CN102966793A - Slurry balance type tube push bench and circulative slurry deslagging method - Google Patents

Slurry balance type tube push bench and circulative slurry deslagging method Download PDF

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Publication number
CN102966793A
CN102966793A CN2012104398127A CN201210439812A CN102966793A CN 102966793 A CN102966793 A CN 102966793A CN 2012104398127 A CN2012104398127 A CN 2012104398127A CN 201210439812 A CN201210439812 A CN 201210439812A CN 102966793 A CN102966793 A CN 102966793A
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China
Prior art keywords
mud
slurry
deslagging
pipeline
circulation
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CN2012104398127A
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Chinese (zh)
Inventor
钟显奇
黎东辉
邹思源
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GUANGDONG PROV FOUNDATION ENGINEERING Co
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GUANGDONG PROV FOUNDATION ENGINEERING Co
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Priority to CN2012104398127A priority Critical patent/CN102966793A/en
Publication of CN102966793A publication Critical patent/CN102966793A/en
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Abstract

The invention discloses a slurry balance type tube push bench and a circulative slurry deslagging method utilizing the same. The internal cavity of the slurry balance type tube push bench is internally provided with at least one driving system and at least one circulative deslagging system used for discharging sludge in a slurry cavity, wherein the output end of the driving system is connected with a cutter head by penetrating though a partition plate; and in the process of performing circulative slurry deslagging by virtue of the slurry balance type tube push bench, the slurry is discharged into the slurry cavity by virtue of the at least one circulative deslagging system; the soil and slurry in the slurry cavity are fully mixed to form sludge, the sludge in the slurry cavity is discharged into a slurry pool by virtue of at least one circulative deslagging system, and the discharged sludge precipitates in the slurry pool so as to form slurry. The slurry balance type tube push bench and a circulative slurry deslagging method utilizing the slurry balance type tube push bench can be used for improving the deslagging efficiency, are simple, convenient and reliable in construction, are safe and convenient in operation, and are used in the field of non-excavation engineering construction.

Description

The method of a kind of slurry-water balance type push-bench and mud circulation deslagging
Technical field
The present invention relates to the trenchless engineering construction field, particularly a kind of slurry-water balance type push-bench and use this push-bench to carry out the method for mud circulation deslagging.
Background technique
In the construction of pipeline trenchless engineering, mostly use at present jacking, the top power that namely in working pit, produces by means of push-bench, overcome the frictional force of pipeline and surrounding soil, the gradient of pipeline by design headed in the soil, and the earthwork transported, push-bench mostly is greatly slurry-water balance type and earth pressure balanced, aspect excavation cutting face earth pressure control, earth pressure balanced dregs is the walk shape, the dregs of slurry-water balance type is mud shaped, but slurry-water balance type can better be controlled surface subsidence when tunneling in the sharp sand stratum, aspect deslagging efficient, the slurry-water balance type deslagging is uninterrupted deslagging, and soil pressure formula deslagging is discontinuous, so the deslagging efficient of slurry-water balance type is high, the speed that the tunnel advances is fast.
Yet existing large-scale push-bench often is earth pressure balanced, and structural design is comparatively complicated, and deslagging efficient is low.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of simple in structure, handling safety is convenient, deslagging efficient is high slurry-water balance type push-bench.The present invention's another technical problem that will solve is that a kind of method of using this push-bench to carry out the mud circulation deslagging also will be provided in addition.
The present invention is the technological scheme that above-mentioned first technical problem of solution adopts: a kind of slurry-water balance type push-bench, comprise housing, housing comprises front case and rear case, between front case and rear case, be provided with the correction oil cylinder, be provided with the dividing plate that the inner chamber of housing is divided into muddy water chamber and machine inner chamber in the front case front portion, be provided with at least one group of drive system and at least one group of circulation dreg removing system that is used for the body refuse discharge in muddy water chamber in the machine inner chamber, the output terminal of drive system passes dividing plate and is connected with cutterhead.
