A test method for the interfacial mechanical properties of reinforced materials

Abstract

This invention discloses a test method for the interfacial mechanical properties of reinforced materials. The test method utilizes a slope reinforced material interface simulation device, which can simulate different construction geological environments and set up shear molds with different combinations for testing. Through a control and display terminal connected to a pressurization system, traction system, pressure sensor, tension sensor, and displacement sensor, the device controls the pressurization and tension parameters and monitors pressure, tension, and displacement data in real time during the test. This data is used to calculate the friction coefficient under different interfacial states. This method can provide reliable simulation data for the durability design of reinforced materials under specific slope structural morphologies and the safe service life of existing reinforced soil flexible support structures. It is simple to operate and widely adaptable.

Description

Technical Field

[0001] This invention relates to the field of soil performance testing technology. More specifically, this invention relates to a test method for the interfacial mechanical properties of reinforced materials. Background Technology

[0002] The main testing methods for the interfacial mechanical properties of reinforced soil include direct shear tests and pull-out tests. Direct shear tests are generally conducted using a direct shear apparatus. The shear strength of soil is the ultimate resistance to shear when one part of the soil slides against another part under external force. This test involves applying horizontal shear force directly along a fixed shear plane to several samples of the same soil under different vertical pressures to obtain the shear stress at failure. Then, according to Coulomb's law, the soil's shear strength index, internal friction angle, and cohesion are determined. Specifically, the soil sample is placed in a shear box, the upper box is fixed, and the lower box can slide horizontally. First, a vertical pressure is applied, and then horizontal shear force is applied to the lower box in stages until the sample fails. However, current testing instruments can only test the interaction between the upper and lower soil layers. In actual slope environments, the interaction between the layered reinforced soil filler layers is more complex, and the slope has a certain gradient. Existing testing methods are insufficient to reflect the actual working conditions. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] Another objective of this invention is to provide a test method for the interfacial mechanical properties of reinforced materials, in order to solve the technical problem that the direct shear test in the prior art has too large a gap with the actual mechanical environment of the slope.

[0005] To achieve these objectives and other advantages according to the present invention, a test method for the interfacial mechanical properties of reinforced materials is provided, employing a slope reinforced material interface simulation device. The slope reinforced material interface simulation device includes:

[0006] The table has a horizontally positioned upper surface. A support platform is set on the table. The upper surface of the support platform is also horizontal. A pair of protruding limiting strips are set parallel to each other on the support platform. The limiting strips extend along the length of the support platform and form a guide area between the pair of limiting strips.

[0007] Shear test box, comprising multiple C-shaped test boxes stacked vertically, the C-shaped test boxes being horizontally positioned on a guide area, the width of the C-shaped test box being equal to the spacing between a pair of limiting strips and being able to slide freely relative to the limiting strips, the open end of the C-shaped test box being detachably connected to an interface module to form a circumferentially closed test box, the inside of the test box being used to place a layer of soil sample, or a reinforcement strip sample and a soil sample.

[0008] The pressurization system is mounted on a table and has a pressurization end with a pressure sensor. The pressurization end is located above the guide area and is used to apply the required pressure to the soil sample directly below.

[0009] The traction system is mounted on the table and located on the side facing away from the opening of the C-shaped mold box. The traction system has multiple traction ends horizontally arranged facing the shear mold box. Each traction end is connected to a C-shaped mold box and is used to control the movement of the C-shaped mold box in the extension direction of the limit strip. The traction system is equipped with a tension sensor, and the table is also equipped with a displacement sensor corresponding to the traction end to detect the displacement of the corresponding C-shaped mold box driven by the traction end.

[0010] The control and display terminal is connected to the pressurization system, traction system, pressure sensor, tension sensor, and displacement sensor respectively, and is used to control the operation of the pressurization system and traction system respectively, and to acquire data from the pressure sensor, tension sensor, and displacement sensor.

