CN111006952A - Experimental testing device and grouting method for high-pressure penetrating grouting to strengthen fractured rock samples - Google Patents
Experimental testing device and grouting method for high-pressure penetrating grouting to strengthen fractured rock samples Download PDFInfo
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- CN111006952A CN111006952A CN201911170967.3A CN201911170967A CN111006952A CN 111006952 A CN111006952 A CN 111006952A CN 201911170967 A CN201911170967 A CN 201911170967A CN 111006952 A CN111006952 A CN 111006952A
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- 239000011435 rock Substances 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 238000007569 slipcasting Methods 0.000 claims description 10
- 238000009715 pressure infiltration Methods 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000011440 grout Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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Abstract
本发明高压渗透注浆加固裂隙岩石试样的实验测试装置及注浆方法，该实验测试装置包括注浆装样区、注浆装置和清洗装置；注浆装置包括空气压缩机和浆液桶，高压空气带动浆液桶内的超细水泥浆液进入注浆装样区底部；高压空气经过多个阀门后进入注浆区内两侧；注浆装样区为密封结构，注浆装样区包括浆液装填区、注浆区和金属空心圆柱夹具；注浆时，将裂隙岩石试样放置于夹具中心孔处，从浆液桶流出的高压浆液从夹具下部的浆液装填区底端，以及夹具四周渗透的同时注满岩石试样；高压空气泵出清水，以清洗管道内残留的浆液至废物接收桶内。本发明通过“低位注浆，高位翻浆”观察岩石试样注浆效果，在注浆完成的同时及时清洗，避免浆液淤积，操作方便、注浆控制精确，且注浆效果好。
The experimental testing device and grouting method for strengthening fractured rock samples by high-pressure penetrating grouting of the present invention, the experimental testing device includes a grouting sample loading area, a grouting device and a cleaning device; the grouting device includes an air compressor and a slurry barrel, a high-pressure The air drives the ultra-fine cement slurry in the slurry bucket into the bottom of the grouting and sample loading area; the high-pressure air enters the two sides of the grouting area after passing through multiple valves; the grouting sample loading area is a sealed structure, and the grouting sample loading area includes the slurry filling. During grouting, the fractured rock sample is placed in the center hole of the fixture, and the high-pressure slurry flowing out of the slurry tank penetrates from the bottom of the slurry filling area at the lower part of the fixture and around the fixture while infiltrating Fill with rock samples; high-pressure air pumps out clean water to clean the residual slurry in the pipeline to the waste receiving bucket. The present invention observes the grouting effect of rock samples through "grouting at low position and grouting at high position", cleans in time when grouting is completed, avoids slurry accumulation, is convenient to operate, precise grouting control, and has good grouting effect.
Description
Technical Field
The invention relates to a high-pressure grouting reinforcement device for deep-buried underground engineering fractured surrounding rock, in particular to an experimental test device and a grouting method for reinforcing a fractured rock sample by high-pressure permeation grouting.
Background
The grouting reinforcement technology is widely applied in the excavation construction process of a deep-buried grotto, the integrity and the safety of fractured surrounding rocks are obviously improved, but the key technical problem that the bearing capacity and the permeability of the fractured surrounding rocks are difficult to test by high-pressure grouting reinforcement exists, the stability and the long-term safety of the underground engineering surrounding rocks are influenced, and the high attention and the attention of the underground engineering boundary are attracted. Therefore, a series of grouting reinforcement fractured rock mechanical property and permeability test experiments need to be carried out to detect the grouting reinforcement effect of the fractured rock.
At present, a plurality of laboratory grouting test devices are developed domestically, but the laboratory grouting test devices have more problems. For example, most grouting reinforcement experiment testing devices mainly adopt a drilling and pouring method, and the method is only suitable for samples with few cracks. In the actual simulation process, a sample with more cracks needs to be used, but the condition that the multi-crack sample is easy to generate structural damage in the drilling process is also needed, the influence of the actual high-pressure environment on grouting needs to be considered in the simulation process, the real-time grouting environment needs to be accurately monitored in the grouting process, and the sample grouting progress is determined. Therefore, a new grouting device capable of grouting a multi-fracture rock sample and monitoring the grouting environment in the grouting process needs to be developed.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides an experimental test device and a grouting method for reinforcing a fractured rock sample by high-pressure permeation grouting, and aims to overcome the defects in the prior art.
