CN113832976A - Double-liquid grouting device for foundation pit engineering plugging and emergency rescue and construction method - Google Patents
Double-liquid grouting device for foundation pit engineering plugging and emergency rescue and construction method Download PDFInfo
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- CN113832976A CN113832976A CN202111213245.9A CN202111213245A CN113832976A CN 113832976 A CN113832976 A CN 113832976A CN 202111213245 A CN202111213245 A CN 202111213245A CN 113832976 A CN113832976 A CN 113832976A
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- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000004568 cement Substances 0.000 claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 32
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004576 sand Substances 0.000 claims description 14
- 239000011440 grout Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 11
- 238000011049 filling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a double-liquid grouting device for plugging and rescuing in foundation pit engineering, which comprises an inner pipe, an outer pipe, a first slurry pump and a second slurry pump, wherein the inner pipe is sleeved on the outer pipe, the inner pipe is connected with the first slurry pump, the outer pipe is connected with the second slurry pump, the inner pipe and the outer pipe are both in an L shape, the upper end of the inner pipe is provided with a first pouring port, the upper end of the outer pipe is provided with a second pouring port, the lower end of the inner pipe is provided with a mixing section, the mixing section is positioned in the outer pipe, the field operation space can be saved by adopting the sleeving connection of the inner pipe and the outer pipe, the mixing section is arranged at the lower end of the inner pipe, the proportioning of cement slurry and water glass can be flexibly adjusted respectively, and therefore, the cement slurry and the water glass are fully mixed to achieve the purpose of plugging and water leakage.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering construction, in particular to a double-liquid grouting device and a construction method for foundation pit engineering leakage stoppage and emergency rescue.
Background
In building and municipal engineering, a basement is required to be built or a trench is required to be excavated, and foundation pit supporting and waterproof curtain or underground continuous wall construction are required. When the waterproof curtain is built, due to reasons of complex geology, construction operation or construction machinery faults and the like, the waterproof curtain cannot achieve the functions of stopping water and intercepting underground water due to the fact that a stirring pile or a jet grouting pile is not lapped, or a lap joint of an underground continuous wall has defects, so that water leakage or large sand gushing and water gushing occur during excavation of a foundation pit, the foundation pit cannot be excavated or the surrounding environment is influenced due to the water leakage of the foundation pit, the defects or the failure of the waterproof curtain of the foundation pit are serious quality accidents of engineering, and measures such as seepage-proofing and leakage stopping remedy or emergency rescue and the like need to be adopted in engineering design or construction under the condition.
The existing double-liquid grouting pumps in various forms on the market are used for conveying double-liquid grout by using the double-liquid grouting pump which is a grout suction cylinder body, a drilling and grouting all-in-one machine (WSS construction method) is generally used on a double-liquid grouting construction site, but the mixing section of cement and water glass double liquid of the method only has the position of a drill bit, the mixing section of the double-liquid grout is short, the mixing time is short, the grouting flow is small, the grouting pressure is small, a pipe is easy to block when a drill rod is dismounted, water is injected firstly when the drill rod is dismounted, the setting time of the cement and water glass is long, the strength of a consolidation body is small, and the problems of large sand gushing and water gushing and blocking when the water leakage of a foundation pit is particularly solved effectively and quickly.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a double-liquid grouting device for plugging and rescuing in foundation pit engineering. The proportion of the cement paste and the water glass is flexibly adjusted, so that the cement paste and the water glass are fully mixed to achieve the purpose of blocking water leakage.
The invention also aims to provide a construction method for plugging and rescuing in the foundation pit engineering. The operation is simple, the implementation is convenient, the water leakage of the foundation pit is quickly blocked, and the emergency rescue effect can be quickly achieved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a two liquid slip casting devices of foundation ditch engineering leaking stoppage speedily carrying out rescue work, includes inner tube, outer tube, first slush pump and second slush pump, the inner tube cup joints in the outer tube, the inner tube is connected with first slush pump, the outer tube is connected with the second slush pump, the inner tube all becomes the L type with the outer tube, the upper end of inner tube is equipped with first mouth of pouring, the upper end of outer tube is equipped with the second mouth of pouring, the lower extreme of inner tube is equipped with the mixed section, the mixed section is located the outer tube.