[0011] The test method includes the following steps:

[0012] S1. Stack the C-shaped molds and interface modules in layers, and put the soil and reinforcement samples of the corresponding layer into the test box, keeping all C-shaped molds in the same vertical position;

[0013] S2. Apply downward pressure to the soil using a pressurization system;

[0014] S3. Apply tension to the corresponding layer of the shear formwork using the traction system, obtain the traction force through the corresponding displacement sensor and tension sensor, and calculate the friction coefficient of the reinforcing material interface using the traction force.

[0015] Prior to this, a heating and humidification system is also included. The heating and humidification system includes a heat insulation cover covering the outside of the support platform and the shear mold box, and temperature and humidity sensors installed on the support platform. The temperature and humidity sensors are respectively connected to the control and display terminal to detect the corresponding temperature or humidity around the shear mold box. The heat insulation cover corresponds to the traction system. The pressurization system is provided with channel holes. At least one side of the heat insulation cover is transparent. A conduit group is connected to the bottom of one side of the heat insulation cover. Hot gas is introduced or heat exchange gas is discharged through the conduit group. In step S1, after the test box is arranged, the heat insulation cover is set, and heating or humidifying gas is introduced to the corresponding sensor to achieve the corresponding data, thus completing the test environment setup.

[0016] Preferably, the height of the C-shaped mold box is equal to the height of the interface module. The two ends of the C-shaped mold box are provided with multiple pairs of vertical ridges, one pair of which is located at the end edge of the C-shaped mold box. The width of the interface module is equal to the distance between the two ends of the C-shaped mold box. The interface module has an inclined surface at one end and a vertical surface at the other end in the length direction. Multiple pairs of vertical slots are symmetrically opened on both sides in the width direction of the interface module. The vertical slots are provided in conjunction with the vertical ridges. The spacing between adjacent pairs of vertical ridges is equal to the horizontal width of the inclined surface.

[0017] When testing the mechanical properties of multiple interfaces of a soil sample, the vertical surface of the interface module is facing the inside of the C-shaped mold box, and the vertical groove is aligned downward and inserted into the vertical edge to form a rectangular space for accommodating the soil sample in the test box.

[0018] By aligning the inclined surface of the interface module with the inside of the C-shaped mold box and inserting it downwards into the vertical ridge, an inverted trapezoidal space for accommodating soil samples is formed inside the test box.

[0019] When the inclined surfaces of two adjacent interface modules face the inside of the C-shaped mold, the upper interface module is staggered relative to the lower interface module and inserted on the vertical edge that is farther away from the inside of the C-shaped mold, forming an inverted trapezoidal space that is spliced ​​up and down on the inside of the two C-shaped molds.

[0020] Preferably, a groove is provided on the tabletop along the length of the limiting strip, and multiple fixing holes are provided on the outside of the groove on the tabletop. A slider is fixed downward at the bottom of the support platform. The slider is located in the groove and can slide along the groove to move the support platform and align the different pressurization positions required for the soil sample directly below the pressurization system. A screw hole is provided through the end of the support platform. Bolts are screwed into the fixing holes and screw holes at the corresponding positions to fix the support platform to the corresponding position on the tabletop.

[0021] Preferredly, the traction system includes a shelf and multiple traction cylinders. The shelf is fixed to the table, and the cylinder body of each traction cylinder is fixed to one of the shelves. The telescopic end of the traction cylinder is connected to a traction rod, and the end of the traction rod is hinged and fixed horizontally to the C-shaped mold box of the corresponding height. Each traction cylinder is communicatively connected to the control display terminal. Displacement sensors are respectively set for each traction rod, and the displacement of the corresponding traction rod is detected when the traction cylinder applies a pulling force to the C-shaped mold box.

[0022] Preferably, a slot is provided on the top surface of the end of the limiting strip near the guide area, and an L-shaped vertical plate is inserted into the slot. The vertical plate is flush with the top corner of the C-shaped mold box. When the C-shaped mold box is stacked vertically, the C-shaped mold box is aligned by the vertical plate and then hinged and fixed with the traction rod. After that, the vertical plate is pulled out.

[0023] Preferably, the pressurization system includes a stand fixed on the table and a pressurization cylinder mounted on the stand. The pressurization cylinder is arranged vertically downward and a steel plate is detachably connected to the telescopic end of the pressurization cylinder. Pressure is applied to the soil sample through the steel plate.

