A grouting test device for simulating actual field stress and geological environment foundation

Abstract

The application discloses a grouting test device simulating actual field stress and geological environment foundation, belongs to the technical field of experimental equipment, and comprises a bottom shell, a support frame, a linear guide rail, an electric push rod, a box body, an upper pressing plate, a side pressing plate, a pressure sensor, a humidity sensor, a valve, humidity detection circuit and pressure detection circuit; the bottom shell, the support frame, the linear guide rail, the electric push rod, the box body, the upper pressing plate, the side pressing plate, the pressure sensor, the humidity sensor and the valve are installed together, the humidity detection circuit and the pressure detection circuit are installed in an element box and are electrically connected. The application can set the grouting pressure of rock block samples in the box body, can set the grouting humidity data of the rock block samples in the box body under the joint action of the humidity sensor and the humidity prompting circuit, can simulate the grouting effect of rock blocks in the related area under the set pressure and humidity environment, the obtained data is closer to the field, is real and effective, and plays a favorable data support for field construction.

Description

Technical Field

[0001] This invention relates to the field of experimental equipment technology, and in particular to a grouting test device for simulating actual on-site ground stress and geological environment. Background Technology

[0002] With the rapid development of transportation infrastructure, countless tunnel projects (including underground tunnels for subways, highways, and railways, as well as underpasses in mountains) are being constructed. In actual construction, the geological conditions (including surrounding rock pressure) and water content vary from area to area. To mitigate the adverse effects of the geological conditions on construction, tunnel construction often involves injecting cement grout into the relevant areas for hardening (the grouting pump, under pressure, pumps the cement grout into the relevant area through pipelines). Specifically, after the cement grout is injected into the relevant area, it solidifies evenly with the surrounding rock, providing good strength reinforcement and reducing the safety risks such as collapses caused by insufficient strength in the relevant area.

[0003] Before construction, to achieve good grouting results for fixed rock blocks, technicians typically sample rock blocks from relevant areas on-site. In a laboratory, these samples are placed in experimental equipment, and cement grout is injected in different proportions to determine the optimal grouting volume and mix ratio for each area. Actual construction then follows the laboratory data, injecting and hardening the grout according to the specified values. While this method meets experimental needs to some extent, it suffers from the following technical drawbacks due to limitations in equipment and methods: First, it cannot simulate the surrounding rock pressure experienced on-site. In reality, the surrounding rock pressure affects grouting, setting, and solidification, so the experimental data may not accurately reflect the actual geological conditions, potentially negatively impacting the quality of the grouting. Second, it cannot simulate the moisture content of the rock blocks on-site. If the rock blocks are not tested promptly after being transported to the laboratory and dried, the required water content of the cement grout differs between dried and wet rock blocks. For example, if the rock mass has a relatively high moisture content, and the cement grout injected through the grouting pump also has a relatively high water content, it will cause voids to appear inside the rock mass after grouting, failing to achieve a good strengthening and fixing effect. In summary, it is very necessary to provide a device that can simulate the pressure and moisture data of the rock mass on site as closely as possible for grouting experiments. Summary of the Invention

[0004] In order to overcome the shortcomings of existing rock block reinforcement grouting test equipment, which have structural limitations as described in the background, this invention provides a grouting test device that, under the combined action of relevant mechanisms, can simulate the grouting effect of rock blocks in a relevant area under set pressure and humidity conditions. The data obtained is closer to the actual site conditions and is more realistic and effective, providing favorable data support for on-site construction.

[0005] The objective of this invention is achieved through the following technical solution: a grouting test device simulating actual in-situ stress and geological environment, comprising a bottom shell, a support frame, a linear guide rail, electric push rods, a housing, an upper pressure plate, side pressure plates, a pressure sensor, a humidity sensor, and valves, and also including a humidity detection circuit and a pressure detection circuit; the upper and lower ends and one side end of the housing are open structures, and detachable transparent observation plates are respectively installed at the front and rear ends of the housing; the lower ends of both sides of the support frame are respectively installed on both sides of the upper end of the bottom shell; the linear guide rail has at least two sliding blocks, and the electric push rods have multiple sets; the linear guide rail is installed inside one side of the support frame, with the upper parts of two sets of electric push rods respectively installed on both sides of the upper end of the support frame, and the other two sets of electric push rods respectively installed on the sides of the two sliding blocks of the linear guide rail; the upper outer side of the upper pressure plate is respectively connected to the lower ends of two sets of electric push rods. The ends are installed together, with the upper pressure plate located at the upper end of the box body; the side pressure plate includes a guide plate and a moving plate. The guide plate has a hollow structure, and the moving plate slides inside the guide plate. The outer ends of the guide plate and the moving plate are respectively installed together with the other sides of the other two sets of electric push rods; the guide plate and the moving plate are located at one end of the box body; the front and rear observation plates of the box body are respectively equipped with connecting pipes. One connecting pipe at the rear end is connected to one end of a valve, and the other end of the valve is connected to a tap water pipe. One connecting pipe at the front end is connected to the grout outlet pipe of the grouting pump. An overflow pipe is installed at the lower end of one observation plate at the front end. The probes of the pressure sensor and the humidity sensor are respectively installed on both sides of the overflow pipe; the humidity detection circuit and the pressure detection circuit are installed in the component box, and the signal output terminals of the pressure sensor and the humidity sensor are electrically connected to the signal input terminals of the pressure detection circuit and the humidity detection circuit, respectively.

