Grouting test device for simulating on-site actual ground stress and geological environment foundation

Abstract

The invention discloses a grouting test device for simulating on-site actual ground stress and geological environment foundation, which 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, a humidity detection circuit and a pressure detection circuit, the bottom shell, the supporting 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, and the humidity detection circuit and the pressure detection circuit are installed in the element box and electrically connected. The grouting pressure of the rock block sample in the box body can be set, the grouting humidity data of the rock block sample in the box body can be set under the combined action of the humidity sensor and the humidity prompt circuit, and the rock block grouting effect of a related area can be simulated under the set pressure and humidity environment, so that the obtained data is closer to the field and is real and effective; and favorable data support is provided for on-site construction.

Description

Technical Field

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

[0002] With the rapid advancement of transportation, countless tunnel projects (including underground tunnels for subways, highways, and railways, as well as tunnels under mountains) are being constructed. In actual construction, geological conditions (including surrounding rock pressure) and water content vary from region to region. To mitigate the adverse effects of regional geology on construction, tunnel construction often involves the injection of cement slurry for hardening (a grouting pump, under pressure, pumps cement slurry through pipelines and diffuses it into the relevant area). Specifically, once injected, the cement slurry solidifies within the rock mass, providing effective reinforcement and reducing safety risks such as collapse caused by insufficient strength in the area.

[0003] Before construction, to achieve optimal grouting results for rock block fixation, technicians typically sample rock blocks from the relevant on-site area. These blocks are then placed in a laboratory test facility and filled with cement slurry at varying ratios to determine the optimal grouting volume and slurry mix for the specific area. During actual construction, the slurry is then injected and hardened in the relevant construction area based on the laboratory data. While existing methods meet experimental needs to a certain extent, they are limited by the equipment and methods used, and suffer from the following technical drawbacks. First, the experimental data cannot simulate the surrounding rock pressure experienced in the on-site area. In reality, surrounding rock pressure in the relevant area also affects grouting, setting, and solidification. Therefore, the experimental data obtained cannot be truly based on the on-site geological conditions, potentially adversely affecting the quality of the actual grouting work. Second, the experimental data cannot simulate the water content of the on-site rock blocks. If the on-site rock blocks are not tested promptly after being transported to the laboratory and the rock blocks are dried, the water content requirements of the cement slurry will differ from those of the wet rock blocks. For example, if the rock mass is relatively wet, and the water content of the cement slurry injected by the grouting pump is also relatively high, then cavities will appear inside the rock mass after grouting, and a good strengthening and fixing effect will not be achieved. In summary, it is very necessary to provide a device that can simulate the pressure and humidity data of the rock mass in the field as much as possible for grouting experiments. Summary of the Invention

[0004] In order to overcome the disadvantages of the existing rock block reinforcement grouting experimental equipment due to structural limitations as described in the background, the present invention provides a grouting test device that can simulate the grouting effect of rock blocks in a relevant area under a set pressure and humidity environment with the joint action of relevant mechanisms, and the obtained data is closer to the actual situation on site, true and effective, providing favorable data support for on-site construction, which is based on simulating the actual in-situ stress and geological environment.

[0005] The object of the present invention is achieved through the following technical solutions: A grouting test device based on simulating the actual in-situ stress and geological environment includes a bottom shell, a support frame, linear guide rails, electric push rods, a box body, an upper pressure plate, side pressure plates, pressure sensors, humidity sensors, valves, and also has a humidity detection circuit and a pressure detection circuit; The upper and lower ends and one side end of the box body are open structures, and detachable transparent observation plates are respectively installed at the front and rear ends of the box body. The lower ends on both sides of the support frame are respectively installed on both sides of the upper end inside the bottom shell; There are at least two sliding blocks on the linear guide rails, and there are multiple sets of electric push rods. The linear guide rails are installed inside one side of the support frame. The upper parts of two sets of electric push rods are respectively installed on both sides of the upper end inside the support frame, and the other sides of two sets of electric push rods are respectively installed on the side ends of the two sliding blocks of the linear slide rail; The outer sides of the upper ends of the upper pressure plate are respectively installed together with the lower ends of two sets of electric push rods, and the upper pressure plate is located at the upper end inside the box body; The side pressure plates include a guide plate and a moving plate. The guide plate is a hollow structure, and the moving plate is slidably sleeved inside the guide plate. The outer sides of the guide plate and the moving plate and the other sides of two sets of electric push rods are respectively installed together; The guide plate and the moving plate are located at one side end inside the box body; Connecting pipes are respectively installed on the front and rear observation plates of the box body. One connecting pipe at the rear end is connected to one end of the valve, and the other end of the valve is connected to the water supply pipe. One connecting pipe at the front end is connected to the slurry outlet pipe of the grouting pump. An overflow pipe is installed at the lower end of one front observation plate. 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 ends of the pressure sensor and the humidity sensor are respectively electrically connected to the signal input ends of the pressure detection circuit and the humidity detection circuit.