[0024] The present invention has at least the following beneficial effects: The test method for the interfacial mechanical properties of reinforced materials of the present invention uses a slope reinforced material interface simulation device for testing. It can simulate different construction geological environments and set up shear molds with different combinations for testing. By connecting the pressurization system, traction system, pressure sensor, tension sensor, and displacement sensor through the control and display terminal, the pressurization and tension parameters are controlled, and the pressure, tension, displacement and other data during the test process are monitored in real time to calculate the friction coefficient under different interface states. It can provide reliable simulation data for the durability design of reinforced materials under specific slope structural forms and the safe service life of existing reinforced soil flexible support structures. It is simple to operate and has wide adaptability.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] Figure 1 This is a front view structural diagram of the slope reinforcement material interface simulation device of the present invention;

[0027] Figure 2 This is a top view of the shear mold box of the present invention;

[0028] Figure 3 This is a front view of the shear formwork of the present invention when it contains soil and reinforcement samples.

[0029] Figure 4 This is a top view of the interface module of the present invention;

[0030] The accompanying diagrams in the instruction manual are labeled as follows: 1. Table, 2. Support platform, 3. Limiting strip, 4. Shear mold box, 5. C-shaped mold box, 6. Interface module, 7. Pressurization system, 8. Traction system, 9. Displacement sensor, 10. Insulation cover, 11. Temperature sensor, 12. Humidity sensor, 13. Conduit assembly, 14. Vertical ridge, 15. Inclined surface, 16. Vertical surface, 17. Vertical groove, 18. Slide groove, 19. Bolt, 20. Shelf, 21. Traction cylinder, 22. Traction rod, 23. Slot, 24. Vertical plate, 25. Stand, 26. Pressurization cylinder, 27. Steel plate, 30. Soil sample, 31. Reinforcing strip sample. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0032] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figure 1-4 As shown, this invention provides a test method for the interfacial mechanical properties of reinforced materials, using a slope reinforced material interface simulation device. The slope reinforced material interface simulation device includes:

[0034] Table 1, with its upper surface set horizontally, and a support platform 2 set on the table 1. The upper surface of the support platform 2 is horizontal, and a pair of protruding limiting strips 3 are set on the support platform 2 in parallel with each other. The limiting strips 3 extend along the length direction of the support platform 2, forming a guide area between the pair of limiting strips 3.

[0035] Shear box 4 includes multiple C-shaped boxes 5 stacked vertically in layers. The C-shaped boxes 5 are horizontally positioned on the guide area. The width of the C-shaped box 5 is equal to the distance between a pair of limiting strips 3 and can slide freely relative to the limiting strips 3. The open end of the C-shaped box 5 is detachably connected to an interface module 6 to form a circumferentially closed test box. The inside of the test box is used to place a layer of soil sample 30, or a reinforcement sample 31 and a soil sample 30.

[0036] The pressurization system 7 is installed on the table 1. The pressurization system 7 has a pressurization end, on which a pressure sensor is installed. The pressurization end is arranged above the guide area and is used to apply the required pressure to the soil sample 30 directly below.

[0037] The traction system 8 is installed on the table 1 and located on the side facing away from the opening of the C-shaped mold box 5. The traction system 8 has multiple traction ends horizontally arranged facing the shear mold box 4. Each traction end is connected to a C-shaped mold box 5 and is used to control the movement of the C-shaped mold box 5 in the extension direction of the limit strip 3. The traction system 8 is equipped with a tension sensor, and the table 1 is also equipped with a displacement sensor 9 corresponding to the traction end, which is used to detect the displacement of the corresponding C-shaped mold box 5 driven by the traction end.

[0038] The control and display terminal is connected to the pressurization system 7, the traction system 8, the pressure sensor, the tension sensor, and the displacement sensor 9 respectively. It is used to control the operation of the pressurization system 7 and the traction system 8 respectively, and to acquire the data of the pressure sensor, the tension sensor, and the displacement sensor 9.

