CN109444223B - High-pressure curtain grouting consolidation simulation experiment method and device - Google Patents
High-pressure curtain grouting consolidation simulation experiment method and device Download PDFInfo
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- CN109444223B CN109444223B CN201811033717.0A CN201811033717A CN109444223B CN 109444223 B CN109444223 B CN 109444223B CN 201811033717 A CN201811033717 A CN 201811033717A CN 109444223 B CN109444223 B CN 109444223B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
Abstract
The invention provides a high-pressure curtain grouting consolidation simulation experiment method and device, and belongs to the technical field of mine curtain grouting. The system comprises a simulation confining pressure cabin which is filled with water and can simulate real underground water pressure, a slurry experiment cabin which simulates real grouting and the pressure of the real grouting is arranged in the confining pressure cabin, and the slurry experiment cabin is connected with a consolidation parameter monitoring device so as to detect the slurry state change under different drainage conditions or set conditions and monitor the slurry state change in real time to obtain slurry consolidation parameters. The method solves the technical problems that the technical parameters of the grouting technology are inaccurate to determine and are too far away from the real grouting environment in the prior art, can obtain relatively accurate test data which is closer to the reality in a simulation test, greatly shortens the test time, is beneficial to scientific selection of the optimal grouting technology and the experimental research of novel grouting materials, improves the grouting quality and efficiency of curtain grouting, and has great economic and social benefits.
Description
Technical Field
The invention relates to the technical field of mine curtain grouting, in particular to a high-pressure curtain grouting consolidation experimental device.
Background
At present, no special device or platform for the slurry coagulation and solidification experiment exists in China. Most of the existing slurry coagulation and solidification experiments are carried out under natural conditions, which are far from the real grouting environment, and relatively accurate test data cannot be obtained in the tests. The main defects are as follows:
1. various experimental parameters of the slurry can not be carried out under the conditions of setting various pressures according to the design requirements;
2. the setting and curing time is long (the initial setting time generally needs about 7 days);
3. the grouting process cannot be tested, such as the setting and curing time and strength of the slurry under different pressure combinations and drainage conditions;
4. the whole-process monitoring of the coagulation and solidification process of the slurry cannot be realized.
Therefore, the determination of the technical parameters of grouting material selection, grout proportion selection and grouting manufacturing technology in the field of curtain grouting is still based on empirical data and is very inaccurate. The quality and efficiency of mine curtain grouting are seriously affected.
Disclosure of Invention
The invention aims to provide a high-pressure curtain grouting consolidation simulation experiment method and device, which are used for solving the technical problems that the technical parameters of the grouting technology are not accurately determined and are too far away from the real grouting environment in the prior art, relatively accurate test data closer to the reality can be obtained in a simulation experiment, the experiment time is greatly shortened, the experimental study on scientifically selecting the optimal grouting technology and novel grouting materials is facilitated, the grouting quality and efficiency of curtain grouting are improved, and the high-pressure curtain grouting consolidation simulation experiment method and device have great economic benefit and social benefit.
In order to achieve the purpose, the invention adopts the technical scheme that: the high-pressure curtain grouting consolidation simulation experiment method is characterized by comprising the following steps: firstly, establishing a simulated confining pressure cabin which is filled with water and can simulate real launching pressure, arranging a slurry experiment cabin which simulates real grouting and pressure thereof in the confining pressure cabin, and connecting the slurry experiment cabin with a consolidation parameter monitoring device so as to detect the slurry state under different drainage conditions or set conditions for real-time monitoring and obtain each slurry consolidation parameter.
Preferably, the consolidation parameter monitoring device adopts a resistance detection method to identify various state characteristic values of different types of slurry, and determines physical and mechanical parameters of the test block corresponding to the curve and the resistance value according to the test of the test block formed at the moment corresponding to the curve form and the resistance value of the slurry; and various parameters represented by the curve are enriched by adopting interpolation and extrapolation methods.
The technical scheme adopted by the invention provides a device used in the high-pressure curtain grouting consolidation simulation experiment method, which is characterized in that: comprises an enclosing ballast cabin, a slurry experiment cabin, a grouting pump, a constant pressure drainage device and a consolidation parameter monitoring device; the slurry experiment chamber is arranged in the confining pressure chamber, water is filled in the confining pressure chamber and the real underground water pressure is simulated, and the cavity of the confining pressure chamber is connected with the constant pressure drainage device; the grouting pump is communicated with the slurry experiment cabin through a grouting pipe, the grouting pump injects slurry with stable pressure into the slurry experiment cabin, the outer wall of the slurry experiment cabin is provided with filter cloth, and the slurry experiment cabin is connected with the consolidation parameter monitoring device.
