CN117589639A - Grouting material anti-moving water dispersion performance testing device and testing method - Google Patents
Grouting material anti-moving water dispersion performance testing device and testing method Download PDFInfo
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- CN117589639A CN117589639A CN202311268246.2A CN202311268246A CN117589639A CN 117589639 A CN117589639 A CN 117589639A CN 202311268246 A CN202311268246 A CN 202311268246A CN 117589639 A CN117589639 A CN 117589639A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 239000000463 material Substances 0.000 title claims abstract description 64
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 239000006185 dispersion Substances 0.000 title claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims 2
- 230000008859 change Effects 0.000 abstract description 7
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A grouting material anti-moving water dispersion performance testing device comprises: the base is used for fixing all the functional components; the grouting needle cylinder fixing table is arranged on the base; the grouting needle cylinder is enclosed by the first semi-cylindrical groove and the second semi-cylindrical groove to form a sealed slurry accommodating cavity, and the sealed slurry accommodating cavity is arranged on a grouting needle cylinder fixing table through a grouting needle cylinder clamping ring; the pushing motor is arranged on the base and used for controlling the pushing rod to push the grouting material to move; the temperature control water bath box is provided with a shell and a display screen, a thermometer, a turbidity meter and a PH meter are arranged in the shell, the temperature control water bath box is communicated with the slurry accommodating cavity through a grouting connecting pipe, a water inlet pipeline is arranged at the side part of the shell, and a water outlet pipeline is arranged at the opposite side. The invention can effectively test the anti-dynamic water dispersion performance, the retention rate and the filling performance of the slurry, can change the underground water temperature to realize different flow rates and different temperatures by adjusting the temperature control water bath box, and provides a judgment basis for researching the configuration of the slurry.
Description
Technical Field
The invention relates to the technical field of performance testing of grouting materials for tunnel rock soil and underground engineering, in particular to a device and a method for testing the anti-dynamic water dispersion performance of a grouting material.
Background
In the underground engineering construction process of a water-rich karst area, the conditions of karst cave, solution cavity, fault zone area, complex geological conditions and the like are faced, under the special stratum environment, gaps are filled by underground water, dilution of common grouting slurry is easy to cause in synchronous grouting operation, the original slurry water-cement ratio and other parameters are greatly changed, safety accidents are easy to occur, grouting reinforcement is needed, but the underground water is easy to cause grouting material segregation and cementing material loss in the grouting operation process, the original grouting slurry water-cement ratio and other parameters are changed, and the mechanical property and the reinforcement property of a grouting stone body are seriously influenced. Therefore, the anti-water dispersion performance of the grouting material needs to be improved, and the working performance of the grouting material in a water-rich karst environment is ensured.
In the prior art, a complete set of test device is not provided for carrying out integrated test on the dispersion resistance, the retention rate and the filling performance of the slurry in the rich water environment, and a set of test device is developed for testing the turbidity and the pH value change rule of the slurry in the rich water environment and for representing the dispersion resistance, the retention rate and the filling performance of the slurry by referring to a detailed test method and an evaluation standard in DLT 5117-2000 underwater non-dispersion concrete test procedure. However, the path and the mode of the flowing concrete in water and the synchronous grouting slurry are still obviously different, the slurry horizontally enters the shield tail gap through the grouting system in the synchronous grouting construction process, the slurry migration path is less influenced by gravity, and the grouting process cannot be simulated by directly adopting the test rules. Therefore, the original water-dispersion resistance test method needs to be improved so as to be suitable for the evaluation of the water-dispersion resistance of the synchronous grouting slurry.
Therefore, the designer actively researches and improves the grouting material by virtue of years of experience in the industry aiming at the problems in the prior art, and the grouting material anti-water dispersion performance testing device and the grouting material anti-water dispersion performance testing method are provided.
Disclosure of Invention
The invention aims at providing a grouting material water dispersion resistance testing device which aims at solving the defects that in the prior art, the path and the mode of concrete in water flowing by a testing device are still obviously different from those of synchronous grouting slurry entering a water environment, the slurry horizontally enters a shield tail gap through a grouting system in the synchronous grouting construction process, the slurry migration path is less influenced by gravity, the grouting process cannot be simulated by directly adopting a testing rule, and the like.