[0039] The test method includes the following steps:

[0040] S1. Stack C-shaped mold boxes 5 and interface modules 6 in layers, and put the soil and reinforcement samples 31 of the corresponding layer into the test box, keeping all C-shaped mold boxes 5 in the same vertical position.

[0041] S2. Apply downward pressure to the soil using the pressurization system 7;

[0042] S3. Apply tension to the corresponding layer of the shear mold box 4 using the traction system 8, obtain the traction force through the corresponding displacement sensor 9 and tension sensor, and calculate the friction coefficient of the reinforcing material interface using the traction force.

[0043] For ease of explanation, Figure 1 The left-right direction is the length direction of table 1 or support platform 2. The entire device is installed on table 1, and support platform 2 is set near the center. Shear mold box 4 is set on support platform 2. A pair of parallel limiting strips 3 on support platform 2 limit the width of C-shaped mold box 5 on both sides, that is... Figure 1In the front-to-back direction, the upper and lower C-shaped mold boxes 5 are aligned and stacked. Each layer of C-shaped mold box 5 is spliced ​​with an interface module 6 to form a test box with a specific inner shape. The number of test box layers can be set according to the test requirements. If only two test boxes are set, it can be used as the simplest and most intuitive test to observe the relative friction and movement law of the soil on the upper and lower sides of a single tie strip. According to the test requirements of the slope 15, the interface module 6 can be spliced ​​into a slope shape on one side inside the C-shaped mold box 5 to test trapezoidal soil samples. The slope of the slope shape and the length of the C-shaped mold box 5 can be designed and replaced according to the simulated slope parameters. During the test, the density, compaction degree and other parameters of the soil sample 30 are obtained and controlled. Test conditions are set, and the pressurization system 7 and traction system 8 are arranged. The test can be repeated multiple times using existing technology, which will not be elaborated here.

[0044] The experimental method for the interfacial mechanical properties of reinforced materials of the present invention uses a slope reinforced material interface simulation device for testing. It can simulate different construction geological environments and set up shear molds 4 with different combinations for testing. The device is connected to a pressurization system 7, a traction system 8, a pressure sensor, a tension sensor, and a displacement sensor 9 through a control and display terminal to control the pressurization and tension parameters and monitor the pressure, tension, displacement, and other data in real time during the test. This data is used to calculate the friction coefficient under different interface states. It can provide reliable simulation data for the durability design of reinforced materials under specific slope structural forms and the safe service life of existing reinforced soil flexible support structures. The method is simple to operate and has wide applicability.

[0045] In another technical solution, such as Figure 1 As shown, the system also includes a heating and humidification system. The heating and humidification system includes a heat insulation cover 10 covering the outside of the support platform 2 and the shear mold box 4, and a temperature sensor 11 and a humidity sensor 12 installed on the support platform 2. The temperature sensor 11 and humidity sensor 12 are respectively connected to the control display terminal to detect the temperature or humidity around the shear mold box 4. The heat insulation cover 10 corresponds to the traction system 8. The pressurization system 7 is provided with a channel hole. The corresponding structure passes through the channel hole into the heat insulation cover 10. Certain sealing measures are set at the channel hole to ensure that the operation of the traction system 8 and the pressurization system 7 and the accuracy of parameter acquisition are not affected. At least one side of the heat insulation cover 10 is transparent. A conduit group 13 is connected to the bottom of one side of the heat insulation cover 10. Hot air, steam or heat exchange gas is introduced or discharged through the conduit group 13. In step S1, after the test box is arranged, the heat insulation cover 10 is set, and heating or humidifying gas is introduced to the corresponding sensor to achieve the corresponding data, thus completing the test environment setup. By setting up a heating and humidification system, the required temperature and humidity test environment is provided to the shear formwork 4 before the test, which improves the diversity of the test and can more realistically simulate the environment during actual construction and the subsequent evolution of the flexible support structure in the environment.