[0006] Preferably, the front and rear widths of the upper pressure plate, the guide plate, and the moving plate are smaller than the front and rear widths inside the box body.

[0007] Preferably, there are rubber pads around the inner side end of the guide plate, and the moving plate is in elastic contact with the rubber pads.

[0008] Preferably, one of the oil cylinder or the air cylinder can also be used to replace the electric push rod.

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

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

[0011] Preferably, the front - rear width of one end at the upper part of the moving plate is smaller than the front - rear width inside the guide plate.

[0012] Preferably, the right - hand 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, a resistor R1, a resistor R2, a triode Q1, and an alarm lamp B1; the first fixed end and the movable end of the adjustable resistor RP1 are connected to the output end of the humidity sensor A3, and the second fixed end of the adjustable resistor RP1 is connected to the first ends of the resistor R1 and the resistor R2; the second end of the resistor R1 is connected to the emitter of the triode Q1; the second end of the resistor R2 is connected to the base of the triode Q1; the collector of the triode Q1 is connected to the negative - power - input end of the alarm lamp B1; the positive - power - input end of the alarm lamp B1 is connected to the power supply.

[0014] Preferably, the pressure detection circuit includes an adjustable resistor RP2, a resistor R3, a resistor R4, a triode 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 the resistor R3 and the resistor R4; the second end of the resistor R3 is connected to the emitter of the triode Q2; the second end of the resistor R4 is connected to the base of the triode Q2; the collector of the triode Q2 is connected to the negative - power - input end of the alarm lamp B2; the positive - power - input end of the alarm lamp B2 is connected to the power supply.

[0015] The beneficial effects of the present invention are as follows: 1) Based on the pressure and humidity data of rock blocks detected on - site, during actual experiments, under the combined action of four sets of electric push rods, the upper pressure plate, the side pressure plates, the pressure sensors, and the pressure detection circuit, the grouting pressure of the rock - block samples in the box can be set. Under the combined action of the humidity sensor and the humidity prompt circuit, the grouting humidity data of the rock - block samples in the box can be set. In this way, since the grouting effect of rock blocks in the relevant area can be simulated under the set pressure and humidity environment, the obtained data is closer to the on - site situation, true and effective, providing favorable data support for on - site construction. In summary, the present invention has a good application prospect. Description of the Drawings

[0016] Figure 1 It is a schematic three - dimensional overall structure diagram of a grouting test device based on simulating the actual in - situ stress and geological environment. Figure 2 It is a schematic diagram of the humidity detection circuit and the pressure detection circuit principle. Detailed Embodiments