The second purpose of the invention is to provide a grouting material water dispersion resistance testing method aiming at the defects that in the prior art, the path and the mode of concrete in water flowing by a testing device and synchronous grouting slurry are still obviously different, the slurry horizontally enters a shield tail gap through a grouting system in the synchronous grouting construction process, the slurry migration path is less influenced by gravity, the grouting process and the like cannot be simulated by directly adopting a testing rule.
To achieve the first object of the present invention, the present invention provides a grouting material anti-moving water dispersion performance testing device, comprising:
the base is used for fixing all functional components of the grouting material anti-moving water dispersion performance testing device;
the grouting needle cylinder fixing table is fixedly arranged on the base through a locking bolt;
the grouting device comprises a grouting needle cylinder, a grouting needle cylinder fixing table and a grouting needle cylinder clamping ring, wherein a first semi-cylindrical groove and a second semi-cylindrical groove are enclosed to form a sealed slurry accommodating cavity;
the pushing motor is fixedly arranged on the base, and speed parameters are adjusted on a digital display screen of the pushing motor so as to control a grouting piston in a grouting liquid accommodating cavity driven by the pushing motor to drive grouting materials to move along the pushing direction;
the temperature control water bath box is provided with a shell and a display screen arranged on the outer side of the shell, a thermometer, a turbidity meter and a PH meter are respectively arranged in the shell, the temperature control water bath box is communicated with the slurry accommodating cavity through a grouting connecting pipe, a water inlet pipeline with a water inlet control valve is arranged on the side part of the shell, and a water outlet pipeline is arranged on the opposite side of the water inlet pipeline.
Optionally, a sealing sleeve is arranged between the push rod and the grouting needle cylinder.
Optionally, a sealing sleeve is arranged between the grouting needle cylinder and the grouting connecting conduit.
Optionally, the axes of the push rod, the grouting needle cylinder and the water inlet control valve are positioned on the same horizontal line.
Optionally, the propulsion motor, the grouting needle cylinder, the grouting connecting pipe, the water inlet control valve and the grouting needle cylinder fixing table are all made of metal materials, the sealing sleeve is made of high-damping rubber materials, and the temperature control water bath box is made of glass transparent materials.
In order to achieve the second object of the present invention, the present invention provides a method for testing an apparatus for testing the anti-dynamic water dispersion performance of a grouting material, the method for testing the anti-dynamic water dispersion performance of a grouting material comprising:
step S1 is executed: extracting grouting materials to be detected to preset scale marks by adopting a grouting needle cylinder;
step S2 is executed: retracting the push rod to the end part of the grouting needle cylinder, which is close to one side of the propulsion motor, horizontally fixing the grouting needle cylinder at the corresponding position of the grouting needle cylinder fixing table, closing the feeding control valve, and forming a closed slurry accommodating cavity;
step S3 is executed: opening a water inlet control valve, injecting a clean water sample, enabling the water body to flow, and adjusting a temperature control component in a display screen of the temperature control water bath box to enable the temperature of the clean water sample to be adjusted to a preset temperature;
step S4 is executed: pushing the push rod to move towards the grouting needle cylinder until the push rod is just attached to the grouting piston, setting a pushing speed v through the digital display screen, starting the pushing motor, enabling the grouting material to be tested in the slurry accommodating cavity to be pushed into the water bath box at a constant speed v, and closing the pushing motor after the grouting material to be tested is pushed;
step S5 is executed: and standing the slurry in the temperature-controlled water bath box, then testing the turbidity and the PH value of the water body after the grouting material to be tested is injected into the clean water sample, and outputting the test result through a display screen.
Optionally, in step S5, the slurry in the temperature-controlled water bath tank is allowed to stand for at least 1min and more.
In summary, the grouting material anti-moving water dispersion performance testing device can effectively test the anti-moving water dispersion performance, the retention rate and the filling performance of the slurry, can change the underground water temperature to realize different flow rates and different temperatures through adjusting the temperature control water bath tank, and can test and evaluate the anti-moving water dispersion performance of the synchronous grouting slurry, and particularly can effectively evaluate the anti-moving water dispersion improvement effect of the anti-dispersing agent on the slurry, thereby providing a judgment basis for researching the optimization of the anti-dispersing agent performance and the configuration of the anti-moving water dispersion synchronous grouting slurry.