The technical scheme is as follows: the experimental test device for reinforcing the fractured rock sample by high-pressure permeation grouting comprises a grouting sample loading area, a grouting device and a cleaning device, wherein the grouting device controls the air pressure through a plurality of pressurizing valves;
the grouting device comprises an air compressor, a pressurizing pipe, a grouting pipe and a slurry barrel, and high-pressure air of the air compressor drives superfine cement slurry in the slurry barrel to enter the bottom of the grouting sample loading area through a ninth pressurizing valve and a third pressurizing valve in the grouting pipe after passing through a sixth pressurizing valve and a seventh pressurizing valve in the pressurizing pipe; high-pressure air enters two sides in the grouting area after passing through a sixth pressurizing valve, a fifth pressurizing valve, a second pressurizing valve and a first pressurizing valve in the pressurizing pipe;
the grouting sample loading area is a sealing structure and comprises a slurry filling area, a grouting area and a metal hollow cylindrical clamp; the metal hollow cylinder clamp is positioned between the slurry filling area and the grouting area, holes are formed in the bottom and the side wall of the metal hollow cylinder, the fractured rock sample is positioned at the central hole of the clamp, and the high-pressure slurry flowing out of the slurry barrel is filled with the rock sample while penetrating from the bottom end of the slurry filling area at the lower part of the clamp and the periphery of the clamp; the top of the metal hollow cylindrical clamp is provided with a sealing cover with a first barometer; the center of the sealing cover is transparent glass;
the cleaning device comprises a clear water barrel and a waste receiving barrel, wherein the clear water barrel is communicated with the air compressor, high-pressure air in the air compressor sequentially passes through the sixth pressurizing valve and the seventh pressurizing valve and then pumps clear water out of the clear water barrel, and the clear water passes through the eighth pressurizing valve and the fourth pressurizing valve to clean residual slurry in the pipeline to the waste receiving barrel.
The metal hollow cylindrical clamp consists of three 120-degree metal hollow clamp units with holes.
The front ends of the sixth pressurizing valve, the seventh pressurizing valve, the ninth pressurizing valve and the third pressurizing valve are all provided with air pressure meters.
The second pressurizing valve and the first pressurizing valve are positioned on two sides of the metal hollow cylindrical clamp.
The rear end of the second pressurizing valve is provided with a third air pressure meter, and the rear end of the first pressurizing valve is provided with a second air pressure meter.
The front end of the fourth pressurizing valve is provided with a fourth barometer.
The invention discloses a grouting method for reinforcing a fractured rock sample by high-pressure permeation grouting, which adopts an experimental testing device for reinforcing the fractured rock sample by the high-pressure permeation grouting, and comprises the following steps:
(1) placing a fractured rock sample at the central hole of the metal hollow cylindrical clamp, and covering a sealing cover;
(2) high-pressure air of an air compressor injects superfine cement slurry into the slurry filling area through a plurality of pressurizing valve slurry barrels, and after the slurry is filled, the high-pressure air permeates into the grouting area from holes on two sides of the metal hollow clamp in the grouting sample filling area through a plurality of pressurizing valves;
(3) the reading of the first air pressure gauge changes, the phenomenon of slurry turning on the upper part of the rock sample is observed from the sealing cover, and all the pressure valves are closed;
(4) opening the third pressure valve and the fourth pressure valve, and taking out the sample; and opening the sixth pressure valve, the seventh pressure valve and the eighth pressure valve, and cleaning the residual slurry in the pipeline by using clear water.
The working principle is as follows: the high-pressure permeation grouting device is suitable for accurately controlling grouting of a reinforced fractured rock sample in an experiment. This experiment testing arrangement mainly adopts and sees through porous metal anchor clamps high pressure infiltration slip casting mode to set up barometer and transparent sealing lid in the instrument and realize the monitoring to pressure and the slip casting condition. In the grouting device, a 120-degree perforated metal hollow cylindrical clamp is adopted as a clamp, and a standard fractured rock sample is positioned at a central hole of the clamp; a transparent sealing cover is arranged above the grouting instrument, and the grouting effect of the rock sample is observed through low-position grouting and high-position grout turning so as to judge the grouting completion condition.
The beneficial effects are that: the invention has the following advantages:
(1) the high-pressure grouting is carried out on the rock sample from different directions through the metal hollow cylindrical clamp with the holes, the all-dimensional grouting of the multi-fracture rock sample is realized, the further damage of the drilling grouting on the fracture rock sample is avoided, the grouting effect is ensured, the completeness of the grouting is ensured, and the rock sample with excellent effect is provided for the subsequent permeability characteristic and bearing capacity test; meanwhile, the invention is convenient to assemble and disassemble and simple and convenient to operate.