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0018] Referring to Figure 1 Figure 2 the present invention provides a technical solution: a grouting test device for simulating the actual in-situ stress and geological environment foundation, including a bottom shell 1, a support frame 2, linear guide rails 3 (which can guide the downward movement of the side pressing plates), electric push rods M1 and M2, a box body 4, an upper pressing plate 8, side pressing plates, a power supply module A1, a pressure sensor A2, a humidity sensor A3, valves 5, power switches S1 and S2, and also having a humidity detection circuit 6 and a pressure detection circuit 7; the box body 4 is in a "mouth" shape structure, and the upper and lower ends and the right end of the box body 4 are open structures. Removable transparent observation plates 41 are respectively installed on the front and rear ends of the box body 4 through bolts. The lower ends on both sides of the "Π"-shaped support frame 2 are respectively welded to the upper sides of the middle parts of the bottom shell 1; the linear guide rails have two sliding blocks, and there are four sets of electric push rods. The linear guide rails 3 are 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 sides of the inner upper parts 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 slide rails respectively; the outer middle parts on both sides of the upper end of the upper pressing plate 8 are respectively fixedly installed together with the lower ends of the movable columns of two sets of electric push rods M1. The upper pressing plate 8 is located inside the upper end of the box body 4; the side pressing plates include a guide plate 91 and a moving plate 92. The guide plate 91 is a hollow structure. The moving plate 92 is vertically slidably sleeved inside the guide plate 91. The right outer ends of the guide plate 91 and the moving plate 92 are respectively fixedly installed together with the left sides of the movable columns of the other two sets of electric push rods M2; the guide plate 91 and the moving plate 92 are located inside the right end of the box body 4; a connecting pipe 42 communicating with the inside of the box body is respectively welded to the front middle part of one observation plate at the front end of the box body 4 and the upper middle part of one observation plate at the rear end. The upper part of the connecting pipe 42 at the rear end is threadedly connected to the lower end of the valve 5. The upper end of the valve 5 is connected to the water supply pipe through a rubber hose. The front side end of the connecting pipe 42 at the front end is connected to the slurry outlet pipe of a grouting pump (not shown in the figure) through a high-pressure hose. A water overflow pipe 43 communicating with the inside of the box body is welded to the lower middle part of the front observation plate 41. There are respectively a threaded hole on the left and right side ends of the lower middle part of the front observation plate 41. The probes of the pressure sensor A2 and the humidity sensor A3 are respectively screwed into the two threaded holes to install the pressure sensor A2 and the humidity sensor A3 on the lower outer side of the front observation plate 41; the power supply module A1, the power switches S1 and S2, the humidity detection circuit 6, and the pressure detection circuit 7 are installed in the component box 9 outside the front right end of the bottom shell.

[0019] Figure 1 , 2 As shown in 2 , the front and rear widths of the upper pressing plate 8, the guide plate 91, and the moving plate 92 are smaller than the front and rear widths inside the box body 4. A rubber pad is bonded around the inner end of the guide plate 91, and the moving plate 92 is in elastic contact with the rubber pad (without a large downward acting force, the guide plate 91 will not drop in height). The electric push rods M1 and M2 can also be replaced by one of an oil cylinder or a cylinder. The observation plate 41 is a high-strength acrylic plate. A drain pipe 101 that communicates with its interior is welded to the middle of the front lower end of the bottom shell (to drain the excess water overflowing from the overflow pipe 43 in the box body). A sewage hose is installed at the front side end of the drain pipe, and the front side end of the sewage hose is located above the waste water tank. The front and rear width of a section at the upper end of the moving plate 92 is slightly smaller than the front and rear width inside the guide plate 91. The right end of the upper pressing plate 8 is located at the upper end of the guide plate 91. The humidity detection circuit includes a variable resistor RP1, resistors R1 and R2, a triode Q1, and an alarm lamp B1 connected by circuit board wiring. One end of the variable 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 triode Q1. The other end of the first resistor R1 is connected to the emitter of the triode Q1. The collector of the triode Q1 is connected to the negative power input terminal of the alarm lamp B1. The pressure detection circuit includes a variable resistor RP2, resistors R3 and R4, a triode Q2, and an alarm lamp B2 connected by circuit board wiring. One end of the variable 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 triode Q2. The other end of the first resistor R2 is connected to the emitter of the triode Q2. The collector of the triode Q2 is connected to the negative power input terminal of the alarm lamp B2.

[0020] Figure 1 , 2 As shown in 2 , the power input terminals 1 and 2 of the power module A1 are respectively connected to the two poles of the AC 220V power supply through wires. The power output terminals 3 and 4 of the power module A1 are connected to the power input terminal of the humidity detection circuit, the positive power input terminal of the alarm lamp B1, and the emitter of the triode Q1, the power input terminal of the pressure detection circuit, the positive power input terminal of the alarm lamp B2, and the emitter of the triode Q2, the power input terminals 1 and 2 of the pressure sensor A2, the power input terminals 1 and 2 of the humidity sensor A3, and the power input terminals 1 and 2 of the power switches S1 and S2 are respectively connected through wires. The power output terminals 3, 4, 5, and 6 of the two power switches S1 and S2 are respectively connected to the positive and negative and negative and positive power input terminals of two sets of the electric push rods M1 and the other two sets of the electric push rods M2 through wires. The signal output terminal 3 of the pressure sensor A2 and the humidity sensor A3 is connected to the other end of the variable resistor RP2 of the signal input terminal of the pressure detection circuit and the other end of the variable resistor RP1 of the signal input terminal of the humidity detection circuit through wires.

