Creep direct shearing and drawing integrated experimental device based on temperature control

Abstract

The utility model relates to a creep direct shear drawing integrated experimental device based on temperature control, which is used for performing direct shear or drawing test on a sample, and comprises a cabinet body, a control box, a temperature control box, a horizontal loading unit, a vertical loading unit, a direct shear drawing unit, a bearing plate, a track and a horizontal gear lever, the rail is installed in the temperature control box, the bearing plate is installed on the rail, the direct shear drawing unit is installed on the bearing plate, the sample is installed in the direct shear drawing unit, the horizontal loading unit is connected with the control box and the direct shear drawing unit, and the vertical loading unit is installed on the cabinet body and makes contact with the sample. The horizontal blocking rod is installed on the cabinet body and connected with the direct shear drawing unit, the horizontal loading unit and the direct shear drawing unit are movably connected, only the direct shear drawing unit needs to be replaced, and the whole replacement process is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated experimental devices for direct shear and pull-out, and in particular to an integrated experimental device for creep direct shear and pull-out based on temperature control. Background Technology

[0002] In practical engineering, interface failure between soil and structures is usually caused by long-term stress accumulation. Especially under complex environmental conditions, factors such as temperature changes significantly influence the interfacial mechanical behavior, substantially altering the mechanical properties of both the structure and the soil, leading to weakened interfacial strength or accelerated deformation. Furthermore, the long-term creep effect in pull-out and direct shear tests also significantly impacts interfacial behavior; prolonged stress leads to gradual degradation of interfacial properties and cumulative deformation. This temperature effect and creep behavior are particularly pronounced in regions with large seasonal temperature differences or under extreme climatic conditions, directly affecting the interfacial stability between soil and structures. Therefore, considering the combined effects of temperature changes and long-term creep effects in pull-out and direct shear tests on the soil-structure interface is of great significance for practical engineering design and construction.

[0003] Existing experimental methods cannot simulate complex environmental conditions, leading to significant deviations between experimental results and actual engineering applications. While displacement-controlled direct shear tests and pull-out tests are commonly used methods for studying the mechanical properties of soil-structure interfaces, they have significant limitations in engineering applications. First, displacement-controlled tests cannot accurately reproduce actual stress conditions, causing experimental results to deviate from reality. Second, existing equipment has limited functionality; direct shear and pull-out tests require separate instruments, increasing costs, and errors between different instruments affect data comparability, making it difficult to comprehensively reflect the interface's mechanical properties. Furthermore, although existing instruments can conduct long-term creep tests, they cannot simultaneously simulate high and low temperature thermal cycling environments, thus failing to fully reveal interface behavior under complex conditions. The creep characteristics and temperature effects of soil are crucial for the long-term stability of engineering projects. Although existing studies have explored soil-structure interface properties through direct shear or pull-out tests, the results differ significantly due to differences in experimental mechanisms, failing to systematically reveal the essence of interface behavior. Therefore, an integrated testing platform combining high and low temperature thermal cycling, creep testing, and direct shear pull-out is particularly important. This platform can not only realistically reproduce the mechanical response of soil and structures in complex environments, but also provide more reliable experimental data, thereby providing a scientific basis for engineering design and long-term stability assessment.

[0004] Patent application CN116359039A discloses a high and low temperature direct shear pull-out friction apparatus and its experimental method, comprising: a high and low temperature system, a vertical loading system, a soil shear box, a horizontal shear system, an experimental moving platform, an experimental table, and a computer control system. This apparatus includes an experimental platform and the necessary high and low temperature system for controlling experimental conditions. The soil shear box is used to load experimental samples. The movement of the vertical loading system, the horizontal shear system, and the experimental moving platform is controlled by the computer control system to complete the experimental actions. The computer control system simultaneously provides experimental results and data. This apparatus is used to study the properties of geosynthetics under extreme high and low temperature environments through direct shear and pull-out tests of the interfacial friction characteristics of soil and reinforcement under high and low temperature conditions. Although this patent discloses the ability to change the temperature, the process of replacing the upper and lower shear boxes is inconvenient.

