Soil resistivity test system under seepage erosion and environment temperature change coupling effect

Abstract

The utility model provides a system for testing the resistivity of a soil body under the coupling action of seepage erosion and environment temperature change, which comprises a seepage chamber with a seepage cavity inside; a temperature change cavity is formed in the temperature change chamber; the temperature adjusting device is communicated with the temperature change cavity; one end of the inflow device is communicated with an external water inlet pipeline, and the other end of the inflow device sequentially penetrates through one side wall of the temperature change chamber, the temperature change cavity and one side wall of the seepage chamber and is communicated with the seepage cavity; one end of the outflow device is communicated with the seepage cavity, and the other end of the outflow device sequentially penetrates through the other side wall of the seepage chamber, the temperature change cavity and the other side wall of the temperature change chamber and is arranged outside the temperature change chamber; the temperature and humidity detection device is in contact with the soil sample and is used for detecting the temperature and humidity of the soil sample; and the resistivity detection device is in contact with the soil sample and is used for detecting the resistivity of the soil sample. According to the soil resistivity test system, the soil resistivity test under seepage erosion, environment temperature change and the coupling effect of seepage erosion and environment temperature change can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering investigation and testing, and particularly relates to a soil resistivity testing system under the coupling action of seepage erosion and environmental temperature change. Background Technique

[0002] Resistivity is one of the inherent properties of soil. Through soil resistivity testing, the changes in the microscopic structure and physical and mechanical properties of soil can be effectively evaluated. Soil resistivity testing is also of great significance for power grounding projects. There are many factors affecting soil resistivity, and its magnitude is usually affected by soil structure, porosity, cementation degree, water content, electrolyte content, and environmental temperature. Soil resistivity testing has the characteristics of non-destructive and fast, and is a very effective means to evaluate soil structure and damage changes. After rainfall on the surface soil, seepage often occurs inside it. Seepage will cause erosion to the surface soil. The formation of slope landslides and erosion gullies is often related to seepage erosion. On the one hand, seepage erosion causes the loss of cementing substances and electrolytes in the soil, on the other hand, it also causes changes in the internal structure of the soil, and at the same time, it will also lead to changes in soil resistivity. The change of environmental temperature is also an important factor causing changes in soil resistivity. When the temperature decreases, on the one hand, the soil will undergo shrinkage deformation, on the other hand, it will cause the movement speed of electrolytes in the soil to slow down and the electrical conductivity to decrease, thus resulting in an increase in soil resistivity.

[0003] At present, the existing soil resistivity testers are used to test specific soils, and often can only test the soil resistivity at a certain constant temperature and humidity. Usually, they cannot test the soil resistivity in real time under changing environmental temperature conditions to explore the influence law of environmental temperature change on resistivity; in addition, some instruments can consider the influence of the change of soil water content on resistivity, but often cannot test the resistivity of soil under the action of seepage erosion and the coupling action of seepage erosion and environmental temperature change.

[0004] That is to say, how to provide a soil resistivity testing system under the coupling action of seepage erosion and environmental temperature change, which can realize the testing of soil resistivity under the actions of seepage erosion, environmental temperature change, and their coupling action, is a technical problem that needs to be solved urgently by those skilled in the art. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is that the existing soil resistivity testers can often only test the soil resistivity at a certain constant temperature and humidity, and often cannot explore the change law of soil resistivity under the actions of seepage erosion, environmental temperature change, and their coupling action and other technical problems.

[0006] To solve the above problems, the present utility model provides a soil resistivity testing system under the coupled action of seepage erosion and environmental temperature change, comprising: a seepage chamber with a seepage cavity inside, in which a soil sample is placed; a temperature change chamber with a temperature change cavity inside, and the seepage chamber is placed in the temperature change cavity; a temperature adjustment device connected to the temperature change cavity, and the temperature adjustment device is used to adjust the temperature in the temperature change cavity; an inflow device, one end of which is connected to an external water inlet pipe, and the other end sequentially passes through a side wall of the temperature change chamber, the temperature change cavity, a side wall of the seepage chamber and is connected to the seepage cavity; an outflow device, one end of which is connected to the seepage cavity, and the other end sequentially passes through another side wall of the seepage chamber, the temperature change cavity, another side wall of the temperature change chamber and is placed outside the temperature change chamber; a temperature and humidity detection device in contact with the soil sample, and the temperature and humidity detection device is used to detect the temperature and humidity of the soil sample; a resistivity detection device in contact with the soil sample, and the resistivity detection device is used to detect the resistivity of the soil sample.

[0007] As a further technical solution of the present utility model: the temperature adjustment device comprises: a temperature adjustment air conditioner with an air conditioner air outlet port and an air conditioner air inlet port, and an air conditioner temperature control valve and an air conditioner flow rate valve are adjacently arranged on the temperature adjustment air conditioner; an air outlet hose, one end of which is connected to the air conditioner air outlet port, and a temperature change chamber air inlet is opened at the lower part of a side wall of the temperature change chamber, and the other end of the air outlet hose is connected to the temperature change cavity through the temperature change chamber air inlet; an air inlet hose, one end of which is connected to the air conditioner air inlet port, and a temperature change chamber air outlet is opened at the upper part of another side wall of the temperature change chamber, and the other end of the air inlet hose is connected to the temperature change cavity through the temperature change chamber air outlet.

[0008] As a further technical solution of the present utility model: the inflow device comprises: a booster water pump connected to the external water inlet pipe; an inflow pipe, one end of which is connected to the booster water pump, and the other end sequentially passes through a side wall of the temperature change chamber, the temperature change cavity, a side wall of the seepage chamber and is connected to the seepage cavity; a water flow rate meter arranged on the inflow pipe; a water flow valve arranged on the inflow pipe and adjacent to the water flow rate meter.

