CN110242326A - The grouting device of tunnel mud - Google Patents
The grouting device of tunnel mud Download PDFInfo
- Publication number
- CN110242326A CN110242326A CN201910522625.7A CN201910522625A CN110242326A CN 110242326 A CN110242326 A CN 110242326A CN 201910522625 A CN201910522625 A CN 201910522625A CN 110242326 A CN110242326 A CN 110242326A
- Authority
- CN
- China
- Prior art keywords
- agitator tank
- tank
- pulp injection
- shaft
- bottom end
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 238000003756 stirring Methods 0.000 claims abstract description 23
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of grouting device of tunnel mud, including agitator tank, pulp injection tank and pushing component, multiple stirring rods and two roller bearings are equipped in agitator tank, roller bearing is equipped with protrusion；Pulp injection tank is located at below the agitator tank and is connected to by bellows with agitator tank；Pushing component pushes pulp injection tank sidewall slope to realize slip casting.Agitator tank in the present invention realizes being used in combination for a variety of agitating modes during stirring, improves the mixing effect of slip casting mud.The present invention also utilizes pushing component and pulp injection tank to cooperate, and realizes the control to slip casting rate during slip casting, also avoids during slip casting slip casting mud the case where pulp injection tank discharge port blocks.
Description
Technical field
The present invention relates to grouting device field, the grouting device of specifically a kind of tunnel mud.
Background technique
Currently, being all to be filled using slip casting for the fields such as railway and vcehicular tunnel, fiery colliery, shaft building and underground waterproof
It sets to be implemented, not only greatly accelerates the process of engineering, also improve the construction quality of engineering, in homogenate and slip casting
In the process, huge on construction quality influence for the mixing evenness of the mud of slip casting, the rate of slip casting also has slip casting effect
Great influence, it is good that therefore, it is necessary to a kind of mixing effects, the high-efficient grouting equipment of slip casting.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide the grouting devices of tunnel mud.The mistake of agitator tank in the present invention in stirring
Being used in combination for a variety of agitating modes is realized in journey, improves the mixing effect of slip casting mud.The present invention also utilize pushing component and
Pulp injection tank cooperates, and realizes the control to slip casting rate during slip casting, also avoids slip casting mud during slip casting and exist
The case where pulp injection tank discharge port blocks.
In order to realize these purposes and other advantages according to the present invention, the grouting device of tunnel mud is provided, comprising:
Pedestal is equipped with strut vertically thereon, and the strut includes casing and motion bar, the bottom end of described sleeve pipe and the bottom
The upper surface of seat is affixed, rotary table is coaxially disposed in described sleeve pipe, the end face of the rotary table opens up blind hole, one end of the motion bar
It is protruded into described sleeve pipe by the top of described sleeve pipe and is contacted with the rotary table, between the motion bar and the bottom end of the blind hole
Stretchable cable wire is set；
Agitator tank is mounted on the base by mounting rack, and the agitator tank is by being located above and being vertically arranged
Hollow cylinder and underlying up big and down small hollow round table integrally form, top closure, the open bottom end of the agitator tank,
The side wall of the agitator tank opens up feed inlet, is equipped with web plate, shaft, planetary gear, two roller bearings, the net in the agitator tank
Plate horizontal card is set to the junction of the hollow cylinder and hollow round table, and the shaft is vertically arranged, and the upper end Qi Ding is perpendicular to stretch out institute
It states agitator tank and connects the output shaft of a motor, bottom end and rotatably connect with the web plate by first bearing, described turn
The middle part and lower part of axis are equipped with the stirring rod of multiple levels, and the planetary gear is located above multiple stirring rods, the planet tooth
Wheel includes sun gear, two first gears engaged simultaneously with sun gear, the gear ring engaged simultaneously with two first gears,
The inner wall of the gear ring and the agitator tank is affixed, and the sun gear is set in the top of the shaft, two first gears
Axis be fixed on the top of the shaft, two roller bearings are vertically arranged and are centrosymmetric distribution about the shaft, one
The top of roller bearing is linked with the inner ring that the axis of a first gear is coaxially connected, bottom end connect second bearing, the second bearing
The bottom end of outer ring connect Contraband shape strut, be arranged idler wheel on the Contraband shape strut, the upper surface of the idler wheel and the web plate connects
The side wall of touching, the roller bearing is equipped with multiple semicircular protrusions；
Pulp injection tank is mounted on the base by the strut, and the pulp injection tank is located at below the agitator tank simultaneously
It is connected to by bellows with the discharge port of the bottom end of the agitator tank, the bottom end side of the pulp injection tank is equipped with a pair first and connects
Block, the other side and the motion bar are affixed, and the side wall of the pulp injection tank is equipped with discharge port；
Pushing component comprising fixed link, the second link block, the fixed link is vertically arranged on the base, described
Horizontal in fixed link to be equipped with push rod, the push rod is slidably connected through the fixed link and with the fixed link, the push rod
One end is contacted with the side wall of the pulp injection tank, and the push rod is equipped with the tooth band being arranged upward, and the fixed link is equipped with worm screw,
The worm screw engages with the tooth band on the push rod, and one end of the worm screw rotatably connects the fixation by 3rd bearing
Bar, the other end are coaxially arranged turntable, and the turntable is equipped with handle, and second link block is vertically arranged on the base,
Second link block is rotatably connect with a pair of first link block by bolt.