Preferably, the first filling opening is provided with a one-way reverse grout stop valve.
A construction method for plugging and emergency rescue of foundation pit engineering comprises the following steps:
s1, adopting straw and cotton-flax bags to block the water leakage position of the foundation pit;
s2, performing technical crossing on the construction technical requirements and the operation geology of the constructors;
s3, measuring and positioning the water leakage position of the foundation pit, and setting a grouting hole position;
s4, forming holes by using a geological drilling machine, enabling drill holes to penetrate through a sand layer and enter a waterproof layer for more than two meters, inserting a grouting pipe of a double-liquid grouting device into the bottom of the drilled holes, and flushing the inner wall of the grouting pipe by using water;
s5, proportioning the cement paste and the glass water, adjusting the setting time of the cement paste and the glass water when the cement paste and the glass water are combined according to the water quantity of the water leakage position, injecting the cement paste into the first pouring port, and injecting the water glass into the second pouring port;
s6, intermittently grouting the water leakage position of the hole bottom, alternately grouting single-liquid cement paste and double-liquid cement paste when the water leakage amount of the water leakage position is reduced, firstly adopting thin paste, then adopting thick paste, adopting double-liquid cement paste to plug the water outlet of the water leakage, and repairing a waterproof curtain by adopting a high-pressure jet grouting pile after plugging is completed.
Preferably, in S1, sand pack or soil back pressure is performed on the leaking part of the foundation pit.
Preferably, between S4 and S5, a colored water pouring test is adopted to observe a colored water leakage point and the water injection amount of colored water, and the connectivity among the bottom of the hole, the pouring pipe and the water outlet point is evaluated.
Preferably, the colored water is a mixture of water and one of red ink or potassium permanganate.
Preferably, in S5, the cement slurry is portland cement with a strength of P042.5R, and the water cement ratio of the cement slurry is 0.6-0.8: 1, the mass ratio of the cement paste to the water reducing agent is 0.5-1%; the baume degree of the water glass is 39-41, the modulus of the water glass is 3.1-3.4, and the volume ratio of the cement paste to the water glass is 1: 0.4 to 1.
Preferably, a retarder or an accelerator is added when the two-fluid slurry is alternately poured.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to a double-liquid grouting device for plugging and rescuing in foundation pit engineering, which is characterized in that an inner pipe is sleeved on an outer pipe, the inner pipe is connected with a first slurry pump, the outer pipe is connected with a second slurry pump, the inner pipe and the outer pipe are both in an L shape, a first filling port is arranged at the upper end of the inner pipe, a second filling port is arranged at the upper end of the outer pipe, a mixing section is arranged at the lower end of the inner pipe, the mixing section is positioned in the outer pipe, the field operation space can be saved by adopting the sleeving of the inner pipe and the outer pipe, the mixing section is arranged at the lower end of the inner pipe, and the proportion of cement paste and water glass can be flexibly adjusted respectively, so that the cement paste and the water glass are fully mixed to achieve the purpose of plugging and leaking water.
2. The construction method for plugging and rescuing the foundation pit engineering is simple to operate and convenient to implement, can quickly plug the leakage water of the foundation pit, can quickly achieve the rescuing effect, can randomly adjust the setting time of cement paste and water glass under double-liquid grouting, ensures that the cement paste is set at the leakage position, can play roles in filling, compacting, splitting and supporting a framework and a plate frame on a stratum, plays a role in reinforcing a foundation and prevents water and soil loss.
3. According to the construction method for plugging and rescuing in the foundation pit engineering, the slurry is quickly solidified, the solidified slurry is poured into a soil layer in a split or compaction mode, a building can be lifted under the action of pressure, the effect of correcting the deflection of the building is achieved, and the building can be prevented from re-falling during grouting construction; the early strength of the slurry solidified body is high.
Drawings
Fig. 1 is a schematic view of a double-liquid grouting device for plugging and rescuing in foundation pit engineering.
Wherein, 1 is the inner tube, 2 is the outer tube, 3 is first pouring port, 4 is the second pouring port, 5 is the mixing section, 6 is the grout outlet, 7 is first slush pump, 8 is the second slush pump, 9 is water glass, 10 is grout.