[0005] Therefore, providing an experimental apparatus that allows for easy replacement of both the upper and lower shear boxes is an urgent problem to be solved. Utility Model Content

[0006] The purpose of this invention is to overcome the defects of the existing technology and provide a temperature-controlled integrated creep direct shear pull-out experimental device.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] According to one aspect of this utility model, a temperature-controlled creep direct shear pull-out integrated experimental device is provided for performing direct shear or pull-out tests on samples. The device includes a cabinet, a control box, a temperature control box, a horizontal loading unit, a vertical loading unit, a direct shear pull-out unit, a pressure plate, a track, and a horizontal stop bar. The control box and the temperature control box are both mounted on the cabinet. The track is installed inside the temperature control box. The pressure plate is mounted on the track. The direct shear pull-out unit is mounted on the pressure plate. The sample is installed in the direct shear pull-out unit. The horizontal loading unit is connected to both the control box and the direct shear pull-out unit. The vertical loading unit is mounted on the cabinet and contacts the sample. The horizontal stop bar is mounted on the cabinet and connected to the direct shear pull-out unit. The horizontal loading unit and the direct shear pull-out unit are movably connected.

[0009] As a preferred technical solution, the straight shear pulling unit includes a straight shear sub-unit, which includes a transition block, a horizontal push rod, a lower shear box, and a straight shear fixture. The lower shear box is mounted on a pressure plate, and the horizontal loading unit, the transition block, the horizontal push rod, the straight shear fixture, and the lower shear box are connected in sequence.

[0010] As a preferred technical solution, the straight shear unit further includes an upper shear box and a water tank, both of which are installed on the lower shear box. The horizontal stop bar is in contact with the upper shear box, and the sample is installed in the upper and lower shear boxes.

[0011] As a preferred technical solution, the direct shearing and drawing unit further includes a drawing sub-unit, which includes a drawing box and a drawing clamp. The drawing box is mounted on a pressure plate, and the drawing clamp is connected to the drawing box and the horizontal loading unit respectively. The sample is installed in the drawing box.

[0012] As a preferred technical solution, the pull box includes a hole, which is installed in the middle of the pull box.

[0013] As a preferred technical solution, the horizontal loading unit includes a threaded column, a sensor, and a horizontal push-pull rod, and the control box, threaded column, sensor, horizontal push-pull rod, and straight shear pulling unit are connected in sequence.

[0014] As a preferred technical solution, the device further includes a slider, the horizontal push-pull rod is connected to the straight shear pull unit through the slider, and the pressure plate is mounted on the track through the slider.

[0015] As a preferred technical solution, the vertical loading unit includes a sensor and a vertical pressure rod, the sensor is mounted on the vertical pressure rod, and the vertical pressure rod is connected to the sample.

[0016] As a preferred technical solution, the device further includes a stop block, which is installed next to the guide rail.

[0017] As a preferred technical solution, the horizontal loading unit and the direct shearing and pulling unit are connected by a pin.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The horizontal loading unit and the direct shear pulling unit of this utility model are movably connected. When it is necessary to change the experiment, only the direct shear pulling unit needs to be replaced, while the horizontal loading unit remains unchanged. The number of parts to be replaced is small, and the overall replacement process is simple and convenient, which is convenient for experiments.

[0020] 2. This utility model is equipped with a temperature control chamber, which can accurately control the temperature of the test environment, simulate the thermal cycling conditions in actual engineering, and can quickly adjust the temperature within the range of -50℃ to 200℃. It can simulate temperature changes under seasonal temperature differences or extreme climatic conditions, study the influence of temperature on the mechanical behavior of the interface, reveal the strength decay law and deformation mechanism of the soil-structure interface under different temperature conditions, and provide accurate experimental basis for engineering applications in complex environments.

[0021] 3. The horizontal loading unit and the direct shear pull unit of this utility model are connected by pins. Corresponding pin holes are set on the horizontal push-pull rod, the adapter block and the pull clamp. By inserting the cylindrical pin into the pin hole, quick disassembly and installation can be completed, which greatly improves the convenience and efficiency of the test operation.

[0022] 4. This utility model is equipped with a stop block. In the pull test, the stop block is used to stop the pull box from moving on the track, so that it will not fall off the track. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the shear test structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the pull-out test structure of this utility model;

[0025] Figure 3 This is a right view of the device of this utility model;

[0026] Figure 4 This is a left view of the device of this utility model;

[0027] Figure 5 This is a top view of the shear test structure fixture of the device of this utility model;

[0028] Figure 6 This is a top view of the track of the device of this utility model;

[0029] Figure 7 This is a diagram of the direct shear creep test of this utility model at 60℃;

[0030] Figure 8 This is a diagram of the pull-out creep test of this utility model at 60℃.