In slurry-water balance type push-bench of the present invention, the circulation dreg removing system comprises plasma discharge pipeline and deslagging pipeline, plasma discharge pipeline two ends are respectively mud import and mud outlet, deslagging pipeline two ends are respectively body refuse import and sludge outlet, mud outlet and body refuse import are passed dividing plate and are stretched into the muddy water chamber, housing is provided with slurry pump and slag stock pump outward, the mud import is stretched out housing and is connected with slurry pump, sludge outlet stretches out housing and is connected with the slag stock pump, be provided with mud pit between slurry pump and slag stock pump, the circulation dreg removing system comprises that also one is arranged between plasma discharge pipeline and the deslagging pipeline mud import is communicated with the deslagging pipeline, the reversing arrangement that sludge outlet communicates with the plasma discharge pipeline.
In slurry-water balance type push-bench of the present invention, reversing arrangement comprises the first commutation pipeline that connects plasma discharge pipeline and sludge outlet and is connected the deslagging pipeline and second pipeline that commutates of mud import, be provided with the first tee ball valve at the first commutation pipeline and plasma discharge pipeline joint, be provided with the second tee ball valve at the second commutation pipeline and deslagging pipeline joint.
In slurry-water balance type push-bench of the present invention, drive system comprises drive motor, and the output terminal of drive motor passes dividing plate and is connected with bent axle, and bent axle is connected with cutterhead.
Improvement as slurry-water balance type push-bench of the present invention, the plasma discharge pipeline is provided with the first switching ball, be provided with the first connecting hose between the first switching ball and mud outlet, the deslagging pipeline is provided with the second switch ball valve, is provided with the second connecting hose between second switch ball valve and body refuse import.
Another kind as slurry-water balance type push-bench of the present invention improves, and cutterhead is the rectangle cutterhead, and the cutterhead inboard is provided with some muddy water stirring rod.
The present invention is the technological scheme that above-mentioned another technical problem of solution adopts: a kind of method of mud circulation deslagging may further comprise the steps:
1), start slurry pump, the mud in the mud pit enters to the muddy water chamber through at least one group of circulation dreg removing system by slurry pump;
2), earth enters the muddy water chamber under the shear action of cutterhead, the earth in the muddy water chamber and mud fully mix body refuse;
3), start the slag stock pump, the body refuse in the muddy water chamber is expelled to mud pit by the slag stock pump through at least one group of circulation dreg removing system;
The body refuse of 4), discharging precipitates in mud pit and forms mud;
5), the above step of circulation is to carry out the mud circulation deslagging.
In the method for mud circulation deslagging of the present invention, in the step 1), mud enters the plasma discharge pipeline through the mud import of circulation dreg removing system, enter to the muddy water chamber by the mud outlet again, in the step 3), body refuse enters the deslagging pipeline through the body refuse import of circulation dreg removing system, is being expelled to mud pit by sludge outlet.
In the method for mud circulation deslagging of the present invention, control reversing arrangement and make that the mud import communicates with the deslagging pipeline, sludge outlet communicates with the plasma discharge pipeline, in the step 1), mud enters the deslagging pipeline through the mud import of circulation dreg removing system, enter to the muddy water chamber through the body refuse import again, in the step 3), body refuse enters the plasma discharge pipeline through the mud outlet of circulation dreg removing system, is expelled to mud pit through sludge outlet again.
Beneficial effect of the present invention: by in the slurry-water balance type push-bench, being provided with at least one group of circulation dreg removing system, body refuse in the muddy water chamber can be organized interior circulation deslagging in the mode of short circle by one group of circulation dreg removing system, be that mud enters to the muddy water chamber through the circulation dreg removing system, earth in the muddy water chamber and mud fully mix body refuse, body refuse is discharged through the circulation dreg removing system, also can be by many groups circulation dreg removing system with the mode of the major cycle deslagging that circulates, being mud enters to the muddy water chamber through one group of circulation dreg removing system wherein, earth in the muddy water chamber and mud fully mix body refuse, body refuse is discharged through other one group of circulation dreg removing system, deslagging efficient is high like this, and handling safety is convenient.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and embodiments;
Fig. 1 is the longitudinal sectional view of slurry-water balance type push-bench of the present invention;
Fig. 2 is that slurry-water balance type push-bench shown in Figure 1 is along the sectional view of C-C line;
Fig. 3 is that the A of slurry-water balance type push-bench shown in Figure 1 is to view;
Fig. 4 is that the B of slurry-water balance type push-bench shown in Figure 1 is to view;
Fig. 5 is the schematic representation that the circulation dreg removing system carries out forward short circle deslagging;
Fig. 6 is the schematic representation that the circulation dreg removing system carries out reverse short circle deslagging;
Fig. 7 is the schematic representation that the circulation dreg removing system carries out the major cycle deslagging.