[0009] As a further technical solution of the present utility model: the outflow device comprises: an outflow pipe, one end of which is connected to the seepage cavity; a water storage tank placed outside the temperature change chamber, and the other end of the outflow pipe sequentially passes through another side wall of the seepage chamber, the temperature change cavity, another side wall of the temperature change chamber and is connected to the water storage tank.

[0010] As a further technical solution of the present utility model: it further comprises: a drying device arranged on the inflow pipe and located between the water flow valve and the temperature change chamber.

[0011] As a further technical solution of the present utility model: the drying device includes: an air flow pipe, one end of which is connected to the inlet flow pipe and is located between the water flow valve and the temperature change chamber; an air pump, which is connected to the other end of the air flow pipe; and an air flow valve, which is arranged on the air flow pipe.

[0012] As a further technical solution of the present utility model: the seepage chamber includes: a seepage chamber body, with a first bottom plate slot and a second bottom plate slot opened at the bottom, and the first bottom plate slot and the second bottom plate slot are arranged at intervals along the length direction of the seepage chamber body; a seepage chamber top plate, which is detachably arranged on the top of the seepage chamber body and encloses the seepage space with the seepage chamber body, and a first sealant is arranged at the connection between the seepage chamber top plate and the seepage chamber body. The bottom surface of the seepage chamber top plate is provided with a first top plate slot and a second top plate slot. The first top plate slot and the first bottom plate slot are located in the same vertical plane, and the second top plate slot and the second bottom plate slot are located in the same vertical plane; a first iron screen, the top end of which is inserted into the first top plate slot and the bottom end of which is inserted into the first bottom plate slot; a second iron screen, the top end of which is inserted into the second top plate slot and the bottom end of which is inserted into the second bottom plate slot. The seepage chamber body, the seepage chamber top plate, the first iron screen and the second iron screen enclose a placement space, and a soil sample is placed in the placement space; four seepage chamber support rods, and the bottom of the seepage chamber body is fixedly connected to the temperature change chamber through the four seepage chamber support rods.

[0013] As a further technical solution of the present utility model: the temperature change chamber includes: a temperature change chamber body, with the temperature change chamber air inlet opened at the lower part of one side wall and the temperature change chamber air outlet opened at the upper part of the other side wall; a temperature change chamber top plate, which is detachably arranged on the top of the temperature change chamber body and encloses the temperature change space with the temperature change chamber body, and a second sealant is arranged at the connection between the temperature change chamber top plate and the temperature change chamber body; four temperature change chamber support rods, and the four temperature change chamber support rods are evenly arranged at the bottom of the temperature change chamber body.

[0014] As a further technical solution of the present utility model: the temperature and humidity detection device includes: a temperature and humidity sensor, which has a probe end and a transmission end. A probe insertion hole is opened on the side wall of the seepage chamber body, and the probe insertion hole is located between the first iron screen and the second iron screen. The probe end passes through the probe insertion hole and is inserted into the soil sample; a temperature and humidity tester, which is placed outside the temperature change chamber body; a temperature and humidity sensing wire harness, one end of which is connected to the transmission end. A wire passing hole is opened at the bottom of the temperature change chamber body, and the other end of the temperature and humidity sensing wire harness passes through the wire passing hole and is connected to the temperature and humidity tester; four electronic thermometers, and the four electronic thermometers are symmetrically arranged on the two side walls of the temperature change chamber body.

[0015] As a further technical solution of the present utility model: the resistivity detection device includes: an upper electrode fixed to the bottom surface of the top plate of the seepage chamber and located within the placement space; a lower electrode fixed to the bottom of the seepage chamber body and located within the placement space; a resistivity tester placed outside the temperature change chamber body; an upper electrode wire bundle, the top plate of the seepage chamber is provided with a first reserved hole, one end of the upper electrode wire bundle passes through the first reserved hole and is connected to the upper electrode, and the other end of the upper electrode wire bundle passes through the wire passing hole and is connected to the resistivity tester; a lower electrode wire bundle, the bottom of the seepage chamber body is provided with a second reserved hole, one end of the lower electrode wire bundle passes through the second reserved hole and is connected to the lower electrode, and the other end of the lower electrode wire bundle passes through the wire passing hole and is connected to the resistivity tester.

[0016] Beneficial effects:

[0017] A soil resistivity test system under the coupled action of seepage erosion and environmental temperature change provided by the present utility model includes a seepage chamber, a temperature change chamber, a temperature adjustment device, an inflow device, an outflow device, a temperature and humidity detection device, and a resistivity detection device. The temperature adjustment device is connected to the temperature change cavity inside the temperature change chamber to adjust the temperature inside the temperature change cavity through the temperature adjustment device, so as to simulate the environmental temperature change under real conditions for the soil sample in the seepage cavity of the seepage chamber, and detect the temperature and humidity of the soil sample through the temperature and humidity detection device in contact with the soil sample, and detect the resistivity of the soil sample through the resistivity detection device in contact with the soil sample, so as to analyze the influence of environmental temperature change on the resistivity of the soil sample in the seepage cavity; one end of the inflow device is connected to an external water inlet pipe, and the other end sequentially passes through a side wall of the temperature change chamber, the temperature change cavity, a side wall of the seepage chamber and is connected to the seepage cavity. One end of the outflow device is connected to the seepage cavity, and the other end sequentially passes through another side wall of the seepage chamber, the temperature change cavity, another side wall of the temperature change chamber and is placed outside the temperature change chamber. Water flow can be conveyed to one end of the inflow device through the external water inlet pipe, so that the water flow enters the seepage cavity from a side wall of the seepage chamber through the inflow device and then is discharged from the outflow device on another side wall of the seepage chamber to simulate the soil body seepage erosion process under real conditions for the soil sample in the seepage cavity, so as to analyze the influence of seepage erosion on the soil resistivity. In addition, by simultaneously turning on the temperature adjustment device, the inflow device and the outflow device, the coupled action of seepage erosion and environmental temperature change can also be simulated, so as to analyze the change law of the resistivity of the soil sample under the coupled action of seepage erosion and environmental temperature change. The system of the present utility model is convenient and flexible to test and operate, the results are true and reliable, and the test of the soil resistivity under seepage erosion, environmental temperature change and the coupled action of seepage erosion and environmental temperature change can be realized. Description of the drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a soil resistivity test system under the coupling action of seepage erosion and environmental temperature change provided by an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the top plate of the seepage chamber provided by an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the seepage chamber body provided by an embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the temperature change chamber body provided by an embodiment of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the top plate of the temperature change chamber provided by an embodiment of the present invention;

