CN113720759A - Simulation test device for tunnel surrounding rock concrete spray layer in corrosive solution - Google Patents
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Abstract
The invention discloses a simulation test device for a tunnel surrounding rock concrete spray layer in corrosive solution, which comprises a corrosive solution simulation box, a nitrogen supply mechanism, a carbon dioxide supply mechanism and a monitoring module, wherein the corrosive solution simulation box comprises a corrosion-resistant box body, a box cover and a rotating part, the rotating part comprises a turntable, a rotating shaft and a rotating motor, two groups of circulating pump mechanisms are arranged on the corrosion-resistant box body, a temperature adjusting part is arranged in the corrosion-resistant box body, and the monitoring module comprises a monitoring box, a microcontroller, a temperature sensor and a pressure sensor. The device is reasonable in design, can simulate the temperature and the confining pressure of the actual environment of the tunnel, can also simulate the state of the stratum corrosive solution of the tunnel surrounding rock concrete spray layer test piece, and improves the accuracy and the stability of the tunnel surrounding rock concrete spray layer corrosive solution simulation test.
Description
Technical Field
The invention belongs to the technical field of tunnel surrounding rock concrete spray layer corrosion simulation, and particularly relates to a simulation test device for a tunnel surrounding rock concrete spray layer in a corrosive solution.
Background
With the wide popularization of the 'new Austrian method', the relevant research of the tunnel shotcrete is greatly developed, the research focuses mainly on the aspects of mechanical mechanism, material characteristics, jetting technology, engineering application and the like of the shotcrete support, relatively speaking, the research on the adhesive property of the shotcrete and the surrounding rock is not deep enough, the relevant research mainly aims at the shotcrete material, the concrete shotcrete layer and the surrounding rock are not taken as a whole for research, and the influence effect of the mechanical property of the contact interface of the shotcrete and the surrounding rock and the external environment (mainly aiming at corrosive solution) is not considered. Therefore, it is very urgent and necessary to develop the tunnel surrounding rock-concrete spray layer adhesive property test and the deterioration mechanism research thereof under the action of the corrosive solution. Aiming at the problem, the problem that how to effectively utilize corrosive solution to accelerate corrosion of the tunnel surrounding rock-concrete sprayed layer is an indispensable key link for manually simulating the environment of the tunnel surrounding rock-concrete sprayed layer in the test process, and the requirement for environment test equipment is more strict.
In the traditional corrosion, a sample is directly soaked in a container filled with corrosive liquid, the deviation between the obtained result and the test result is large, because a plurality of factors can influence the final corrosion result, such as the temperature of the corrosive liquid, the ambient pressure, the stirring mode and the like, for a binary body of tunnel surrounding rock-concrete spray coating, the premise condition that the internal corrosion uniformity is ensured is that the test is completely carried out is provided, and the largest factor influencing the internal corrosion uniformity is the discharge of bubbles, heat conduction and ambient pressure in the reaction process. In order to obtain a uniform corrosion effect, the residence time of bubbles on the corrosion surface should be minimized, and the methods currently used are mainly shaking, stirrer stirring, corrosive liquid flow stirring, and the like. The methods have good effect on small-size test pieces, but for large-size test pieces, as the corrosion surface of the test pieces is enlarged, more bubbles are generated, and the bubbles cannot be removed quickly, so that the test quality of the test pieces is influenced.
