending CN112392495A (en) | 2020-12-23 | 2020-12-23 | Synchronous grouting device arranged in shield body |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114392987A (en) * | 2021-12-31 | 2022-04-26 | 江苏重亚重工有限公司 | Comprehensive pipeline spraying and cleaning device for shield machine |
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---|---|---|---|---|
JP2006291636A (en) * | 2005-04-14 | 2006-10-26 | Mitsubishi Heavy Ind Ltd | Concrete placing device and tunnel excavator equipped with the device |
CN101476469A (en) * | 2009-01-06 | 2009-07-08 | 上海隧道工程股份有限公司 | Dual-fluid synchronous slip casting and cleaning switching mechanism |
CN102661155A (en) * | 2012-05-18 | 2012-09-12 | 武汉船用机械有限责任公司 | Shield machine synchronous grouting pipeline system and shield machine with same |
CN207245722U (en) * | 2017-08-04 | 2018-04-17 | 北京市市政四建设工程有限责任公司 | A kind of built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail |
CN110242325A (en) * | 2019-06-13 | 2019-09-17 | 中铁工程装备集团盾构制造有限公司 | A kind of shield machine multiple tube two-liquid grouting device |
CN211874496U (en) * | 2020-04-03 | 2020-11-06 | 中铁工程装备集团有限公司 | Double-liquid synchronous grouting system for shield |
-
2020
- 2020-12-23 CN CN202011545222.3A patent/CN112392495A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006291636A (en) * | 2005-04-14 | 2006-10-26 | Mitsubishi Heavy Ind Ltd | Concrete placing device and tunnel excavator equipped with the device |
CN101476469A (en) * | 2009-01-06 | 2009-07-08 | 上海隧道工程股份有限公司 | Dual-fluid synchronous slip casting and cleaning switching mechanism |
CN102661155A (en) * | 2012-05-18 | 2012-09-12 | 武汉船用机械有限责任公司 | Shield machine synchronous grouting pipeline system and shield machine with same |
CN207245722U (en) * | 2017-08-04 | 2018-04-17 | 北京市市政四建设工程有限责任公司 | A kind of built-in dual-fluid synchronous slip casting pipe-line system of shield machine shield tail |
CN110242325A (en) * | 2019-06-13 | 2019-09-17 | 中铁工程装备集团盾构制造有限公司 | A kind of shield machine multiple tube two-liquid grouting device |
CN211874496U (en) * | 2020-04-03 | 2020-11-06 | 中铁工程装备集团有限公司 | Double-liquid synchronous grouting system for shield |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114392987A (en) * | 2021-12-31 | 2022-04-26 | 江苏重亚重工有限公司 | Comprehensive pipeline spraying and cleaning device for shield machine |
CN114392987B (en) * | 2021-12-31 | 2023-08-18 | 江苏重亚重工有限公司 | Comprehensive pipeline jetting and cleaning device for shield machine |
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Application publication date: 20210223 |
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