[0024] Reference numerals:

[0025] 1. Seepage chamber; 11. Seepage chamber body; 111. First bottom plate slot; 112. Second bottom plate slot; 12. Seepage chamber top plate; 121. First top plate slot; 122. Second top plate slot; 13. First iron screen; 14. Second iron screen; 15. Seepage chamber support rod;

[0026] 2. Temperature change chamber; 21. Temperature change chamber air inlet; 22. Temperature change chamber air outlet; 23. Temperature change chamber body; 231. Wire passing hole; 24. Temperature change chamber top plate; 25. Temperature change chamber support rod;

[0027] 3. Temperature adjustment device; 31. Temperature adjustment air conditioner; 32. Exhaust hose; 33. Intake hose; 34. Air conditioner exhaust port; 35. Air conditioner intake port; 36. Air conditioner temperature control valve; 37. Air conditioner flow rate valve;

[0028] 4. Inflow device; 41. Booster pump; 42. Inflow pipe; 43. Water flow rate meter; 44. Water flow valve;

[0029] 5. Outflow device; 51. Outflow pipe; 52. Water storage tank;

[0030] 6. Temperature and humidity detection device; 61. Temperature and humidity sensor; 611. Probe end; 612. Transmission end; 62. Temperature and humidity tester; 63. Temperature and humidity sensing wire harness; 64. Electronic thermometer;

[0031] 7. Resistivity detection device; 71. Upper electrode; 72. Lower electrode; 73. Resistivity tester; 74. Upper electrode wire bundle; 75. Lower electrode wire bundle;

[0032] 8. Drying device; 81. Air flow pipe; 82. Air pump; 83. Air flow valve;

[0033] 9. External water inlet pipe. Specific implementation manner

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] Embodiment 1:

[0036] As Figures 1 to 5 shown, Embodiment 1 of the present embodiment provides a soil resistivity test system under the coupled action of seepage erosion and environmental temperature change, including a seepage chamber 1, a temperature change chamber 2, a temperature adjustment device 3, an inflow device 4, an outflow device 5, a temperature and humidity detection device 6, and a resistivity detection device 7. Among them, the inside of the seepage chamber 1 has a seepage cavity, and a soil sample is placed in the seepage cavity; the inside of the temperature change chamber 2 has a temperature change cavity, and the seepage chamber 1 is placed in the temperature change cavity; the temperature adjustment device 3 is communicated with the temperature change cavity, and the temperature adjustment device 3 is used to adjust the temperature in the temperature change cavity; one end of the inflow device 4 is communicated with the external water inlet pipe 9, and the other end sequentially passes through a side wall of the temperature change chamber 2, the temperature change cavity, a side wall of the seepage chamber 1 and is communicated with the seepage cavity; one end of the outflow device 5 is communicated with the seepage cavity, and the other end sequentially passes through another side wall of the seepage chamber 1, the temperature change cavity, another side wall of the temperature change chamber 2 and is placed outside the temperature change chamber 2; the temperature and humidity detection device 6 is in contact with the soil sample, and the temperature and humidity detection device 6 is used to detect the temperature and humidity of the soil sample; the resistivity detection device 7 is in contact with the soil sample, and the resistivity detection device 7 is used to detect the resistivity of the soil sample.

[0037] Specifically, a soil resistivity testing system under the coupled action of seepage erosion and environmental temperature change provided by the present utility model includes a seepage chamber 1, a temperature change chamber 2, a temperature adjustment device 3, an inflow device 4, an outflow device 5, a temperature and humidity detection device 6, and a resistivity detection device 7. The temperature adjustment device 3 is connected to the temperature change cavity inside the temperature change chamber 2 to adjust the temperature inside the temperature change cavity through the temperature adjustment device 3, so as to simulate the environmental temperature change under real conditions for the soil sample in the seepage cavity of the seepage chamber 1. The temperature and humidity of the soil sample are detected by the temperature and humidity detection device 6 in contact with the soil sample, and the resistivity of the soil sample is detected by the resistivity detection device 7 in contact with the soil sample, so as to analyze the influence of environmental temperature change on the resistivity of the soil sample in the seepage cavity. One end of the inflow device 4 is connected to an external water inlet pipe 9, and the other end sequentially passes through one side wall of the temperature change chamber 2, the temperature change cavity, one side wall of the seepage chamber 1 and is connected to the seepage cavity. One end of the outflow device 5 is connected to the seepage cavity, and the other end sequentially passes through the other side wall of the seepage chamber 1, the temperature change cavity, the other side wall of the temperature change chamber 2 and is placed outside the temperature change chamber 2. Water flow can be conveyed to one end of the inflow device 4 through the external water inlet pipe 9, so that the water flow enters the seepage cavity from one side wall of the seepage chamber 1 through the inflow device 4 and then is discharged from the outflow device 5 on the other side wall of the seepage chamber 1, so as to simulate the soil seepage erosion process under real conditions for the soil sample in the seepage cavity, and further analyze the influence of seepage erosion on the soil resistivity. In addition, by simultaneously turning on the temperature adjustment device 3, the inflow device 4 and the outflow device 5, the coupled action of seepage erosion and environmental temperature change can also be simulated, and further analyze the change law of the resistivity of the soil sample under the coupled action of seepage erosion and environmental temperature change. The system of the present utility model is convenient and flexible in testing operation, the results are true and reliable, and the testing of the soil resistivity under seepage erosion, environmental temperature change and the coupled action of seepage erosion and environmental temperature change can be realized.