Embodiment
Referring to figs. 1 through Fig. 7, a kind of slurry-water balance type push-bench of the present invention, comprise housing 1, housing 1 comprises front case 11 and rear case 12, between front case 11 and rear case 12, be provided with correction oil cylinder 6, be provided with the dividing plate 111 that the inner chamber of housing 1 is divided into muddy water chamber 13 and machine inner chamber 14 in front case 11 front portions, be provided with at least one group of drive system 2 and at least one group of circulation dreg removing system 3 that is used for the body refuse discharge in muddy water chamber 13 in machine inner chamber 14, the output terminal of drive system 2 passes dividing plate 111 and is connected with cutterhead 4.
By in the slurry-water balance type push-bench, being provided with at least one group of circulation dreg removing system 3, body refuse in the muddy water chamber 13 can be organized interior circulation deslagging in the mode of short circle by one group of circulation dreg removing system 3, be that mud enters to muddy water chamber 13 through circulation dreg removing system 3, earth in the muddy water chamber 13 and mud fully mix body refuse, body refuse is discharged through circulation dreg removing system 3, also can be by many groups circulation dreg removing system 3 with the mode of the major cycle deslagging that circulates, being mud enters to muddy water chamber 13 through one group of circulation dreg removing system 3 wherein, earth in the muddy water chamber 13 and mud fully mix body refuse, body refuse is discharged through other one group of circulation dreg removing system 3, deslagging efficient is high like this, and handling safety is convenient.
Circulation dreg removing system 3 comprises plasma discharge pipeline 31 and deslagging pipeline 32, plasma discharge pipeline 31 two ends are respectively mud import 311 and mud outlet 312, deslagging pipeline 32 two ends are respectively body refuse import 321 and sludge outlet 322, mud outlet 312 and body refuse import 322 are passed dividing plate 111 and are stretched into muddy water chamber 13, housing 1 outer slurry pump 51 and the slag stock pump 52 of being provided with, mud import 311 is stretched out housing 1 and is connected with slurry pump 51, sludge outlet 322 stretches out housing 1 and is connected with slag stock pump 52,52 of slurry pump 51 and slag stock pumps are provided with mud pit 53, and circulation dreg removing system 3 comprises that also one is arranged between plasma discharge pipeline 31 and the deslagging pipeline 32 mud import 311 is communicated with deslagging pipeline 32, the reversing arrangement 33 that sludge outlet 322 communicates with plasma discharge pipeline 31.
The mode of forward short circle that can adopt circulation dreg removing system 3 deslagging that circulates, be that mud in the mud pit 53 is under the drive of slurry pump 51, enter plasma discharge pipeline 31 through mud import 311, enter to muddy water chamber 13 through mud outlet 312 again, mud in the muddy water chamber 13 and earth fully mix body refuse, and body refuse enters deslagging pipeline 32 through body refuse import 321 under the drive of slag stock pump 52, be expelled to mud pit 53 through sludge outlet 322 again, body refuse precipitates in mud pit 53 and forms mud; Controlling reversing arrangement 33 makes mud import 311 communicate with deslagging pipeline 32, sludge outlet 322 communicates with plasma discharge pipeline 31, the mode of reverse short circle that can also adopt circulation dreg removing system 3 deslagging that circulates, be that mud in the mud pit 53 is under the drive of slurry pump 51, enter deslagging pipeline 32 through mud import 311, enter to muddy water chamber 13 through body refuse import 321 again, mud in the muddy water chamber 13 and earth fully mix body refuse, body refuse is under the drive of slag stock pump 52, enter plasma discharge pipeline 31 through mud outlet 312, be expelled to mud pit 53 through sludge outlet 322 again, body refuse precipitates in mud pit 53 and forms mud.
Certainly, can also utilize many group circulation dreg removing systems 3 with the mode of forward major cycle or the oppositely major cycle deslagging that circulates, being mud enters to muddy water chamber 13 through one group of circulation dreg removing system 3 wherein, mud in the muddy water chamber 13 and earth fully mix body refuse, body refuse is expelled to mud pit 53 through other one group of circulation dreg removing system 3 again, and body refuse precipitates in mud pit 53 and forms mud.