Therefore, the simulation test device that tunnel country rock concrete spouts the layer and is in corrosive solution urgently needed not only can simulate the temperature and the confining pressure of the actual environment that the tunnel is located, can also simulate tunnel country rock concrete and spout the stratum corrosive solution state that the layer test piece is located, has improved tunnel country rock concrete and has spouted layer corrosive solution analogue test's accuracy and stability.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a simulation test device for a tunnel surrounding rock concrete spray layer in a corrosive solution, which is reasonable in design and convenient and fast to operate, can simulate the temperature and the confining pressure of the actual environment of a tunnel, can also simulate the state of a stratum corrosive solution of a tunnel surrounding rock concrete spray layer test piece, and improves the accuracy and the stability of a tunnel surrounding rock concrete spray layer corrosive solution simulation test.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the device comprises a corrosive solution simulation box, a nitrogen supply mechanism, a carbon dioxide supply mechanism and a monitoring module, wherein the corrosive solution simulation box comprises a corrosion-resistant box body for containing corrosive solution, a box cover arranged at the top of the corrosion-resistant box body and a rotating part arranged at the bottom of the corrosion-resistant box body and used for placing a tunnel surrounding rock concrete spray layer test piece, a temperature adjusting part is arranged in the corrosion-resistant box body, the nitrogen supply mechanism and the carbon dioxide supply mechanism are both connected with the corrosion-resistant box body, and two groups of circulating pump mechanisms for driving the corrosive solution to circulate are arranged on the corrosion-resistant box body;
the monitoring module comprises a monitoring box and a microcontroller arranged in the monitoring box, and a temperature sensor, a pressure sensor and a liquid level sensor which are arranged in the corrosion-resistant box, wherein the output ends of the temperature sensor, the pressure sensor and the liquid level sensor are connected with the input end of the microcontroller, and the rotating motor is controlled by the microcontroller.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the rotary table is provided with a plurality of L-shaped limiting plates for limiting and fixing the tunnel surrounding rock concrete spray layer test piece.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the two groups of circulating pump mechanisms are symmetrically arranged, the structures of the two groups of circulating pump mechanisms are the same, each group of circulating pump mechanisms comprises a lower circulating pipe, a circulating valve, a transition circulating pipe, a circulating pump and an upper circulating pipe which are sequentially connected, the height of the upper circulating pipe is higher than that of the lower circulating pipe, the lower circulating pipe is connected with the bottom of the side face of the corrosion-resistant box body, and the upper circulating pipe is connected with the middle of the side face of the corrosion-resistant box body.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the carbon dioxide supply mechanism comprises a carbon dioxide tank body and a delivery pump connected with the carbon dioxide tank body, the delivery pump is connected with the corrosion-resistant box body, the nitrogen supply mechanism comprises a nitrogen tank body, and the nitrogen tank body is connected with the corrosion-resistant box body.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: a first conveying pipe is arranged between the carbon dioxide tank body and the conveying pump, a second conveying pipe is arranged between the conveying pump and the corrosion-resistant box body, a first valve is arranged on the first conveying pipe, and a pressure release valve and a second valve are arranged on the second conveying pipe;
and a third conveying pipe is arranged between the nitrogen tank body and the corrosion-resistant box body, and a third valve and a fourth valve are arranged on the third conveying pipe.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the temperature adjusting part comprises a coil pipe arranged at the middle upper part of the corrosion-resistant box body, a three-way joint connected with an inlet of the coil pipe, a cold water inlet pipe and a hot water inlet pipe which are connected with the three-way joint, and a water return port of the coil pipe is connected with a water return tank.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the monitoring box is provided with a display screen and an alarm, the display screen and the alarm are controlled by a microcontroller, the output end of the microcontroller is connected with a motor driver, and the output end of the motor driver is connected with the input end of a rotating motor.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the rotary part comprises a turntable, a rotating shaft and a rotating motor, wherein the turntable is arranged in the corrosion-resistant box bottom and used for placing a tunnel surrounding rock concrete spray layer test piece, the rotating shaft is connected with the bottom of the turntable and penetrates through the corrosion-resistant box bottom, and the rotating motor extends out of the rotating shaft to be connected with the end.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: a motor support for mounting a rotating motor in the rotating part is arranged outside the bottom of the corrosion-resistant box body, and supporting legs are arranged at four corners outside the bottom of the corrosion-resistant box body;
and a sealing ring is arranged at the joint of the box cover and the top of the corrosion-resistant box body, so that the box cover and the corrosion-resistant box body are enclosed into a closed cavity.
Foretell tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: a handle is arranged at the top of the box cover, an exhaust pipe communicated with the closed cavity is arranged in the box cover, and an exhaust valve is arranged on the exhaust pipe;
and a liquid discharge pipe is arranged at the bottom of the corrosion-resistant box body, and a liquid discharge valve is arranged on the liquid discharge pipe.
