Self-adjusting soaking device for batch geotechnical material multi-field coupling test

Abstract

The utility model provides a self-adjusting soaking device for a batch geotechnical material multi-field coupling test. The self-adjusting soaking device comprises a liquid storage tank, a solution external circulation device and a cylinder body for accommodating geotechnical materials, wherein the solution external circulation device comprises a machine body communicated with the liquid storage tank and a water pump communicated with the machine body and the cylinder body, a liquid outlet of the water pump is communicated with a liquid injection port of the cylinder body through a liquid injection pipe, and a liquid outlet of the cylinder body is communicated with a liquid return port of the machine body through a liquid return pipe; a heating device is arranged in the machine body and is used for heating a solution in the machine body; the cylinder body is provided with a sealing cover plate. With the adoption of the mode, the self-adjusting soaking device for the batch multi-field coupling test of the geotechnical materials, provided by the utility model, has the advantages that the geotechnical materials to be tested can be always under the condition of constant ion concentration and constant temperature in the soaking process; research on geotechnical materials under the condition of three-field coupling of a temperature field, a seepage field and a chemical corrosion field is realized, and the accuracy of an experimental result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering, in particular to a self-regulating immersion device for multi-field coupling tests of batch geotechnical materials. Background Art

[0002] The study of mechanical properties and stability of geotechnical materials such as rocks and concrete has always been a research hotspot in construction projects such as mining, civil engineering, and water conservancy. With the gradual increase in depth, engineering geological conditions have become increasingly harsh, and geotechnical materials are exposed to a more complex "three highs and one disturbance" environment. The rise of coastal projects such as coastal mines and submarine nuclear power plants has also made the chemical corrosion of seawater on surrounding rocks become more serious. The high salt and oxygen-rich environments in seawater are the direct causes of its high corrosiveness. Under the influence of the above factors, more serious engineering disasters have been induced, such as large deformation of surrounding rocks, roof collapse, deflection and water inrush, which have posed a huge potential threat to engineering safety and caused a sharp increase in engineering costs. Therefore, the performance research of geotechnical materials should not be limited to a single environmental field. It is particularly important to study the performance of geotechnical materials under multi-field coupling conditions such as temperature field-seepage field-chemical corrosion field.

[0003] At present, domestic and foreign scholars mainly use indoor experiments to study the mechanism of geotechnical materials under multi-field coupling conditions, and the experimental equipment is usually relatively simple. Most of them directly immerse the geotechnical materials in a heatable chemical solution pool to simulate the erosion of seawater on geotechnical materials under different environments. However, in the actual experimental process, the evaporation of the solution due to heat will cause the ion concentration in the chemical solution pool to increase, and the variable control of the ion concentration cannot be achieved, and thus the erosion of seawater on the surrounding rock in the actual situation cannot be restored, causing large errors in the results. In addition, the experimental process is inconvenient to operate, and only a small batch of samples can be tested each time, with many repeated processes, resulting in a long experimental cycle.

[0004] In view of this, it is necessary to design an improved self-adjusting immersion device for multi-field coupling testing of batch geotechnical materials to solve the above problems. Utility Model Content

[0005] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a self-adjusting immersion device for multi-field coupling testing of batch rock and soil materials, so as to solve the problems existing in the existing test devices, such as uncontrollable ion concentration, inconvenient operation, large experimental errors, etc., to realize the study of rock samples under multi-field coupling conditions and ensure the accuracy of experimental results.

[0006] To achieve the above-mentioned purpose, the utility model provides a self-regulating immersion device for multi-field coupling testing of batch geotechnical materials, comprising a liquid storage tank, a solution external circulation device, and a cylinder body for accommodating geotechnical materials; the solution external circulation device comprises a body connected to the liquid storage tank and a water pump connected to the body and the cylinder body, the liquid outlet of the water pump is connected to the liquid injection port of the cylinder body through an injection pipe, and the liquid outlet of the cylinder body is connected to the liquid return port of the body through a return pipe; a heating device is provided in the body for heating the solution in the body; and the cylinder body is provided with a sealing cover plate.