Preferably, the constant-pressure drainage device comprises a pressure sensor, a pressure control and data acquisition system, a water injection pressurizing pump and a constant-pressure drainage valve; the pressure sensor connected with the confining pressure cabin is connected with the pressure control and data acquisition system, and the water injection pressure pump and the constant pressure drainage valve connected with the confining pressure cabin are respectively connected with the pressure control and data acquisition system.
Preferably, the pressure sensor is connected with a display.
Preferably, the pressure sensor is mounted at the top of the ballast tank, and the constant pressure drain valve is mounted at the lower bottom of the ballast tank.
Preferably, the drainage valve is connected with the pressure control and data acquisition system through a drainage collector; a grouting pressure sensor is arranged on the grouting pump or the grouting pipe; the grouting pressure sensor is connected with a display; the grouting pressure sensor is connected with the pressure control and data acquisition system; the consolidation parameter monitoring device is connected with the pressure control and data acquisition system.
Preferably, the slurry experiment chamber comprises: the device comprises a test cabin base, a test cabin top base, an upper conical pull rod pipe, a lower conical pull rod pipe, an observation electrode and a drainage cylinder with a bottom; the test cabin base and the test cabin top seat are both provided with central stepped holes, the test cabin base and the test cabin top seat are both connected with a drainage tube with a bottom through threads, the bottom of the drainage tube with the bottom is arranged on one side of the test cabin base, an upper conical pull rod tube and a lower conical pull rod tube are respectively fixed and communicated with the test cabin base and the test cabin top seat through nuts, the cylinder surface and the bottom surface of the drainage tube with the bottom are provided with a plurality of drainage holes, and the inner wall of the drainage tube with the bottom is provided with filter cloth; 2 testing electrodes with insulating layers, which are close to a base of the test chamber, are connected with an external consolidation parameter monitoring device through lower conical pull rod pipes, and upper conical pull rod pipes are communicated with grouting pipes.
Preferably, the drain cylinder with the bottom is provided with an axial cutting seam which divides the drain cylinder with the bottom into two halves.
Preferably, the following components: the consolidation parameter monitoring device is a resistance tester; the experiment cabin is connected with the resistance tester; the pressure control of the resistance tester is connected with the data acquisition system.
The invention has the technical effects that: compared with the prior art, the grouting environment simulation device can simulate a real grouting environment, relatively accurate test data are obtained in the test, the test time is greatly shortened, the test data are closer to reality, the best grouting process and the test research of novel grouting materials are convenient to select, and the grouting quality and efficiency are improved. Has great economic benefit and social benefit. The main functions are as follows:
1) various pressure and drainage conditions can be set as designed.
2) The experimental time is greatly shortened and experimental data are closer to reality.
3) The test in the aspect of grouting process can be carried out, and the optimal grouting process is selected by measuring the slurry solidification time and the slurry solidification strength under different pressure combinations and drainage conditions.
4) The whole process of the slurry coagulation and solidification experiment is conveniently monitored, and the slurry state of each time period is determined.
5) The experiment and research of the novel grouting material are convenient to develop.
The present invention will be further described in detail with reference to the following examples for better understanding of the present invention, but the scope of the present invention is not limited to the examples.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of the overall structure and principle of the device of the present invention.
Fig. 2 is a schematic structural diagram of the condensation curing chamber in fig. 1.
Fig. 3 is an exploded view of the assembled structure of the test chamber of fig. 2.
Fig. 4 is a schematic view of the assembled structure of fig. 3.
FIG. 5 is a schematic flow chart of the present invention.