Preferably, the mounting rack includes that a pair of of upright bar, support ring and a pair of of auxiliary rod, the upright bar are vertically arranged in
On the pedestal, the top of a pair of of upright bar passes through the opposite side that connecting rod connects the support ring respectively, and the support ring level is set
Set and be set in the junction of the hollow cylinder and hollow round table, the both ends of the auxiliary rod respectively with the side wall of agitator tank,
The top of the upright bar is affixed.
Preferably, the mesh aperture on the web plate is 1.5cm.
Preferably, rubber antiskid set is arranged outside the handle.
Preferably, the push rod is equipped with top plate far from one end of the pulp injection tank.
Preferably, the stirring rate of the shaft is 300r/min.
The present invention is include at least the following beneficial effects:
The first, planetary gear is set in agitator tank, and motor also drives while the rotation of stirring rod on driving shaft
Rotation and the revolution around shaft occur for roller bearing, are additionally provided with multiple protrusions in shaft, to the stirring extent of slip casting mud by larger
Raising.
The second, after mud enters pulp injection tank, pulp injection tank is tilted using pushing component, agitator tank can be not being influenced
The discharge velocity of the control of gradient mud of pulp injection tank is utilized in the case where normal use, it is often more important that avoid mud and infusing
Starch the stopping state in tank.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the one of technical solution of the present invention；
Fig. 2 is the structural schematic diagram of mounting rack described in the one of technical solution of the present invention；
Fig. 3 is planetary gear structural schematic diagram described in the one of technical solution of the present invention；
Fig. 4 is the structural schematic diagram of strut described in the one of technical solution of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples, to enable those skilled in the art's reference
Specification word can be implemented accordingly.
As shown in figures 1-4, the grouting device of tunnel mud, comprising:
Pedestal 1, thereon vertically be equipped with strut 11, strut 11 include casing 111 and motion bar 112, the bottom end of casing 111 with
The upper surface of pedestal 1 is affixed, and rotary table 113 is coaxially disposed in casing 111, and the end face of rotary table 113 opens up blind hole, motion bar 112
One end is protruded into casing 111 by the top of casing 111 and is contacted with rotary table 113, is arranged between motion bar 112 and the bottom end of blind hole
Stretchable cable wire 114；
Agitator tank 2 is mounted on pedestal 1 by mounting rack 21, and agitator tank 2 is hollow by what is be located above and be vertically arranged
Cylinder and underlying up big and down small hollow round table integrally form, top closure, the open bottom end of agitator tank 2, agitator tank 2
Side wall open up feed inlet 22, web plate 23,25, two shaft 24, planetary gear roller bearings 26,23 water of web plate are equipped in agitator tank 2
The flat junction for being arranged in hollow cylinder and hollow round table, shaft 24 are vertically arranged, and the upper end Qi Ding is perpendicular to be stretched out agitator tank 2 and connect
Output shaft, bottom end and the web plate 23 of one motor 27 are rotatably connected by first bearing, and the middle part and lower part of shaft 24 are set
There is the stirring rod 241 of multiple levels, planetary gear 25 is located at multiple 241 tops of stirring rod, and planetary gear 25 includes sun gear
251, two first gears 252 engaged simultaneously with sun gear 251, the gear ring engaged simultaneously with two first gears 252
253, gear ring 253 and the inner wall of agitator tank 2 are affixed, and sun gear 251 is set in the top of shaft 24, two first gears 252
Axis be fixed on the top of shaft 24, two roller bearings 26 are vertically arranged and are centrosymmetric distribution about shaft 24, a rolling