Drawings
FIG. 1 is a schematic diagram showing the structure of a grouting material anti-dynamic water dispersion performance testing device;
FIG. 2 is a sectional view of a grouting cylinder of the grouting material anti-dynamic water dispersion performance testing device of the invention;
FIG. 3 is a schematic diagram showing the structure of a temperature-controlled water bath box of the grouting material anti-dynamic water dispersion performance testing device;
FIG. 4 is a flow chart showing a method for testing the anti-water dispersion performance of the grouting material.
Detailed Description
For a detailed description of the technical content, constructional features, achieved objects and effects of the present invention, the following detailed description will be given with reference to the accompanying drawings.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a grouting material anti-dynamic water dispersion performance testing device according to the present invention. FIG. 2 is a sectional view of a grouting cylinder of the grouting material anti-dynamic water dispersion performance testing device of the invention. Fig. 3 is a schematic diagram of the structure of a temperature-controlled water bath box of the grouting material anti-dynamic water dispersion performance testing device. The grouting material anti-moving water dispersion performance testing device comprises:
the base 1 is used for fixing all functional components of the grouting material anti-moving water dispersion performance testing device;
a grouting needle cylinder fixing table 2, wherein the grouting needle cylinder fixing table 2 is fixedly arranged on the base 1 through a locking bolt 21;
the grouting device comprises a grouting needle cylinder 3, wherein the grouting needle cylinder 3 is enclosed by a first semi-cylindrical groove 31 and a second semi-cylindrical groove 32 to form a sealed slurry accommodating cavity 30, a feeding funnel 33 communicated with the slurry accommodating cavity 30 is arranged on the grouting needle cylinder 3, a feeding control valve 34 is arranged between the feeding funnel 33 and the slurry accommodating cavity 30, and the grouting needle cylinder 30 is further fixedly arranged on a grouting needle cylinder fixing table 2 through grouting needle cylinder clamping rings 35 at two ends of the grouting needle cylinder fixing table 2;
the propulsion motor 4 is fixedly arranged on the base 1, and the speed parameter is regulated on a digital display screen 41 of the propulsion motor 4 so as to control a push rod 42 driven by the propulsion motor 4 to propel the grouting piston 36 in the slurry accommodating cavity 30 to drive grouting materials to move along the thrust direction;
the temperature-controlled water bath 5, the temperature-controlled water bath 5 has a shell 51 and a display screen 52 arranged outside the shell 51, a thermometer 53, a turbidimeter 54 and a PH meter 55 are respectively arranged in the shell 51, the temperature-controlled water bath 5 is communicated with the slurry accommodating cavity 30 through a grouting connecting pipe 37, a water inlet pipeline 57 with a water inlet control valve 56 is arranged at the side part of the shell 51, and a water outlet pipeline 58 is arranged at the opposite side of the water inlet pipeline 57.
As a specific embodiment, preferably, in order to enhance the tightness between the push rod 42 and the grouting cylinder 3 and the tightness between the grouting cylinder 3 and the grouting connecting duct 37, a sealing sleeve 59 is disposed between the push rod 42 and the grouting cylinder 3, and a sealing sleeve 59 is disposed between the grouting cylinder 3 and the grouting connecting duct 37. The axes of the push rod 42, the grouting needle cylinder 3 and the water inlet control valve 56 are positioned on the same horizontal line. The propulsion motor 4, the grouting needle cylinder 3, the grouting connecting pipe 37, the water inlet control valve 56 and the grouting needle cylinder fixing table 2 are all made of metal materials, the sealing sleeve 59 is made of high damping rubber materials, the temperature control water bath 5 is made of transparent materials such as glass, and the like, so that the water dispersibility, the fluidity and the filling performance of the slurry can be conveniently observed when the slurry is injected into water.
In order to more intuitively disclose the technical scheme of the invention and highlight the beneficial effects of the invention, the working principle of the grouting material anti-dynamic water dispersion performance testing device and the grouting material anti-dynamic water dispersion performance testing method are described with specific embodiments. In the specific embodiments, the structural form, the connection manner, the sequence of steps and the like of each functional component are only listed and should not be construed as limiting the technical scheme of the invention.