[0006] Preferably, the front-to-back width of the upper pressure plate, guide plate, and moving plate is smaller than the front-to-back width of the box body.

[0007] Preferably, the inner side of the guide plate has a rubber pad around its perimeter, and the moving plate and the rubber pad are in elastic contact.

[0008] Preferably, the electric actuator can also be replaced by either a hydraulic cylinder or a pneumatic cylinder.

[0009] Preferably, the observation plate is a high-strength acrylic plate.

[0010] Preferably, a drain pipe is installed at the lower front end of the bottom shell.

[0011] Preferably, the front-to-back width of the upper section of the movable plate is smaller than the front-to-back width of the inner side of the guide plate.

[0012] Preferably, the right end of the movable plate is located at the upper end of the guide plate.

[0013] Preferably, the humidity detection circuit includes an adjustable resistor RP1, resistors R1 and R2, a transistor Q1, and an alarm lamp B1; the first fixed terminal and the movable terminal of the adjustable resistor RP1 are connected to the output terminal of the humidity sensor A3, and the second fixed terminal of the adjustable resistor RP1 is connected to the first terminals of resistors R1 and R2; the second terminal of resistor R1 is connected to the emitter of transistor Q1; the second terminal of resistor R2 is connected to the base of transistor Q1; the collector of transistor Q1 is connected to the negative power input terminal of alarm lamp B1; and the positive power input terminal of alarm lamp B1 is connected to a power supply.

[0014] Preferably, the pressure detection circuit includes an adjustable resistor RP2, resistors R3 and R4, a transistor Q2, and an alarm lamp B2; the first fixed end and the movable end of the adjustable resistor RP2 are connected to the output end of the pressure sensor A2, and the second fixed end of the adjustable resistor RP2 is connected to the first ends of resistors R3 and R4; the second end of the resistor R3 is connected to the emitter of the transistor Q2; the second end of the resistor R4 is connected to the base of the transistor Q2; the collector of the transistor Q2 is connected to the negative power input terminal of the alarm lamp B2; and the positive power input terminal of the alarm lamp B2 is connected to a power supply.

[0015] The beneficial effects of this invention are:

[0016] 1) This invention is based on on-site detection of rock pressure and humidity data. In actual experiments, with the combined action of four sets of electric push rods, an upper pressure plate, side pressure plates, pressure sensors, and pressure detection circuits, the grouting pressure of the rock sample inside the chamber can be set. With the combined action of humidity sensors and humidity indication circuits, the grouting humidity data of the rock sample inside the chamber can be set. Thus, by simulating the grouting effect of rock blocks in relevant areas under set pressure and humidity conditions, the obtained data is closer to the actual situation and more accurate and effective, providing valuable data support for on-site construction. In summary, this invention has good application prospects. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall three-dimensional structure of the grouting test device for simulating actual on-site ground stress and geological environment.