[0021] Figure 1 , 2As shown, before the present invention is used, the staff pre-measures the pressure and humidity data of the rock blocks in the area where grouting is required through other pressure sensors and humidity sensors (and brings back some rock block samples to the laboratory for experiments). After the 220V power supply enters the power input terminal of power supply module A1, the DC 24V power supply output from pins 3 and 4 of power supply module A1 enters the power input terminals of power switches S1, S2, pressure sensors, pressure detectors, humidity sensors, and humidity prompt circuits (before the experiment of the present invention, a layer of release agent is pre-applied on the inside of the box body, the lower end of the upper pressing plate 8, the left end of the side pressing plate, and the upper end of the bottom shell, which is beneficial for the demolding of the test piece in the follow-up. In this way, the present invention can be used repeatedly). The specific experimental process of the present invention is as follows: (1) The experimenter moves the handle of power switch S1 to the left for a period of time. The 1st, 2nd, 3rd, and 4th pins of power switch S1 are respectively connected. 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 pressing plate 8 to move upward. There is a distance between the lower end of the upper pressing plate 8 and the upper end of the box body 4. Then, the experimenter puts the on-site sample rock blocks to be tested into the box body from the upper end of the box body 4. (2) The experimenter opens the valve 5, and tap water will enter the box body 4 from the upper end at the back. The humidity of the rock blocks will gradually increase (the greater the opening degree of the valve core, the relatively faster the water flow rate into the box body, and vice versa. If the humidity of the rock blocks reaches the requirement, water may not be added to the rock blocks). When the water does not effectively enter the lower end of the box body 4 and the humidity of the rock blocks does not reach the humidity value set by the adjustable resistor RP1 (that is, the humidity of the on-site rock blocks), the voltage signal output from pin 3 of 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 and enters the base of triode Q1 below 0.7V. The triode Q1 will not conduct, and the alarm lamp B1 will not emit light, indicating that the humidity of the rock blocks is insufficient. When the water effectively enters the lower end of the box body 4 and the humidity of the rock blocks reaches the humidity value set by the adjustable resistor RP1, the voltage signal output from pin 3 of humidity sensor A3 is relatively large. 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 and enters the base of triode Q1 above 0.7V. The triode Q1 will conduct, and the alarm lamp B1 will emit light, indicating that the humidity of the rock blocks has reached the required experimental data. Then, the experimenter can close the valve (the excess water flows out to the sewage pool through the overflow pipe 43).(3)Experiment: Move the handle of the power switch S1 to the right for a period of time. The 1st, 2nd pins and the 5th, 6th pins of the power switch S1 are respectively connected. In this way, the movable columns of the two sets of electric push rods M1 (the power input terminals of the negative and positive poles are energized) drive the upper pressing plate 8 to move downward. The lower end of the upper pressing plate 8 gradually enters the box body 4 from top to bottom and compresses the rock block sample up and down (since the upper end of the moving plate 92 slides within the guide plate 91, when the upper pressing plate 8 moves downward, the guide plate 91 will be compressed synchronously, ensuring that the rock block can be compressed synchronously up and down and left and right); at the same time as turning on the power switch S1, move the handle of the power switch S2 to the right for a period of time. The 1st, 2nd pins and the 5th, 6th pins of the power switch S2 are respectively connected. In this way, the movable columns of the two sets of electric push rods M2 (the power input terminals of the negative and positive poles are energized) drive the guide plate 91 and the moving plate 92 to move to the left end inside the box body and compress the rock block sample left and right; synchronous up and down and left and right compression can improve the compression speed; when the compression degree of the rock block inside the box body 4 does not reach the pressure value set by the adjustable resistor RP2 (that is, the pressure data of the on-site rock block), the voltage signal output from the 3rd pin of the pressure sensor A2 is relatively small. This voltage signal is divided by the adjustable resistor RP2 and the resistor R2, and the resistor R3 steps down the voltage and limits the current and enters the base of the triode Q2 below 0.7V. The triode Q2 will not conduct, and the alarm lamp B2 does not emit light, indicating that the compression degree of the rock block is insufficient; when the compression degree of the rock block inside the box body 4 reaches the pressure value set by the adjustable resistor RP2, the voltage signal output from the 3rd pin of the pressure sensor A2 is relatively large. This voltage signal is divided by the adjustable resistor RP2 and the resistor R3, and the resistor R4 steps down the voltage and limits the current and enters the base of the triode Q2 above 0.7V. The triode Q2 will conduct and the collector outputs a low level, and then the alarm lamp B1 emits light, indicating that the compression degree of the rock block reaches the experimental required data, and the experimenter can turn off the 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 body 4 through a connecting pipe 42 at the front end (the experimenter can understand the grouting situation through the transparent observation plate 41. After the box body is filled with cement slurry, turn off the power switch of the grouting pump and stop grouting). At the same time, the staff removes the pressure sensor and the humidity sensor (to prevent the cement slurry from condensing in front of the detection heads of the pressure sensor and the humidity sensor after drying. A rubber plug can be temporarily inserted into the two threaded holes to prevent the cement slurry from overflowing).(5) After the staff observed that the rock blocks and the cement slurry had dried, they removed the front and rear observation plates 41, and then toggled 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 were respectively connected. In this way, the movable columns of the two sets of electric push rods M1 (the positive and negative power input terminals were powered on) drove the upper pressing plate 8 to move upward, and there was a spacing between the lower end of the upper pressing plate 8 and the upper end of the solidified rock block; toggled the handle of the power switch S2 to the left for a period of time, and the 1st and 2nd pins and the 5th and 6th pins of the power switch S2 were respectively connected. In this way, the movable columns of the two sets of electric push rods M2 (the positive and negative power input terminals were powered on) drove the side pressing plates to move to the right, and there was a spacing between the left end of the side pressing plate and the right side end of the solidified rock block; then the staff manually or with equipment pushed the solidified rock block out of the box. (6) The laboratory equipment tested the strength of the solidified rock block. On the basis that the solidified rock block reached the set strength (if the strength was insufficient, it meant that the content of the cement slurry was small, or the grouting pressure was insufficient, the diffusion area of the cement slurry was insufficient, etc., and a new experiment was needed). The experimenter could intuitively obtain the amount of cement slurry injection, the injection pressure of the cement slurry, and the water content data of the cement slurry required for the corresponding area on site by calculating the corresponding humidity, corresponding pressure, the amount of the rock block, and the amount of the cement slurry output by the grouting pump (including data such as the water content of the cement slurry and the grouting pressure), so as to ensure that the on-site construction could effectively inject the appropriate amount of cement slurry (including data such as pressure and water content) into the corresponding area.