With continued reference to fig. 4, and with combined reference to fig. 1 to 3, the method for testing the anti-water-dispersion performance of the grouting material includes:
step S1 is executed: extracting grouting materials to be detected to preset scale marks by adopting a grouting needle cylinder 3;
step S2 is executed: retracting the push rod 42 to the end part of the grouting needle cylinder 3, which is close to one side of the propulsion motor 4, horizontally fixing the grouting needle cylinder 3 at the corresponding position of the grouting needle cylinder fixing table 2, closing the feeding control valve 34, and forming a closed slurry accommodating cavity 30;
step S3 is executed: opening a water inlet control valve 56, injecting a clean water sample, enabling the water body to flow, and adjusting a temperature control component in a display screen 52 of the temperature control water bath box 5 to enable the temperature of the clean water sample to be adjusted to a preset temperature;
step S4 is executed: pushing the push rod 42 to move towards the grouting needle cylinder 3 until the push rod 42 is just attached to the grouting piston 36, setting a pushing speed v through the digital display screen 41, starting the pushing motor 4, enabling the grouting material to be detected in the slurry accommodating cavity 30 to be pushed into the water bath 5 at a constant speed v, and closing the pushing motor 4 after the grouting material to be detected is pushed;
step S5 is executed: the slurry in the temperature-controlled water bath 5 is allowed to stand, and then the turbidity and PH of the water body after the grouting material to be tested is injected into the clean water sample are tested, and the test result is outputted through the display screen 52.
As a person skilled in the art can easily understand, the grouting material anti-water dispersion performance testing device disclosed by the invention is mechanically operated, errors caused by manual operation are reduced to the greatest extent, the push rods 42 with different speeds are controlled to move forwards by the propulsion motor 4, the grouting liquid in the grouting needle cylinder 3 is injected into the water bath 5 with the speed of equal division level, the grouting liquid injection mode and path can be better simulated, and meanwhile, the change rule of the grouting liquid anti-water dispersion performance along with grouting pressure can be considered. More specifically, in step S5, the slurry in the temperature-controlled water bath 5 is left to stand for at least 1min and more.
Clearly, compared with the prior art, the invention has the following outstanding substantive features and significant advances:
(1) The water body flows through controlling the water inlet control valve of the water bath box, so that the dispersion performance of the slurry in a flowing water state is better simulated;
(2) The problem of inconsistent slurry feeding speed is effectively solved by adjusting the propelling speed of the propelling motor and the pushing rod, the injection mode and the injection path of slurry are better simulated, and the dilution flushing effect of the slurry under the condition of different flow rates of groundwater can be simulated;
(3) The comparative research of the anti-dispersion performance of the anti-dispersion agents of different types on the slurry can be realized by replacing the anti-dispersion agents of different types and different parameters and carrying out an anti-water dispersion test on the corresponding slurry under the condition of single propulsion speed;
(4) The change rule of the water body temperature after grouting injection can be monitored in real time, and the hydration process of the grouting material in water is reflected;
(5) The temperature-control water bath box made of transparent materials is beneficial to visually observing the water dispersibility, fluidity and filling performance of the slurry when the slurry is injected into water, can effectively test the water dispersibility, the retention rate and the filling performance of the slurry, and reflects the hydration process of the grouting material through the change of the temperature of the water body;
(6) By installing the water inlet pipeline and the water outlet pipeline, the simulation of the flowing state of the groundwater can be realized, and the influence of the flowing state of the groundwater on the performance of grouting materials is reflected.
In summary, the grouting material anti-moving water dispersion performance testing device can effectively test the anti-moving water dispersion performance, the retention rate and the filling performance of the slurry, can change the underground water temperature to realize different flow rates and different temperatures through adjusting the temperature control water bath tank, and can test and evaluate the anti-moving water dispersion performance of the synchronous grouting slurry, and particularly can effectively evaluate the anti-moving water dispersion improvement effect of the anti-dispersing agent on the slurry, thereby providing a judgment basis for researching the optimization of the anti-dispersing agent performance and the configuration of the anti-moving water dispersion synchronous grouting slurry.
It will be appreciated by those skilled in the art that various modifications and variations can be made to the invention without departing from the spirit or scope of the invention. Accordingly, the present invention is deemed to cover any modifications and variations, if they fall within the scope of the appended claims and their equivalents.
