System and method for testing thermosetting and shearing characteristics of non-displacement pile contact interface

Abstract

The invention provides a system and a method for testing thermosetting and shearing characteristics of a non-displacement pile contact interface. The system for testing the thermosetting and shearing characteristics comprises a filter pressing and shearing container, a pressurized grouting and constant pressure device, a pressurization and temperature control device and a shearing loading device. The filter pressing and shearing container comprises a left container main body and a right container main body, and the left container main body and the right container main body are in left-right butt joint and are in sealed connection through a connecting belt to form a filter pressing and shearing cavity; the pressurized grouting and constant pressure device comprises a slurry storage container and a pressure conveyor, and the slurry storage container is communicated with the filter pressing and shearing chamber; the pressure conveyor is communicated with the slurry storage container; the pressurization and temperature control device is arranged on the outer part, close to the left container main body, of the filter pressing and shearing container; and the shear loading device is arranged outside the filter pressing shear container. According to the invention, a reliable experimental means is provided for researching the performance of the non-compaction pile in practical application, and the safety and durability of a building are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation engineering, and in particular to a system and method for testing the thermosetting and shearing characteristics of a contact interface of a non-squeezing pile. Background Art

[0002] As an innovative structure that integrates ground source heat pump technology with traditional pile foundation, energy piles are increasingly receiving widespread attention and application. They use geothermal resources in an environmentally friendly and efficient way to achieve building heating and cooling. In the field of construction, the application of energy piles shows great potential in energy conservation, environmental protection and improving building energy efficiency. However, during the thermal cycle of energy piles, the pile body and the soil around the pile of non-soil-squeezing energy piles will expand and contract with heat, and the soil around the pile may also produce thermal consolidation deformation under the action of temperature stress, which has a great impact on the bearing capacity of non-soil-squeezing energy piles based on pile side grouting (such as drilling and pipe piles, drilling and pipe energy piles, etc.). Therefore, it is very important to explore the influence of energy pile heat exchange on the consolidation deformation of the pile side soil.

[0003] The pile side grouting non-squeezing soil pile represented by the drilling and pipe energy pile has a typical "pile-slurry-soil" contact interface. The thermal consolidation of the soil on the pile side will change the structure and force characteristics of the contact interface, which has a great impact on the friction resistance of the pile side. Effective testing of the "pile-slurry-soil" contact interface is the key to calculating the bearing characteristics of the drilling and pipe energy pile. However, there is currently no special testing equipment to perform performance testing on the shear characteristics of the "pile-slurry-soil" contact interface of non-squeezing soil piles such as the drilling and pipe energy pile, resulting in a lack of reliable experimental basis in the actual application of non-squeezing soil piles, and is also not conducive to the further promotion of non-squeezing soil piles in practical applications. Summary of the invention

[0004] The present invention provides a system and method for testing the thermosetting and shearing characteristics of a non-squeezing soil pile contact interface, which are used to solve the problems existing in the prior art, can more comprehensively simulate the thermosetting and shearing characteristics of a "pile-slurry-soil" contact interface in actual engineering, and provide a reliable experimental means for studying the performance of non-squeezing soil piles in actual applications; and by studying the thermosetting and shearing characteristics of the pile-slurry-soil contact interface, the design and construction process of the pile foundation can be optimized, thereby improving the safety and durability of the building.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a system for testing the thermosetting and shear properties of a non-squeezing pile contact interface, comprising:

[0007] A filter press shear container, comprising a left container body for holding concrete and a right container body for holding soil, wherein the left container body and the right container body are butted against each other and sealedly connected by a connecting belt to form a filter press shear chamber, wherein an S-shaped water pipe is arranged in the left container body;

[0008] The pressurized grouting and constant pressure device comprises a slurry storage container and a pressure conveyor, wherein the slurry storage container is connected to the filter press shear chamber; the pressure conveyor is connected to the slurry storage container and is used to convey air and slurry in the slurry storage container to the filter press shear chamber;

[0009] A pressurizing and temperature control device is arranged outside the filter press shear container near the left container body, the pressurizing and temperature control device is connected with the water inlet and the water outlet of the S-shaped water pipe in the left container body, and the water inlet and the water outlet of the S-shaped water pipe are both arranged on the top wall of the left container body;

[0010] A shear loading device is arranged outside the filter press shear container, and is used to load tangential force and normal force on the right container body, and monitor the displacement of the right container body along the tangential force and normal force directions.

[0011] Furthermore, a plurality of first temperature sensors are provided at the docking interface of the left container body, and the plurality of first temperature sensors are fixedly mounted on the first support frame at equal intervals; a plurality of pore pressure sensors are fixedly mounted on the second support frame at the docking interface of the right container body through a second support frame, and the plurality of pore pressure sensors are fixedly mounted on the second support frame at equal intervals; a displacement monitoring element, a first pressure monitoring element and a drainage hole are provided on the bottom wall of the right container body away from the left container body, the displacement monitoring element is used to monitor the displacement of soil in the filter press shear chamber, the first pressure monitoring element is used to monitor the pressure of soil in the right container body on the container wall in the right container body, and the drainage hole is used for slurry collection and detection.

[0012] Furthermore, a second pressure monitoring element and a regulating valve are provided in the slurry storage container. The regulating valve is arranged on the connecting passage between the slurry storage container and the pressure conveyor. The regulating valve is used to adjust the pressure in the pressurized grouting and constant pressure device.

[0013] Furthermore, the pressurization and temperature control device includes a water storage container and a connecting water pipe. A heating structure is provided in the water storage container. The connecting water pipe passes through the water storage container. The heating structure is arranged on the outer wall of the connecting water pipe in the water storage container. A circulating water pump is provided on the connecting water pipe in the water storage container. Both ends of the connecting water pipe are respectively connected to the water inlet and the water outlet of the S-shaped water pipe to form a closed circulating water circuit.

[0014] Furthermore, the shear loading device includes a fixed frame, a tangential force loading structure and a normal force loading structure, and the tangential force loading structure and the normal force loading structure are both installed on the fixed frame; the tangential force loading structure abuts against a side wall of the right container body, and a tangential force sensor and a shear displacement sensor are also provided on the side wall; the normal force loading structure abuts against the bottom wall of the right container body away from the left container body, and a normal force sensor and a normal displacement sensor are also provided on the bottom wall; the top of the fixed frame is connected and fixed to the top of the left container body through a connecting frame, and a plurality of fixing columns are also provided on the fixed frame, and the plurality of fixing columns are respectively abutted against the side wall of the left container body.

[0015] Furthermore, a plurality of through holes are opened on the top of the filter press shear chamber, including at least a first through hole, a second through hole and a third through hole, wherein the first through hole is used for placing an input pipe of a pressure conveyor; the second through hole is used for exhaust during grouting or for use when the pressure conveyor performs filter press; and the third through hole is used for placing a pressure gauge.