[0038] In some possible implementation manners, the temperature adjustment device 3 includes a temperature adjustment air conditioner 31, an air outlet hose 32 and an air inlet hose 33. Among them, the temperature adjustment air conditioner 31 has an air conditioner air outlet port 34 and an air conditioner air inlet port 35, and an air conditioner temperature control valve 36 and an air conditioner flow rate valve 37 are adjacent to each other on the temperature adjustment air conditioner 31. One end of the air outlet hose 32 is connected to the air conditioner air outlet port 34, and a temperature change chamber air inlet 21 is opened at the lower part of one side wall of the temperature change chamber 2. The other end of the air outlet hose 43 is connected to the temperature change cavity through the temperature change chamber air inlet 21. One end of the air inlet hose 33 is connected to the air conditioner air inlet port 35, and a temperature change chamber air outlet 22 is opened at the upper part of the other side wall of the temperature change chamber 2. The other end of the air inlet hose 33 is connected to the temperature change cavity through the temperature change chamber air outlet 22.

[0039] This is because, through temperature regulation, the air conditioner 31 can output cold air or warm air according to the test requirements, so that the air flow flows from the air outlet port 34 of the air conditioner into one end of the air outlet hose 32 connected to the air outlet port 34 of the air conditioner, and then sequentially flows through the other end of the air outlet hose 32 and the temperature change chamber air inlet 21 opened at the lower part of one side wall of the temperature change chamber 2 into the temperature change cavity. Then, the air flow in the temperature change cavity sequentially flows through the temperature change chamber air outlet 22 opened at the upper part of the other side wall of the temperature change chamber 2 and the other end of the air inlet hose 33 into the air inlet hose 33, and then flows from one end of the air inlet hose 33 into the air inlet port 35 of the air conditioner connected to the air inlet hose 33. Thus, a circulating air flow is formed through the air outlet port 34 of the air conditioner, the air outlet hose 32, the temperature change cavity, the air inlet hose 33 and the air inlet port 35 of the air conditioner. The temperature of the air flow can be adjusted by the air conditioner temperature control valve 36 on the temperature regulation air conditioner 31 to adjust the temperature in the temperature change cavity, and the flow rate of the air flow can be adjusted by the air conditioner flow rate valve 37, thereby adjusting the temperature change rate of the temperature change chamber 2, which is used to analyze the influence of environmental temperature change on the resistivity of the soil sample in the seepage cavity.

[0040] In some possible implementation manners, the inflow device 4 includes a booster water pump 41, an inflow pipe 42, a water flow rate meter 43 and a water flow valve 44. Among them, the booster water pump 41 is connected to an external water inlet pipe 9; one end of the inflow pipe 42 is connected to the booster water pump 41, and the other end sequentially passes through one side wall of the temperature change chamber 2, the temperature change cavity, one side wall of the seepage chamber 1 and is connected to the seepage cavity; the water flow rate meter 43 is arranged on the inflow pipe 42; the water flow valve 44 is arranged on the inflow pipe 42 and is arranged adjacent to the water flow rate meter 43. Among them, the booster water pump 41 is a variable power water pump.

[0041] This is because, through the booster water pump 41 connected to the external water inlet pipe 9, the water flow in the external water inlet pipe 9 can enter the inflow pipe 42 from one end of the inflow pipe 42 connected to the booster water pump 41, and sequentially pass through one side wall of the temperature change chamber 2, the temperature change cavity and one side wall of the seepage chamber 1 in the inflow pipe 42, and finally flow into the seepage cavity from the other end of the inflow pipe 42 to convey water source to the soil body in the seepage cavity for seepage simulation experiment. The water flow rate can be monitored by the water flow rate meter 43 arranged on the inflow pipe 42. Different water flow speeds can be achieved by adjusting the power of the booster water pump 41, and continuous testing of the resistivity of the soil body under different seepage effects can be achieved by adjusting the water flow valve 44 arranged on the inflow pipe 42 and adjacent to the water flow rate meter 43. In addition, continuous testing of the resistivity of the soil body under the combined action of different seepage and different environmental temperature changes can be achieved by simultaneously adjusting the water flow valve 44, the air conditioner temperature control valve 36 and the air conditioner flow rate valve 37, and the change law of the resistivity of the soil body under the combined action of seepage and environmental temperature change can be analyzed.

[0042] In some possible embodiments, the outflow device 5 includes an outflow pipe 51 and a water storage tank 52. One end of the outflow pipe 51 is in communication with the seepage cavity; the water storage tank 52 is placed outside the temperature change chamber 2, and the other end of the outflow pipe 51 sequentially passes through the other side wall of the seepage chamber 1, the temperature change cavity, the other side wall of the temperature change chamber 2 and is in communication with the water storage tank 52.