[0007] As a further improvement of the utility model, a plurality of rock sample pads are arranged at intervals at the bottom of the inner cavity of the cylinder.

[0008] As a further improvement of the utility model, the sealing cover plate is arranged on the top of the cylinder body, and a rock sample pressing block is arranged at the bottom of the sealing cover plate at a position opposite to the rock sample cushion block.

[0009] As a further improvement of the utility model, a plurality of detection probes for collecting solution information are arranged in the cylinder body.

[0010] As a further improvement of the present invention, a display screen connected to the detection probe signal is provided on the surface of the body.

[0011] As a further improvement of the utility model, the liquid storage tank includes a distilled water liquid storage tank and an experimental solution liquid storage tank.

[0012] As a further improvement of the utility model, a concentration regulating device connected to the distilled water storage tank and the experimental solution storage tank is arranged in the body.

[0013] As a further improvement of the utility model, the water pump is connected to a flow rate regulating device, and the flow rate regulating device includes a flow rate indicator, a pressure indicator and a flow rate controller.

[0014] As a further improvement of the utility model, a first throttle valve is provided on the liquid injection pipe.

[0015] As a further improvement of the utility model, a second throttle valve is provided on the liquid return pipe.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a self-regulating immersion device for batch geotechnical material multi-field coupling test. By arranging a solution external circulation device, the liquid in the liquid storage tank is heated and the concentration is adjusted in the body of the solution external circulation device to form an experimental solution with constant temperature and concentration; then the liquid is injected into the cylinder body through a water pump, and flows back into the body of the solution external circulation device through the liquid outlet of the cylinder body to form a solution circulation, which ensures that the geotechnical material in the cylinder body can always be under the condition of constant ion concentration and temperature, realizes the study of the geotechnical material under the three-field coupling condition of temperature field-seepage field-chemical corrosion field, improves the accuracy of the experimental results, and lays a reliable foundation for the performance study of the geotechnical material under the multi-field coupling condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of a self-adjusting immersion device for multi-field coupling testing of batch geotechnical materials.

[0019] Figure 2 The utility model is a working schematic diagram of a self-adjusting immersion device for multi-field coupling testing of batch geotechnical materials.

[0020] Reference numerals

[0021] 1-distilled water storage tank; 11-distilled water; 2-experimental solution storage tank; 21-experimental solution; 3-machine body; 31-liquid return port of the machine body; 32-display screen; 33-temperature adjustment panel; 34-concentration adjustment panel; 4-water pump; 41-liquid outlet of the water pump; 42-flow rate indicator; 43-pressure indicator; 44-flow rate controller; 45-immersion solution; 5-liquid injection pipe; 51-first throttle valve; 6-cylinder body; 61-liquid injection port of the cylinder body; 62-liquid outlet of the cylinder body; 63-sealing cover plate; 64-rock sample pressing block; 65-rock sample pad; 66-detection probe; 7-liquid return pipe; 71-second throttle valve; 8-rock sample. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0024] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0025] like Figure 1-2 As shown, the utility model provides a self-regulating immersion device for batch geotechnical material multi-field coupling test, including a liquid storage tank, a solution external circulation device, and a cylinder body 6 for accommodating geotechnical materials. Among them, the solution external circulation device includes a body 3 connected to the liquid storage tank and a water pump 4 connected to the body 3 and the cylinder body 6, the liquid outlet 41 of the water pump is connected to the liquid injection port 61 of the cylinder body through the liquid injection pipe 5, and the liquid outlet 62 of the cylinder body is connected to the liquid return port 31 of the body through the liquid return pipe 7. In this way, the liquid in the liquid storage tank enters the body 3, and can be injected into the cylinder body 6 through the liquid injection pipe 5 under the action of the water pump 4, and then the solution output from the cylinder body 6 is returned to the body 3 by the liquid return pipe 7, thereby forming an external circulation of the solution to ensure that the concentration of the solution in the cylinder body 6 is stable and unchanged, thereby improving the accuracy of the experimental results.