Compared with the prior art, the invention has the following advantages:
1. simple structure, reasonable in design and installation are laid portably, and the simple operation has improved tunnel surrounding rock concrete and has spouted layer corrosive solution analogue test's accuracy and stability.
2. The invention is provided with a nitrogen supply mechanism and a carbon dioxide supply mechanism, and nitrogen is input into the corrosion-resistant box body through the nitrogen supply mechanism so as to discharge air in the corrosion-resistant box body; carbon dioxide is fed into the corrosion-resistant tank through a carbon dioxide feeding mechanism to discharge nitrogen in the corrosion-resistant tank, and the pressure in the corrosion-resistant tank is adjusted by continuing feeding carbon dioxide.
3. The temperature adjusting part is arranged to cool or heat the corrosion-resistant box body so as to adjust the temperature in the corrosion-resistant box body, so that the temperature of the environment where the tunnel surrounding rock concrete spray layer test piece is located can be adjusted.
4. The invention is provided with the pressure sensor, so that the pressure detected by the pressure sensor meets the requirement value of a confining pressure test; the temperature sensor is arranged, so that the temperature detected by the temperature sensor meets the environmental temperature of the area where the surrounding rock is located, external environmental conditions are well simulated, and the accuracy of simulating the external environment is improved; in addition, the simulated corrosion is carried out on the tunnel surrounding rock concrete sprayed layer test piece under the environment with certain confining pressure and relative temperature, and the damage degree of the tunnel surrounding rock concrete sprayed layer in a certain time range and the change of mechanical parameters such as shear strength, internal cohesive force and the like are reproduced.
5. The rotary part is arranged, so that the rotary part can drive the tunnel surrounding rock concrete spray layer test piece to rotate, and the corrosion test operation is accelerated; and the rotation of the tunnel surrounding rock concrete spray layer test piece can drive the corrosive solution in the corrosion-resistant box body to flow, so that the flow speed of the corrosive solution in the corrosion-resistant box body accords with the water flow speed of the actual site of the tunnel excavation.
6. The circulating pump mechanism is arranged, so that corrosive solution in the corrosion-resistant box body flows in a circulating channel in a circulating mode through the circulating pump mechanism, bubbles generated in the corrosion reaction process of the concrete sprayed layer test piece of the tunnel surrounding rock are removed quickly, and the accuracy of obtaining various subsequent mechanical parameters is improved.
In conclusion, the device is reasonable in design and convenient and fast to operate, can simulate the temperature and the confining pressure of the actual environment where the tunnel is located, can also simulate the state of the formation corrosion solution where the test piece of the concrete sprayed layer of the surrounding rock of the tunnel is located, and improves the accuracy and the stability of the simulation test of the corrosion solution of the concrete sprayed layer of the surrounding rock of the tunnel.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural diagram of the corrosion solution simulation tank of the present invention.
Fig. 3 is a schematic block diagram of the circuit of the present invention.
Description of reference numerals:
1-a turntable; 1-a rotating shaft; 1-2-a coupler;
1-3-rotating electrical machines; 1-4-motor support; 2, supporting legs;
3-a handle; 4-a circulating pump mechanism; 4-1-lower circulation pipe;
4-2-circulation valve; 4-3-transition circulation pipe; 4-circulation pump;
4-5-upper circulation pipe; 5, coiling a pipe; 5-1-a three-way joint;
5-2-cold water inlet pipe; 5-3-hot water inlet pipe; 6-a pressure sensor;
7-temperature sensor; 8, a monitoring box; 8-1 — a microcontroller;
8-2-display screen; 8-3-motor drive; 8-4-alarm;
9-corrosion resistant box body; 9-1-liquid inlet pipe; 10-a carbon dioxide tank;
10-1 — a first delivery pipe; 10-2 — a first valve; 11-a transfer pump;
12-nitrogen tank body; 12-1 — a third delivery pipe; 12-2 — a third valve;
12-3-a fourth valve; 13-a pressure relief valve; 14-a box cover;
15-exhaust pipe; 15-1-exhaust valve; 16-1 — a second delivery tube;
16-2 — a second valve; 17-a sealing ring; 18-L-shaped limiting plate;
19-spraying a layer test piece on the concrete of the tunnel surrounding rock; 20-drain pipe;
20-1-drain valve; 21-a liquid level sensor; 22-rotational speed sensor.