[0016] Furthermore, the thermosetting and shear properties testing system also includes a PIV monitoring device, which is fixed to the outside of the filter press shear container. The camera of the PIV monitoring device is aimed at the entire filter press shear container to observe internal changes of the filter press shear container.

[0017] Furthermore, there are multiple displacement monitoring elements, each of which includes an LVDT displacement meter and a sensor plate. The sensor plate is parallel to the side wall of the right container body and is arranged inside the right container body. The sensor plate is connected to the bottom of the LVDT displacement meter.

[0018] In a second aspect, the present invention provides a method for testing the thermosetting and shearing properties of a non-squeezed soil pile contact interface, based on the above-mentioned thermosetting and shearing properties testing system, comprising the following steps:

[0019] Step S01, manufacturing a left container body, installing an S-shaped water pipe of the left container body and a first sensor;

[0020] Step S02, wrapping the first connecting belt around the docking port of the left container body for one circle, fixing it and sealing the connection;

[0021] Step S03, with the docking port of the left container body facing upward, concrete is filled into the left container body until the concrete is flush with the docking port of the left container body, and then cured at 25°C for 28 days;

[0022] Step S04, making the right container body, installing the displacement monitoring element, the first pressure monitoring element, and the pore pressure sensor of the right container body, wrapping the second connecting belt around the docking interface of the right container body for one circle, fixing it, and sealing the connection; placing the docking interface of the right container body upward, filling the right container body with soil, and using a heavy hammer to compact the soil during the filling process, so that the soil in the right container body is flush with the docking interface of the right container body; at the same time, during the compaction process, opening the valve at the drainage hole to receive the percolation water in the soil;

[0023] Step S05, align the docking interface of the left container body after the maintenance is completed with the docking interface of the right container body after the filling is completed, connect the two ends of the third connecting belt to the first connecting belt and the second connecting belt respectively by bolts, so as to realize the docking connection between the left container body and the right container body, and form a filter press shear chamber at the connection of the connecting belts; an input hole for passing the pressure grouting and constant pressure device input pipe is set at the top of the filter press shear chamber and connected to the pressure grouting and constant pressure device input pipe, an exhaust hole for exhaust or the pressure grouting and constant pressure device input pipe for filter press is set, and a pressure gauge is set at the top of the filter press shear chamber.

[0024] Step S06, before grouting, turn on the PIV monitoring device, aim the camera of the PIV monitoring device at the filter press shear container as a whole, and fix the position of the filter press shear container as a whole and the camera; perform grouting, open the exhaust hole, pressurize the grouting and inject the grouting with pigment in the grout storage container of the constant pressure device into the filter press shear chamber through the pressure conveyor, record the displacement deformation of the displacement detection element during the grouting process, the change of the pore pressure of the pore pressure sensor, and the change value of the soil pressure before and after grouting of the first pressure monitoring element, and collect the seepage water of the soil under the action of grouting through the drainage hole at the right container body;

[0025] Step S07, after the filter press shear chamber is filled with slurry, the exhaust hole is blocked, the filter press shear chamber is sealed, and a constant pressure is applied to the grouting chamber through a pressure conveyor, and a pressure gauge is used for real-time monitoring to perform constant pressure maintenance on the newly injected slurry; at the same time, the percolation water in the soil is collected through the drainage hole at the right container body, and the chemical substances contained in the percolation water of the soil before grouting are compared;

[0026] Step S08, wait for the slurry to completely solidify to obtain a pile-slurry-soil model test block;

[0027] Prepare five identical pile-slurry-soil model test blocks according to steps S01-S07;

[0028] Remove the connection belt, connect the water inlet and outlet of the S-shaped water pipe of the pile-slurry-soil model test block to the pressurization and temperature control device, and pass water at 10℃, 20℃, 30℃, 40℃, and 50℃ into the five pile-slurry-soil model test blocks respectively, and the water is passed for 2 hours;

[0029] Step S09, rotating the pile-slurry-soil model test block so that the right container is at the bottom and vertically upward, and placing the pile-slurry-soil model test block in a shear loading device, so that the tangential force loading structure abuts against the side wall of the right container body, and the normal force loading structure abuts against the bottom of the right container body, the tangential force loading structure and the normal force loading structure provide tangential force and normal force, and the PIV monitoring device records the destruction process of the pile-slurry-soil interface and the intuitive displacement of the pile body or the soil body, and the pore pressure sensor detects the pore pressure inside the soil body. The first pressure monitoring element measures the change in the pressure of the pile-slurry-soil on the soil body under the shear dilatation of the side soil body when the tangential force is applied; the displacement monitoring element measures the displacement of the soil body; at the same time, the percolation water in the soil body is collected to observe the water seepage under the influence of the tangential force on the soil body;

[0030] The maximum shear value of the pile-slurry-soil model specimens after failure at five different temperatures was recorded and finally analyzed;

[0031] S10: After the pile-slurry-soil model specimen is destroyed, the soil part infected by the pigment is excavated and the remaining uninfected part is retained to observe the penetration effect of the slurry on the soil.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The thermosetting and shearing characteristics testing system in the present invention can more comprehensively simulate the thermosetting and shearing characteristics of the "pile-slurry-soil" contact interface in actual engineering through the synergistic effect of the filter press shear container, the pressure grouting and constant pressure device, the pressurization and temperature control device and the shear loading device, and provide a reliable experimental means for studying the performance of non-squeezing piles in practical applications. And by studying the thermosetting and shearing characteristics of the pile-slurry-soil contact interface, the design and construction process of the pile foundation can be optimized, and the safety and durability of the building can be improved. The present invention can collect data of multiple parameters such as temperature, displacement, pressure, pore water pressure, etc. through various monitoring elements, providing rich data support for in-depth research on the characteristics of the "pile-slurry-soil" contact interface.