The reference numerals in the figures mean:
in FIG. 1, 1-the capsule pressure sensor connection and display; 2-grouting pressure sensor connection and display; 3-grouting pipe; 4-a constant pressure drain valve;
in FIG. 2, 3-1 surround the ballast; 3-24 confining pressure chamber pressure gauge and sensor; 3-3. water injection pressure regulating holes of the confining pressure cabin; 3-4 constant pressure drainage valve of the confining pressure cabin; 3-5, a lead leading-out hole (a hollow conical pull rod) for resistance monitoring of the experiment chamber; 3-6 experiment chamber base; 3-7 resistance test electrodes of the experimental chamber; 3-8 experiment chamber drainage panel (longitudinally cut into two halves of cylinder with holes, two ends of the cylinder are connected with the base by screw threads); 3-9 experimental cabin slurry inlet holes (the conical pull rod with the hole is connected with a grouting pump); 3-10 experimental cabin roof seats; 3-11. high-pressure water body in the confining pressure cabin; 3-12 conical pull rods of the experiment cabin; 3-13 the drainage direction of the experimental chamber is shown; 3-14 constant pressure drainage device of the confining pressure cabin; 3-15 observing the lead; 3-16 insulating layers; 3-17 water permeable filter layer
In FIG. 3, 19-test chamber base; 20-upper tapered tie rod; 21-fixing the bolt; 22-a drainage panel (two ends are provided with external thread buckles, round holes with the distance of 10mm and the aperture of 2 mm) 23-an electrode insulating layer; 24-observation leads; 25-an observation electrode; 26-test chamber roof seat; 27-lower tapered tie rod; 28-lower anchor bolts; 29-a central hole of the conical pull rod; 30-leading out a central hole by a lead; 31-a cone head; 32-pull rod (with external thread buckle) 33-top base center hole; 34-a drainage panel external thread buckle; 35-a drain hole; 36-drainage panel longitudinal cut seam.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 4, the technical solution adopted by the present invention is: the high-pressure curtain grouting consolidation simulation experiment method is characterized by comprising the following steps: firstly, establishing a simulated confining pressure cabin which is filled with water and can simulate real launching pressure, arranging a slurry experiment cabin which simulates real grouting and pressure thereof in the confining pressure cabin, and connecting the slurry experiment cabin with a consolidation parameter monitoring device so as to detect the slurry state under different drainage conditions or set conditions for real-time monitoring and obtain each slurry consolidation parameter.
The method solves the technical problems that the technical parameters of the grouting technology are inaccurate to determine and are too far away from the real grouting environment in the prior art, can obtain relatively accurate test data which is closer to the reality in a simulation test, greatly shortens the test time, is beneficial to scientific selection of the optimal grouting technology and the experimental research of novel grouting materials, improves the grouting quality and efficiency of curtain grouting, and has great economic and social benefits.
As a specific embodiment provided by the present invention, preferably, the consolidation parameter monitoring device adopts a resistance detection method to identify various state characteristic values of different types of slurry, and determines physical and mechanical parameters of the test block corresponding to the curve and the resistance value according to the test of the test block formed at the moment corresponding to the curve form and the resistance value of the slurry; and various parameters represented by the curve are enriched by adopting interpolation and extrapolation methods. The use is convenient and accurate.
Referring to fig. 1 and fig. 2, the technical scheme adopted by the invention provides a device used in a high-pressure curtain grouting consolidation simulation experiment method, which comprises a surrounding cabin, a slurry experiment cabin, a grouting pump, a constant pressure drainage device and a consolidation parameter monitoring device; the slurry experiment chamber is arranged in the confining pressure chamber, water is filled in the confining pressure chamber and the real underground water pressure is simulated, and the cavity of the confining pressure chamber is connected with the constant pressure drainage device; the grouting pump is communicated with the slurry experiment cabin through a grouting pipe, the grouting pump injects slurry with stable pressure into the slurry experiment cabin, the outer wall of the slurry experiment cabin is provided with filter cloth, and the slurry experiment cabin is connected with the consolidation parameter monitoring device. As a specific embodiment provided by the present invention.
The method solves the technical problems that the technical parameters of the grouting technology are inaccurate to determine and are too far away from the real grouting environment in the prior art, can obtain relatively accurate test data which is closer to the reality in a simulation test, greatly shortens the test time, is beneficial to scientific selection of the optimal grouting technology and the experimental research of novel grouting materials, improves the grouting quality and efficiency of curtain grouting, and has great economic and social benefits.
Referring to fig. 1, as a specific embodiment provided by the present invention, preferably, the constant pressure drainage apparatus includes a pressure sensor, a pressure control and data acquisition system, a water injection pressure pump and a constant pressure drainage valve; the pressure sensor connected with the confining pressure cabin is connected with the pressure control and data acquisition system, and the water injection pressure pump and the constant pressure drainage valve connected with the confining pressure cabin are respectively connected with the pressure control and data acquisition system.
Referring to fig. 1, as an embodiment provided by the present invention, preferably, the pressure sensor is connected with a display.
Referring to fig. 1, as an embodiment provided by the present invention, preferably, the pressure sensor is installed at the top of the ballast tank, and the constant pressure drain valve is installed at the lower bottom of the ballast tank.