[0043] Those skilled in the art can understand that one end of the outflow pipe 51 is in communication with the seepage cavity, and the other end sequentially passes through the other side wall of the seepage chamber 1, the temperature change cavity, the other side wall of the temperature change chamber 2 and is in communication with the water storage tank 52 placed outside the temperature change chamber 2, so that the water flow in the seepage cavity can flow into the outflow pipe 51 from one end of the outflow pipe 51, then pass through the other side wall of the seepage chamber 1, the temperature change cavity, the other side wall of the temperature change chamber 2 and flow into the water storage tank 52 from the other end of the outflow pipe 51, so as to store the discharged water through the water storage tank 52.

[0044] In some possible embodiments, it further includes: a drying device 8, which is arranged on the inlet pipe 42 and located between the water flow valve 44 and the temperature change chamber 2.

[0045] This is because the drying device 8 is arranged on the inlet pipe 42 and located between the water flow valve 44 and the temperature change chamber 2, and the inside of the inlet pipe 42 can be dried through the drying device 8, and then the inside of the seepage cavity communicated with the inlet pipe 42 can be dried, so as to realize the measurement of the soil resistivity under the action of soil drying and under the combined action of soil drying and environmental temperature change.

[0046] In some possible embodiments, the drying device 8 includes an air flow pipe 81, an air pump 82 and an air flow valve 83. One end of the air flow pipe 81 is in communication with the inlet pipe 42 and is located between the water flow valve 44 and the temperature change chamber 2; the air pump 82 is in communication with the other end of the air flow pipe 81; the air flow valve 83 is arranged on the air flow pipe 81.

[0047] Those skilled in the art can understand that one end of the air flow pipe 81 is connected to the inflow pipe 42 and is located between the water flow valve 44 and the temperature change chamber 2, and the other end is connected to the air pump 82. By turning on the air pump 82, the air flow can pass through the air pump 82, sequentially via the air flow pipe 81 and the inflow pipe 42, into the seepage cavity to blow-dry the soil in the seepage cavity. The drying rate can be controlled by adjusting the air flow valve 83 provided on the air flow pipe 81. During drying, the water storage tank 52 can be removed to allow better gas circulation. By turning on the air pump 82 and the temperature adjustment air conditioner 31, and by adjusting the air conditioner temperature control valve 36, the air conditioner flow rate valve 37, and the air flow valve 83, continuous testing of the soil resistivity under different drying rates and different environmental temperature changes can be achieved, and the variation law of the soil resistivity under the combined action of different drying rates and environmental temperature changes can be analyzed. In addition, in addition to realizing the resistivity test under the coupled action of seepage and environmental temperature change, this system can also realize the resistivity test under the individual actions of factors such as soil seepage, soil drying, and environmental temperature change, thus realizing the function of multi-purpose use of one machine.

[0048] In some possible implementation manners, the seepage chamber 1 includes a seepage chamber body 11, a seepage chamber top plate 12, a first iron screen 13, a second iron screen 14, and four seepage chamber support rods 15. Among them, a first bottom plate slot 111 and a second bottom plate slot 112 are formed at the bottom of the seepage chamber body 11, and the first bottom plate slot 111 and the second bottom plate slot 112 are arranged at intervals along the length direction of the seepage chamber body 11; the seepage chamber top plate 12 is detachably arranged on the top of the seepage chamber body 11 and encloses the seepage space with the seepage chamber body 11. A first sealant is provided at the connection between the seepage chamber top plate 12 and the seepage chamber body 11. A first top plate slot 121 and a second top plate slot 122 are formed on the bottom surface of the seepage chamber top plate 12. The first top plate slot 121 and the first bottom plate slot 111 are located in the same vertical plane, and the second top plate slot 122 and the second bottom plate slot 112 are located in the same vertical plane; the top end of the first iron screen 13 is inserted into the first top plate slot 121, and the bottom end is inserted into the first bottom plate slot 111; the top end of the second iron screen 14 is inserted into the second top plate slot 122, and the bottom end is inserted into the second bottom plate slot 112. The seepage chamber body 11, the seepage chamber top plate 12, the first iron screen 13, and the second iron screen 14 enclose a placement space, and a soil sample is placed in the placement space; the bottom of the seepage chamber body 11 is fixedly connected to the temperature change chamber 2 through four seepage chamber support rods 15. Among them, the seepage chamber body 11 is a rectangular cavity structure, and the four seepage chamber support rods 15 are uniformly fixed in a circumferential direction between the seepage chamber body 11 and the temperature change chamber 2.

[0049] Those skilled in the art can understand that by detachably arranging the seepage chamber top plate 12 on the top of the seepage chamber body 11 and enclosing a seepage space with the seepage chamber body 11, it is convenient to place the soil sample in the seepage space; a first sealant is provided at the connection between the seepage chamber top plate 12 and the seepage chamber body 11, that is, a first sealant is provided along the four peripheral edges of the seepage chamber top plate 12, and after the seepage chamber top plate 12 is buckled into the seepage chamber body 11, the seepage space can be made watertight through the first sealant; a first bottom plate slot 111 and a second bottom plate slot 112 are arranged at intervals along the length direction of the seepage chamber body 11 at the bottom of the seepage chamber body 11, a first top plate slot 121 in the same vertical plane as the first bottom plate slot 111 and a second top plate slot 122 in the same vertical plane as the second bottom plate slot 112 are provided on the bottom surface of the seepage chamber top plate 12, the top and bottom ends of the first iron screen 13 can be respectively inserted into the first top plate slot 121 and the first bottom plate slot 111, and the top and bottom ends of the second iron screen 14 can be respectively inserted into the second top plate slot 122 and the second bottom plate slot 112, so that the first iron screen 13 and the second iron screen 14 are vertically fixed in the seepage space by means of the slots. At this time, the seepage chamber body 11, the seepage chamber top plate 12, the first iron screen 13 and the second iron screen 14 enclose a placement space to place the soil sample in the placement space. Through the first iron screen 13 and the second iron screen 14, it is convenient for water to penetrate through the iron screen into the placement space to generate seepage on the soil sample, thereby simulating the seepage erosion process of the soil mass under real conditions; the bottom of the seepage chamber body 11 is fixedly connected to the temperature change chamber 2 through four seepage chamber support rods 15, and the seepage chamber body 11 can be supported by the four seepage chamber support rods 15 to be fixed inside the temperature change chamber 2.