[0034] In addition, the coordinated work of various systems reduces human errors during the experiment and improves the efficiency and accuracy of the experiment. The sealed connection and precise monitoring components of the device can ensure the stability and reliability of the experimental conditions, providing a guarantee for obtaining accurate experimental results; this technical solution can provide a scientific basis for the design, construction and performance evaluation of non-squeezing piles, and help improve the application level and market competitiveness of green energy utilization technologies such as energy piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of the left container body and the right container body after docking in the thermosetting and shearing property testing system of a specific embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of the main structure of the left container in the thermosetting and shearing properties testing system of a specific embodiment of the present invention;

[0038] Figure 3 It is a structural schematic diagram of the left container body after being filled with concrete in the thermosetting and shearing property testing system of a specific embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the main structure of the right container in the thermosetting and shearing properties testing system of a specific embodiment of the present invention;

[0040] Figure 5 It is a schematic structural diagram of the right container body after the soil is contained in the thermosetting and shearing property testing system according to a specific embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the grouting structure after the left container body and the right container body are butted against each other in the thermosetting and shearing property testing system of a specific embodiment of the present invention;

[0042] Figure 7 It is a schematic diagram of the structure after grouting is completed in the thermosetting and shearing property testing system of a specific embodiment of the present invention;

[0043] Figure 8 It is a schematic diagram of the structure of connecting the left container body and the right container body with the pressurizing and temperature control device in a vertical state in a method for testing thermosetting and shearing properties in a specific embodiment of the present invention;

[0044] Fig. 9 It is a schematic diagram of the connection structure between the pile-slurry-soil model test block and the shear loading device according to a specific embodiment of the present invention.

[0045] Wherein: 1. left container body; 10. S-shaped water pipe; 101. water inlet; 102. water outlet; 11. first temperature sensor; 12. first support frame;

[0046] 2. right container body; 20. displacement monitoring element; 21. first pressure monitoring element; 22. drainage hole; 23. hole pressure sensor; 24. second support frame;

[0047] 3. Pressure grouting and constant pressure device; 30. Slurry storage container; 31. Pressure conveyor;

[0048] 4. Pressurization and temperature control device; 40. Water storage container; 41. Connecting water pipe; 42. Circulating water pump; 43. Heating structure;

[0049] 5. Shear loading device; 50. Fixed frame; 51. Tangential force loading structure; 52. Normal force loading structure; 53. Connecting frame; 54. Fixed column;

[0050] 61, first through hole; 62, second through hole; 63, third through hole;

[0051] 7. Slurry collection and detection device; 8. Filter press shear chamber 102. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "top", "bottom", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0054] The present embodiment discloses a system and method for testing the thermosetting and shearing properties of a non-squeezing soil pile contact interface, which is used to solve the problems existing in the prior art. The present embodiment takes the "pile-slurry-soil" contact interface of a non-squeezing soil pile as an example. Figure 1 To Attachment Fig. 9 The invention is discussed in detail with specific embodiments so as to be able to more comprehensively simulate the thermosetting and shearing characteristics of the "pile-slurry-soil" contact interface in actual engineering, and provide a reliable experimental means for studying the performance of non-squeezing soil piles in practical applications; and by studying the thermosetting and shearing characteristics of the pile-slurry-soil contact interface, the design and construction process of the pile foundation can be optimized, thereby improving the safety and durability of the building.

[0055] On the one hand, the present invention provides a thermosetting and shear characteristics testing system for the contact interface of a non-soil-squeezing pile, comprising: a filter press shear container, a pressure grouting and constant pressure device 3, a pressurizing and temperature control device 4 and a shear loading device 5. Among them, the filter press shear container comprises a left container body 1 for holding concrete and a right container body 2 for holding soil. The left container body 1 and the right container body 2 are butt-jointed on the left and right and sealedly connected by a connecting belt to form a filter press shear chamber, which is used to hold slurry. An S-shaped water pipe 10 is provided in the left container body 1. The S-shaped water pipe 10 is fixed in the left container body by a plurality of fixing frames. The water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 are both arranged on the top wall of the left container body 1. The S-shaped water pipe 10 is used to hold media of different temperatures to verify the influence of different temperatures on the pile body in the left container body 1.

[0056] A plurality of first temperature sensors 11 are provided at the interface of the left container body 1. The plurality of first temperature sensors 11 are arranged on the same first support frame 12 and fixed to the interface of the left container body 1 through the first support frame 12. In this embodiment, the first temperature sensor 11 is arranged beside the S-shaped water pipe 10, the first support frame 12 is parallel to the axis of the S-shaped water pipe 10, and three first temperature sensors 11 are arranged at equal intervals to monitor the temperature of the concrete in the left container body 1. By providing a plurality of first temperature sensors 11, the temperature of the concrete at different heights in the left container body 1 can be more comprehensively understood. Since the concrete may have uneven temperature in the container, the plurality of first temperature sensors 11 can capture the temperature changes at different heights, avoiding the problem of inaccurate local temperature monitoring that may be caused by only providing one first temperature sensor 11. At the same time, the temperature change trend of the concrete at different heights over time can be observed, which is very helpful for studying the temperature conduction, heat diffusion and other characteristics of the concrete during the heat exchange process, and provides more detailed data for in-depth understanding of the performance changes of the pile under different temperature conditions.

[0057] In this embodiment, the connecting water pipe 41 is a stainless steel pipe with a diameter of 2 cm, which has a good heat transfer effect. The circulating water pump 42 uses a high-power high-flow rate circulating water pump 42 with a power of 200W and a flow rate of 2m3 / h. The circulating water pump 42 can ensure that the water flow rate reaches 5cm / s, so that the water can achieve a good heat transfer or cooling effect on the thermal consolidation effect inside the pile body in the left container body 1. A plurality of pore pressure sensors 23 are provided at the docking interface of the right container body 2; a displacement monitoring element 20 for monitoring the displacement of the soil in the filter press shear chamber, a first pressure monitoring element 21 for monitoring the pressure of the soil in the right container body 2 on the container wall in the right container body 2, and a drainage hole 22 for slurry collection and detection are provided on the bottom wall of the right container body 2 away from the left container body 1. A slurry collection and detection device 7 is installed at the drainage hole 22 of the right container body 2. The slurry collection and detection device 7 is a steel funnel, which is fixed to the drainage hole 22 by bolts, etc., and is used to collect percolation water in the soil. A valve is provided at the bottom of the steel funnel to control the outflow of the water stored in the funnel. At the same time, a soft water pipe is used to drain the water in the steel funnel to the water quality detector. The water quality detector can monitor the substances contained in the water after the natural soil is compacted, and can also monitor the new mixed solution formed after the slurry is injected into the soil. By comparing the exudate solution before and after the natural soil is compacted, the type and content of the chemical substances in it can be analyzed. This is of great significance for studying the interaction between the slurry and the soil, the changes in the physical and chemical properties of the soil, and the performance of the pile-slurry-soil contact interface.

[0058] In this embodiment, multiple displacement monitoring elements 20 are provided, and each displacement monitoring element 20 includes an LVDT displacement meter and a sensing piece. The sensing piece is parallel to the side wall of the right container body 2 and is arranged inside the right container body 2, and the sensing piece is connected to the bottom of the LVDT displacement meter. In this embodiment, three small circular holes with a diameter of about 5 mm are reserved on the side wall of the right container body 2 for placing the LVDT displacement meter. The bottom of the LVDT displacement meter penetrates into the side wall of the right container body 2, and the sensing piece is connected to the bottom of the LVDT displacement meter. The displacement monitoring element 20 can simultaneously monitor the displacement of the soil in the filter press shear chamber at different heights. Since the displacement of the soil under pressure may be different at different heights, multiple displacement monitoring elements 20 can more comprehensively reflect the displacement changes of the soil as a whole, avoiding the limitations of single position monitoring. The three small circular holes are arranged at equal intervals along the height direction of the right container body 2. The equal interval arrangement can make the monitoring data more representative and help analyze the distribution law of soil displacement in the vertical direction.