Detailed Description
As shown in fig. 1 to 3, the device comprises a corrosive solution simulation box, a nitrogen supply mechanism, a carbon dioxide supply mechanism and a monitoring module, wherein the corrosive solution simulation box comprises a corrosion-resistant box body 9 for containing a corrosive solution, a box cover 14 arranged at the top of the corrosion-resistant box body 9 and a rotating part arranged at the bottom of the corrosion-resistant box body 9 and used for placing a tunnel surrounding rock concrete spray layer test piece 19, a temperature adjusting part is arranged in the corrosion-resistant box body 9, the nitrogen supply mechanism and the carbon dioxide supply mechanism are both connected with the corrosion-resistant box body 9, and two groups of circulating pump mechanisms 4 for driving the corrosive solution to circulate are arranged on the corrosion-resistant box body 9;
the monitoring module comprises a monitoring box 8, a microcontroller 8-1 arranged in the monitoring box 8, a temperature sensor 7, a pressure sensor 6 and a liquid level sensor 21 which are arranged in a corrosion-resistant box body 9, the output ends of the temperature sensor 7, the pressure sensor 6 and the liquid level sensor 21 are connected with the input end of the microcontroller 8-1, and the rotating motor 1-3 is controlled by the microcontroller 8-1.
In this embodiment, be provided with a plurality of L shape limiting plates 18 that carry out spacing fixed to tunnel country rock concrete spraying layer test piece 19 on the carousel 1.
In the embodiment, two groups of the circulating pump mechanisms 4 are symmetrically arranged, the two groups of the circulating pump mechanisms 4 have the same structure, each group of the circulating pump mechanisms 4 comprises a lower circulating pipe 4-1, a circulating valve 4-2, a transition circulating pipe 4-3, a circulating pump 4-4 and an upper circulating pipe 4-5 which are sequentially connected, the height of the upper circulating pipe 4-5 is higher than that of the lower circulating pipe 4-1, the lower circulating pipe 4-1 is connected with the bottom of the side face of the corrosion-resistant box body 9, and the upper circulating pipe 4-5 is connected with the middle of the side face of the corrosion-resistant box body 9.
In this embodiment, the carbon dioxide supply mechanism includes a carbon dioxide tank 10 and a delivery pump 11 connected to the carbon dioxide tank 10, the delivery pump 11 is connected to the corrosion-resistant box 9, the nitrogen supply mechanism includes a nitrogen tank 12, and the nitrogen tank 12 is connected to the corrosion-resistant box 9.
In the embodiment, a first conveying pipe 10-1 is arranged between the carbon dioxide tank body 10 and the conveying pump 11, a second conveying pipe 16-1 is arranged between the conveying pump 11 and the corrosion-resistant box body 9, a first valve 10-2 is arranged on the first conveying pipe 10-1, and a pressure release valve 13 and a second valve 16-2 are arranged on the second conveying pipe 16-1;
a third conveying pipe 12-1 is arranged between the nitrogen tank 12 and the corrosion-resistant box body 9, and a third valve 12-2 and a fourth valve 12-3 are arranged on the third conveying pipe 12-1.
In this embodiment, the temperature adjusting component includes a coil pipe 5 disposed at the middle upper portion of the corrosion-resistant box body 9, a three-way joint 5-1 connected to an inlet of the coil pipe 5, and a cold water inlet pipe 5-2 and a hot water inlet pipe 5-3 connected to the three-way joint 5-1, and a water return port of the coil pipe 5 is connected to a water return tank.