The top of axis 26 is linked with the inner ring that the axis of a first gear 252 is coaxially connected, bottom end connect second bearing, second bearing
The bottom end of outer ring connects Contraband shape strut 261, is arranged idler wheel 262 on Contraband shape strut 261, idler wheel 262 and the upper surface of web plate 23 connect
The side wall of touching, roller bearing 26 is equipped with multiple semicircular raised 263；
Pulp injection tank 3 is mounted on pedestal 1 by strut 11, and pulp injection tank 3 is located at 2 lower section of agitator tank and by bellows 4
It is connected to the discharge port of the bottom end of agitator tank 2, the bottom end side of pulp injection tank 3 is equipped with a pair of first link block 31, the other side and work
Lever 112 is affixed, and the side wall of pulp injection tank 3 is equipped with discharge port 32；
Pushing component 5 comprising fixed link 51, the second link block 52, fixed link 51 are vertically arranged on pedestal 1, fixed
Horizontal on bar 51 to be equipped with push rod 511, push rod 511 is slidably connected through fixed link 51 and with fixed link 51, one end of push rod 511 with
The side wall of pulp injection tank 3 contacts, and push rod 511 is equipped with the tooth band being arranged upward, and fixed link 51 is equipped with worm screw 512 and push rod 511
On the engagement of tooth band, one end of worm screw 512 is by the way that 3rd bearing is rotatably connected and fixed bar 51, the other end is coaxially arranged turntable
513, turntable 513 is equipped with handle 514, and the second link block 52 is vertically arranged on pedestal 1, the second link block 52 and a pair first
Link block 31 is rotatably connected by bolt 521.
Pedestal 1 is equipped with strut 11, the second link block 52, fixed link 51 and mounting rack 21.Strut 11 and the second link block
52 are oppositely arranged, and the balance connected by different modes from the bottom end of pulp injection tank 3 simultaneously to keep pulp injection tank 3, wherein branch
Bar 11 includes vertical casing 111 and the motion bar 112 for being inserted from above into casing 111, and casing is interior to be arranged a rotary table 113, circle
It is opened up on platform with blind hole, motion bar 112 is connect with the bottom end of blind hole by cable wire 114, and cable wire 114 is deposited in blind when not tightening
In hole.Run through simultaneously in the first link block of a pair 32 of second link block 52 insertion, 3 bottom of pulp injection tank and by bolt 521, it is fixed
Pulp injection tank is allowed to rotate while pulp injection tank 3 and pedestal 1 relative position.
In use, mud enters in agitator tank 2 from feed inlet 22,27 output shaft of motor rotates and drives shaft 24 at this time
It rotates, therefore the multiple stirring rods being arranged in shaft start to be stirred the mud entered in agitator tank 2, the rotation of shaft 24
Rotate the sun gear 251 being set in shaft 24, the rotation of sun gear 251 also drives two first gears 253 certainly simultaneously
Turn and surround the revolution of sun gear 251 to be that roller bearing 26 starts rotation and revolution motion, completes entirely to stir with stirring rod cooperation
Process is mixed, the mud after stirring leaks down from web plate 23, enters in pulp injection tank 3 by bellows 4, when starting slip casting, shakes
Turntable 513 rotates after the dynamic handle 514 being arranged in fixed link 51, worm screw 512 due to being rotatably connected in fixed link 51,
It rotates and push rod 511 is driven to be subjected to displacement, one end of push rod 511 just pushes 3 run-off the straight of pulp injection tank, and bellows 4 is drawn
It stretches but is not blocked, rotate between the second link block 52 and a pair of first link block 32, it is movable after 3 run-off the straight of pulp injection tank
Bar 112 is pulled out in casing by pulp injection tank 3, and cable wire 114 is stretched.Mud in pulp injection tank 3 by discharge port flow out pulp injection tank 3 and with
Grouting behind shaft or drift lining.