[0059] In order to further fix the displacement monitoring element 20 and avoid displacement deviation, the LVDT displacement meter needs to be fixedly connected to the right container body by hot melt adhesive to prevent the position deviation of the LVDT displacement meter and cause reading errors. The induction sheet is preferably an iron sheet, which is arranged parallel to the side wall of the right container body 2. The area of ​​the iron sheet is about 4cm2 and the thickness is about 2mm. It is used to monitor the displacement of the soil in the filter press shear chamber. On the one hand, the induction sheet increases the contact area with the soil, so that the displacement monitoring can better reflect the actual displacement of the soil; on the other hand, the induction sheet is arranged parallel to the right side wall of the right container body 2, which helps to keep the measurement direction of the LVDT displacement meter consistent with the displacement direction of the soil, further improving the accuracy of monitoring.

[0060] In this embodiment, the first pressure monitoring element 21 is preferably a pressure sensor, which is fixed to the inner wall of the right container body 2 by hot melt adhesive, and three pressure sensors are provided, which are arranged at equal intervals from top to bottom along the height direction of the right container body 22, and are used to monitor the pressure of the soil in the right container body 22 on the filter press shear container wall. The three pressure sensors can monitor the pressure of the soil in the right container body 22 on the filter press shear container wall at different heights. The pressure of the soil on the container wall may vary in the vertical direction. Multiple pressure sensors can fully understand the distribution of soil pressure and provide more detailed data for analyzing the mechanical behavior of the soil in the filter press shear process.

[0061] The pressurized grouting and constant pressure device 3 comprises a slurry storage container 30 and a pressure conveyor 31. The slurry storage container 30 is connected to the filter press shear chamber; the pressure conveyor 31 is connected to the slurry storage container 30 and is used to convey air and the slurry in the slurry storage container 30 to the filter press shear chamber. The slurry storage container 30 is provided with a second pressure monitoring element and a regulating valve for adjusting the pressure in the pressurized grouting and constant pressure device 33. The regulating valve is arranged on the connecting channel between the slurry storage container (30) and the pressure conveyor. The second pressure monitoring element is used to monitor the pressure value inside the pressurized grouting and constant pressure device 3. Specifically, the pressure conveyor 31, the slurry storage container 30, and the filter press shear chamber are connected in sequence. In this embodiment, the pressure conveyor 31 can be an air compressor. When no slurry is placed in the slurry storage container 30, starting the pressure conveyor 31 can input air into the filter press shear chamber to increase the pressure in the filter press shear chamber. When slurry is put into the slurry storage container 30, the pressure conveyor 31 is started to inject slurry into the filter press shear chamber and maintain a certain pressure.

[0062] The pressurizing and temperature control device 4 is arranged outside the filter press shear container near the left container body 1, and the pressurizing and temperature control device 4 is connected to the water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 in the left container body 1. Specifically, the pressurizing and temperature control device 4 includes a water storage container 40 and a connecting water pipe 41. A heating structure is arranged in the water storage container 40 to heat the water flow in the circulating water circuit; the connecting water pipe 41 passes through the water storage container 40, and the heating structure is arranged on the outer wall of the connecting water pipe 41 in the water storage container 40. The two ends of the connecting water pipe 41 are respectively connected to the water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 to form a closed circulating water circuit. The pressurizing and temperature control device 4 adjusts the water temperature in the S-shaped water pipe 10, so as to know the influence of different water temperatures on the pile performance in the left container body 1.

[0063] In this embodiment, a circulating water pump 42 is provided on the connecting water pipe 41 in the water storage container 40, and its function is to accelerate the water circulation. The water storage container 40 is filled with recyclable water, which can reduce energy loss and improve the stability of the water temperature of the equipment and the flow rate of water. In this embodiment, the capacity of the water storage container 40 is 40L. In this embodiment, a heating structure is provided on the connecting water pipes 41 on both sides of the circulating water pump 42 in the water storage container 40. In this application, the heating structure is preferably a 25W carbon fiber heating wire 43, which has high conversion efficiency and a small load on the pressurization and temperature control device 4 for long-term use, which meets the experimental requirements. The shear loading device 5 is arranged outside the filter press shear container, and is used to load the tangential force and the normal force on the right container body 2, and monitor the displacement of the right container body 2 along the tangential force and the normal force direction. The shear loading device 5 includes a fixed frame 50, a tangential force loading structure 51 installed on the fixed frame 50, and a normal force loading structure 52 installed on the fixed frame 50; the tangential force loading structure 51 abuts against the side wall of the right container body 2, and a tangential force sensor and a shear displacement sensor are also provided on the side wall; the normal force loading structure 52 abuts against the bottom wall of the right container body 2 away from the left container body 1, and a normal force sensor and a normal displacement sensor are also provided on the bottom wall; the top of the left container body 1 is connected to the top of the fixed frame 50 of the shear loading device 5 through a connecting frame, and a plurality of fixing columns 54 are also provided on the fixed frame 50, and the fixing columns 54 abut against the side wall of the left container body 1 for fixing the left container body 1.

[0064] The tangential force sensor, shear displacement sensor, normal force sensor and normal displacement sensor are set to monitor the magnitude of the tangential force and normal force and the displacement of the right container body 2 in the corresponding direction in real time, which provides accurate data for studying the mechanical behavior of the pile-slurry-soil interface under the action of shear and normal forces. At the same time, by monitoring the changes in displacement and stress, the deformation, strength characteristics and failure mode of the pile-slurry-soil interface at different loading stages can be understood, providing a basis for evaluating the stability and reliability of the interface.

[0065] In this embodiment, the tangential force loading structure 51 and the normal force loading structure 52 are both jacks, which are respectively a jack arranged horizontally and a jack arranged longitudinally. The jacks can provide a stable and controllable loading force. By adjusting the pressure of the jacks, the magnitude of the tangential force and the normal force applied to the right container body 2 can be accurately controlled to meet the requirements of different experimental conditions. At the same time, the jack is a common loading device with relatively simple operation. The experimenter can easily adjust the pressure of the jack to achieve control of different loading levels and improve the operability and efficiency of the experiment.