Because forward short circle mode and the reverse short circle mode of single group circulation dreg removing system 3 can be changed mutually by reversing arrangement 33, and forward major cycle mode and the reverse major cycle mode of organizing circulation dreg removing system 3 also can be changed mutually, can obviously reduce like this accumulation of body refuse in the muddy water chamber, the efficient and the operation that further improve the circulation deslagging are convenient.
Reversing arrangement 33 comprises the first commutation pipeline 331 that connects plasma discharge pipeline 31 and sludge outlet 322, and the second commutation pipeline 332 that connects deslagging pipeline 32 and mud import 311, be provided with the first tee ball valve 333 at the first commutation pipeline 331 with plasma discharge pipeline 31 joints, be provided with the second tee ball valve 334 at the second commutation pipeline 332 with deslagging pipeline 32 joints.
By controlling the first tee ball valve 333 and the second tee ball valve 334, so that mud import 311 is communicated with deslagging pipeline 32, sludge outlet 322 is communicated with plasma discharge pipeline 31, push-bench just can recycled back the mode deslagging that circulates, controlling of the first tee ball valve 333 and the second tee ball valve 334 can be adopted hydraulic pressure, pneumatic oil cylinder or other electric tools.
Drive system 2 comprises drive motor 21, and the output terminal of drive motor 21 passes dividing plate 111 and is connected with bent axle 22, and bent axle 22 is connected with cutterhead 4.
Under the drive by drive motor 21 and bent axle 22, cutterhead 4 swings in the muddy water chamber and cuts soil layer, and earth and mud that the swing of cutterhead 4 also can make cutting fall fully mix body refuse.
A kind of improvement as slurry-water balance type push-bench of the present invention, plasma discharge pipeline 31 is provided with the first switching ball 313, between the first switching ball 313 and mud outlet 312, be provided with the first connecting hose 314, deslagging pipeline 32 is provided with second switch ball valve 323, is provided with the second connecting hose 324 between second switch ball valve 323 and body refuse import 321.
By being provided with the first connecting hose 314 and the second connecting hose 324, can avoid push-bench in the process of construction, because rocking between front case 11 and the rear case 12 causes the damage to plasma discharge pipeline 31 in the circulation dreg removing system 3 and deslagging pipeline 32.
Another kind as slurry-water balance type push-bench of the present invention improves, and cutterhead 4 is the rectangle cutterhead, and cutterhead 4 inboards are provided with some muddy water stirring rod 41.
By being provided with muddy water stirring rod 41, can make the earth in the muddy water chamber 13 mix more abundant with mud.
A kind of method that adopts the slurry-water balance type push-bench to carry out the mud circulation deslagging of the present invention may further comprise the steps:
1), start slurry pump 51, the mud in the mud pit 53 enters to muddy water chamber 13 through at least one group of circulation dreg removing system 3 by slurry pump 51;
2), earth enters muddy water chamber 13 under the shear action of cutterhead 4, the earth in the muddy water chamber 13 and mud fully mix body refuse;
3), start slag stock pump 52, the body refuse in the muddy water chamber 13 is expelled to mud pit 53 by slag stock pump 52 through at least one group of circulation dreg removing system 3;
The body refuse of 4), discharging precipitates in mud pit 53 and forms mud;
5), the above step of circulation is to carry out the mud circulation deslagging.
In step 1) and step 3), by being provided with at least one group of circulation dreg removing system 3, both can adopt single group circulation dreg removing system 3 to carry out forward short circle or the reverse short circle deslagging that circulates, also can adopt many group circulation dreg removing systems 3 to carry out forward major cycle or the reverse major cycle deslagging that circulates, and because forward circulation mode and the recycled back mode of circulation dreg removing system 3 can be changed mutually, major cycle mode and short circle mode can be changed mutually, can obviously reduce like this accumulation of body refuse in the muddy water chamber, the efficient and the operation that further improve the circulation deslagging are convenient.
In the method for mud circulation deslagging of the present invention, in the step 1), mud enters plasma discharge pipeline 31 through the mud import 311 of circulation dreg removing system 3, enter to muddy water chamber 13 by mud outlet 312 again, in the step 3), body refuse enters deslagging pipeline 32 through the body refuse import 321 of circulation dreg removing system 3, is being expelled to mud pit 53 by sludge outlet 322.