Detailed Description
The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.
The utility model provides a biliquid slip casting device that foundation ditch engineering leaking stoppage was speedily carried out rescue work, includes inner tube 1, outer tube 2, first slush pump 7 and second slush pump 8, inner tube 1 cup joints in outer tube 2, and inner tube 1 is connected with 2 screw threads of outer tube, inner tube 1 is connected with first slush pump 7, outer tube 2 is connected with second slush pump 7, inner tube 1 all becomes the L type with outer tube 2, the upper end of inner tube 1 is equipped with first infusion mouth 3, the upper end of outer tube 2 is equipped with second infusion mouth 4, the lower extreme of inner tube 1 is equipped with mixed section 5, mixed section is located outer tube 2, adopts inner tube 1 and outer tube 2 to cup joint and can save the field operation space, and the lower extreme of inner tube 1 is equipped with mixed section 5, can adjust grout 9 and water glass 10 ratio in a flexible way respectively to make grout 9 and water glass 10 intensive mixing reach the purpose of shutoff of leaking.
The first pouring port 3 is provided with a one-way reverse stop valve, when cement paste 9 and water glass 10 are condensed in a high-pressure pipe or are condensed in a first slurry pump and a second slurry pump, the blockage of the high-pressure pipe or the pump can be caused, the normal grouting construction is influenced, the pipeline is scrapped seriously, the operation inconvenience and the operation difficulty of slurry stringing and the like are caused for preventing the pressure difference of grouting, the one-way reverse stop valve is installed at the front end of the high-pressure pipe for conveying the first pouring port 3, and the condition of the operation difficulty is avoided.
A construction method for plugging and emergency rescue of foundation pit engineering comprises the following steps:
s1, plugging the water leakage position of the foundation pit by adopting straw, cotton quilt or gunny bag; the slurry solidification when the double-slurry flows out is facilitated, the situation that sandy soil outside the foundation pit is extruded and flushed when the grouting pressure is increased can be prevented, and the stability and the safety of the foundation pit are facilitated.
S2, performing technical crossing on the construction technical requirements and the operation geology of the constructors; the grouting and plugging equipment and the laying and installation work of hydropower, pipelines, cement slurry pools and the like are completed.
S3, measuring and positioning the water leakage position of the foundation pit, and setting a grouting hole position; the hole site of the double-liquid grouting can be positioned at the top of the foundation pit or the water outlet point of the side wall in the foundation pit, and the flexible positioning is required according to the water quantity and the requirement of foundation pit plugging; the foundation pit top is arranged 1-1.5 m away from the outer edge of the foundation pit and 1-1.3 m away from the outer edge of the foundation pit.
S4, adopting a geological drilling machine to form a hole, wherein the drilling machine is firmly fixed and cannot be moved randomly; adopting a geological drilling machine to form a hole, or using a 150D crawler machine to drill with a pipe, and drilling a hole by using a drilling and grouting all-in-one machine when the construction position is narrow; when collapse exists at the top of a foundation pit and the like under the condition that a drilling machine is not placed at a sufficient position, a method of striking a pipe by a manual hammer is adopted, the steel pipe is struck by the manual hammer section by section, a drilled hole penetrates through a sand layer and enters a waterproof layer for more than two meters, a grouting pipe of a double-liquid grouting device is inserted into the bottom of the drilled hole, and the inner walls of an inner pipe 1 and an outer pipe 2 are flushed by water; the washing pipe is used for washing holes so as to be beneficial to pouring the grouting slurry into the stratum, and the inner pipe 1 needs to be continuously pulled up and down when the grouting slurry is washed to the bottom, so that sand grains are prevented from clamping the inner pipe 1 in the outer pipe 2.
S5, proportioning the cement paste 9 and the glass water 10, adjusting the setting time when the cement paste 9 and the glass water 10 are combined according to the water quantity at the water leakage position, injecting the cement paste 9 into the first injection port 3, and injecting the glass water 10 into the second injection port 4; the concentration or the dosage of the water glass 10 can be adjusted according to actual needs; after the cement paste 9 and the water glass 10 are mixed, the curing time is between ten seconds and tens of seconds; when the water leakage amount is extremely large and the double-liquid slurry is leaked out of the water leakage position but is not solidified, hot water can be adopted to prepare the water glass 10 so as to accelerate the solidification of the double-liquid slurry.