(2) The barometers are arranged in the grouting instrument and at the valve, and the barometers and the valve work cooperatively, so that the experimental device can be accurately controlled, and the grouting environment in the instrument can be monitored in real time; and the grouting problem of multi-fracture rocks is solved by a high-pressure permeation grouting principle, the grouting effect is optimized, and the efficiency and the completeness of high-pressure grouting are ensured.
(3) A transparent sealing cover is arranged above the metal injection hollow cylindrical clamp, so that the grouting condition can be observed conveniently, the grouting scheme is adjusted in time by combining with barometer data, and the visual operation of the device is realized.
(4) The grouting pipelines used by the invention are all superfine cement slurry pipelines, so that the control of air pressure is facilitated, the high-pressure grouting of the multi-fracture rock sample is completed, and more economic benefits are obtained on the premise of ensuring high pressure. Meanwhile, different grouting environment schemes are adopted, grouting products are researched, and more theoretical experiences are provided for actual grouting.
(5) The method can be used for preparing the rock sample of the multi-fracture surrounding rock and testing the grouting effect of the rock sample in different environments.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic view of a perforated metal fixture of the present invention;
FIG. 3 is a schematic view of a metal clamp of the present invention wrapping a rock sample;
FIG. 4 is a schematic view of a transparent sealing cover of the present invention;
FIG. 5 is a schematic view of the slurry loading zone of the present invention.
Detailed Description
As shown in figure 1, the invention comprises a grouting sample loading area, a grouting device and a cleaning device.
The grouting sample loading area comprises a slurry loading area 6, a grouting area 7 and a metal hollow cylindrical clamp 5, and the grouting sample loading area forms a closed system with excellent sealing property for a grouting rock sample to ensure the grouting effect. Wherein the grouting area 7 is positioned above the metal hollow cylindrical clamp 5, and the top of the metal hollow cylindrical clamp 5 is provided with a sealing cover 26. The center of the sealing cover is transparent glass 27, and an air pressure gauge 8 is arranged above the transparent glass to observe the air pressure change in the grouting area 7, so that the grouting area 7 can measure the pressure of air.
The metal hollow cylindrical clamp 5 with the holes is formed by fixing three clamp units with central angles of 120 degrees, and the side surface and the bottom of the metal hollow cylindrical clamp 5 are provided with the holes so as to facilitate the penetration of slurry. The standard fractured rock sample is located at the central hole of the clamp, so that grouting for the rock sample from different directions is facilitated, and the grouting effect for the multi-fractured rock sample is realized.
The grouting device comprises an air compressor 1, and the air compressor is connected with a grouting pipe, a cleaning pipe and a pressurizing pipe and provides air pressure for high-pressure grouting and cleaning of pipelines. The grouting device controls the size of air pressure through a grouting valve, so that the accurate control of the slurry amount is achieved.
Firstly, after passing through the sixth pressurizing valve 19 and the seventh pressurizing valve 21, the high-pressure air output by the air compressor 1 drives the superfine cement slurry in the slurry barrel 3 to pass through the ninth pressurizing valve 25 and the third pressurizing valve 13, and then enters the slurry filling area 6 from the bottom of the grouting sample filling area.
The pressure tube that air compressor connects has two branches, and these two branches are followed slip casting dress appearance district left and right sides simultaneously and are stabilized even pressurization, avoid a pressure tube pressurization to lead to the thick liquid to form the thick liquid disturbance in thick liquid filling district, influence the slip casting effect. Specifically, after the slurry is fully filled, high-pressure gas passes through the sixth pressurizing valve 19 and the fifth pressurizing valve 17 and then is divided into two paths, namely the high-pressure gas passes through the second pressurizing valve 12 and the first pressurizing valve 9 and then permeates into the grouting area 7 from holes on two sides of the metal hollow clamp, so that a high-pressure grouting environment is formed. Wherein, a sixth barometer 18 is arranged at the front end of a sixth pressure valve 19, a fifth barometer 16 is arranged at the rear end of a fifth barometer 17, a third barometer 11 is arranged at the rear end of a second pressure valve 12, and a second barometer 10 is arranged at the rear end of a first pressure valve 9.