[0066] The thermosetting and shearing characteristics testing system of the present invention can simulate the thermosetting and shearing characteristics of the "pile-slurry-soil" contact interface in actual engineering more comprehensively through the synergistic effect of the filter press shear container, the pressure grouting and constant pressure device 3, the pressure and temperature control device 4 and the shear loading device 5, and provides a reliable experimental means for studying the performance of non-squeezing soil piles in practical applications. And by studying the thermosetting and shearing characteristics of the pile-slurry-soil contact interface, the design and construction process of the pile foundation can be optimized, and the safety and durability of the building can be improved.

[0067] At the same time, the first temperature sensor 11 in the left container body 1 can accurately monitor the temperature change of the concrete slurry, which is helpful to study the influence of temperature on the performance of the pile body and provide data support for optimizing the design and construction of energy piles. The displacement monitoring element 20 and the first pressure monitoring element 21 on the right container body 2 can respectively monitor the displacement of the soil body and the pressure of the soil body on the container wall, providing key data for analyzing the deformation and stress characteristics of the soil body around the pile during thermal consolidation and shearing. The pore pressure sensor 23 in the right container body 2 can monitor the pore pressure of the soil body, which is of great significance for studying the changes in pore water pressure of the soil body during thermal consolidation and shearing. The second pressure monitoring element in the pressurized grouting and constant pressure device 3 can monitor the pressure value inside the system, which is convenient for accurately controlling the grouting pressure and ensuring the accuracy and repeatability of the experimental conditions. And the regulating valve in the pressurized grouting and constant pressure device 3 can adjust the pressure in the system, which can simulate the performance changes of the pile-slurry-soil contact interface under different grouting pressure conditions, and provide a basis for optimizing the design and construction of energy piles. By using the pressurization and temperature control device 4 to adjust the water temperature in the water pipe, the performance changes of the pile body under different temperature environments can be simulated, and the thermosetting characteristics of the energy pile under different working temperatures can be studied.

[0068] It can be seen that the present invention can collect data of various parameters, such as temperature, displacement, pressure, pore water pressure, etc. through various monitoring elements, providing rich data support for in-depth research on the characteristics of the "pile-slurry-soil" contact interface.

[0069] In addition, the coordinated work of various systems reduces human errors during the experiment and improves the efficiency and accuracy of the experiment. The sealed connection and precise monitoring components of the device can ensure the stability and reliability of the experimental conditions, providing a guarantee for obtaining accurate experimental results; this technical solution can provide a scientific basis for the design, construction and performance evaluation of non-squeezing piles, and help improve the application level and market competitiveness of green energy utilization technologies such as energy piles.

[0070] In the present embodiment, the left container body 1 and the right container body 2 are detachably fixedly connected. The first connecting belt, the second connecting belt, and the third connecting belt provided at the joint of the left container body 1 and the right container body 2 are preferably rubber sealing belts. The two ends of the third connecting belt are respectively connected to the first connecting belt and the second connecting belt by bolts to realize the sealed fixed connection between the left container body 1 and the right container body 2. Specifically, the rubber sealing belt surrounds the joint of the left and right container bodies 2 for at least one week. The connecting belt and the container body can be bonded with hot melt adhesive, and adjacent rubber sealing belts can be fixed with bolts. The rubber sealing belt surrounds the joint of the left and right container bodies 2 for at least one week, which can form a good sealing effect to prevent liquid or gas leakage during the experiment, thereby ensuring the accuracy and stability of the experimental conditions. In the present embodiment, three through holes are provided on the top of the filter press shear chamber formed by the rubber sealing belt joint. The first through hole 61 is used to place the input pipe of the pressure conveyor 31; the second through hole 62 is used for exhaust during grouting or when the pressure conveyor 31 is used for pressure filtration, and the second through hole 62 can be sealed with hot melt adhesive; the third through hole 63 is used to place the pressure gauge, and the through hole 63 can be sealed with hot melt adhesive after the pressure gauge is installed. After the pressure grouting and constant pressure device are removed, the first through hole 61 and the second through hole 62 need to be sealed.

[0071] In this embodiment, the left container body 1 and the right container body 2 are both made of transparent acrylic plates, so that the outside world can directly observe through the acrylic plates whether the soil inside the filter press shear chamber is compacted or the progress of the filter press process.

[0072] The thermosetting and shearing property testing system also includes a PIV monitoring device, which is arranged outside the filter press shearing container. The PIV monitoring device includes a tripod and a camera mounted on the tripod, which is used to shoot and record dynamic changes in the filter press shearing container.

[0073] During use, adjust the tripod to the same height as the middle of the filter press shear container, and then fix the tripod on the ground to prevent the tripod from moving, ensuring that the tripod remains stable during shooting and will not shake due to slight external forces, so as to ensure that the camera can stably shoot the situation inside the container. Avoid touching the tripod during shooting, because even a slight touch may cause the camera to shake, which will affect the accuracy and clarity of the shooting results.

[0074] The camera should have a standby time of more than 10 hours and a memory card capacity of more than 64GB. This can meet the needs of long-term shooting, without frequent interruptions to deal with power or storage problems, ensuring that the entire process from the beginning to the complete shearing of the test block can be fully recorded. After turning on the camera, fix the camera on the tripod and remotely control the camera through the Bluetooth remote control. This is convenient for operation and reduces the impact of human proximity on shooting stability. Ten photos are taken every time the shear strength increases by one level and the force is stable. These photos can be used for later PIV software analysis, which can record in detail the changes in the pile-slurry-soil interface under different shear strengths. Through the comparative analysis of multiple groups of photos, the development trend of interface damage during the shearing process can be more accurately observed. Continuous shooting until the test block is completely sheared and destroyed and the final form of damage is recorded can provide intuitive and comprehensive image data for studying the thermosetting and shearing characteristics of the pile-slurry-soil interface, which is helpful for in-depth analysis of the interface's damage mechanism and performance change law.

[0075] Preferably, the thermosetting and shear properties testing system of the present invention also includes a data collection and processing module, which includes a data collector and a computer. The data collector is connected to the filter press shear container, the pressure grouting and constant pressure device 3, the pressurization and temperature control device 4, the shear loading device 5, the slurry collection and detection device 7 and the PIV monitoring device through multiple 5-meter-long data connection lines. The data collector is also connected to the computer to uniformly transmit the collected data information to the computer, and the computer performs data processing uniformly.

[0076] With the help of the unique software of each device, these devices can be controlled separately for on-off operation and data collection and processing. The software used includes Origin software and PIVview2CDemo software. After installing the Origin software on the computer, set the compressive strength, constant pressure strength, heating speed, and constant temperature to the preset values, and the shear value can be integrated with the pore pressure value and soil displacement value of the soil to form a three-dimensional graph. After installing the PIVview2CDemo software on the computer, import the photos in the camera into the same folder, and by comparing every two pictures and continuously projecting the comparison pictures, a dynamic picture of the pile-slurry-soil interface from the intact state to the damaged state can be generated. Finally, the dynamic picture can be edited by a computer to form a video of the whole process of the formation of the damaged interface.