In the present invention, planetary gear is set in agitator tank, and motor is while the rotation of stirring rod on driving shaft
Also it drives roller bearing that rotation and the revolution around shaft occurs, multiple protrusions is additionally provided in shaft, to the stirring extent of slip casting mud
By biggish raising.After mud enters pulp injection tank, pulp injection tank is tilted using pushing component, agitator tank can not influenced
Using the discharge velocity of the control of gradient mud of pulp injection tank in the case where normal use, since pulp injection tank is integral inclined, so
Mud is avoided to a certain extent in slip casting is rolled the case where blocking, and worm geared principle is utilized in pushing component, is using
There are also self-locking effects in the process, can effectively prevent operation error occur and there is a situation where pulp injection tanks to fall off.
In another technical solution, mounting rack 21 includes a pair of of upright bar 212, support ring 213 and a pair of of auxiliary rod 214, is stood
Bar 212 is vertically arranged on pedestal 1, and the top of a pair of of upright bar 212 passes through the opposite side that connecting rod 215 connects support ring 213 respectively,
Support ring 213 is horizontally disposed and is set in the junction of the hollow cylinder and hollow round table, the both ends difference of auxiliary rod 214
It is affixed with the side wall of agitator tank 2, the top of upright bar 212.The two sides of fixed link are arranged in mounting rack in the present invention, do not influence it is whole
It can guarantee that the agitator tank being located above pulp injection tank steady, safety can continue to stir while the use of a pulp injection tank.
In another technical solution, the mesh aperture on 23 web plates is 1.5cm.The aperture setting of mesh can be according to slip casting
The different purposes of mud are adjusted with requiring, this is the preferred embodiment in the technical program.
In another technical solution, rubber antiskid set is arranged outside handle 514.When the design can increase shake handle 514
The frictional force of handle avoids the slippage of handle 514 from causing danger, improves safety when invention is implemented.
In another technical solution, push rod 511 is equipped with top plate 515 far from one end of pulp injection tank 3.The design is in order to prevent
Push rod 511 is when pushing pulp injection tank 3, since misoperation causes push rod 511 that all pulp injection tank may be kept de- by fixed link
It is controlled from pushing component 51, improves the safety that invention is implemented.
In another technical solution, the stirring rate of shaft 24 is 300r/min in agitator tank 2.Agitator tank 2 in the design
Stirring rate be to be provided after comprehensively considering the stability in use that effective stirring rate is set up on mounting rack 21 with agitator tank 2
Preferred embodiment.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (6)
1. the grouting device of tunnel mud characterized by comprising
Pedestal is equipped with strut vertically thereon, and the strut includes casing and motion bar, the bottom end of described sleeve pipe and the pedestal
Upper surface is affixed, and rotary table is coaxially disposed in described sleeve pipe, and the end face of the rotary table opens up blind hole, and one end of the motion bar is by institute
The top for stating casing is protruded into described sleeve pipe and is contacted with the rotary table, is arranged between the motion bar and the bottom end of the blind hole
Stretchable cable wire；
Agitator tank is mounted on the base by mounting rack, and the agitator tank is hollow by what is be located above and be vertically arranged
Cylinder and underlying up big and down small hollow round table integrally form, and top closure, the open bottom end of the agitator tank are described
The side wall of agitator tank opens up feed inlet, is equipped with web plate, shaft, planetary gear, two roller bearings, the web plate water in the agitator tank
The flat junction for being arranged in the hollow cylinder and hollow round table, the shaft are vertically arranged, and are stirred described in the perpendicular stretching in the upper end Qi Ding
It mixes tank and connects the output shaft of a motor, bottom end and rotatably connect with the web plate by first bearing, the shaft
Middle part and lower part are equipped with the stirring rod of multiple levels, and the planetary gear is located above multiple stirring rods, the planetary gear packet
Sun gear, two first gears engaged simultaneously with sun gear, the gear ring engaged simultaneously with two first gears are included, it is described
The inner wall of gear ring and the agitator tank is affixed, and the sun gear is set in the top of the shaft, the axis of two first gears