In the cleaning device, high-pressure air in the air compressor sequentially passes through the sixth pressure valve 19 and the seventh pressure valve 21 to pump out clean water in the clean water barrel 2, and then the clean water passes through the eighth pressure valve 23 and the fourth pressure valve 15 to clean slurry remained in the pipeline to the waste receiving barrel 4, so that the pipeline is prevented from being blocked and silting is avoided. A seventh barometer 20 is arranged at the front end of the seventh pressure valve 21, an eighth barometer 22 is arranged at the front end of the eighth pressure valve 23, a ninth barometer 24 is arranged at the front end of the ninth pressure valve 25, and a fourth barometer 14 is arranged at the front end of the fourth pressure valve 15.
And the inlets and the outlets of the pipelines are provided with pressurizing valves and barometers so as to monitor and control the pressure in the experimental process in real time, judge the grouting completion condition and ensure that the grouting is smoothly carried out.
The first air pressure meter 8 additionally arranged above the transparent glass 27 at the center of the sealing cover in the grouting sample loading area provides basis for observing the air pressure change in the grouting area 7 and predicting whether grouting is finished. In slip casting dress appearance district, the hollow cylinder anchor clamps of metal wrap up behind the rock sample of treating slip casting, put in airtight slip casting environment, and the thick liquid pump is gone into the back, and the pressurization is followed the lower part and is filled the rock sample all around simultaneously to the thick liquid for slip casting is more complete, and the slip casting in-process sees through the transparent glass lid that is located anchor clamps 5 top and combines the barometer to observe.
The dimension of the rock sample marked with the cracks in the embodiment is 50mm in diameter and 100mm in height.
The grouting method of the experimental test device for reinforcing the fractured rock sample by high-pressure permeation grouting comprises the following steps:
step 1: as shown in fig. 2 and 3, a metal hollow cylindrical fixture 5 is formed by using three fixture units with a central angle of 120 degrees, a prepared standard fractured rock sample is wrapped, the standard fractured rock sample is positioned in the middle of a circular hole of the fixture and is sleeved by a steel hoop, the standard fractured rock sample is placed into a grouting instrument, and a sealing cover 26 is covered; in this embodiment, the center hole of the clamp has a diameter of 50mm and a depth of 100 mm;
step 2: the air compressor 1 is opened and the third pressure valve 13, the sixth pressure valve 19, the seventh pressure valve 21 and the ninth pressure valve 25 are opened, and the ultra-fine cement slurry is injected into the slurry filling zone 6 through the slurry barrel 3. After the slurry is full, closing the third pressurizing valve 13, the seventh pressurizing valve 21 and the ninth pressurizing valve 25, opening the first pressurizing valve 9, the second pressurizing valve 12 and the fifth pressurizing valve 17, and injecting high-pressure air flow for a period of time to create a high-pressure grouting environment;
and step 3: the change of the reading of the first barometer 8 is observed at any moment during the grouting process, and the barometer is used for measuring the pressure of the sealing air in the grouting area 7 at the upper part of the clamp. The reading of the first barometer 8 is unchanged when the slurry is not filled with the rock sample. If the change of the first air pressure gauge 8 is large and the phenomenon of grout turning at the upper part of the rock sample is observed from the sealing cover glass 27 with transparent middle part, the grouting is finished; closing the first pressurizing valve 9, the second pressurizing valve 12, the fifth pressurizing valve 17, and the sixth pressurizing valve 19;
and 4, step 4: after 4-5min, opening a third pressure valve 13 and a fourth pressure valve 15, discharging redundant air in the device, and taking out a sample; and then, closing the third pressure valve 13, opening the sixth pressure valve 19, the seventh pressure valve 21 and the eighth pressure valve 23, pumping out clean water from the clean water barrel 2 to clean the residual slurry in the pipeline to the waste receiving barrel 4 until the outlet water is not turbid, and finishing grouting.