[0022] Figure 1 、 2 As shown in 2 , through the above, based on the pressure and humidity data of the rock blocks detected on site, during the actual experiment, under the combined action of the four sets of electric push rods, the upper pressing plate, the side pressing plate, the pressure sensor, and the pressure detection circuit, the grouting pressure of the rock block sample in the box can be set. Under the combined action of the humidity sensor and the humidity prompt circuit, the grouting humidity data of the rock block sample in the box can be set. In this way, since the grouting effect of the rock blocks in the relevant area can be simulated under the set pressure and humidity environment, the obtained data is closer to the on-site real and effective data, providing favorable data support for the on-site construction. Figure 2Among them, the power module A1 is a finished product of an AC 220V to DC 24V power module; the resistance values of the resistors R1, R2, R3, and R4 are 10K, 47K, 10K, and 47K respectively; the model of the pressure sensor A2 is ZNLBM-IIX; the model of the humidity sensor A3 is KS-SHTE; the alarm lights B1 and B2 are flashing alarm lights; the resistance values of the adjustable resistors RP1 and RP2 are 470K (adjusted to 25.3K and 13.6K respectively). When the testers adjust the resistance values of the adjustable resistors RP2 and RP1 to be relatively large, the voltage division between them and the resistors R3 and R1 is relatively large. In this way, when the pressure and humidity of the tested rock block are relatively large, the triodes Q2 and Q1 will conduct, that is, the pressure and humidity thresholds of the present invention are set relatively large. When the testers adjust the resistance values of the adjustable resistors RP2 and RP1 to be relatively small, the voltage division between them and the resistors R3 and R1 is relatively small. In this way, when the pressure and humidity of the tested rock block are relatively small, the triodes Q2 and Q1 will conduct, that is, the pressure and humidity thresholds of the present invention are set relatively small.