[0026] More specifically, in some embodiments of the present invention, a heating device is further provided in the body 3 for heating the solution in the body 3. The heating device is an existing conventional temperature-adjustable heating device, including a heating element, a temperature measuring element and a temperature regulating element, preferably a heating device with a temperature regulating panel 33, and the temperature regulating panel 33 is provided on the surface of the body 3 for temperature regulation. At the same time, the cylinder 6 is provided with a sealing cover plate 63, and the material of the cylinder 6 is preferably a heat-insulating and corrosion-resistant material.

[0027] With such an arrangement, the temperature of the solution can be effectively regulated, so that a solution of a specific temperature can be injected into the cylinder 6 to treat the rock and soil materials. The temperature of the solution in the cylinder 6 is kept stable through the thermal insulation effect of the cylinder 6 and the circulation of the solution, thereby forming a temperature field and a seepage field. When the solution used is chemically corrosive, a chemical corrosion field can also be formed, thereby realizing the study of the rock and soil materials under the coupled conditions of the temperature field, the seepage field and the chemical corrosion field during the experiment.

[0028] Specifically, in different embodiments of the utility model, the number of liquid storage tanks and the liquid components in the liquid storage tanks can be freely selected according to actual needs. For example, if it is only necessary to study the effect of water immersion on geotechnical materials, only one distilled water storage tank 1 containing distilled water 11 can be set; if it is only necessary to study the effect of immersion of an experimental solution of a certain concentration on geotechnical materials, only one experimental solution storage tank 2 containing an experimental solution 21 can be set; if it is necessary to study the effect of immersion of experimental solutions of different concentrations on geotechnical materials, a distilled water storage tank 1 containing distilled water 11 and an experimental solution storage tank 2 containing an experimental solution 21 can be set at the same time, and then the concentration of the solution can be adjusted by using the concentration regulating device set in the body 3, so as to obtain the required concentration of the immersion solution 45 for the corresponding immersion experiment. Among them, the distilled water storage tank 1 and the experimental solution storage tank 2 are arranged on the top of the body 3. When the corresponding valves are opened, the solutions in the storage tanks can enter the inner cavity of the body 3; the concentration regulating device is an existing conventional concentration regulating device, and the concentration of the solution can be regulated by adjusting the flow ratio of the distilled water 11 and the experimental solution 21. It includes a valve element, a concentration detection element, and a concentration regulating element respectively connected to the distilled water storage tank 1 and the experimental solution storage tank 2. Preferably, the concentration regulating device has a concentration regulating panel 34, and the concentration regulating panel 34 is set on the surface of the body 3 to adjust the concentration of the solution.

[0029] In the above manner, the immersion solution 45 with the required temperature and concentration can be formed in the body 3 by adjusting the temperature adjustment panel 33 and the concentration adjustment panel 34 on the body 3, and based on the circulation effect of the solution external circulation device, it is ensured that the rock sample 8 is always under the conditions of constant ion concentration and temperature during the experiment, thereby ensuring the accuracy of the experimental results and laying a reliable foundation for the study of the mechanical properties of rocks under multi-field coupling conditions.

[0030] The circulation function of the solution external circulation device is mainly driven by the water pump 4. The immersion solution 45 in the body 3 is discharged from the liquid outlet 41 of the water pump through the water pump 4, and then enters the liquid injection port 61 of the cylinder body through the liquid injection pipe 5 to perform an immersion experiment on the rock sample 8 in the cylinder body 6; at the same time, the immersion solution 45 in the cylinder body 6 will also flow out from the liquid outlet 62 of the cylinder body, and then flow back to the body 3 through the return pipe 7, completing the external circulation of the solution.