It is fixed on the top of the shaft, two roller bearings are vertically arranged and are centrosymmetric distribution about the shaft, a roller bearing
Top link with the axis of a first gear is coaxially connected, bottom end connect second bearing inner ring, the second bearing it is outer
The bottom end of circle connects Contraband shape strut, is arranged idler wheel on the Contraband shape strut, the idler wheel is contacted with the upper surface of the web plate, institute
The side wall for stating roller bearing is equipped with multiple semicircular protrusions；
Pulp injection tank is mounted on the base by the strut, and the pulp injection tank is located at below the agitator tank and passes through
Bellows is connected to the discharge port of the bottom end of the agitator tank, the bottom end side of the pulp injection tank be equipped with a pair of first link block,
The other side and the motion bar are affixed, and the side wall of the pulp injection tank is equipped with discharge port；
Pushing component comprising fixed link, the second link block, the fixed link are vertically arranged on the base, the fixation
Horizontal on bar to be equipped with push rod, the push rod is slidably connected through the fixed link and with the fixed link, one end of the push rod
It is contacted with the side wall of the pulp injection tank, the push rod is equipped with the tooth band being arranged upward, and the fixed link is equipped with worm screw, described
Worm screw engages with the tooth band on the push rod, one end of the worm screw by 3rd bearing rotatably connect the fixed link,
The other end is coaxially arranged turntable, and the turntable is equipped with handle, and second link block is vertically arranged on the base, described
Second link block is rotatably connect with a pair of first link block by bolt.
2. the grouting device of tunnel mud as described in claim 1, which is characterized in that the mounting rack include a pair of of upright bar,
Support ring and a pair of of auxiliary rod, the upright bar are vertically arranged on the base, and the top of a pair of of upright bar passes through connecting rod respectively
The opposite side of the support ring is connected, the support ring is horizontally disposed and is set in the combination of the hollow cylinder and hollow round table
Place, the both ends of the auxiliary rod are affixed with the top of the side wall of agitator tank, the upright bar respectively.
3. the grouting device of tunnel mud as described in claim 1, which is characterized in that the mesh aperture on the web plate is
1.5cm。
4. the grouting device of tunnel mud as described in claim 1, which is characterized in that be arranged rubber antiskid outside the handle
Set.
5. the grouting device of tunnel mud as described in claim 1, which is characterized in that the push rod is far from the pulp injection tank
One end is equipped with top plate.
6. the grouting device of tunnel mud as described in claim 1, which is characterized in that the stirring rate of the shaft is
300r/min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522625.7A CN110242326B (en) | 2019-06-17 | 2019-06-17 | Grouting device for tunnel slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522625.7A CN110242326B (en) | 2019-06-17 | 2019-06-17 | Grouting device for tunnel slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110242326A true CN110242326A (en) | 2019-09-17 |
| CN110242326B CN110242326B (en) | 2020-07-28 |
Family
ID=67887598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910522625.7A Active CN110242326B (en) | 2019-06-17 | 2019-06-17 | Grouting device for tunnel slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242326B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894629A (en) * | 2020-06-12 | 2020-11-06 | 武汉船用机械有限责任公司 | Shield constructs quick-witted slip casting jar and shield constructs machine |
| CN114876504A (en) * | 2022-04-30 | 2022-08-09 | 甘肃路桥建设集团有限公司 | Radial expanding type tunnel lining slip casting machine of annular offset hybrid |
| CN115721974A (en) * | 2023-01-28 | 2023-03-03 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894629A (en) * | 2020-06-12 | 2020-11-06 | 武汉船用机械有限责任公司 | Shield constructs quick-witted slip casting jar and shield constructs machine |
| CN114876504A (en) * | 2022-04-30 | 2022-08-09 | 甘肃路桥建设集团有限公司 | Radial expanding type tunnel lining slip casting machine of annular offset hybrid |
| CN115721974A (en) * | 2023-01-28 | 2023-03-03 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
| CN115721974B (en) * | 2023-01-28 | 2023-04-04 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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| Publication number | Publication date |
|---|---|
| CN110242326B (en) | 2020-07-28 |
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