Claims (7)
1. The utility model provides an experiment testing arrangement of crevice rock sample is consolidated in high pressure infiltration slip casting which characterized in that: the grouting device controls the air pressure through a plurality of pressure valves;
the grouting device comprises an air compressor (1), a pressurizing pipe, a grouting pipe and a slurry barrel (3), wherein high-pressure air of the air compressor drives superfine cement slurry in the slurry barrel to enter the bottom of a grouting sample loading area through a ninth pressurizing valve (25) and a third pressurizing valve (13) in the grouting pipe after passing through a sixth pressurizing valve (19) and a seventh pressurizing valve (21) in the pressurizing pipe;
the high-pressure air enters two sides in the grouting area after passing through a sixth pressurizing valve (19), a fifth pressurizing valve (17), a second pressurizing valve (12) and a first pressurizing valve (9) in the pressurizing pipe;
the grouting sample loading area is a sealing structure and comprises a slurry filling area (6), a grouting area (7) and a metal hollow cylindrical clamp (5); the metal hollow cylindrical clamp is positioned between the slurry filling area and the grouting area, holes are formed in the bottom and the side wall of the metal hollow cylindrical clamp, the fractured rock sample is positioned at the center hole of the clamp, and the high-pressure slurry flowing out of the slurry barrel is filled with the rock sample while penetrating from the bottom end of the slurry filling area (6) at the lower part of the clamp and the periphery of the clamp; the top of the metal hollow cylindrical clamp is provided with a sealing cover (26) with a first air pressure gauge (8); the center of the sealing cover is provided with transparent glass (27);
the cleaning device comprises a clear water barrel (2) communicated with an air compressor and a waste receiving barrel (4); high-pressure air in the air compressor sequentially passes through a sixth pressure valve (19) and a seventh pressure valve (21) and then is pumped out of clean water in a clean water barrel, and the clean water passes through an eighth pressure valve (23) and a fourth pressure valve (15) to clean slurry remained in the pipeline to a waste receiving barrel.
2. The experimental test device for reinforcing the fractured rock sample through high-pressure infiltration grouting according to claim 1, characterized in that: the metal hollow cylindrical clamp consists of three 120-degree metal hollow clamp units with holes.
3. The experimental test device for reinforcing the fractured rock sample through high-pressure infiltration grouting according to claim 1, characterized in that: and barometers are arranged at the front ends of the sixth pressurizing valve, the seventh pressurizing valve, the ninth pressurizing valve and the third pressurizing valve.
4. The experimental test device for reinforcing the fractured rock sample through high-pressure infiltration grouting according to claim 1, characterized in that: the second pressure valve (12) and the first pressure valve (9) are positioned on two sides of the metal hollow cylindrical clamp.
5. The experimental test device for reinforcing the fractured rock sample through high-pressure infiltration grouting according to claim 1, characterized in that: and a third air pressure gauge (11) is arranged at the rear end of the second pressurizing valve, and a second air pressure gauge (10) is arranged at the rear end of the first pressurizing valve.
6. The experimental test device for reinforcing the fractured rock sample through high-pressure infiltration grouting according to claim 1, characterized in that: and a fourth air pressure gauge (14) is arranged at the front end of the fourth pressurizing valve.
7. A grouting method for reinforcing a fractured rock sample by high-pressure permeation grouting is characterized by comprising the following steps: an experimental test device for reinforcing a fractured rock specimen by high-pressure infiltration grouting according to claim 1, wherein the grouting method comprises the following steps:
(1) placing a fractured rock sample at the central hole of the metal hollow cylindrical clamp, and covering a sealing cover;
(2) high-pressure air of an air compressor injects superfine cement slurry into the slurry filling area through a plurality of pressurizing valve slurry barrels, and after the slurry is filled, the high-pressure air permeates into the grouting area from holes on two sides of the metal hollow clamp in the grouting sample filling area through a plurality of pressurizing valves;
(3) the reading of the first air pressure gauge changes, the phenomenon of slurry turning on the upper part of the rock sample is observed from the sealing cover, and all the pressure valves are closed;
(4) opening the third pressure valve and the fourth pressure valve, and taking out the sample; and opening the sixth pressure valve, the seventh pressure valve and the eighth pressure valve, and cleaning the residual slurry in the pipeline by using clear water.
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Cited By (6)
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| CN111705853A (en) * | 2020-06-23 | 2020-09-25 | 河海大学 | A high-pressure osmotic grouting device and grouting method capable of monitoring grouting conditions |
| CN112114094A (en) * | 2020-10-15 | 2020-12-22 | 四川大学 | Visualization device for grouting repair of fractured rock sample and use method |
| CN112161898A (en) * | 2020-10-17 | 2021-01-01 | 山东省地矿工程勘察院 | Test device for simulating karst fracture-pipeline water flow and solute transport rule |
| CN114088521A (en) * | 2021-10-28 | 2022-02-25 | 中国矿业大学 | Testing device and testing method for coal rock mass grouting |
| CN114131731A (en) * | 2021-12-03 | 2022-03-04 | 中国人民解放军陆军工程大学 | Calcareous sand indoor grouting reinforcement device |
| CN114411692A (en) * | 2022-02-19 | 2022-04-29 | 深圳百勤建设工程有限公司 | Deformation control device and method for foundation pit soil body |
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