[0018] Figure 2 This is a schematic diagram of a humidity detection circuit and a pressure detection circuit. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] See Figure 1 Figure 2 This invention provides a technical solution: a grouting test device for simulating actual on-site ground stress and geological environment, comprising a bottom shell 1, a support frame 2, a linear guide rail 3 (which guides the downward movement of the side pressure plate), electric push rods M1 and M2, a housing 4, an upper pressure plate 8, side pressure plates, a power module A1, a pressure sensor A2, a humidity sensor A3, a valve 5, and power switches S1 and S2. It also includes a humidity detection circuit 6 and a pressure detection circuit 7. The housing 4 has an "U"-shaped structure, and its upper, lower, and right ends are open. A detachable transparent [device / device] is bolted to the front and rear ends of the housing 4. The observation plate 41, the lower ends of the "Π"-shaped support frame 2 are welded to the upper ends of the middle part of the bottom shell 1 respectively; the linear guide rail has two sliding blocks, and there are four sets of electric push rods. The linear guide rail 3 is fixedly installed inside the right side of the support frame 2. The cylinders of two sets of electric push rods M1 are vertically distributed and installed on the upper ends of the support frame 2 respectively. The cylinders of the other two sets of electric push rods M2 are horizontally distributed and installed on the left ends of the two sliding blocks of the linear guide rail respectively; the outer middle parts of the upper ends of the upper two sides of the upper pressure plate 8 are fixedly installed together with the lower ends of the movable columns of two sets of electric push rods M1 respectively. The upper pressure plate 8 is located at the upper end of the box 4; the side pressure plate includes guide The guide plate 91 and the movable plate 92 are hollow structures. The movable plate 92 is vertically slidably fitted inside the guide plate 91. The right outer ends of the guide plate 91 and the movable plate 92 are fixedly installed together with the left side of the movable column of the other two sets of electric push rods M2. The guide plate 91 and the movable plate 92 are located at the right end inside the housing 4. A connecting pipe 42 that communicates with the inside of the housing is welded to the middle of the front and rear observation plates of the front and rear observation plates, respectively. The upper part of the rear connecting pipe 42 is threaded to the lower end of the valve 5. The upper end of the valve 5 is connected to the water pipe through a rubber hose. The front connecting pipe 42... The front end and the grouting pump (not shown in the figure) are connected by a high-pressure hose. An overflow pipe 43 that communicates with the box body is welded to the lower middle of the front observation plate 41. There is a threaded hole on the left and right sides of the lower middle of the front observation plate 41. The probes of pressure sensor A2 and humidity sensor A3 are screwed into the two threaded holes respectively. The pressure sensor A2 and humidity sensor A3 are installed on the lower front outer side of the front observation plate 41. The power module A1, power switches S1 and S2, humidity detection circuit 6 and pressure detection circuit 7 are installed in the component box 9 outside the front right side of the bottom shell.

[0021] Figure 1 , 2 As shown, the front-to-back width of the upper pressure plate 8, guide plate 91, and moving plate 92 is smaller than the front-to-back width of the inner casing 4. Rubber pads are adhered around the inner edge of the guide plate 91, and the moving plate 92 is in elastic contact with the rubber pads (the guide plate 91 will not descend without significant downward force). The electric push rods M1 and M2 can also be replaced by either a hydraulic cylinder or a pneumatic cylinder. The observation plate 41 is made of high-strength acrylic sheet. A drain pipe 101, communicating with the interior, is welded to the center of the lower front end of the bottom shell (to drain excess water overflowing from the casing via the overflow pipe 43). A sewage hose is installed at the front end of the drain pipe, with its front end located above the wastewater pool. The front-to-back width of the upper section of the moving plate 92 is slightly smaller than the front-to-back width of the inner side of the guide plate 91. The right side of the upper pressure plate 8 is located above the guide plate 91. The humidity detection circuit includes an adjustable resistor RP1, resistors R1 and R2, a transistor Q1, and an alarm lamp B1, all connected via circuit board wiring. One end of the adjustable resistor RP1 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 is connected to the base of the transistor Q1. The other end of the first resistor R1 is connected to the emitter of the transistor Q1. The collector of the transistor Q1 is connected to the negative power input terminal of the alarm lamp B1. The pressure detection circuit includes an adjustable resistor RP2, resistors R3 and R4, a transistor Q2, and an alarm lamp B2, all connected via circuit board wiring. One end of the adjustable resistor RP2 is connected to one end of the first resistor R3 and one end of the second resistor R4. The other end of the second resistor R4 is connected to the base of the transistor Q2. The other end of the first resistor R2 is connected to the emitter of the transistor Q2. The collector of the transistor Q2 is connected to the negative power input terminal of the alarm lamp B2.