[0046] In another technical solution, such as Figure 1-4 As shown, the height of the C-shaped mold 5 is equal to the height of the interface module 6. The two ends of the C-shaped mold 5 are provided with multiple pairs of vertical ribs 14, one pair of which is located at the end edge of the C-shaped mold 5. The width of the interface module 6 is equal to the distance between the two ends of the C-shaped mold 5. The interface module 6 has a sloping surface 15 at one end and a vertical surface 16 at the other end in the length direction. Multiple pairs of vertical grooves 17 are symmetrically opened on both sides in the width direction of the interface module 6. The vertical grooves 17 are arranged in conjunction with the vertical ribs 14. The spacing between adjacent pairs of vertical ribs 14 is equal to the horizontal width of the sloping surface 15.

[0047] When testing the mechanical properties of more than 30 interfaces of soil sample 30, the vertical surface 16 of the interface module 6 is aligned with the inside of the C-shaped mold box 5 and inserted downwards into the vertical groove 17 on the vertical ridge 14, forming a rectangular space in the test box to accommodate the soil sample 30.

[0048] By aligning the inclined surface 15 of the interface module 6 with the inside of the C-shaped mold box 5 and inserting the vertical groove 17 downwards onto the vertical ridge 14, an inverted trapezoidal space for accommodating the soil sample 30 is formed inside the test box.

[0049] When the inclined surfaces 15 of two adjacent interface modules 6 are both facing the inside of the C-shaped mold box 5, the upper interface module 6 is staggered relative to the lower interface module 6 and inserted into the vertical ridge 14 that is farther away from the inside of the C-shaped mold box 5, forming an inverted trapezoidal space with the upper and lower parts joined together on the inside of the two C-shaped mold boxes 5.

[0050] By setting mutually cooperating vertical ribs 14 and vertical grooves 17 in the C-shaped mold box 5 and the interface module 6, the test box can be assembled by vertical sliding and inserting the vertical ribs 14 and vertical grooves 17. Friction force or lateral connection structure can be set between the C-shaped mold box 5 and the interface module 6, or even temporary welding fixation can be carried out to ensure the vertical stability of the test box structure. It is only necessary that the vertical interaction between the C-shaped mold box 5 and the interface module 6 has a small impact on the measurement of soil friction coefficient. For the multi-layer soil structure to be tested, multiple test boxes are set up and stacked upwards. At this time, the multi-layer interface module 6 is specially designed as needed, and the angle of the inclined surface 15 is designed to match the spacing of the vertical ribs 14. When there is an inclined surface 15, multiple inclined surfaces 15 can form a continuous transition of the overall inclined surface 15 in the vertical direction, which can more realistically simulate the inclination shape of the slope and the setting of the reinforced flexible support structure on the slope.

[0051] In another technical solution, such as Figure 1As shown, a groove 18 is provided on the table 1 along the length of the limiting strip 3. Multiple fixing holes are provided on the outside of the groove 18 on the table 1. A slider is fixed downward at the bottom of the support platform 2. The slider is located in the groove 18 and can slide along the groove 18 to drive the support platform 2 to move and align the different pressurization positions required for the soil sample 30 directly below the pressurization system 7. A screw hole is provided through the end of the support platform 2. Bolts 19 are screwed into the fixing holes and screw holes at the corresponding positions to fix the support platform 2 to the corresponding positions on the table 1.

[0052] By setting the slide groove 18, the position of the pressurization system 7 can be better matched according to the shape of the test box and the lateral position of the moving test box and the support platform 2. When fixing the position of the support platform 2, it can be detachably fixed by screwing the bolt 19 into the screw hole.

[0053] In another technical solution, such as Figure 1 As shown, the traction system 8 includes a shelf 20 and multiple traction cylinders 21. The shelf 20 is fixed on the table 1. The cylinder body of each traction cylinder 21 is fixed on one of the shelves 20. The telescopic end of the traction cylinder 21 is connected to a traction rod 22. The end of the traction rod 22 is hinged and fixed to the C-shaped mold 5 of the corresponding height in the horizontal direction. Each traction cylinder 21 is communicatively connected to the control display terminal. The displacement sensor 9 is respectively set for each traction rod 22. When the traction cylinder 21 applies a pulling force to the C-shaped mold 5, it detects the displacement of the corresponding traction rod 22.