[0050] In some possible implementation manners, the temperature change chamber 2 includes a temperature change chamber body 23, a temperature change chamber top plate 24 and four temperature change chamber support rods 25. Among them, a temperature change chamber air inlet 21 is provided at the lower part of one side wall of the temperature change chamber body 23, and a temperature change chamber air outlet 22 is provided at the upper part of the other side wall; the temperature change chamber top plate 24 is detachably arranged on the top of the temperature change chamber body 23 and encloses the temperature change space with the temperature change chamber body 23, and a second sealant is provided at the connection between the temperature change chamber top plate 24 and the temperature change chamber body 23; the four temperature change chamber support rods 25 are evenly arranged at the bottom of the temperature change chamber body 23. Among them, the temperature change chamber body 23 is a square cavity structure.

[0051] Those skilled in the art can understand that a temperature-changing chamber air inlet 21 is provided at the lower part of one side wall of the temperature-changing chamber body 23, and a temperature-changing chamber air outlet 22 is provided at the upper part of the other side wall, facilitating the airflow to enter the temperature-changing space formed by enclosing the temperature-changing chamber body 23 and the temperature-changing chamber top plate 24 through the temperature-changing chamber air inlet 21 and discharging from the temperature-changing chamber air outlet 22; the temperature-changing chamber top plate 24 is detachably arranged at the top of the temperature-changing chamber body 23, which is convenient for placing the soil sample in the seepage space inside the temperature-changing space; a second sealant is provided at the connection between the temperature-changing chamber top plate 24 and the temperature-changing chamber body 23, that is, a second sealant is provided along the four peripheral edges of the temperature-changing chamber top plate 24, and after the temperature-changing chamber top plate 24 is buckled into the temperature-changing chamber body 23 through the second sealant, the temperature-changing space is airtight; four temperature-changing chamber support rods 25 are uniformly arranged along the circumferential direction at the bottom of the temperature-changing chamber body 23, and the temperature-changing chamber body 23 can be supported by the four temperature-changing chamber support rods 25.

[0052] In some possible implementation manners, the temperature and humidity detection device 6 includes a temperature and humidity sensor 61, a temperature and humidity tester 62, a temperature and humidity sensing wire harness 63, and four electronic thermometers 64. Among them, the temperature and humidity sensor has a probe end 611 and a transmission end 612. A probe insertion hole is provided on the side wall of the seepage chamber body 11, and the probe insertion hole is located between the first iron screen 13 and the second iron screen 14. The probe end 611 passes through the probe insertion hole and inserts into the soil sample; the temperature and humidity tester 62 is placed outside the temperature-changing chamber body 23; one end of the temperature and humidity sensing wire harness 63 is connected to the transmission end 612, and a wire passing hole 231 is provided at the bottom of the temperature-changing chamber body 23. The other end of the temperature and humidity sensing wire harness 63 passes through the wire passing hole 231 and is connected to the temperature and humidity tester 62; the four electronic thermometers 64 are symmetrically arranged on the two side walls of the temperature-changing chamber body 23. Among them, the probe insertion hole is filled with a quick-drying adhesive material to ensure that the seepage chamber does not leak water.

[0053] This is because a probe insertion hole located between the first iron screen 13 and the second iron screen 14 is provided on the side wall of the seepage chamber body 11. The probe end 611 of the temperature and humidity sensor passes through the probe insertion hole and inserts into the soil sample to monitor the temperature and humidity of the soil sample; one end of the temperature and humidity sensing wire harness 63 is connected to the transmission end 612 of the temperature and humidity sensor, and the other end passes through the wire passing hole 231 provided at the bottom of the temperature change chamber body 23 and is connected to the temperature and humidity tester 62 placed outside the temperature change chamber body 23, so that the temperature and humidity sensor is connected to the temperature and humidity tester 62 through the temperature and humidity sensing wire harness 63 for real-time monitoring of the changes in the temperature and humidity of the soil sample; four electronic thermometers 64 are symmetrically arranged on both side walls of the temperature change chamber body 23. Specifically, two electronic thermometers 64 are arranged at intervals on one side wall of the temperature change chamber body 23, and two electronic thermometers 64 are arranged at intervals on the other side wall of the temperature change chamber body 23, and the change of the temperature in the temperature change chamber can be monitored through the four electronic thermometers 64.

[0054] In some possible implementation manners, the resistivity detection device 7 includes an upper electrode 71, a lower electrode 72, a resistivity tester 73, an upper electrode wire harness 74, and a lower electrode wire harness 75. Among them, the upper electrode 71 is fixed on the bottom surface of the seepage chamber top plate 12 and is located in the placement space; the lower electrode 72 is fixed at the bottom of the seepage chamber body 11 and is located in the placement space; the resistivity tester 73 is placed outside the temperature change chamber body 23; the seepage chamber top plate 12 is provided with a first reserved hole, one end of the upper electrode wire harness 74 passes through the first reserved hole and is connected to the upper electrode 71, and the other end of the upper electrode wire harness 74 passes through the wire passing hole 231 and is connected to the resistivity tester 73; the bottom of the seepage chamber body 11 is provided with a second reserved hole, one end of the lower electrode wire harness 75 passes through the second reserved hole and is connected to the lower electrode 72, and the other end of the lower electrode wire harness 75 passes through the wire passing hole 231 and is connected to the resistivity tester 73. Among them, the wire passing hole 231 is filled with a quick-drying adhesive material to ensure airtightness; the first reserved hole and the second reserved hole are filled with a waterproof adhesive material to ensure that the holes do not leak water.