[0022] Figure 1 , 2 As shown, the power input terminals 1 and 2 of power module A1 are connected to the two poles of the 220V AC power supply via wires. The power output terminals 3 and 4 of power module A1 are connected to the power input terminals of the humidity detection circuit, the positive power input terminal of alarm lamp B1, and the emitter of transistor Q1; the power input terminals of the pressure detection circuit, the positive power input terminal of alarm lamp B2, and the emitter of transistor Q2; the power input terminals 1 and 2 of pressure sensor A2; the power input terminals 1 and 2 of humidity sensor A3; and the power input terminals 1 and 2 of power switches S1 and S2 via wires. The power output terminals 3 and 4, and 5 and 6 of the two power switches S1 and S2 are connected to the positive and negative power input terminals of two sets of electric actuators M1 and the other two sets of electric actuators M2 via wires. The signal output terminal 3 of pressure sensor A2 and humidity sensor A3 is connected to the other end of the adjustable resistor RP2 of the pressure detection circuit and the other end of the adjustable resistor RP1 of the humidity detection circuit via wires.

[0023] Figure 1 , 2As shown, before using this invention, the staff first measured the pressure and humidity data of the rock blocks in the area to be grouted using other pressure and humidity sensors (and brought back some rock block samples to the laboratory for experimental use). After the 220V power supply enters the power input terminal of the power module A1, the 24V DC power output from pins 3 and 4 of the power module A1 enters the power input terminals of the power switches S1 and S2, as well as the pressure sensor, pressure detection circuit, humidity sensor, and humidity indication circuit. (Before the experiment, a layer of release oil was applied to the box, the inner part, the lower end of the upper pressure plate 8, the left side of the side pressure plate, and the upper end of the bottom shell to facilitate the demolding of the test samples. In this way, this invention can be used repeatedly.) The specific experimental procedure of this invention is as follows: (1): The experimenter moves the handle of the power switch S1 to the left for a period of time. Pins 1 and 2 and pins 3 and 4 of the power switch S1 are connected respectively. In this way, the movable column of the two sets of electric push rods M1 (the positive and negative power input terminals are energized) drives the upper pressure plate 8 to move upward. The lower end of the upper pressure plate 8 and the upper end of the box 4 are spaced apart. Then the experimenter puts the field sample rock block to be tested into the box from the upper end of the box 4. (2) When the experimenter opens valve 5, tap water will enter the upper part of the box 4, and the humidity of the rocks will gradually increase (the greater the degree of valve opening, the faster the water flow into the box, and vice versa; if the humidity of the rocks reaches the required level, water need not be added to the rocks); when water does not effectively enter the lower part of the box 4 and the humidity of the rocks does not reach the humidity value set by the adjustable resistor RP1 (that is, the humidity of the rocks on site), the voltage signal output by pin 3 of the humidity sensor A3 is relatively small. This voltage signal is divided by the adjustable resistor RP1 and resistor R1, and the voltage is reduced and the current is limited by resistor R2 before entering the three electrodes. When the base voltage of transistor Q1 is below 0.7V, transistor Q1 will not conduct, and alarm light B1 will not illuminate, indicating that the humidity of the rock block is insufficient. When water effectively enters the lower part of the chamber 4 and the humidity of the rock block reaches the humidity value set by adjustable resistor RP1, the voltage signal output by pin 3 of humidity sensor A3 is relatively large. This voltage signal is divided by adjustable resistor RP1 and resistor R1, and the voltage is reduced and current limited by resistor R2 before entering the base voltage of transistor Q1, which is above 0.7V. Transistor Q1 will then conduct, and alarm light B1 will illuminate, indicating that the humidity of the rock block has reached the required experimental data. The experimenter can then close the valve (excess water flows out to the sewage tank through overflow pipe 43).(3) In the experiment, the handle of the power switch S1 is turned to the right for a period of time, and pins 1 and 2 and pins 5 and 6 of the power switch S1 are connected respectively. In this way, the movable columns of the two sets of electric push rods M1 (the negative and positive power input terminals are energized) drive the upper pressure plate 8 to move downward. The lower end of the upper pressure plate 8 gradually enters the box 4 from top to bottom, compressing the rock sample vertically (since the upper end of the moving plate 92 slides inside the guide plate 91, the guide plate 91 will be compressed synchronously when the upper pressure plate 8 moves downward, ensuring that the rock can be compressed synchronously vertically and horizontally). At the same time as turning on the power switch S1, the handle of the power switch S2 is turned to the right for a period of time, and pins 1 and 2 and pins 5 and 6 of the power switch S2 are connected respectively. In this way, the movable columns of the two sets of electric push rods M2 (the negative and positive power input terminals are energized) drive the guide plate 91 and the moving plate 92 to move to the left end of the box, compressing the rock sample horizontally. The synchronous compression vertically and horizontally can improve the compression speed. When the rock mass inside chamber 4 is not compressed to the pressure value set by adjustable resistor RP2 (i.e., the pressure data of the rock mass on site), the voltage signal output by pin 3 of pressure sensor A2 is relatively small. This voltage signal is divided by adjustable resistor RP2 and resistor R2, and then reduced by resistor R3 to limit the current to the base of transistor Q2, resulting in a voltage below 0.7V. Transistor Q2 will not conduct, and alarm light B2 will not light up, indicating that the rock mass is not compressed enough. When the rock mass inside chamber 4 is compressed to the pressure value set by adjustable resistor RP2, the voltage signal output by pin 3 of pressure sensor A2 is relatively large. This voltage signal is divided by adjustable resistor RP2 and resistor R3, and then reduced by resistor R4 to limit the current to the base of transistor Q2, resulting in a voltage above 0.7V. Transistor Q2 will conduct, and the collector will output a low level, causing alarm light B1 to light up, indicating that the rock mass has been compressed to the required experimental data. The experimenter can then turn off power switches S1 and S2. (4) The staff turns on the power switch of the grouting pump. The grouting pump injects cement slurry into the box 4 through a connecting pipe 42 at the front end (the experimenter observes the grouting situation through the transparent observation plate 41. After the cement slurry fills the box, the grouting pump power switch is turned off to stop the grouting). At the same time, the staff removes the pressure sensor and humidity sensor (to prevent the cement slurry from solidifying in front of the probe of the pressure sensor and humidity sensor after drying. A rubber stopper can be inserted into the two wire holes at the moment to prevent the cement slurry from overflowing).(5) After the staff observes that the rock block and cement slurry have dried, they remove the front and rear observation plates 41, and then turn the handle of the power switch S1 to the left for a period of time. The 1st and 2nd pins and the 3rd and 4th pins of the power switch S1 are connected respectively. In this way, the movable columns of the two sets of electric push rods M1 (the positive and negative power input terminals are energized) drive the upper pressure plate 8 to move upward. The lower end of the upper pressure plate 8 is separated from the upper end of the solidified rock block by a certain distance. Then, turn the handle of the power switch S2 to the left for a period of time. The 1st and 2nd pins and the 5th and 6th pins of the power switch S2 are connected respectively. In this way, the movable columns of the two sets of electric push rods M2 (the positive and negative power input terminals are energized) drive the side pressure plate to move to the right. The left end of the side pressure plate is separated from the right end of the solidified rock block by a certain distance. Then, the staff manually or with equipment pushes the solidified rock block out of the box. (6) Laboratory equipment is used to test the strength of the solidified rock blocks. Once the solidified rock blocks reach the set strength (if the strength is insufficient, it means that the cement slurry content is too low, or the grouting pressure is insufficient, or the cement slurry diffusion area is insufficient, etc., and the experiment needs to be repeated), the experimenters can intuitively obtain the amount of cement slurry to be injected, the cement slurry injection pressure and the cement slurry water content required for the corresponding area on site by calculating the corresponding humidity, the corresponding pressure, the corresponding amount of rock blocks and the amount of cement slurry output by the grouting pump (including data such as cement slurry water content and grouting pressure), so as to ensure that the on-site construction can effectively inject the appropriate amount of cement slurry (including data such as pressure and water content) into the corresponding area.