[0031] In the above process, in order to more effectively control the water pump 4, in some embodiments of the utility model, the water pump 4 is preferably connected to a flow rate regulating device. The flow rate regulating device is an existing conventional device capable of regulating the flow rate of the water pump, preferably a flow rate regulating device including a flow rate indicator 42, a pressure indicator 43 and a flow rate controller 44, so as to more accurately control the pumping flow rate of the water pump 4.

[0032] More specifically, in some embodiments of the utility model, in order to facilitate the pumping of the high-temperature immersion solution 45 in the body 3, a high-temperature resistant water pump is preferably used; the water pump 4 can be arranged at the bottom of the body 3, and the injection port of the water pump 4 is connected to the inner cavity of the body 3 through a heat-insulating and corrosion-resistant pipe; the injection pipe 5 and the return pipe 7 are preferably made of heat-insulating and corrosion-resistant materials, and a first throttle valve 51 is provided on the injection pipe 5, and a second throttle valve 52 is provided on the return pipe 7, so as to open or close the corresponding pipeline passage as needed.

[0033] In some embodiments of the utility model, a plurality of rock sample pads 65 are arranged at intervals at the bottom of the inner cavity of the cylinder body 6, a sealing cover plate 63 is arranged at the top of the cylinder body 6, a rock sample pressing block 64 is arranged at the bottom of the sealing cover plate 63 opposite to the rock sample pad 65, and the rock sample 8 used for the experiment is placed between the rock sample pad 65 and the rock sample pressing block 64. With such an arrangement, multiple rock samples 8 can be placed simultaneously in one experiment to conduct batch experiments; by placing the rock sample 8 on the rock sample pad 65 and then covering it with the sealing cover plate 63, the rock sample pad 65 and the rock sample pressing block 64 can be used to fix the rock sample 8 together to prevent it from shifting under the scouring and immersion of the soaking solution 45, so as to ensure the smooth progress of the experiment. Among them, the sealing cover plate 63 is preferably made of a material with a certain counterweight so as to effectively fix the rock sample 8.

[0034] In some embodiments of the utility model, a plurality of detection probes 66 for collecting solution information can be arranged in the area between the rock samples 8 inside the cylinder body 6 as required. The detection probe 66 can be a temperature detection probe, an ion concentration detection probe, or other required detection probes can be selected according to the needs of the experiment. The utility model does not involve the improvement of the detection probe itself, and the existing detection probe can be used to perform real-time detection of relevant information of the immersion solution 45 in the cylinder body. More preferably, a display screen connected to the detection probe 66 signal is also arranged on the surface of the body 3, so as to intuitively display the detection results of the detection probe 66.

[0035] In the above manner, the soaking solution 45 of the required temperature and concentration can be injected into the cylinder 6 for experiments using the solution external circulation device, and the temperature and concentration of the soaking solution 45 in the cylinder are monitored during the experiment so that adjustments can be made as needed, thereby accurately controlling the temperature and concentration of the soaking solution 45 to improve the accuracy of the experimental results.

[0036] Taking a specific embodiment as an example, the specific experimental method of the self-adjusting immersion device for batch geotechnical material multi-field coupling test provided by the utility model is described below:

[0037] Use as Figure 1When conducting an experiment with the self-adjusting immersion device shown for multi-field coupling tests of batch geotechnical materials, the sealing cover 63 is first opened, and then the rock sample 8 is placed on the rock sample pad 65, and then the sealing cover 63 is covered, so that the rock sample pressing block 64 is pressed onto the rock sample 8 to complete the fixation of the rock sample 8.

[0038] Then screw one end of the injection pipe 5 onto the liquid outlet 41 of the water pump, and screw the other end onto the injection port 61 of the cylinder body; screw one end of the return pipe 7 onto the liquid outlet 62 of the cylinder body, and screw the other end onto the return port 31 of the body; then close the first throttle valve 51 on the injection pipe 5 and the second throttle valve 71 on the return pipe 7 to complete the connection of the pipelines.