In the embodiment, the monitoring box 8 is provided with a display screen 8-2 and an alarm 8-4, the display screen 8-2 and the alarm 8-4 are controlled by a microcontroller 8-1, the output end of the microcontroller 8-1 is connected with a motor driver 8-3, and the output end of the motor driver 8-3 is connected with the input end of a rotating motor 1-3.
In the embodiment, the rotating part comprises a turntable 1 which is arranged in the bottom of the corrosion-resistant box body 9 and is used for placing the tunnel surrounding rock concrete spraying layer test piece 19, a rotating shaft 1-1 which is connected with the bottom of the turntable 1 and penetrates through the bottom of the corrosion-resistant box body 9, and a rotating motor 1-3 which is connected with the extending end of the rotating shaft 1-1.
In the embodiment, a motor support 1-4 for mounting a rotating motor 1-3 in the rotating part is arranged outside the bottom of the corrosion-resistant box body 9, and supporting legs 2 are arranged at four outer corners of the bottom of the corrosion-resistant box body 9;
and a sealing ring 17 is arranged at the joint of the top of the box cover 14 and the top of the corrosion-resistant box body 9, so that the box cover 14 and the corrosion-resistant box body 9 are enclosed into a closed cavity.
In this embodiment, the top of the box cover 14 is provided with a handle 3, an exhaust pipe 15 communicated with the closed cavity is arranged in the box cover 14, and an exhaust valve 15-1 is arranged on the exhaust pipe 15;
a liquid discharge pipe 20 is arranged at the bottom of the corrosion-resistant box body 9, and a liquid discharge valve 20-1 is arranged on the liquid discharge pipe 20.
In this embodiment, the temperature sensor 7, the pressure sensor 6, and the liquid level sensor 21 are all corrosion-resistant temperature sensors, corrosion-resistant pressure sensors, and corrosion-resistant liquid level sensors.
In this embodiment, the microcontroller 8-1 is a single chip microcomputer or an ARM microcontroller or the like.
In this embodiment, in practical use, the rotation speed sensor 22 may refer to an encoder, and the encoder and the rotating electrical machines 1 to 3 may be integrated into a whole, that is, a stepping motor with an encoder.
In this embodiment, the third valve 12-2 is disposed adjacent to the nitrogen tank 12, and the fourth valve 12-3 is disposed adjacent to the corrosion resistant tank 9.
In this embodiment, the pressure relief valve 13 is provided to relieve pressure when a large amount of gas pressure is excessively accumulated.
In the embodiment, during actual connection, the output shaft of the rotating motor 1-3 is in transmission connection with the extending end of the rotating shaft 1-1 through the coupler 1-2, and a sealing element is arranged at the joint of the rotating shaft 1-1 and the bottom of the corrosion-resistant box body 9.
In the embodiment, during actual use, the drain pipe 20 is arranged, so that the drain valve 20-1 is operated to be opened after the test is finished, and the corrosive solution in the corrosion-resistant box body 9 is drained.
In the embodiment, the microcontroller 8-1 controls the rotating motor 1-3 to rotate through the motor driver 8-3, the rotating motor 1-3 drives the rotating disc 1 to rotate through the rotating shaft 1-1, and the rotating disc 1 drives the tunnel surrounding rock concrete spray layer test piece 19 to rotate; in the process that the rotating motor 1-3 drives the tunnel surrounding rock concrete spray layer test piece 19 to rotate, the rotating speed sensor 22 detects the rotating speed of the rotating motor 1-3 and sends the detected rotating speed to the microcontroller 40, and the microcontroller 40 controls the display screen 8-2 to display the rotating speed until the rotating speed meets the rotating speed test requirement value.
In the embodiment, in the process that the rotary motor 1-3 drives the tunnel surrounding rock concrete spray layer test piece 19 to rotate, the circulating valve 4-2 is also operated to be opened, the circulating pump 4-4 works, and the corrosive solution at the bottom in the corrosion-resistant box body 9 is conveyed to the middle of the corrosion-resistant box body 9 sequentially through the lower circulating pipe 4-1, the circulating valve 4-2, the transition circulating pipe 4-3, the circulating pump 4-4 and the upper circulating pipe 4-5 so as to promote the circulating flow of the corrosive solution and quickly remove bubbles in the corrosive solution.