S6, intermittently grouting the water leakage position at the bottom of the hole, and when the water leakage amount at the water leakage position is reduced, alternately grouting by adopting single-liquid cement paste 9 and double-liquid cement paste, firstly adopting thin paste, then adopting thick paste, adopting double-liquid cement paste to plug the water outlet at the water leakage position, wherein the water outlet corresponds to the grout outlet 6, after plugging is completed, reinforced grouting, hole sweeping grouting and the like are carried out according to the condition of sand loss, and a high-pressure jet grouting pile can be adopted to remedy a water-stop curtain; adopting an upward grouting method, gradually pulling the grouting pipe upwards at a constant speed from the bottom of the hole pipe to about 1m above the sand layer according to the slurry suction condition during grouting, and flushing the grouting inner pipe 1 with clear water after each grouting so as to continue grouting for the next time; when the leakage is blocked by large water, the double-liquid slurry is simultaneously poured, pump-stopping intermittent grouting is adopted, the setting time is adjusted by adjusting the proportion of the double-liquid slurry and the like by switching on and off a grouting head, when the water quantity is not large, the cement slurry 9 can be firstly poured, the water glass 10 is poured after the water slurry flows out of the foundation pit, or the proportion of the double-liquid slurry and the concentration of the water glass 10 are adjusted, and the quick leakage blocking is achieved; when special needs are met, the double-liquid-slurry is ultra-fast solidified by using hot water to prepare the water glass 10; the grouting amount is adjusted and controlled according to the grouting frequency, the site construction water leakage condition and the construction requirement, and the grouting pressure is 0.2-1.5 MPa; the method adopts various grouting processes such as multiple pipe washing and recirculation grouting, sequential and layered grouting, sequential hole jumping grouting, hole sweeping grouting and the like so as to achieve the purpose of plugging, filling and reinforcing, and simultaneously adopts effective grouting to reduce the lifting of the soil body on the top of the foundation pit, reduce the extrusion to the side wall of the foundation pit and ensure the safety of the foundation pit.
In S1, sand bag or soil is pressed against the water leakage position of the foundation pit to filter the sand and disperse the water leakage, so as to stop the sand and slow down the water flow and prevent the sand from losing.
And (3) observing a colored water leakage point and the water injection amount of colored water by adopting a colored water injection test between S4 and S5, evaluating the connectivity among the hole bottom, the injection pipe and a water outlet point, and observing and recording the following parameters when the colored water is injected: and (4) analyzing the water channel and the connectivity of the gushing water according to the initial filling time, the bleeding time of the leakage point and the water injection amount during bleeding.
The colored water is a mixture of water and one of red ink or potassium permanganate, so that the flow of the water and the water outlet time of a leakage point can be observed conveniently.
In S5, the cement slurry 9 is silicate cement with the strength of P042.5R, the water cement ratio of the cement slurry 9 is 0.6-0.8: 1, the mass ratio of the cement paste 9 to the water reducing agent is 0.5-1 percent; the baume degree of the water glass 10 is 39-41, the modulus of the water glass 10 is 3.1-3.4, and the volume ratio of the cement paste 9 to the water glass 10 is 1: 0.4 to 1. According to the leaking stoppage water quantity or slurry return condition, the concentration or the dosage of the water glass 10 can be adjusted according to actual needs, and the consistency and the hardening strength of the double-fluid slurry can be conveniently adjusted at any time.
And a retarder or an accelerator is added when the double-liquid slurry is alternately poured, so that the setting time of the cement slurry 9 and the water glass 10 can be further flexibly controlled.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The utility model provides a biliquid slip casting device of foundation ditch engineering leaking stoppage speedily carrying out rescue work which characterized in that, includes inner tube, outer tube, first slush pump and second slush pump, the inner tube cup joints in the outer tube, the inner tube is connected with first slush pump, the outer tube is connected with the second slush pump, the inner tube all becomes the L type with the outer tube, the upper end of inner tube is equipped with first pouring opening, the upper end of outer tube is equipped with the second and pours into the mouth, the lower extreme of inner tube is equipped with the mixed section, the mixed section is located the outer tube.