Claims (7)
1. The utility model provides a slip casting material anti-moving water dispersion capability test device which characterized in that, slip casting material anti-moving water dispersion capability test device includes:
the base is used for fixing all functional components of the grouting material anti-moving water dispersion performance testing device;
the grouting needle cylinder fixing table is fixedly arranged on the base through a locking bolt;
the grouting device comprises a grouting needle cylinder, a grouting needle cylinder fixing table and a grouting needle cylinder clamping ring, wherein a first semi-cylindrical groove and a second semi-cylindrical groove are enclosed to form a sealed slurry accommodating cavity;
the pushing motor is fixedly arranged on the base, and speed parameters are adjusted on a digital display screen of the pushing motor so as to control a grouting piston in a grouting liquid accommodating cavity driven by the pushing motor to drive grouting materials to move along the pushing direction;
the temperature control water bath box is provided with a shell and a display screen arranged on the outer side of the shell, a thermometer, a turbidity meter and a PH meter are respectively arranged in the shell, the temperature control water bath box is communicated with the slurry accommodating cavity through a grouting connecting pipe, a water inlet pipeline with a water inlet control valve is arranged on the side part of the shell, and a water outlet pipeline is arranged on the opposite side of the water inlet pipeline.
2. The grouting material anti-dynamic water dispersion performance testing device according to claim 1, wherein a sealing sleeve is arranged between the push rod and the grouting cylinder.
3. The grouting material anti-dynamic water dispersion performance testing device according to claim 1, wherein a sealing sleeve is arranged between the grouting needle cylinder and the grouting connecting conduit.
4. The grouting material anti-dynamic water dispersion performance testing device according to claim 1, wherein the axes of the push rod, the grouting needle cylinder and the water inlet control valve are positioned on the same horizontal line.
5. The grouting material anti-dynamic water dispersion performance testing device according to claim 1, wherein the propulsion motor, the grouting needle cylinder, the grouting connecting pipe, the water inlet control valve and the grouting needle cylinder fixing table are all made of metal materials, the sealing sleeve is made of high-damping rubber materials, and the temperature control water bath box is made of glass transparent materials.
6. A method of testing a grouting material anti-dynamic water dispersion performance testing device according to claim 1, wherein the grouting material anti-dynamic water dispersion performance testing method comprises:
step S1 is executed: extracting grouting materials to be detected to preset scale marks by adopting a grouting needle cylinder;
step S2 is executed: retracting the push rod to the end part of the grouting needle cylinder, which is close to one side of the propulsion motor, horizontally fixing the grouting needle cylinder at the corresponding position of the grouting needle cylinder fixing table, closing the feeding control valve, and forming a closed slurry accommodating cavity;
step S3 is executed: opening a water inlet control valve, injecting a clean water sample, enabling the water body to flow, and adjusting a temperature control component in a display screen of the temperature control water bath box to enable the temperature of the clean water sample to be adjusted to a preset temperature;
step S4 is executed: pushing the push rod to move towards the grouting needle cylinder until the push rod is just attached to the grouting piston, setting a pushing speed v through the digital display screen, starting the pushing motor, enabling the grouting material to be tested in the slurry accommodating cavity to be pushed into the water bath box at a constant speed v, and closing the pushing motor after the grouting material to be tested is pushed;
step S5 is executed: and standing the slurry in the temperature-controlled water bath box, then testing the turbidity and the PH value of the water body after the grouting material to be tested is injected into the clean water sample, and outputting the test result through a display screen.
7. The method according to claim 6, wherein in step S5, the slurry in the water bath tank is allowed to stand for at least 1 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311268246.2A CN117589639A (en) | 2023-09-27 | 2023-09-27 | Grouting material anti-moving water dispersion performance testing device and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311268246.2A CN117589639A (en) | 2023-09-27 | 2023-09-27 | Grouting material anti-moving water dispersion performance testing device and testing method |
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| CN117589639A true CN117589639A (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311268246.2A Pending CN117589639A (en) | 2023-09-27 | 2023-09-27 | Grouting material anti-moving water dispersion performance testing device and testing method |
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| Country | Link |
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| CN (1) | CN117589639A (en) |
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2023
- 2023-09-27 CN CN202311268246.2A patent/CN117589639A/en active Pending
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