[0054] The traction cylinder 21 is supported and installed by the shelf 20, keeping it at the same height as the corresponding C-shaped mold 5, with the traction direction being horizontal. Each traction cylinder 21 can be independently connected and controlled through the control display terminal. As needed, no tension can be applied to the C-shaped mold 5 at different heights to keep the test box position unchanged, or different tensions can be applied to realize various interaction simulation tests between soil samples 30 and reinforcement samples 31 in different layers.

[0055] In another technical solution, such as Figure 1-2 As shown, a slot 23 is provided on the top surface of the end of the limiting strip 3 near the guide area, and an L-shaped vertical plate 24 is inserted into the slot 23. The vertical plate 24 is flush with the top corner of the C-shaped mold box 5. When the C-shaped mold box 5 is stacked vertically, the C-shaped mold box 5 is aligned by the vertical plate 24 and then hinged and fixed with the traction rod 22. After that, the vertical plate 24 is pulled out.

[0056] Insert an L-shaped vertical plate 24 into the slot 23. The L-shaped vertical plate 24 is located at the top corner of all C-shaped mold boxes 5, which facilitates the vertical alignment and stacking of the test boxes. After the guiding and limiting are completed, the vertical plate 24 can be removed before applying the tensile force test.

[0057] In another technical solution, such as Figure 1 As shown, the pressurization system 7 includes a stand 25 fixed on the table 1 and a pressurization cylinder 26 mounted on the stand 25. The pressurization cylinder 26 is arranged vertically downwards, and a steel plate 27 is detachably connected to the telescopic end of the pressurization cylinder 26. Pressure is applied to the soil sample 30 through the steel plate 27. Depending on the different shapes of the test box on the lower side, the steel plate 27 of the corresponding specification can be replaced to improve the test applicability of the overall device.

[0058] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A test method for the interfacial mechanical properties of reinforced materials, characterized in that, The experiment was conducted using a slope reinforcement material interface simulation device, which includes: The table has a horizontally positioned upper surface. A support platform is set on the table. The upper surface of the support platform is also horizontal. A pair of protruding limiting strips are set parallel to each other on the support platform. The limiting strips extend along the length of the support platform and form a guide area between the pair of limiting strips. Shear test box, comprising multiple C-shaped test boxes stacked vertically, the C-shaped test boxes being horizontally positioned on a guide area, the width of the C-shaped test box being equal to the spacing between a pair of limiting strips and being able to slide freely relative to the limiting strips, the open end of the C-shaped test box being detachably connected to an interface module to form a circumferentially closed test box, the inside of the test box being used to place a layer of soil sample, or a reinforcement strip sample and a soil sample. The pressurization system is mounted on a table and has a pressurization end with a pressure sensor. The pressurization end is located above the guide area and is used to apply the required pressure to the soil sample directly below. The traction system is mounted on the table and located on the side facing away from the opening of the C-shaped mold box. The traction system has multiple traction ends horizontally arranged facing the shear mold box. Each traction end is connected to a C-shaped mold box and is used to control the movement of the C-shaped mold box in the extension direction of the limit strip. The traction system is equipped with a tension sensor, and the table is also equipped with a displacement sensor corresponding to the traction end to detect the displacement of the corresponding C-shaped mold box driven by the traction end. The control and display terminal is connected to the pressurization system, traction system, pressure sensor, tension sensor, and displacement sensor respectively. It is used to control the operation of the pressurization system and traction system respectively, and to acquire data from the pressure sensor, tension sensor, and displacement sensor. The test method includes the following steps: S1. Stack the C-shaped molds and interface modules in layers, and put the soil and reinforcement samples of the corresponding layer into the test box, keeping all C-shaped molds in the same vertical position; S2. Apply downward pressure to the soil using a pressurization system; S3. Apply tension to the corresponding layer of the shear formwork using the traction system, obtain the traction force through the corresponding displacement sensor and tension sensor, and calculate the friction coefficient of the reinforcing material interface using the traction force. The height of the C-shaped mold box is equal to the height of the interface module. Multiple pairs of vertical ridges are arranged opposite each other at both ends of the C-shaped mold box, with one pair of vertical ridges located at the end edge of the C-shaped mold box. The width of the interface module is equal to the distance between the two ends of the C-shaped mold box. One end of the interface module is a sloping surface in the length direction and the other end is a vertical surface. Multiple pairs of vertical slots are symmetrically opened on both sides in the width direction of the interface module. The vertical slots are arranged in conjunction with the vertical ridges, and the spacing between adjacent pairs of vertical ridges is equal to the horizontal width of the sloping surface. When testing the mechanical properties of multiple interfaces of a soil sample, the vertical surface of the interface module is facing the inside of the C-shaped mold box, and the vertical groove is aligned downward and inserted into the vertical edge to form a rectangular space for accommodating the soil sample in the test box. By aligning the inclined surface of the interface module with the inside of the C-shaped mold box and inserting it downwards into the vertical ridge, an inverted trapezoidal space for accommodating soil samples is formed inside the test box. When the inclined surfaces of two adjacent interface modules face the inside of the C-shaped mold, the upper interface module is staggered relative to the lower interface module and inserted on the vertical edge that is farther away from the inside of the C-shaped mold, forming an inverted trapezoidal space that is spliced ​​up and down on the inside of the two C-shaped molds.