2. The dual-liquid grouting device for foundation pit engineering plugging and emergency rescue according to claim 1, wherein the first grouting port is provided with a one-way reverse grout stop valve.
3. A construction method for plugging and emergency rescue of foundation pit engineering is characterized by comprising the following steps:
s1, plugging the water leakage position of the foundation pit by adopting straw, cotton quilt or gunny bag;
s2, performing technical crossing on the construction technical requirements and the operation geology of the constructors;
s3, measuring and positioning the water leakage position of the foundation pit, and setting a grouting hole position;
s4, forming holes by using a geological drilling machine, enabling drill holes to penetrate through a sand layer and enter a waterproof layer for more than two meters, inserting a grouting pipe of a double-liquid grouting device into the bottom of the drilled holes, and flushing the inner wall of the grouting pipe by using water;
s5, proportioning the cement paste and the glass water, adjusting the setting time of the cement paste and the glass water when the cement paste and the glass water are combined according to the water quantity of the water leakage position, injecting the cement paste into the first pouring port, and injecting the water glass into the second pouring port;
s6, intermittently grouting the water leakage position of the hole bottom, alternately grouting single-liquid cement paste and double-liquid cement paste when the water leakage amount of the water leakage position is reduced, firstly adopting thin paste, then adopting thick paste, adopting double-liquid cement paste to plug the water outlet of the water leakage, and repairing a waterproof curtain by adopting a high-pressure jet grouting pile after plugging is completed.
4. The construction method for plugging and rescuing of the foundation pit engineering according to claim 3, characterized in that: and in S1, performing sand pack or soil back pressure on the water leakage position of the foundation pit.
5. The construction method for plugging and rescuing of the foundation pit engineering according to claim 3, characterized in that: and (3) observing a colored water leakage point and the water injection amount of the colored water by adopting a colored water injection test between S4 and S5, and evaluating the connectivity among the hole bottom, the injection pipe and the water outlet point.
6. The construction method for plugging and rescuing of the foundation pit engineering according to claim 5, characterized in that: the colored water is a mixture of water and one of red ink or potassium permanganate.
7. The construction method for plugging and rescuing of the foundation pit engineering according to claim 3, characterized in that: in S5, portland cement with the strength of P042.5R is adopted as cement paste, and the water-cement ratio of the cement paste is 0.6-0.8: 1, the mass ratio of the cement paste to the water reducing agent is 0.5-1%; the baume degree of the water glass is 39-41, the modulus of the water glass is 3.1-3.4, and the volume ratio of the cement paste to the water glass is 1: 0.4 to 1.
8. The construction method for plugging and rescuing of the foundation pit engineering according to claim 3, characterized in that: and adding a retarder or an accelerator when the double-liquid slurry is alternately poured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111213245.9A CN113832976A (en) | 2021-10-19 | 2021-10-19 | Double-liquid grouting device for foundation pit engineering plugging and emergency rescue and construction method |
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| CN202111213245.9A CN113832976A (en) | 2021-10-19 | 2021-10-19 | Double-liquid grouting device for foundation pit engineering plugging and emergency rescue and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116066152A (en) * | 2023-04-04 | 2023-05-05 | 华北有色工程勘察院有限公司 | Double-pipe grouting device for mine roadway |
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2021
- 2021-10-19 CN CN202111213245.9A patent/CN113832976A/en active Pending
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| CN201801805U (en) * | 2010-08-05 | 2011-04-20 | 杭州金泰建设工程有限公司 | Combined double-liquid mixing and grouting device |
| CN106761543A (en) * | 2016-12-02 | 2017-05-31 | 淮北矿业股份有限公司 | A kind of method that section is missed by goaf that drills |
| CN110469347A (en) * | 2019-09-03 | 2019-11-19 | 重庆城建控股(集团)有限责任公司 | The double slurries grouting methods of rich water tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116066152A (en) * | 2023-04-04 | 2023-05-05 | 华北有色工程勘察院有限公司 | Double-pipe grouting device for mine roadway |
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Application publication date: 20211224 |
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