[0031] 1. Control box, 2. Temperature control box, 3. Threaded column, 4. Sensor, 5. Horizontal push-pull rod, 6. Adapter block, 7. Horizontal push rod, 8. Pressure plate, 9. Upper shear box, 10. Lower shear box, 11. Pull-out box, 12. Water tank, 13. Straight shear fixture, 14. Pull-out fixture, 15. Horizontal stop bar, 16. Vertical pressure bar, 17. Slider, 18. Track, 19. Stop block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0033] Purpose of the utility model: This utility model relates to a large-scale integrated high and low temperature controlled creep, direct shear, and pull-out testing instrument. By achieving seamless switching between direct shear and pull-out tests on the same equipment, it avoids experimental errors caused by changing experimental equipment and saves costs. The built-in high and low temperature test chamber can accurately control the test environment temperature, simulate the thermal cycling conditions in actual engineering, and provide accurate experimental basis for engineering applications in complex environments. At the same time, through horizontal and vertical loading devices, it supports long-term creep testing and promotes the research of creep mechanical properties.

[0034] Technical Solution: A large-scale integrated high and low temperature controlled creep, direct shear, and pull-out testing instrument, comprising a computer control system, a temperature control chamber, a horizontal loading device, a vertical loading device, an adapter block, a shear box, and a pull-out test chamber. The temperature control chamber precisely controls the test environment temperature, simulating actual thermal cycling conditions in engineering practice; the adapter block enables seamless switching between direct shear and pull-out tests, avoiding errors caused by equipment replacement; constant loads are applied through the horizontal and vertical loading devices, supporting long-term creep testing, and real-time monitoring of the stress, displacement, and deformation of the specimen, providing accurate experimental data for practical engineering applications.

[0035] Utility Model Principle: This utility model uses stress control technology to accurately simulate the stress distribution in actual engineering projects, ensuring a high degree of consistency between the test results and the actual engineering conditions. Simultaneously, it uses a temperature-controlled chamber to simulate the environment, reproducing the temperature variations at the engineering site and studying the influence of temperature on the interfacial mechanical behavior. By integrating long-term creep testing functions such as direct shear and pull-out tests, this utility model can comprehensively characterize the mechanical response of soil-structure interfaces under different stress states and environmental conditions, revealing its strength decay laws and deformation mechanisms.

[0036] This invention provides a temperature-controlled integrated creep-shear-pull-out experimental device. The horizontal loading unit and the direct shear-pull-out unit are movably connected. When changing experimental settings, only the direct shear-pull-out unit needs to be replaced, while the horizontal loading unit remains stationary. This minimizes the number of parts required for replacement, simplifying the overall process and facilitating experimentation. The invention includes a temperature control chamber, enabling precise control of the experimental environment temperature. It simulates actual thermal cycling conditions in engineering projects, allowing for rapid temperature adjustment within a range of -50℃ to 200℃. This simulates seasonal temperature differences or temperature variations under extreme climatic conditions, allowing for the study of the influence of temperature on interfacial mechanical behavior. It reveals the strength decay law and deformation mechanism of the soil-structure interface under different temperature conditions, providing accurate experimental evidence for engineering applications in complex environments. The horizontal loading unit and the direct shear-pull-out unit are connected by pins. Corresponding pin holes are provided on the horizontal push-pull rod, adapter block, and pull-out clamp. Inserting cylindrical pins into these holes allows for quick disassembly and installation, greatly improving the convenience and efficiency of experimental operations. This invention features a stop block, which, during a pull-out test, prevents the pull-out box from moving off the track.

[0037] Example 1

[0038] like Figures 1-6 As shown, a temperature-controlled creep direct shear pull-out integrated experimental device is used for direct shear or pull-out tests on samples. The device includes a cabinet, a control box 1, a temperature control box 2, a horizontal loading unit, a vertical loading unit, a direct shear pull-out unit, a pressure plate 8, a track 18, and a horizontal stop bar 15. The control box 1 and the temperature control box 2 are both mounted on the cabinet. The track 18 is installed inside the temperature control box 2. The pressure plate 8 is installed on the track 18. The direct shear pull-out unit is installed on the pressure plate 8. The sample is installed in the direct shear pull-out unit. The horizontal loading unit is connected to both the control box 1 and the direct shear pull-out unit. The vertical loading unit is mounted on the cabinet and contacts the sample. The horizontal stop bar 15 is mounted on the cabinet and connected to the direct shear pull-out unit. The horizontal loading unit and the direct shear pull-out unit are movably connected.