[0024] Figure 1 , 2 As shown above, based on the rock pressure and humidity data detected on-site, this invention, in actual experiments, can set the grouting pressure of the rock sample inside the chamber under the combined action of four sets of electric push rods, upper pressure plate, side pressure plate, pressure sensor, and pressure detection circuit. Under the combined action of humidity sensor and humidity indication circuit, it can set the grouting humidity data of the rock sample inside the chamber. In this way, because the grouting effect of the rock in the relevant area can be simulated under the set pressure and humidity environment, the obtained data is closer to the real and effective field conditions, providing favorable data support for on-site construction. Figure 2In the diagram, power module A1 is a finished product of AC 220V to DC 24V power module; resistors R1, R2, R3, and R4 have resistance values ​​of 10K, 47K, 10K, and 47K respectively; pressure sensor A2 is model ZNLBM-IIX; humidity sensor A3 is model KS-SHTE; alarm lights B1 and B2 are flashing alarm lights; adjustable resistors RP1 and RP2 have a resistance value of 470K (adjusted to 25.3K and 13.6K respectively). The tester adjusted the resistance values ​​of adjustable resistors RP2 and RP1... When the resistance values ​​of adjustable resistors RP2 and RP1 are adjusted to a relatively large value, the voltage drop between them and resistors R3 and R1 is relatively large. In this way, when the pressure and humidity of the tested rock are relatively high, transistors Q2 and Q1 will conduct. That is, the pressure and humidity threshold values ​​of this invention are set to a relatively large value. When the resistance values ​​of adjustable resistors RP2 and RP1 are adjusted to a relatively small value, the voltage drop between them and resistors R3 and R1 is relatively small. In this way, when the pressure and humidity of the tested rock are relatively low, transistors Q2 and Q1 will conduct. That is, the pressure and humidity threshold values ​​of this invention are set to a relatively small value.