[0077] In a second aspect, the present invention provides a method for testing the thermosetting and shearing properties of a non-squeezed soil pile contact interface, based on the above-mentioned thermosetting and shearing properties testing system, comprising the following steps:

[0078] Step S01, manufacturing a left container body 1, installing an S-shaped water pipe 10 and a first sensor of the left container body 1;

[0079] In this embodiment, two unsealed cube-shaped transparent acrylic boxes of the same size and sufficient strength are used as the outer shells of the left container body 1 and the right container body 2, respectively, as shear boxes for casting models and shear tests. The transparent acrylic box as the left container body 1 has two circular holes with the same diameter as the S-shaped water pipe 10 reserved on the bottom wall away from the right container body 2, so that the water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 made of PC plastic material can be passed through the reserved circular holes, and the S-shaped water pipe 10 is fixed in the left container body 1 by an iron frame and bolts, and then the water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 are sealed and fixed to the circular holes to prevent the water pipe from shifting. Next, the first temperature sensor 11 is fixedly installed at the docking interface of the left container body 1 through a support rod, and the first temperature sensor 11 is connected to the data collection and processing module through a data connection line.

[0080] Step S02, wrapping the first connecting belt around the docking port of the left container body 1 for at least one circle, fixing it and sealing the connection;

[0081] The first connecting belt is a detachable rubber sealing belt that can surround the acrylic box interface for at least one circle. The rubber sealing belt has the same thickness as the acrylic box and is placed between two oppositely arranged acrylic boxes to facilitate pouring concrete and placing soil, as well as to facilitate forming a shear pile-slurry-soil interface protruding from the acrylic plate.

[0082] Step S03, with the docking port of the left container body 1 facing upward, the left container body 1 is filled with concrete, the concrete needs to fill the left container body 1, that is, be flush with its docking port surface, and be cured at 25°C for 28 days;

[0083] In this embodiment, the mixed concrete with a water-cement ratio of 0.3 and a strength of C80 is poured into the outer shell of the left container body 1 using an auxiliary container, and vibrated to reduce the bubbles therein; and after pouring for 2 to 4 hours, the concrete surface is continuously, evenly, and non-strongly sprayed with water mist using a sprinkler pool to ensure that the water covers the concrete surface and avoids water accumulation; the above operation is continued and cured at 25°C for 28 days.

[0084] Step S04, making the right container body 2, installing the displacement monitoring element 20, the first pressure monitoring element 21, and the pore pressure sensor 23 of the right container body 2, and fixing the second connecting belt after wrapping around the docking interface of the right container body 2 for one circle and sealing the connection; placing the docking interface of the right container body 2 upward, filling the right container body 2 with soil, and using a heavy hammer to compact the soil during the filling process, and the soil in the right container body 2 needs to be flush with the docking interface surface of the right container body; at the same time, during the compaction process, opening the valve at the drainage hole 22 to receive the percolation water in the soil;

[0085] Three small circular holes are opened on the side wall of the transparent acrylic box serving as the right container body 2, all of which are used for the displacement monitoring element 20. An LVDT displacement meter is placed in the circular hole and fixed by hot melt adhesive. The bottom of the LVDT displacement meter is located inside the right container body 2. Correspondingly, an iron sheet with an area of ​​4cm2 and a thickness of 2mm is welded on the bottom of each LVDT displacement meter. The side wall of the right container body 2 on the same side as the displacement monitoring element 20 is fixed with glue to three first pressure monitoring elements 21, i.e., pressure sensors. The three pressure sensors are arranged at equal intervals along their height direction. At the same time, at the docking interface of the right container body 2, a plurality of orifice pressure sensors 23 are fixed by a second support frame 24, and the orifice pressure sensors are fixedly installed on the second support frame 24 at equal intervals;

[0086] 25 circular holes arranged in a 5*5 matrix are opened at the lower right corner of the right container body 2, with a hole diameter of 2mm and a spacing of 2cm between adjacent circular holes as drainage holes 22, and a steel funnel is welded outside the drainage hole 22. A valve is provided at the bottom of the steel funnel to control the outflow of water stored in the funnel; the rubber sealing belt is wrapped around the right container body 2 docking interface for at least one week and fixed with hot melt adhesive, and the LVDT displacement meter, the first pressure monitoring element 21, and the pore pressure sensor 23 are connected to the data collection and processing module through a data connection line. Then, the opening of the right container body 2 is facing upward, and the soil is loaded into the right container body 2, and a heavy hammer is used to compact it during the filling process; at the same time, during the compaction process, the valve at the bottom of the steel funnel is opened, and the container is used to receive the seepage in the soil.

[0087] During the compaction process, the water inside the soil that seeps out of the small holes is collected, and a water quality detector is used to conduct a preliminary analysis of its internal chemical composition. In this way, it can be compared whether the change in the chemical properties of the soil around the slurry-soil interface under the penetration of the slurry into the soil during grouting has an effect on improving the bearing capacity of the slurry-soil interface.

[0088] Step S05, the docking interface of the left container body 1 after curing is aligned with the docking interface of the right container body 2 after filling is completed, and the first connecting belt and the second connecting belt are connected by the third connecting belt and the connection is sealed to realize the docking connection between the left container body 1 and the right container body 2, and a filter press shear chamber is formed at the connection; an input hole for passing the input pipe of the pressurized grouting and constant pressure device 3 is set at the top of the filter press shear chamber and the input pipe of the pressurized grouting and constant pressure device 3 is connected, an exhaust hole for exhaust or the input pipe of the pressurized grouting and constant pressure device 3 is set for filter press, and a pressure gauge is set at the top of the filter press shear chamber.

[0089] Step S06, before grouting, turn on the PIV monitoring device, aim the camera of the PIV monitoring device at the filter press shear container as a whole, and fix the position of the filter press shear container as a whole and the camera; perform grouting, open the exhaust hole, pressurize the grouting and the constant pressure device 3, and inject the grouting with pigment in the grout storage container 30 into the filter press shear chamber through the pressure conveyor 31, record the displacement deformation of the displacement detection element during the grouting process, the change of the pore pressure of the pore pressure sensor 23, and the change value of the soil pressure of the pressure sensor before and after grouting, and collect the water seepage of the soil under the action of grouting through the drainage hole 22 at the right container body 2;

[0090] In this step, the water seeping from the soil under the action of grouting can be collected in time and put into the water quality detector for analysis, and compared with the chemical composition of the natural water seeping from the soil, to observe whether the grouting liquid has a reinforcing effect on the surrounding soil; during the grouting process, the PIV monitoring device takes pictures to analyze the penetration effect of the grouting liquid on the soil.