Referring to fig. 1, as a specific embodiment provided by the present invention, preferably, the drain valve is connected to the pressure control and data acquisition system through a drain collector; a grouting pressure sensor is arranged on the grouting pump or the grouting pipe; the grouting pressure sensor is connected with a display; the grouting pressure sensor is connected with the pressure control and data acquisition system; the consolidation parameter monitoring device is connected with the pressure control and data acquisition system.
Referring to fig. 2 and 3, as an embodiment provided by the present invention, preferably, the structure of the slurry experiment chamber comprises: a test chamber base 19, a test chamber top base 26, an upper conical pull rod pipe 20, a lower conical pull rod pipe 27, an observation electrode 25 and a drain cylinder 22 with a bottom; the test chamber base 19 and the test chamber top seat 26 are both provided with a central stepped hole, the test chamber base 19 and the test chamber top seat 26 are both connected with the drain cylinder 22 with the bottom through threads, the bottom of the drain cylinder 22 with the bottom is arranged at one side of the test chamber base 19, the upper conical pull rod pipe 20 and the lower conical pull rod pipe 27 are respectively fixed and communicated with the test chamber base 19 and the test chamber top seat 26 through nuts, the cylinder surface and the bottom surface of the drain cylinder 22 with the bottom are provided with a plurality of drain holes, and the inner wall of the drain cylinder is provided with filter cloth 37; the 2 test electrodes with insulating layers close to the test chamber base 19 are connected with an external consolidation parameter monitoring device through a lower conical pull rod pipe 27, and an upper conical pull rod pipe 20 is communicated with a grouting pipe.
Referring to fig. 3, as one embodiment of the present invention, it is preferred that the bottomed drain cylinder 22 be provided with an axial cut slit dividing the bottomed drain cylinder 22 into two halves.
Referring to fig. 1, as a specific embodiment provided by the present invention, preferably, the consolidation parameter monitoring device is a resistance tester; the use is convenient and accurate. The experiment cabin is connected with the resistance tester; the pressure control of the resistance tester is connected with the data acquisition system.
The invention aims to provide a method for automatically monitoring the slurry state under the high-pressure drainage condition, which has the following advantages: firstly, the working environment of the maximum confining pressure of 20MPa and 10MPa of the grouting pressure can be simulated; the slurry state under different drainage conditions can be monitored in real time; the method can test and monitor various parameters with the resistance as a characteristic value in real time, and firstly, the key time nodes of the slurry, such as initial setting time, intermediate setting time and the like, are measured; and secondly, monitoring the strength of each time node of the slurry in real time. And the parameters of a third other required measuring point are water content, porosity and the like. And fourthly, directly reflecting the test data into the curve, and reducing the manual analysis and processing time. The implementation of the method can make up the blank that the slurry state cannot be monitored in real time under the high-pressure drainage condition, key parameters required in curtain grouting engineering design are obtained on the basis, the construction design and the construction process are optimized, the construction cost is reduced, and great economic benefits and social benefits are achieved.
The invention discloses a method for monitoring the state of slurry in real time under a high-pressure drainage condition, which is shown in a test flow chart and sequentially comprises the following steps of:
preparation of slurry
Secondly, pouring the prepared slurry into a self-made grouting pump slurry pool;
setting the test pressure of the grouting pump;
an experiment cabin is installed and is installed in the confining pressure cabin, and a grouting pump is connected to a near-slurry opening of the experiment cabin
Carrying out water injection in the confining pressure cabin and pressurizing to the design pressure;
sixthly, starting a grouting pump to enable the slurry to enter a pressure bin for drainage and condensation;
the slurry status monitoring (characteristic of resistance) was performed by turning on real-time monitoring equipment.
In one embodiment, the main equipment is as follows:
the high-pressure grouting pump is self-machined, is GZ-1 in model number, can bear the maximum grouting pressure of 20MPa, has a stability coefficient of +/-0.1 percent and has a flow of 0-5L/min;
the core equipment of the invention is that the condensation curing chamber consists of an enclosing chamber and a test chamber. The ballasting chamber is a device for simulating the groundwater environment, is manufactured by a professional company designed and entrusted by the inventor, and has the maximum bearing pressure of 10MPa, the inner diameter of 800mm and the height of 1500 mm. The wall thickness is 14 mm; the device comprises 7 inlets and outlets in total, namely a slurry inlet, a lead outlet (an experimental cabin inlet), a pressure monitoring port, an exhaust port, a safe pressure relief port, a water injection port, a reservation port and the like.