[0025] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A grouting test device for simulating actual in-situ ground stress and geological environment, comprising a bottom shell, a support frame, a linear guide rail, an electric push rod, a housing, an upper pressure plate, side pressure plates, a pressure sensor, a humidity sensor, and valves, characterized in that: It also features humidity and pressure detection circuits; the upper, lower, and one side of the housing are open structures, with detachable transparent observation plates installed at the front and rear ends of the housing, and the lower ends of the support frame installed on the upper sides of the bottom shell; the linear guide rail has at least two sliding blocks, and multiple sets of electric push rods are provided. The linear guide rail is installed inside one side of the support frame, with the upper parts of two sets of electric push rods installed on the upper sides of the support frame, and the other two sets of electric push rods installed on the sides of the two sliding blocks of the linear guide rail; the upper outer side of the upper pressure plate is installed together with the lower ends of two sets of electric push rods, and the upper pressure plate is located at the upper end of the housing; the side pressure plate includes a guide plate and a moving plate, the guide plate being a hollow structure, and the moving plate sliding... The moving sleeve is installed inside the guide plate. The outer ends of the guide plate and the moving plate are respectively installed together with the other two sets of electric push rods. The guide plate and the moving plate are located on one side of the box body. The front and rear observation plates of the box body are respectively equipped with connecting pipes. One of the rear connecting pipes is connected to one end of the valve, and the other end of the valve is connected to the tap water pipe. One of the front connecting pipes is connected to the grout outlet pipe of the grouting pump. An overflow pipe is installed at the lower end of one of the front observation plates. The probes of the pressure sensor and the humidity sensor are respectively installed on both sides of the overflow pipe. The humidity detection circuit and the pressure detection circuit are installed in the component box. The signal output terminals of the pressure sensor and the humidity sensor are electrically connected to the signal input terminals of the pressure detection circuit and the humidity detection circuit, respectively. The humidity detection circuit includes an adjustable resistor RP1, resistors R1 and R2, a transistor Q1, and an alarm light B1. The first fixed and movable terminals of the adjustable resistor RP1 are connected to the output terminal of the humidity sensor A3, and the second fixed terminal of the adjustable resistor RP1 is connected to the first terminals of resistors R1 and R2. The second terminal of resistor R1 is connected to the emitter of transistor Q1, and the second terminal of resistor R2 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to the negative power input terminal of alarm light B1, and the positive power input terminal of alarm light B1 is connected to a power supply. The pressure detection circuit includes an adjustable resistor RP2, resistor R3, resistor R4, transistor Q2, and alarm lamp B2. The first fixed and movable ends of the adjustable resistor RP2 are connected to the output of pressure sensor A2, and the second fixed end of the adjustable resistor RP2 is connected to the first ends of resistors R3 and R4. The second end of resistor R3 is connected to the emitter of transistor Q2. The second end of resistor R4 is connected to the base of transistor Q2. The collector of transistor Q2 is connected to the negative power input terminal of alarm lamp B2. The positive power input terminal of alarm lamp B2 is connected to a power supply.

2. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: The front-to-back width of the upper pressure plate, guide plate, and moving plate is smaller than the front-to-back width of the box body.

3. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: The guide plate has rubber pads around its inner edge, and the moving plate and the rubber pads are in elastic contact.

4. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: Use either a hydraulic cylinder or a pneumatic cylinder to replace the electric actuator.

5. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: The observation board is a high-strength acrylic sheet.

6. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: A drain pipe is installed at the lower front end of the bottom shell.

7. The grouting test device for simulating actual in-situ stress and geological environment as described in claim 1, characterized in that: The front-to-back width of the upper section of the movable plate is smaller than the front-to-back width of the inner side of the guide plate.

8. The grouting test device for simulating actual in-situ ground stress and geological environment as described in claim 1, characterized in that: The right end of the movable plate is located at the top of the guide plate.

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