In the method for mud circulation deslagging of the present invention, control reversing arrangement 33 and make that mud import 311 communicates with deslagging pipeline 32, sludge outlet 322 communicates with plasma discharge pipeline 31, in the step 1), mud enters deslagging pipeline 32 through the mud import 311 of circulation dreg removing system 3, enter to muddy water chamber 13 through body refuse import 321 again, in the step 3), body refuse enters plasma discharge pipeline 31 through the mud outlet 312 of circulation dreg removing system 3, is expelled to mud pit 53 through sludge outlet 322 again.
Certainly, the invention is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of spirit of the present invention, the modification that these are equal to or replacement all are included in the application's claim limited range.

Claims (9)

1. slurry-water balance type push-bench, comprise housing (1), described housing (1) comprises front case (11) and rear case (12), between described front case (11) and rear case (12), be provided with correction oil cylinder (6), be provided with the dividing plate (111) that the inner chamber of described housing (1) is divided into muddy water chamber (13) and machine inner chamber (14) in described front case (11) front portion, it is characterized in that: be provided with at least one group of drive system (2) and at least one group of circulation dreg removing system (3) that is used for the body refuse discharge of muddy water chamber (13) in described machine inner chamber (14), the output terminal of described drive system (2) passes dividing plate (111) and is connected with cutterhead (4).
2. slurry-water balance type push-bench according to claim 1, it is characterized in that: described circulation dreg removing system (3) comprises plasma discharge pipeline (31) and deslagging pipeline (32), described plasma discharge pipeline (31) two ends are respectively mud import (311) and mud outlet (312), described deslagging pipeline (32) two ends are respectively body refuse import (321) and sludge outlet (322), described mud outlet (312) and body refuse import (322) are passed dividing plate (111) and are stretched into muddy water chamber (13), outer slurry pump (51) and the slag stock pump (52) of being provided with of described housing (1), described mud import (311) is stretched out housing (1) and is connected with slurry pump (51), described sludge outlet (322) stretches out housing (1) and is connected with slag stock pump (52), be provided with mud pit (53) between described slurry pump (51) and the slag stock pump (52), described circulation dreg removing system (3) comprises that also one is arranged between described plasma discharge pipeline (31) and the deslagging pipeline (32) mud import (311) is communicated with deslagging pipeline (32), the reversing arrangement (33) that sludge outlet (322) communicates with plasma discharge pipeline (31).
3. slurry-water balance type push-bench according to claim 2, it is characterized in that: described reversing arrangement (33) comprises the first commutation pipeline (331) that connects plasma discharge pipeline (31) and sludge outlet (322) and is connected deslagging pipeline (32) and second pipeline (332) that commutates of mud import (311), be provided with the first tee ball valve (333) at described the first commutation pipeline (331) with plasma discharge pipeline (31) joint, be provided with the second tee ball valve (334) at described the second commutation pipeline (332) with deslagging pipeline (32) joint.
4. each described slurry-water balance type push-bench in 3 according to claim 1, it is characterized in that: described drive system (2) comprises drive motor (21), the output terminal of described drive motor (21) passes dividing plate (111) and is connected with bent axle (22), and described bent axle (22) is connected with described cutterhead (4).
5. it is characterized in that according to claim 2 or 3 described slurry-water balance type push-bench; Described plasma discharge pipeline (31) is provided with the first switching ball (313), between described the first switching ball (313) and mud outlet (312), be provided with the first connecting hose (314), described deslagging pipeline (32) is provided with second switch ball valve (323), is provided with the second connecting hose (324) between described second switch ball valve (323) and body refuse import (321).
6. each described slurry-water balance type push-bench in 3 according to claim 1, it is characterized in that: described cutterhead (4) is the rectangle cutterhead, and described cutterhead (4) inboard is provided with some muddy water stirring rod (41).