[0055] Those skilled in the art can understand that the upper electrode 71 is fixed to the bottom surface of the top plate 12 of the seepage chamber and is located within the placement space. One end of the upper electrode wire bundle 74 passes through the first reserved hole opened in the top plate 12 of the seepage chamber and is connected to the upper electrode 71, and the other end passes through the wire passing hole 231 and is connected to the resistivity tester 73 outside the temperature change chamber body 23. The lower electrode 72 is fixed to the bottom of the seepage chamber body 11 and is located within the placement space. One end of the lower electrode wire bundle 75 passes through the second reserved hole opened at the bottom of the seepage chamber body 11 and is connected to the lower electrode 72, and the other end passes through the wire passing hole 231 and is connected to the resistivity tester 73, so as to connect the upper electrode 71 and the lower electrode 72 to the resistivity tester 73 respectively through the upper electrode wire bundle 74 and the lower electrode wire bundle 75, so as to test the resistivity of the soil sample in the placement space in real time.

[0056] The specific test method of the soil resistivity test system under the coupling action of seepage erosion and environmental temperature change in this embodiment is as follows:

[0057] 1. Open the top plate 24 of the temperature change chamber and the top plate 12 of the seepage chamber in sequence. Embed the first iron screen 13 and the second iron screen 14 in the seepage chamber body 11, and then place the soil sample into the placement space.

[0058] 2. Insert the probe end 611 of the temperature and humidity sensor 61 into the soil sample through the probe insertion hole reserved on the front side wall of the seepage chamber body 11, and fill the probe insertion hole with a quick-drying cementing material.

[0059] 3. Fasten the top plate 12 of the seepage chamber and fasten the top plate 24 of the temperature change chamber.

[0060] 4. Connect the temperature and humidity sensor wire bundle 63 to the temperature and humidity tester 62; connect the upper electrode wire bundle 74 and the lower electrode wire bundle 75 to the resistivity tester 73.

[0061] 5. Turn on the temperature and humidity tester 62 and turn on the resistivity tester 73.

[0062] 6. Close the air flow valve 83 and the water flow valve 44; connect the external water inlet pipe 9 to the laboratory tap water, then turn on the booster water pump 41, adjust the water flow valve 44 to let the water flow into the seepage chamber 1 through the inlet pipe 42; at the same time, start the temperature adjustment air conditioner 31, and control the ambient temperature by adjusting the air conditioner temperature control valve 36 and the air conditioner flow rate valve 37, that is, control the temperature change rate of the temperature change chamber 2. The rate of ambient temperature change is mainly monitored by four electronic thermometers 64 arranged on the side wall of the temperature change chamber 2.

[0063] 7. Record the water flow velocity meter 43, calculate the seepage rate of the water flow in the soil mass, synchronously record the temperature and humidity of the soil sample through the temperature and humidity tester 62, and record the resistivity of the soil sample through the resistivity tester 73; according to the test requirements, adjust the seepage rate and the change rate of the ambient temperature, and study the change law of the resistivity of the soil sample under different seepage and different ambient temperature change conditions;

[0064] The system of the present utility model can also be used to study the change law of the resistivity of the soil sample under air flow drying and ambient temperature change. The test operation is as follows: Close the booster water pump 41 and the water flow valve 44. Turn on the air pump 82, open the air flow valve 83, inject air into the seepage chamber 1 to gradually dry the soil sample and reduce the humidity of the soil sample; by adjusting the air flow valve 83, different drying rates of the soil sample can be achieved (the drying rate of the soil sample is calculated by the change amount of the humidity of the soil sample per unit time); control the ambient temperature by adjusting the air conditioner temperature control valve 36 and the air conditioner flow rate valve 37, that is, control the temperature change rate of the temperature change chamber 2; test the temperature and humidity of the soil sample through the temperature and humidity sensor 61, and synchronously test the resistivity of the soil sample through the resistivity tester 73. Through this test, the change law of the resistivity of the soil sample under different drying rates and different ambient temperature changes can be studied.

[0065] Finally, it should be noted that: the above-described embodiments are only specific implementation manners of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model. All should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

[0066] Although the embodiments of the present utility model have been disclosed as above, it is not limited to only the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A soil resistivity testing system under the coupling of seepage erosion and environmental temperature change, characterized in that: include: A seepage chamber having a seepage cavity inside, wherein a soil sample is placed in the seepage cavity; The temperature change chamber has a temperature change cavity inside, and the seepage chamber is placed in the temperature change cavity; A temperature regulating device, connected to the temperature-changing cavity, and used to regulate the temperature in the temperature-changing cavity; An inflow device, one end of which is connected to an external water inlet pipe, and the other end of which passes through a side wall of the temperature change chamber, the temperature change cavity, a side wall of the seepage chamber in sequence and is connected to the seepage cavity; An outflow device, one end of which is connected to the seepage cavity, and the other end of which passes through the other side wall of the seepage chamber, the temperature change cavity, and the other side wall of the temperature change chamber in sequence and is placed outside the temperature change chamber; A temperature and humidity detection device, in contact with the soil sample, and used to detect the temperature and humidity of the soil sample; A resistivity detection device is in contact with the soil sample, and the resistivity detection device is used to detect the resistivity of the soil sample.

2. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 1 is characterized in that: The temperature regulating device comprises: A temperature regulating air conditioner having an air conditioning outlet port and an air conditioning inlet port, wherein an air conditioning temperature control valve and an air conditioning flow rate valve are adjacently arranged on the temperature regulating air conditioner; An air outlet hose, one end of which is connected to the air outlet port of the air conditioner, a temperature change chamber air inlet is provided at the lower part of one side wall of the temperature change chamber, and the other end of the air outlet hose is connected to the temperature change cavity through the temperature change chamber air inlet; An air intake hose has one end connected to the air intake port of the air conditioner, a temperature change chamber air outlet is provided on the upper part of the other side wall of the temperature change chamber, and the other end of the air intake hose is connected to the temperature change cavity through the temperature change chamber air outlet.

3. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 1 is characterized in that: The inlet device comprises: A booster water pump connected to an external water inlet pipe; An inlet pipe, one end of which is connected to the booster water pump, and the other end of which passes through a side wall of the temperature change chamber, the temperature change cavity, a side wall of the seepage chamber in sequence and is connected to the seepage cavity; A water flow rate meter, arranged on the inlet pipe; A water flow valve is arranged on the inlet pipe and adjacent to the water flow rate meter.

4. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 3 is characterized in that: The outflow device comprises: An outlet pipe, one end of which is connected to the seepage cavity; A water storage tank is placed outside the temperature change chamber, and the other end of the outlet pipe passes through the other side wall of the seepage chamber, the temperature change cavity, the other side wall of the temperature change chamber in sequence and is connected to the water storage tank.

5. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 3 is characterized in that: Also includes: The drying device is arranged on the inlet pipe and located between the water flow valve and the temperature change chamber.

6. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 5 is characterized in that: The drying device comprises: An air flow pipe, one end of which is connected to the inlet pipe and is located between the water flow valve and the temperature change chamber; an air pump connected to the other end of the air flow tube; The air flow valve is arranged on the air flow pipe.

7. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 4 is characterized in that: The seepage chamber comprises: The seepage chamber body has a first bottom plate embedding groove and a second bottom plate embedding groove at the bottom, and the first bottom plate embedding groove and the second bottom plate embedding groove are arranged at intervals along the length direction of the seepage chamber body; A seepage chamber top plate is detachably arranged on the top of the seepage chamber body and enclosed with the seepage chamber body to form the seepage cavity, a first sealant is arranged at the connection between the seepage chamber top plate and the seepage chamber body, a first top plate embedding groove and a second top plate embedding groove are opened on the bottom surface of the seepage chamber top plate, the first top plate embedding groove and the first bottom plate embedding groove are located on the same vertical plane, and the second top plate embedding groove and the second bottom plate embedding groove are located on the same vertical plane; A first iron screen, the top end of which is plugged into the first top plate embedding groove, and the bottom end of which is plugged into the first bottom plate embedding groove; A second iron screen, the top end of which is plugged into the second top plate embedding groove, and the bottom end of which is plugged into the second bottom plate embedding groove. The seepage chamber body, the seepage chamber top plate, the first iron screen and the second iron screen are enclosed to form a placement space, and a soil sample is placed in the placement space; Four seepage chamber support rods, the bottom of the seepage chamber body is fixedly connected to the temperature change chamber through the four seepage chamber support rods.

8. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 7 is characterized in that: The temperature change chamber comprises: The temperature change chamber body has an air inlet for the temperature change chamber at the lower part of one side wall and an air outlet for the temperature change chamber at the upper part of the other side wall; A temperature change chamber top plate is detachably arranged on the top of the temperature change chamber body and is enclosed with the temperature change chamber body to form the temperature change space, and a second sealant is arranged at the connection between the temperature change chamber top plate and the temperature change chamber body; Four temperature change chamber support rods, the four temperature change chamber support rods are evenly arranged at the bottom of the temperature change chamber body.

9. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 8 is characterized in that: The temperature and humidity detection device comprises: The temperature and humidity sensor has a probe end and a transmission end. The side wall of the seepage chamber body is provided with a probe insertion hole, the probe insertion hole is located between the first iron sieve and the second iron sieve, and the probe end is inserted into the soil sample through the probe insertion hole; A temperature and humidity tester is placed outside the temperature change chamber body; A temperature and humidity sensing harness, one end of which is connected to the transmission end, a threading hole is provided at the bottom of the temperature change chamber body, and the other end of the temperature and humidity sensing harness passes through the threading hole and is connected to the temperature and humidity tester; Four electronic thermometers are symmetrically arranged on two side walls of the temperature change chamber body.

10. The soil resistivity testing system under the coupling of seepage erosion and environmental temperature change according to claim 9, characterized in that: The resistivity detection device comprises: An upper electrode, fixed to the bottom surface of the top plate of the seepage chamber and located in the placement space; A lower electrode, fixed at the bottom of the seepage chamber body and located in the placement space; A resistivity tester is placed outside the temperature change chamber body; An upper electrode wire bundle, wherein the top plate of the seepage chamber is provided with a first reserved hole, one end of the upper electrode wire bundle passes through the first reserved hole to be connected to the upper electrode, and the other end of the upper electrode wire bundle passes through the threading hole to be connected to the resistivity tester; A lower electrode wire bundle, a second reserved hole is opened at the bottom of the seepage chamber body, one end of the lower electrode wire bundle passes through the second reserved hole to be connected to the lower electrode, and the other end of the lower electrode wire bundle passes through the threading hole to be connected to the resistivity tester.

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