The experiment chamber is connected with a confining pressure chamber slurry inlet and then enters the confining pressure chamber from the bottom of the confining pressure chamber, the bottom of the confining pressure chamber is sealed, and an observation lead is led out from a conical pull rod at the bottom.
The model of the automatic pressure control valve is ssssss, and the maximum control pressure is 10 MPa.
The experimental cabin is a place for setting and solidifying the slurry and is designed and entrusted to professional manufacture by the inventor. Mainly comprises 2 conical heads, 2 conical pull rods, a top base, a bottom base, 2 drainage panels, filter cloth and a monitoring device.
The outer diameter of the conical head is 61.04 mm; length 52 mm; the bottom taper angle is 5 degrees; the length of the tapered pull rod is 130 mm; the outer diameter is 34 mm; the diameter of the central circular hole is 26 mm.
The top base is 110mm high and the outer diameter is 100 mm; the central hole is 54.5mm, and the inner diameter is 81-41mm
The drainage panel is composed of a cylinder with drainage holes which is longitudinally cut into two halves. The length is 125mm, the middle part has an external diameter of 89mm and an internal diameter of 69 mm. The length of the screw threads at two ends is 30mm, and the outer diameter of the screw thread is 81 mm; the diameter of the drain hole is 1mm, and the distance between the drain holes is 10 mm; the middle longitudinal cutting seam is less than 0.08mm
The filter cloth is 225mm high and 220mm wide. The model can be self-selected according to the water permeability.
The monitoring device consists of a conical head insulating layer and a zirconium-copper alloy plate. The thickness of the insulating plate is 10mm, the thickness of the zirconium-copper alloy plate is 3mm, the height is 33mm, and the width is 31 mm. The observation lead is led out from the midline hole, and is shown in detail in figures 3, 4 and 5.
By the testing method, the grouting pump can provide stable pressure of 0-20 MPa, the stability coefficient is +/-0.1%, and the required flow is 0-5L/min; the drainage condition is 1-200 cm/d; the tested slurry is all the slurry in the current mine grouting water plugging field; the slurry state is tested by adopting a resistor, the resistance of the slurry is automatically recorded, an independent power supply is adopted for supplying power, and the direct current is 30-60 volts. Powering on for 1min before each monitoring, and powering off after reading the resistance value; the monitoring interval is 3-10 min. The use voltage and the monitoring interval can be set independently according to different slurries.
The monitoring device of the invention: the grouting pressure sensor, the confining pressure cabin pressure sensor, the resistance sensor and the water displacement sensor are customized according to the design.
The pressure control and data acquisition system is compiled by professional company of my company's design entrust, can set for water injection booster pump pressure, grouting pump pressure on the system, and the water injection booster pump can compensate confined pressure cabin pressure's not enough at any time, and data acquisition system can automatic acquisition grouting pressure sensor, confined pressure cabin pressure sensor, resistance sensor and displacement sensor's data to can discern and the warning suggestion according to the resistance value and the displacement value that have markd. The length of the test process can be set according to different test purposes.
An example test procedure:
the set parameters of the test are as follows: grouting pressure is 4.0 MPa; the pressure of the confining pressure cabin is 2.0MPa.
The ratio of the test slurry is as follows: water: peng and moistening soil: the cement is as follows: 11.9:1: 2.1
The test was carried out for the purpose of measuring the initial setting of the slurry under a set pressure, and the initial setting point was indicated at the center point of 15mm on the top surface (the side of the slurry inlet) of the sample. The test steps are as follows:
1. preparing the slurry by the pulping equipment 1 according to the design requirement
2. Determining initial set point marking parameters of the slurry
2.1 guiding the grout into the grout tank of the grouting pump 2
2.2 setting pressure sensor parameters (can be set at will, without taking test parameters as the standard, the larger the set pressure, the shorter the measuring time)
2.3 details of the assembled laboratory Chamber are shown in FIGS. 3 and 4
2.3 connecting the grouting pump and the experiment cabin, and immersing the experiment cabin in water (in an insulation state with the ground).
2.4 connection data acquisition System
2.5 starting a grouting pump for testing, and determining the initial setting mark point of the slurry to be 57-60 ohms after multiple tests. (test using a voltage of 30 volts DC)
3. Setting parameters
Grouting pressure on a control system is 4.0 MPa; the pressure of the confining pressure cabin is 2.0MPa (after the confining pressure cabin is filled with water)
4. The grouting pump was started and the test was started. The data acquisition system acquires the grouting pressure, the confining pressure chamber pressure, the resistance value and the water discharge quantity value once every 10 minutes. Test data can be selectively collected according to requirements
5. The resistance was 59.76 ohms at 100 minutes, and the interval of the slurry initiation point had been reached. Therefore, the initial setting point of the slurry in the working environment with the designed grouting pressure and confining pressure can be determined to be 100 minutes.