[0039] Fill the distilled water storage tank 1 with distilled water 11, fill the experimental solution storage tank 2 with the experimental solution 21, and screw the filled distilled water storage tank 1 and the experimental solution storage tank 2 on the top of the machine body 3 respectively. Then turn on the solution external circulation device, set the temperature and ion concentration required for the experiment through the heating device and the concentration adjustment device, and form the required soaking solution 45 in the machine body 3; then set the flow rate of the water pump 4 through the flow rate adjustment device, turn on the water pump 4, the first throttle valve 51 and the second throttle valve 71, so that the soaking solution 45 in the machine body 3 enters the cylinder 6 through the water pump 4 and the injection pipe 5, and then flows back to the machine body 3 through the return pipe 7. By observing the data measured by the detection probe 66 in the cylinder 6, start timing when it is confirmed that the temperature and concentration of the soaking solution 45 in the cylinder tend to be stable. After reaching the required experimental time, turn off the solution external circulation device, close the first throttle valve 51 and the second throttle valve 71, open the sealing cover plate 63, take out the rock sample 8, and the experiment is completed.

[0040] In summary, the utility model provides a self-regulating immersion device for multi-field coupling test of batch geotechnical materials, including a liquid storage tank, a solution external circulation device, and a cylinder 6 for accommodating geotechnical materials; wherein the solution external circulation device includes a body 3 connected to the liquid storage tank and a water pump 4 connected to the body 3 and the cylinder 6, the liquid outlet of the water pump 4 is connected to the liquid injection port 61 of the cylinder through the liquid injection pipe 5, and the liquid outlet 62 of the cylinder is connected to the liquid return port 31 of the body through the liquid return pipe 7; a heating device is provided in the body 3 for heating the solution in the body; and the cylinder 6 is provided with a sealing cover plate 63. In the above manner, the self-regulating immersion device for multi-field coupling test of batch geotechnical materials provided by the utility model can make the geotechnical materials to be tested always under the condition of constant ion concentration and temperature during the immersion process, realize the study of geotechnical materials under the three-field coupling conditions of temperature field-seepage field-chemical corrosion field, and improve the accuracy of the experimental results.

[0041] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A self-adjusting immersion device for multi-field coupling testing of batch geotechnical materials, characterized in that: It includes a liquid storage tank, a solution external circulation device, and a cylinder body for accommodating geotechnical materials; the solution external circulation device includes a body connected to the liquid storage tank and a water pump connected to the body and the cylinder body, the liquid outlet of the water pump is connected to the liquid injection port of the cylinder body through a liquid injection pipe, and the liquid outlet of the cylinder body is connected to the liquid return port of the body through a liquid return pipe; a heating device is arranged in the body for heating the solution in the body; and the cylinder body is provided with a sealing cover plate.

2. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1 is characterized in that: A plurality of rock sample pads are arranged at intervals at the bottom of the inner cavity of the cylinder.

3. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 2 is characterized in that: The sealing cover plate is arranged on the top of the cylinder body, and a rock sample pressing block is arranged at a position of the bottom of the sealing cover plate opposite to the rock sample cushion block.

4. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1 is characterized in that: The cylinder body is provided with a plurality of detection probes for collecting solution information.

5. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 4 is characterized in that: The surface of the machine body is provided with a display screen which is connected to the detection probe signal.

6. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1 is characterized in that: The liquid storage tank comprises a distilled water liquid storage tank and an experimental solution liquid storage tank.

7. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 6 is characterized in that: The body is provided with a concentration regulating device connected with the distilled water storage tank and the experimental solution storage tank.

8. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1 is characterized in that: The water pump is connected to a flow rate regulating device, which includes a flow rate indicator, a pressure indicator and a flow rate controller.

9. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1 is characterized in that: The liquid injection pipe is provided with a first throttle valve.

10. The self-adjusting immersion device for multi-field coupling test of batch geotechnical materials according to claim 1, characterized in that: The liquid return pipe is provided with a second throttle valve.

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