[0039] In this embodiment, a modular design is adopted, enabling rapid switching and adjustment between shear and pull-out tests, achieving integrated testing of direct shear and pull-out tests. The horizontal loading device remains fixed in both test modes, and seamless switching between test modes can be achieved by changing the connecting components, avoiding system errors caused by equipment replacement and improving experimental accuracy and repeatability. In the direct shear test mode, the horizontal loading device is connected to the adapter block 6 to apply a constant shear force, causing the specimen to undergo shear deformation along the soil-structure interface, thereby determining its shear strength and long-term shear creep characteristics. In the pull-out test mode, the horizontal loading device is directly connected to the pull-out test fixture 14. By controlling the loading rate and pull-out force, the deformation mechanism and interfacial bonding characteristics of the specimen under pull-out action are studied. In addition, the adapter block 6 adopts a cylindrical pin insertion pin hole connection method, which can be quickly disassembled and installed without additional complex tools, greatly improving the convenience and efficiency of test operation. This modular design not only improves the adaptability of the equipment, allowing it to be flexibly adjusted according to different test requirements, but also ensures the consistency of loading conditions during the test, thereby improving the reliability of data and engineering applicability.

[0040] The straight shearing and pulling unit includes a straight shear sub-unit, which includes a transition block 6, a horizontal push rod 7, a lower shear box 10, and a straight shear clamp 13. The lower shear box 10 is installed on the pressure plate 8. The horizontal loading unit, the transition block 6, the horizontal push rod 7, the straight shear clamp 13, and the lower shear box 10 are connected in sequence.

[0041] The straight shear unit also includes an upper shear box 9 and a water tank 12, both of which are mounted on a lower shear box 10. The horizontal stop bar 15 is in contact with the upper shear box 9, and the sample is mounted in the upper shear box 9 and the lower shear box 10.

[0042] The horizontal loading unit includes a threaded column 3, a sensor 4, and a horizontal push-pull rod 5. The control box 1, the threaded column 3, the sensor 4, the horizontal push-pull rod 5, and the straight shear pull unit are connected in sequence.

[0043] The device also includes a slider 17, the horizontal push-pull rod 5 is connected to the straight shear pull unit through the slider 17, and the pressure plate 8 is mounted on the track 18 through the slider 17.

[0044] The vertical loading unit includes a sensor 4 and a vertical pressure rod 16. The sensor 4 is mounted on the vertical pressure rod 16, and the vertical pressure rod 16 is connected to the sample.

[0045] The device also includes a stop block 19, which is mounted beside the guide rail 18. The horizontal loading unit and the direct shear pulling unit are connected by a pin.

[0046] In this embodiment, the two screw holes at the bottom of the adapter block 6 are aligned with the two welded screws on the rail plate. The left side of the adapter block 6 is connected to the horizontal push rod 5, and a cylindrical pin is inserted into the round hole on the upper surface of the adapter block 6. The right side of the adapter block 6 is connected to the horizontal push rod 7. The lower shear box 10 and the water tank 12 are fixed together on the pressure plate 8.

[0047] To fix the geogrid (i.e., the structure), lay the geogrid flat on the surface of the water tank 12 and cover the six conical holes on the surface of the water tank 12 below the shear test structure fixture. Then fix the geogrid to the water tank 12 using the shear test structure fixture. The fixed geogrid should completely cover the surface in contact with the upper shear box 9 and be flat without wrinkles.