7. a method that adopts slurry-water balance type push-bench claimed in claim 3 to carry out the mud circulation deslagging is characterized in that, may further comprise the steps:
1), start described slurry pump (51), the mud in the described mud pit (53) enters to muddy water chamber (13) through at least one group of circulation dreg removing system (3) by slurry pump (51);
2), earth enters muddy water chamber (13) under the shear action of described cutterhead (4), earth and mud in the described muddy water chamber (13) fully mix body refuse;
3), start described slag stock pump (52), the body refuse in the described muddy water chamber (13) is expelled to mud pit (53) by slag stock pump (52) through at least one group of circulation dreg removing system (3);
The body refuse of 4), discharging precipitates in described mud pit (53) and forms mud;
5), the above step of circulation is to carry out the mud circulation deslagging.
8. the method for mud circulation deslagging according to claim 7, it is characterized in that: in the described step 1), mud enters plasma discharge pipeline (31) through the mud import (311) of described circulation dreg removing system (3), enter to muddy water chamber (13) by described mud outlet (312) again, in the described step 3), body refuse enters deslagging pipeline (32) through the body refuse import (321) of described circulation dreg removing system (3), is being expelled to mud pit (53) by described sludge outlet (322).
9. the method for mud circulation deslagging according to claim 7, it is characterized in that: control described reversing arrangement (33) mud import (311) is communicated with deslagging pipeline (32), sludge outlet (322) communicates with plasma discharge pipeline (31), in the described step 1), mud enters deslagging pipeline (32) through the mud import (311) of described circulation dreg removing system (3), enter to muddy water chamber (13) through described body refuse import (321) again, in the described step 3), body refuse enters plasma discharge pipeline (31) through the mud outlet (312) of described circulation dreg removing system (3), is expelled to mud pit (53) through described sludge outlet (322) again.
CN2012104398127A 2012-11-06 2012-11-06 Slurry balance type tube push bench and circulative slurry deslagging method Pending CN102966793A (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN103398214A (en) * 2013-08-13 2013-11-20 上海力行工程技术发展有限公司 Muddy water balance push bench
CN103644369A (en) * 2013-12-24 2014-03-19 中铁上海工程局有限公司 Automatic pressure feeding device and method for lubricating and drag-reduction slurry for push pipes
CN104712339A (en) * 2015-01-07 2015-06-17 同济大学 Annular pipe jacking machine
CN108517910A (en) * 2018-03-22 2018-09-11 成都中机盈科科技有限公司 Dregs transfer device and method in pipe after the municipal and environment-friendly construction artificial push pipe in underground
CN109026053A (en) * 2018-08-16 2018-12-18 安徽卓科智能装备有限公司 A kind of mud and water balance system on push-bench
CN109372532A (en) * 2018-12-25 2019-02-22 中建四局第六建筑工程有限公司 Jacking construction engineering method under multiplexed address environment
CN110778327A (en) * 2019-10-31 2020-02-11 长兴国晨工程机械科技有限公司 Slurry pipeline maintenance device of slurry balance push bench

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103398214A (en) * 2013-08-13 2013-11-20 上海力行工程技术发展有限公司 Muddy water balance push bench
CN103398214B (en) * 2013-08-13 2018-08-28 上海力行工程技术发展有限公司 A kind of mud water balance push bench
CN103644369A (en) * 2013-12-24 2014-03-19 中铁上海工程局有限公司 Automatic pressure feeding device and method for lubricating and drag-reduction slurry for push pipes
CN103644369B (en) * 2013-12-24 2015-11-18 中铁上海工程局集团有限公司 A kind of push pipe lubrication drag reduction mud automatic pressure casting device and method
CN104712339A (en) * 2015-01-07 2015-06-17 同济大学 Annular pipe jacking machine
CN108517910A (en) * 2018-03-22 2018-09-11 成都中机盈科科技有限公司 Dregs transfer device and method in pipe after the municipal and environment-friendly construction artificial push pipe in underground
CN108517910B (en) * 2018-03-22 2019-04-26 重庆伯颜建筑工程有限公司 Dregs transfer device and method in pipe after the municipal and environment-friendly construction artificial push pipe in underground
CN109026053A (en) * 2018-08-16 2018-12-18 安徽卓科智能装备有限公司 A kind of mud and water balance system on push-bench
CN109372532A (en) * 2018-12-25 2019-02-22 中建四局第六建筑工程有限公司 Jacking construction engineering method under multiplexed address environment
CN110778327A (en) * 2019-10-31 2020-02-11 长兴国晨工程机械科技有限公司 Slurry pipeline maintenance device of slurry balance push bench

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Application publication date: 20130313