In this embodiment, cooling water is introduced through the cold water inlet pipe 5-2 to the coil pipe 5 to cool the corrosion-resistant box body 9, or heating water is introduced through the hot water inlet pipe 5-3 to the coil pipe 5 to heat the corrosion-resistant box body 9, so that the temperature detected by the temperature sensor 7 meets the environmental temperature of the surrounding rock in the area where the tunnel is located.
In the embodiment, the third valve 12-2, the fourth valve 12-3 and the exhaust valve 15-1 are operated to be opened, and nitrogen in the nitrogen tank 12 is input into the corrosion-resistant box 9 through the third delivery pipe 12-1 to exhaust air in the corrosion-resistant box 9;
then, the third valve 12-2 and the fourth valve 12-3 are operated to be closed, the first valve 10-2 and the second valve 16-2 are operated to be opened, the delivery pump 11 works, and carbon dioxide in the carbon dioxide tank body 10 sequentially passes through the first delivery pipe 10-1, the delivery pump 11 and the second delivery pipe 16-1 to be input into the corrosion-resistant box body 9 so as to discharge nitrogen in the corrosion-resistant box body 9; and (4) closing the exhaust valve 15-1, and continuing to input carbon dioxide into the corrosion-resistant box body 9 until the pressure detected by the pressure sensor 6 meets the requirement of the confining pressure test, and closing the first valve 10-2 and the second valve 16-2.
In the embodiment, the liquid is injected into the corrosion-resistant box body 9 through the liquid inlet pipe 9-1 until the liquid level detected by the liquid level sensor 4 meets the requirement value of a liquid level test. After the test is finished, the exhaust valve 15-1 is opened to exhaust, so that the box cover 14 can be opened smoothly.
In the embodiment, the display screen 8-2 is arranged, so that when the temperature, pressure and liquid level data respectively detected by the temperature sensor 7, the pressure sensor 6 and the liquid level sensor 21 are sent to the microcontroller 8-1, the microcontroller 8-1 controls the display screen 8-2 to display the temperature, pressure and liquid level data, and the temperature, pressure and liquid level data are convenient for a tester to check; in addition, an alarm 8-4 is arranged for giving an alarm when the detected temperature does not accord with the temperature test required value, the pressure does not accord with the confining pressure test required value and the liquid level data does not accord with the liquid level test required value.
In conclusion, the device is reasonable in design and convenient and fast to operate, can simulate the temperature and the confining pressure of the actual environment where the tunnel is located, can also simulate the state of the formation corrosion solution where the test piece of the concrete sprayed layer of the surrounding rock of the tunnel is located, and improves the accuracy and the stability of the simulation test of the corrosion solution of the concrete sprayed layer of the surrounding rock of the tunnel.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a tunnel country rock concrete spouts layer and is in corrosion solution's analogue test device which characterized in that: the corrosion solution simulation box comprises a corrosion solution simulation box, a nitrogen supply mechanism, a carbon dioxide supply mechanism and a monitoring module, wherein the corrosion solution simulation box comprises a corrosion-resistant box body (9) for containing a corrosion solution, a box cover (14) arranged at the top of the corrosion-resistant box body (9) and a rotating part arranged at the bottom of the corrosion-resistant box body (9) and used for placing a tunnel surrounding rock concrete spray layer test piece (19), a temperature adjusting part is arranged in the corrosion-resistant box body (9), the nitrogen supply mechanism and the carbon dioxide supply mechanism are both connected with the corrosion-resistant box body (9), and two groups of circulating pump mechanisms (4) for driving the corrosion solution to circulate are arranged on the corrosion-resistant box body (9);
the monitoring module comprises a monitoring box (8) and a microcontroller (8-1) arranged in the monitoring box (8), and a temperature sensor (7), a pressure sensor (6) and a liquid level sensor (21) arranged in a corrosion-resistant box body (9), wherein the output ends of the temperature sensor (7), the pressure sensor (6) and the liquid level sensor (21) are connected with the input end of the microcontroller (8-1), and the rotating motor (1-3) is controlled by the microcontroller (8-1).
2. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: the rotary table (1) is provided with a plurality of L-shaped limiting plates (18) for limiting and fixing the tunnel surrounding rock concrete spray layer test piece (19).
3. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: the two groups of circulating pump mechanisms (4) are symmetrically arranged, the structures of the two groups of circulating pump mechanisms (4) are the same, each group of circulating pump mechanisms (4) comprises a lower circulating pipe (4-1), a circulating valve (4-2), a transition circulating pipe (4-3), a circulating pump (4-4) and an upper circulating pipe (4-5) which are sequentially connected, the height of the upper circulating pipe (4-5) is higher than that of the lower circulating pipe (4-1), the lower circulating pipe (4-1) is connected with the bottom of the side face of the corrosion-resistant box body (9), and the upper circulating pipe (4-5) is connected with the middle of the side face of the corrosion-resistant box body (9).
4. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: the carbon dioxide supply mechanism comprises a carbon dioxide tank body (10) and a delivery pump (11) connected with the carbon dioxide tank body (10), the delivery pump (11) is connected with the corrosion-resistant box body (9), the nitrogen supply mechanism comprises a nitrogen tank body (12), and the nitrogen tank body (12) is connected with the corrosion-resistant box body (9).
5. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 4, characterized in that: a first conveying pipe (10-1) is arranged between the carbon dioxide tank body (10) and the conveying pump (11), a second conveying pipe (16-1) is arranged between the conveying pump (11) and the corrosion-resistant box body (9), a first valve (10-2) is arranged on the first conveying pipe (10-1), and a pressure release valve (13) and a second valve (16-2) are arranged on the second conveying pipe (16-1);
a third conveying pipe (12-1) is arranged between the nitrogen tank body (12) and the corrosion-resistant box body (9), and a third valve (12-2) and a fourth valve (12-3) are arranged on the third conveying pipe (12-1).
6. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: the temperature adjusting part comprises a coil pipe (5) arranged at the middle upper part of the corrosion-resistant box body (9), a three-way joint (5-1) connected with an inlet of the coil pipe (5), a cold water inlet pipe (5-2) and a hot water inlet pipe (5-3) connected with the three-way joint (5-1), and a water return port of the coil pipe (5) is connected with a water return tank.
7. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: be provided with display screen (8-2) and alarm (8-4) on control box (8), display screen (8-2) and alarm (8-4) are controlled by microcontroller (8-1), microcontroller's (8-1) output termination has motor driver (8-3), the output of motor driver (8-3) and the input of rotating electrical machines (1-3) are connected.
8. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: the rotating part comprises a turntable (1) which is arranged in the bottom of the corrosion-resistant box body (9) and used for placing a tunnel surrounding rock concrete spray layer test piece (19), a rotating shaft (1-1) which is connected with the bottom of the turntable (1) and penetrates through the bottom of the corrosion-resistant box body (9), and a rotating motor (1-3) which is connected with the extending end of the rotating shaft (1-1).
9. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 1, characterized in that: a motor support (1-4) for mounting a rotating motor (1-3) in the rotating part is arranged outside the bottom of the corrosion-resistant box body (9), and supporting legs (2) are arranged at four outer corners of the bottom of the corrosion-resistant box body (9);
and a sealing ring (17) is arranged at the joint of the top of the box cover (14) and the top of the corrosion-resistant box body (9) so that the box cover (14) and the corrosion-resistant box body (9) enclose a closed cavity.
10. The simulation test device for the tunnel surrounding rock concrete spray layer in the corrosive solution according to claim 9, characterized in that: a handle (3) is arranged at the top of the box cover (14), an exhaust pipe (15) communicated with the closed cavity is arranged in the box cover (14), and an exhaust valve (15-1) is arranged on the exhaust pipe (15);
a liquid discharge pipe (20) is arranged at the bottom of the corrosion-resistant box body (9), and a liquid discharge valve (20-1) is arranged on the liquid discharge pipe (20).
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