[0048] Prepare the sample by placing the upper shear box 9 directly above the structure, completely covering the surface in contact with it. According to the test requirements, place a sample with dimensions of 300×300×75mm into the upper shear box. Adjust the distance between the horizontal stop 15 and the upper shear box 9 by rotating the rotating disc, ensuring the horizontal stop 15 contacts the right side of the upper shear box 9. This prevents the upper shear box 9 from moving to the right without rotating the rotating disc. Turn on the temperature control chamber 2 and adjust the temperature to the required test value. After the chamber temperature reaches the target temperature, maintain this temperature for a period of time to ensure the sample temperature rises uniformly and stabilizes at the required level. Using the computer control system, set the normal stress, normal stress loading rate, steps, test direction, constant stress control mode, control value, control parameters, switching conditions, pause time, and number of cycles according to the test requirements before conducting the test. The test will first apply normal stress (i.e., vertical loading unit), loading to the set normal stress according to the normal stress loading rate and maintaining it. After the set normal stress is reached and stabilized, the horizontal push rod 7 contacts the left side of the lower shear box 10 and begins to push the lower shear box 10, the water tank 12 and the geogrid fixed to the water tank 12 as a whole along the contact surface between the structure and the sample (i.e., the soil-structure interface) to carry out a shear test under creep conditions.

[0049] After the test, the software automatically generates curves showing the relationship between shear stress and deformation, force and time, maximum shear stress and normal stress, normal stress and normal displacement, and related test results. These curves and test results are used to calculate the cohesion, friction angle, and friction ratio between the geogrid and the geotextile sample. Figure 7 As shown.

[0050] The temperature control chamber 2 integrates a high-efficiency circulating air duct design and features a multi-layered insulation structure to ensure uniform temperature distribution within the chamber, preventing localized overheating or uneven cooling from interfering with test results. Furthermore, the temperature control system is equipped with a rapid heating and cooling device, enabling significant temperature adjustments in a short time to adapt to temperature variations under different operating conditions and improve test efficiency. The temperature control chamber is made of corrosion-resistant and aging-resistant composite materials, possessing excellent environmental tolerance and maintaining stable performance even under long-term high and low temperature alternation conditions, ensuring test repeatability and reliability. The temperature control chamber 2 also features a thermal cycling loading function, allowing for temperature increases and decreases at set time intervals to simulate the long-term mechanical effects of alternating temperature environments such as diurnal temperature variations and seasonal changes on the soil-structure interface in actual engineering projects.

[0051] Control Box 1 integrates a system with high-precision data acquisition, remote monitoring, intelligent analysis, and anomaly early warning functions, providing comprehensive support for efficient operation and precise control of the experiment. The system supports remote control and data sharing, allowing experimenters to monitor the experimental status in real time, adjust experimental parameters, and remotely download or analyze experimental data via wired or wireless network connections, improving the flexibility and efficiency of experimental operations. The system features multi-channel data acquisition capabilities, simultaneously recording key parameters such as sample stress, displacement, deformation, and temperature, and automatically generating experimental curves for visualized management of the experimental process. Furthermore, the system is equipped with an intelligent data analysis module that automatically calculates key mechanical indicators such as creep rate, shear strength decay, and pull-out resistance changes based on real-time acquired data, providing accurate experimental basis for engineering applications. To ensure experimental safety and data reliability, the computer control system incorporates an intelligent early warning mechanism that monitors the operating status of the loading system, temperature control system, and sensors in real time. Once an abnormality is detected (such as overload, excessive temperature fluctuations, or equipment malfunction), the system will immediately issue an alarm and automatically pause the experiment to prevent equipment damage or data distortion.

[0052] Example 2

[0053] The direct shearing and drawing unit also includes a drawing sub-unit, which includes a drawing box 11 and a drawing clamp 14. The drawing box 11 is mounted on the pressure plate 8, and the drawing clamp 14 is connected to the drawing box 11 and the horizontal loading unit respectively. The sample is installed in the drawing box 11.

[0054] The pull box 11 includes a hole, which is installed in the middle of the pull box 11.

[0055] In this embodiment, after the shear test, loosen the fixing nuts between the shear box and the pressure plate 8, remove the upper and lower shear boxes, and fix the pull-out box 11 to the pressure plate 8 with screws. Fix the pull-out clamp 14 to the slider 17. Connect the horizontal push-pull rod 5 to the left side of the pull-out clamp 14. Add the sample into the pull-out box 11. When the sample is almost flush with the middle hole on the left side of the pull-out box 11, place the geogrid (placed horizontally) along the hole. Place the geogrid on the left side of the hole into the pull-out clamp 14 and tighten the bolts of the pull-out clamp 14 to secure it. The test requires a sample with a length, width, and height of 250×200×75mm. Turn on the temperature control chamber 2 and adjust the temperature to the set value required for the test. After the temperature inside the chamber reaches the target temperature, maintain this temperature for a period of time to ensure that the sample temperature rises uniformly and stabilizes at the required temperature.