[0091] Step S07, after the filter press shear chamber is filled with slurry, the vent hole is blocked to seal the filter press shear chamber, and a constant pressure is applied to the grouting chamber through the pressure conveyor 31, and a pressure gauge is used for real-time monitoring to maintain the newly injected slurry under constant pressure; at the same time, the percolation water in the soil is collected through the drainage hole 22 at the right container body 2, and the chemical substances contained in the percolation water of the soil before grouting are compared;

[0092] In this embodiment, the pressure conveyor 31 applies a constant pressure effect of 5 MPa to the grouting chamber.

[0093] While waiting for the grouting liquid to solidify, continuously collect the seepage water in the soil and compare it with the chemical substances contained in the previous seepage water of the natural soil to analyze whether the grouting body has a chemical reaction on the surrounding soil. If there is a chemical reaction, analyze the material changes and whether the new material has an improvement effect on the bearing capacity of the soil around the slurry-soil interface.

[0094] Step S08, wait for the slurry to completely solidify to obtain a pile-slurry-soil model test block;

[0095] Prepare five identical pile-slurry-soil model test blocks according to steps S01-S07;

[0096] Remove the connection belt, connect the water inlet 101 and the water outlet 102 of the S-shaped water pipe 10 of the pile-slurry-soil model test block to the pressurization and temperature control device 4, and use the pressurization and temperature control device 4 to push, cool and heat the circulating water in the water pipe to achieve the temperature control effect. Water at 10°C, 20°C, 30°C, 40°C and 50°C is introduced into the five pile-slurry-soil model test blocks respectively, and the water is introduced for 2 hours, and the influence on the pile body temperature is analyzed by the first temperature sensor 1111 in the left container body 1;

[0097] Step S09, the pile-slurry-soil model test block is rotated so that the right container is at the bottom and vertically upward, and the pile-slurry-soil model test block is placed in the shear loading device 5, so that the tangential force loading structure 51 abuts against the side wall of the right container body 2, and the normal force loading structure 52 abuts against the bottom of the right container body 2, and the tangential force loading structure 51 and the normal force loading structure 52 provide tangential force and normal force, and the PIV monitoring device records the destruction process of the pile-slurry-soil interface and the intuitive displacement of the pile body or the soil body, and the pore pressure sensor 23 detects the pore pressure inside the soil body. The pressure sensor measures the change in the pressure of the pile-slurry-soil on the soil body under the shear dilatation of the side soil body when the tangential force is applied; the displacement monitoring element 20 measures the displacement of the soil body; at the same time, the percolation water in the soil body is collected to observe the water seepage under the influence of the tangential force on the soil body;

[0098] The maximum shear value of the pile-slurry-soil model specimens after failure at five different temperatures was recorded and finally analyzed;

[0099] S10: After the pile-slurry-soil model specimen is destroyed, the soil part infected by the pigment is excavated and the remaining uninfected part is retained to observe the penetration effect of the slurry on the soil.

[0100] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for testing the thermosetting and shearing properties of the contact interface of a non-squeezed soil pile, characterized in that: It comprises a filter press shear container, a pressure grouting and constant pressure device (3), a pressure and temperature control device (4) and a shear loading device (5), wherein: A filter press shear container, comprising a left container body (1) for containing concrete and a right container body (2) for containing soil, wherein the left container body (1) and the right container body (2) are butted against each other and sealedly connected via a connecting belt to form a filter press shear chamber, wherein an S-shaped water pipe (10) is provided in the left container body (1), and a water inlet (101) and a water outlet (102) of the S-shaped water pipe (10) are both arranged on the top wall of the left container body (1); The pressurized grouting and constant pressure device (3) comprises a slurry storage container (30) and a pressure conveyor (31), wherein the slurry storage container (30) is connected to the filter press shear chamber; the pressure conveyor (31) is connected to the slurry storage container (30) and is used to convey air and slurry in the slurry storage container (30) to the filter press shear chamber; A pressurizing and temperature control device (4) is arranged outside the filter press shear container on a side close to the left container body (1), and the pressurizing and temperature control device (4) is connected to the water inlet (101) and the water outlet (102) of the S-shaped water pipe (10) in the left container body (1); the water inlet (101) and the water outlet (102) of the S-shaped water pipe (10) are both arranged on the top wall of the left container body; The shear loading device (5) is arranged outside the filter press shear container and is used to load tangential force and normal force on the right container body (2) and monitor the displacement of the right container body (2) along the direction of the tangential force and the normal force.

2. A thermosetting and shearing properties testing system for a non-squeezing pile contact interface as claimed in claim 1, characterized in that: A plurality of first temperature sensors (11) are fixed at the docking interface of the left container body (1) via a first support frame (12), and the plurality of first temperature sensors (11) are fixedly mounted on the first support frame (12) at equal intervals; a plurality of pore pressure sensors (23) are fixedly mounted on the second support frame (24) at the docking interface of the right container body (2) via a second support frame (24), and the plurality of pore pressure sensors (23) are fixedly mounted on the second support frame (24) at equal intervals; a displacement monitoring element (20), a first pressure monitoring element (21) and a drainage hole (22) are provided on the bottom wall of the right container body (2) away from the left container body (1), the displacement monitoring element (20) being used to monitor the displacement of soil in the filter press shear chamber, the first pressure monitoring element (21) being used to monitor the pressure of soil in the right container body (2) on the container wall of the right container body (2), and the drainage hole (22) being used to collect and detect slurry.

3. A thermosetting and shearing property testing system for a non-squeezing soil pile contact interface as claimed in claim 1, characterized in that: The slurry storage container (30) is provided with a second pressure monitoring element and a regulating valve. The regulating valve is arranged on a connection channel between the slurry storage container (30) and a pressure conveyor. The regulating valve is used to adjust the pressure in the pressurized grouting and constant pressure device (3).

4. A thermosetting and shearing property testing system for a non-squeezing soil pile contact interface as claimed in claim 1, characterized in that: The pressurizing and temperature control device (4) comprises a water storage container (40) and a connecting water pipe (41). A heating structure is provided in the water storage container (40). The connecting water pipe (41) passes through the water storage container (40). The heating structure is arranged on the outer wall of the connecting water pipe (41) in the water storage container (40). A circulating water pump (42) is provided on the connecting water pipe (41) in the water storage container (40). The two ends of the connecting water pipe (41) are respectively connected to the water inlet (101) and the water outlet (102) of the S-shaped water pipe (10) to form a closed circulating water circuit.