2. The test method for the interfacial mechanical properties of reinforced materials as described in claim 1, characterized in that, It also includes a heating and humidification system, which includes a heat insulation cover covering the outside of the support platform and the shear mold box, and temperature and humidity sensors mounted on the support platform. The temperature and humidity sensors are respectively connected to the control and display terminal to detect the corresponding temperature or humidity around the shear mold box. The heat insulation cover corresponds to the traction system. The pressurization system is provided with channel holes. At least one side of the heat insulation cover is transparent. A conduit group is connected to the bottom of one side of the heat insulation cover. Hot gas is introduced or heat exchange gas is discharged through the conduit group. In step S1, after the test box is arranged, the heat insulation cover is set, and heating or humidifying gas is introduced to the corresponding sensor to achieve the corresponding data, thus completing the test environment setup.

3. The test method for the interfacial mechanical properties of reinforced materials as described in claim 1, characterized in that, A sliding groove is provided on the tabletop along the length of the limiting strip. Multiple fixing holes are provided on the outside of the sliding groove on the tabletop. A slider is fixed downward at the bottom of the support platform. The slider is located in the sliding groove and can slide along the sliding groove to drive the support platform to move and align the different pressurization positions required for the soil sample directly below the pressurization system. A screw hole is provided through the end of the support platform. Bolts are screwed into the fixing holes and screw holes at the corresponding positions to fix the support platform to the corresponding positions on the tabletop.

4. The test method for the interfacial mechanical properties of reinforced materials as described in claim 1, characterized in that, The traction system includes a shelf and multiple traction cylinders. The shelf is fixed to the table, and the cylinder body of each traction cylinder is fixed to one of the shelves. The telescopic end of the traction cylinder is connected to a traction rod. The end of the traction rod is hinged and fixed horizontally to the C-shaped mold box of the corresponding height. Each traction cylinder is communicatively connected to the control and display terminal. Displacement sensors are respectively set for each traction rod. When a pulling force is applied to the C-shaped mold box by the traction cylinder, the displacement of the corresponding traction rod is detected.

5. The test method for the interfacial mechanical properties of reinforced materials as described in claim 4, characterized in that, A slot is provided on the top surface of the end of the limiting strip near the guide area, and an L-shaped vertical plate is inserted into the slot. The vertical plate is flush with the top corner of the C-shaped mold box. When the C-shaped mold box is stacked vertically, the C-shaped mold box is aligned by the vertical plate and then hinged and fixed with the traction rod. After that, the vertical plate is pulled out.

6. The test method for the interfacial mechanical properties of reinforced materials as described in claim 1, characterized in that, The pressurization system includes a stand fixed on the table and a pressurization cylinder installed on the stand. The pressurization cylinder is arranged vertically downward and a steel plate is detachably connected to the telescopic end of the pressurization cylinder. Pressure is applied to the soil sample through the steel plate.

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