[0023] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in the relevant field. And the changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A grouting test device based on simulating the actual in-situ ground stress and geological environment, comprising 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, and a valve, characterized in that: It also has a humidity detection circuit and a pressure detection circuit; the upper and lower ends and one side end of the box body are of an open structure, detachable transparent observation plates are respectively installed at the front and rear ends of the box body, and the lower ends on both sides of the support frame are respectively installed on both sides of the upper end inside the bottom shell; there are at least two sliding blocks on the linear guide rail, and there are multiple sets of electric push rods. The linear guide rail is installed inside one side of the support frame, and the upper parts of two sets of electric push rods are respectively installed on both sides of the upper end inside the support frame, and the other two sets of electric push rods are respectively installed on the side ends of the two sliding blocks of the linear slide rail; the outer sides of the upper ends of the upper pressing plate are respectively installed together with the lower ends of two sets of electric push rods, and the upper pressing plate is located at the upper end inside the box body; the side pressing plate includes a guide plate and a moving plate. The guide plate is of a hollow structure, the moving plate is slidably sleeved inside the guide plate, and the outer ends of the guide plate and the moving plate are respectively installed together with the other side of the other two sets of electric push rods; the guide plate and the moving plate are located at one side end inside the box body; connecting pipes are respectively installed on the front and rear observation plates of the box body. One connecting pipe at the rear end is connected to one end of a valve, the other end of the valve is connected to a water pipe, one connecting pipe at the front end is connected to the slurry outlet pipe of a grouting pump, and a water 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 water overflow pipe; the humidity detection circuit and the pressure detection circuit are installed inside the component box, and the signal output ends of the pressure sensor and the humidity sensor are respectively electrically connected to the signal input ends of the pressure detection circuit and the humidity detection circuit.

2. The grouting test device for simulating the actual in-situ ground stress and geological environment basis according to claim 1, characterized in that: The front and rear widths of the upper pressing plate, the guide plate and the moving plate are smaller than the front and rear widths inside the box body.

3. The grouting test device for simulating the actual in-situ ground stress and geological environment foundation according to claim 1, characterized in that: There are rubber pads around the inner side end of the guide plate, and the moving plate is in elastic contact with the rubber pads.

4. The grouting test device for simulating the actual in-situ ground stress and geological environment basis according to claim 1, wherein: Use any one of an oil cylinder and a cylinder to replace the electric push rod.

5. The grouting test device that simulates the actual in-situ ground stress and geological environment basis according to claim 1, characterized in that: The observation plate is a high-strength acrylic plate.

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

7. The grouting test device for simulating the actual in-situ ground stress and geological environment basis according to claim 1, characterized in that: The front and rear width of a section at the upper end of the moving plate is smaller than the front and rear width inside the inner side of the guide plate.

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

9. The grouting test device for simulating the actual in-situ ground stress and geological environment basis according to claim 1, characterized in that: The humidity detection circuit includes an adjustable resistor RP1, a resistor R1, a resistor R2, a triode Q1 and an alarm lamp B!; the first fixed end and the movable end of the adjustable resistor RP1 are connected to the output end of the humidity sensor A3, and the second fixed end of the adjustable resistor RP1 is connected to the first ends of the resistor R1 and the resistor R2; the second end of the resistor R1 is connected to the emitter of the triode Q1; the second end of the resistor R2 is connected to the base of the triode Q1; the collector of the triode Q1 is connected to the negative power input end of the alarm lamp B1; the positive power input end of the alarm lamp B1 is connected to the power supply.

10. The grouting test device for simulating the actual in-situ ground stress and geological environment foundation according to claim 1, characterized in that: The pressure detection circuit includes an adjustable resistor RP2, a resistor R3, a resistor R4, a triode 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 the resistor R; and the resistor R4; the second end of the resistor R3 is connected to the emitter of the triode Q2; the second end of the resistor R4 is connected to the base of the triode Q2; the collector of the triode Q2 is connected to the negative power input end of the alarm lamp B2; the positive power input end of the alarm lamp B2 is connected to the power supply.

Images