5. The thermosetting and shearing properties testing system for the contact interface of a non-squeezed soil pile according to claim 1, characterized in that: The shear loading device (5) comprises a fixing frame (50), a tangential force loading structure (51) and a normal force loading structure (52); the tangential force loading structure (51) and the normal force loading structure (52) are both mounted on the fixing frame (50); the tangential force loading structure (51) abuts against a side wall of the right container body (2); a tangential force sensor and a shear displacement sensor are also provided on the side wall; the normal force loading structure (52) abuts against a bottom wall of the right container body (2) away from the left container body (1); a normal force sensor and a normal displacement sensor are also provided on the bottom wall; the top of the fixing frame (50) is connected and fixed to the top of the left container body (1) via a connecting frame; a plurality of fixing columns (54) are also provided on the fixing frame (50); the plurality of fixing columns (54) abut against the side wall of the left container body (1) respectively.

6. A thermosetting and shearing property testing system for a non-squeezing soil pile contact interface as claimed in claim 1, characterized in that: The top of the filter press shear chamber is provided with a plurality of through holes, including at least a first through hole (61), a second through hole (62) and a third through hole (63); the first through hole (61) is used for placing an input pipe of a pressure conveyor (31); the second through hole (62) is used for exhausting air during grouting or for use when the pressure conveyor (31) is performing filter press; and the third through hole (63) is used for placing a pressure gauge.

7. A thermosetting and shearing property testing system for a non-squeezing soil pile contact interface as claimed in claim 1, characterized in that: The system also includes a PIV monitoring device, which is fixed to the outside of the filter press shear container. The camera of the PIV monitoring device is aimed at the entire filter press shear container to observe the internal changes of the filter press shear container.

8. A system for testing the thermosetting and shearing properties of a non-squeezed soil pile contact interface as claimed in claim 2, characterized in that: The displacement monitoring element (20) comprises an LVDT displacement meter and a sensing plate, wherein the sensing plate is parallel to the side wall of the right container body (2) and is arranged inside the right container body (2), and the sensing plate is connected to the bottom of the LVDT displacement meter.

9. A method for testing the thermosetting and shear properties of a non-squeezed soil pile contact interface, characterized in that: The thermosetting and shearing properties testing system according to any one of claims 1 to 8 comprises the following steps: Step S01, manufacturing a left container body (1), installing an S-shaped water pipe (10) and a first sensor of the left container body (1); Step S02, wrapping the first connecting belt around the docking port of the left container body (1) for one circle, fixing it and sealing the connection; Step S03, with the docking port of the left container body (1) facing upwards, concrete is filled into the left container body (1) until the concrete is flush with the docking port of the left container body, and then cured at 25°C for 28 days; Step S04, manufacturing the right container body (2), installing the displacement monitoring element (20), the first pressure monitoring element (21), and the pore pressure sensor (23) of the right container body (2), wrapping the second connecting belt around the docking interface of the right container body (2) for one circle, fixing it, and sealing the connection; placing the docking interface of the right container body (2) upward, filling the right container body (2) with soil, and using a heavy hammer to compact the soil during the filling process, so that the soil in the right container body (2) is flush with the docking interface of the right container body (2); at the same time, during the compaction process, opening the valve at the drainage hole (22) to receive the percolation water in the soil; Step S05, align the docking interface of the left container body (1) after curing with the right container body (2) after filling, connect the two ends of the third connecting belt to the first connecting belt and the second connecting belt respectively by bolts, so as to realize the docking connection between the left container body (1) and the right container body (2), and form a filter press shear chamber at the connection; an input hole for passing the input pipe of the pressure grouting and constant pressure device (3) is set at the top of the filter press shear chamber and connected to the input pipe of the pressure grouting and constant pressure device (3), and an exhaust hole is set for exhaust or the input pipe of the pressure grouting and constant pressure device (3) is used for filter press, and a pressure gauge is set at the top of the filter press shear chamber; Step S06, before grouting, turn on the PIV monitoring device, aim the camera of the PIV monitoring device at the filter press shear container as a whole, and fix the positions of the filter press shear container as a whole and the camera; perform grouting, open the exhaust hole, and inject the grouting containing pigment in the grouting storage container (30) of the pressurized grouting and constant pressure device (3) into the filter press shear chamber through the pressure conveyor (31), record the displacement deformation of the displacement detection element during the grouting process, the change of the pore pressure of the pore pressure sensor (23), and the change value of the soil pressure before and after grouting of the first pressure monitoring element (21), and at the same time collect the seepage water of the soil under the action of grouting through the drainage hole (22) at the right container body (2); Step S07, after the filter press shear chamber is filled with slurry, the exhaust hole is blocked, the filter press shear chamber is sealed, and a constant pressure is applied to the grouting chamber through a pressure conveyor (31), and a pressure gauge is used for real-time monitoring to maintain the newly injected slurry at a constant pressure; at the same time, the percolation water in the soil is collected through the drainage hole (22) at the right container body (2), and the chemical substances contained in the percolation water of the soil before grouting are compared; Step S08, wait for the slurry to completely solidify to obtain a pile-slurry-soil model test block; Prepare five identical pile-slurry-soil model test blocks according to steps S01-S07; The connection belt is removed, and the water inlet (101) and the water outlet (102) of the S-shaped water pipe (10) of each pile-slurry-soil model test block are connected to the pressurizing and temperature control device (4); Step S09, rotating the pile-slurry-soil model test block so that the right container is at the bottom and vertically upward, and placing the pile-slurry-soil model test block in the shear loading device (5), so that the tangential force loading structure (51) abuts against the side wall of the right container body (2), and the normal force loading structure (52) abuts against the bottom of the right container body (2), the tangential force loading structure (51) and the normal force loading structure (52) provide tangential force and normal force, and the PIV monitoring device records the destruction process of the pile-slurry-soil interface and the intuitive displacement of the pile body or the soil body, the pore pressure sensor (23) detects the pore pressure inside the soil body, the first pressure monitoring element (21) measures the change in the pressure of the pile-slurry-soil on the soil body under the shear dilatation of the side soil body when the tangential force is applied; the displacement monitoring element (20) measures the displacement of the soil body; at the same time, the percolation water in the soil body is collected to observe the water seepage under the influence of the tangential force on the soil body; The maximum shear value of the pile-slurry-soil model specimens after failure at five different temperatures was recorded and finally analyzed; S10: After the pile-slurry-soil model specimen is destroyed, the soil part infected by the pigment is excavated and the remaining uninfected part is retained to observe the penetration effect of the slurry on the soil.

10. A method for testing the thermosetting and shearing properties of a non-squeezing pile contact interface as claimed in claim 9, characterized in that: The five pile-slurry-soil model test blocks in step S08 are respectively introduced into water at 10° C., 20° C., 30° C., 40° C., and 50° C., and the water introduction time is 2 hours.

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