Test data sheet
Note:
1. the experiment takes the resistance as a characteristic value, and indirectly reflects the change condition of various parameters (such as water content, strength, density and the like) of the slurry.
2. Before the experiment, the characteristic value of the monitored parameter is calibrated (under the normal-pressure soaking state), and the characteristic value is used as a judgment basis under the set state.
3. The resistance value measured by the experiment only indirectly reflects the change state of the slurry and cannot accurately reflect the actual resistance of the slurry, and if the resistance value of the slurry in each state needs to be measured, professional tests are required.
Those skilled in the art will appreciate that some or all of the above-described aspects may be practiced without these specific details.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. High pressure curtain slip casting consolidation simulation experiment device, its characterized in that: comprises an enclosing ballast cabin, a slurry experiment cabin, a grouting pump, a constant pressure drainage device and a consolidation parameter monitoring device; the slurry experiment chamber is arranged in the confining pressure chamber, water is filled in the confining pressure chamber and the real underground water pressure is simulated, and the cavity of the confining pressure chamber is connected with the constant pressure drainage device; the grouting pump is communicated with the slurry experiment cabin through a grouting pipe, the grouting pump injects slurry with stable pressure into the slurry experiment cabin, the outer wall of the slurry experiment cabin is provided with filter cloth, and the slurry experiment cabin is connected with the consolidation parameter monitoring device;
the structure of the slurry experiment cabin comprises: a test chamber base (19), a test chamber top base (26), an upper conical pull rod pipe (20), a lower conical pull rod pipe (27), an observation electrode (25) and a drain cylinder (22) with a bottom; the test chamber base (19) and the test chamber top seat (26) are both provided with central stepped holes, the test chamber base (19) and the test chamber top seat (26) are both connected with a drainage tube (22) with a bottom through threads, the bottom of the drainage tube (22) with the bottom is arranged on one side of the test chamber base (19), an upper conical pull rod tube (20) and a lower conical pull rod tube (27) are respectively fixed and communicated with the test chamber base (19) and the test chamber top seat (26) through nuts, the tube surface and the bottom surface of the drainage tube (22) with the bottom are provided with a plurality of drainage holes, and the inner wall of the drainage holes is provided with filter cloth (37); 2 testing electrodes with insulating layers, which are close to a test chamber base (19), are connected with an external consolidation parameter monitoring device through a lower conical pull rod pipe (27), and an upper conical pull rod pipe (20) is communicated with a grouting pipe.
2. The high-pressure curtain grouting consolidation simulation experiment device of claim 1, characterized in that: the drainage tube (22) with the bottom is provided with an axial cutting seam which divides the drainage tube (22) with the bottom into two halves.
3. The high-pressure curtain grouting consolidation simulation experiment device according to claim 1 or 2, characterized in that: the consolidation parameter monitoring device is a resistance tester; the experiment cabin is connected with the resistance tester; the pressure control of the resistance tester is connected with the data acquisition system.
4. The experimental method of the high-pressure curtain grouting consolidation simulation experimental device as claimed in claim 1, 2 or 3, characterized in that: firstly establishing a simulated confining pressure chamber which is filled with water and can simulate real underground water pressure, arranging a slurry experiment chamber which simulates real grouting and the pressure thereof in the confining pressure chamber, and connecting the slurry experiment chamber with a consolidation parameter monitoring device so as to detect the slurry state change under different drainage conditions or set conditions and carry out real-time monitoring to obtain each slurry consolidation parameter.
5. The experimental method of the high-pressure curtain grouting consolidation simulation experimental device of claim 4, wherein: the consolidation parameter monitoring device adopts a resistance detection method to identify various state characteristic values of different types of slurry, and determines physical and mechanical parameters of the test block corresponding to the curve and the resistance value according to the test of the test block formed at the moment corresponding to the resistance value curve form and the resistance value; and various parameters represented by the curve are enriched by adopting interpolation and extrapolation methods.
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| CN114922174B (en) * | 2022-06-02 | 2023-12-29 | 包钢勘察测绘研究院 | Prestressed anchor cable for detecting underwater condensation hardening process of anchoring body and detection method |
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