[0056] The computer control system sets the normal stress, normal stress loading rate, steps, test direction, constant stress control mode, control value, control parameters, switching conditions, pause time, and number of cycles according to the test requirements before conducting the test. The test first applies normal stress, loading it to the set normal stress according to the normal stress loading rate and maintaining it. After reaching and stabilizing the set normal stress, the horizontal push-pull rod 5 begins to pull the geogrid, conducting a pull-out test under creep conditions. After the test, the software automatically generates curves showing the relationship between shear stress and deformation, force and time, maximum shear stress and normal stress, normal stress and normal displacement, and related test results. The correlation curves and test results are used to calculate the cohesion, friction angle, and friction ratio between the structure and the geotechnical sample (i.e., the soil-structure interface). Figure 8 As shown.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A temperature control-based creep direct shear and tensile integrated experimental device for a sample to perform a direct shear or tensile test, characterized in that, The device comprises a cabinet, a control box (1), a temperature control box (2), a horizontal loading unit, a vertical loading unit, a direct shear and pull-out unit, a pressure plate (8), a track (18) and a horizontal stop bar (15), the control box (1) and the temperature control box (2) are both installed on the cabinet, the track (18) is installed in the temperature control box (2), the pressure plate (8) is installed on the track (18), the direct shear and pull-out unit is installed on the pressure plate (8), the sample is installed in the direct shear and pull-out unit, the horizontal loading unit is connected with the control box (1) and the direct shear and pull-out unit respectively, the vertical loading unit is installed on the cabinet and contacts with the sample, the horizontal stop bar (15) is installed on the cabinet and connected with the direct shear and pull-out unit, and the horizontal loading unit and the direct shear and pull-out unit are movably connected. 2.The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 1, wherein, The direct shear and pull-out unit comprises a direct shear unit, the direct shear unit comprises an adapter block (6), a horizontal push rod (7), a lower shear box (10) and a direct shear clamp (13), the lower shear box (10) is installed on the pressure plate (8), and the horizontal loading unit, the adapter block (6), the horizontal push rod (7), the direct shear clamp (13) and the lower shear box (10) are sequentially connected. 3.The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 2, wherein, The direct shear unit further comprises an upper shear box (9) and a water tank (12), the upper shear box (9) and the water tank (12) are both installed on the lower shear box (10), the horizontal stop bar (15) contacts with the upper shear box (9), and the sample is installed in the upper shear box (9) and the lower shear box (10).

4. The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 1, characterized in that, The direct shear and pull-out unit further comprises a pull-out subunit, the pull-out subunit comprises a pull-out box (11) and a pull-out clamp (14), the pull-out box (11) is installed on the pressure plate (8), and the pull-out clamp (14) is connected with the pull-out box (11) and the horizontal loading unit respectively, and the sample is installed in the pull-out box (11).

5. The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 4, characterized in that, The pull-out box (11) comprises a pore, and the pore is installed in the middle of the pull-out box (11).

6. The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 1, wherein, The horizontal loading unit comprises a threaded column (3), a sensor (4) and a horizontal push-pull rod (5), and the control box (1), the threaded column (3), the sensor (4), the horizontal push-pull rod (5) and the direct shear and pull-out unit are sequentially connected.

7. The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 6, characterized in that, The device further comprises a sliding block (17), the horizontal push-pull rod (5) is connected with the direct shear and pull-out unit through the sliding block (17), and the pressure plate (8) is installed on the track (18) through the sliding block (17). 8.The temperature-controlled creep direct shear and tensile integrated experimental device according to claim 1, wherein, The vertical loading unit comprises a sensor (4) and a vertical pressure rod (16), the sensor (4) is installed on the vertical pressure rod (16), and the vertical pressure rod (16) is connected with the sample.

9. The temperature-controlled creep direct shear and tensile integrated experimental device of claim 1, wherein, The device further comprises a stop block (19), and the stop block (19) is installed beside the track (18).

10. The temperature-controlled creep direct shear and tensile integrated experimental device of claim 1, wherein, The horizontal loading unit and the direct shear and pull-out unit are connected by a bolt.

Images