Pile-soil pressure testing device and testing method for indoor slope model test

Abstract

The present application relates to a kind of pile soil pressure testing device and testing method for indoor slope model test, wherein device includes several round pile molds and several soil pressure cell forming systems, the soil pressure cell forming system includes connecting rod and soil pressure cell forming block, two sides of the soil pressure cell forming block are respectively connected with the end of a connecting rod, the other end of the connecting rod is detachably connected with the pile segment connection component, through-hole is formed on the round pile mold, and the soil pressure cell forming block is arranged in the round pile mold through the through-hole.The overall detachable connection can flexibly determine the length of the pile body to be simulated;Pile body mold and soil pressure cell forming system adopt split design, so that the device has very high practicability;Soil pressure cell forming system can be flexibly laid out, and the number and position can be determined according to the test needs, so that the present application has good versatility;Main structural material can be reused, meet environmental protection.

Description

Technical Field

[0001] This invention belongs to the field of indoor model testing of anti-slide piles, and in particular relates to a pile-soil pressure testing device and testing method for indoor slope model testing. Background Technology

[0002] Circular anti-slide piles are widely used in landslide disaster control, especially with the transformation of my country's social labor structure, circular anti-slide piles that can be directly drilled using mechanical rotary drilling are becoming increasingly popular. However, in indoor model tests of circular anti-slide piles, earth pressure cells are often directly attached to the pile surface to measure the earth pressure exerted by the landslide on the pile. This practice leads to stress concentration at the force sensor location, resulting in inaccurate internal force data for the pile.

[0003] Furthermore, when conducting indoor model tests on anti-slide piles, disposable materials (such as PVC pipes) are generally used. These materials are not recyclable after demolding, leading to resource waste and environmental pollution, which is inconsistent with my country's current sustainable development strategy.

[0004] Therefore, there is a need to develop an indoor model test device for pile earth pressure that can provide accurate data and allows for the reuse and easy disassembly of pile molds. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a pile-soil pressure testing device and testing method for indoor slope model tests, so as to overcome the defects of the prior art, which are that the pile body stress concentration leads to inaccurate internal force data and the pile body mold cannot be recycled after demolding.

[0006] The pile-earth pressure testing device for indoor slope model testing includes several circular pile molds and several earth pressure box forming systems. Two adjacent circular pile molds are connected by a pile segment connecting member. The earth pressure box forming system includes a connecting rod and an earth pressure box forming block. The two sides of the earth pressure box forming block are respectively connected to one end of a connecting rod. The other end of the connecting rod is detachably connected to the pile segment connecting member, the outer wall of the circular pile mold, or another connecting rod. A through hole is formed on the circular pile mold, and the earth pressure box forming block extends into the circular pile mold through the through hole.

[0007] Furthermore, the circular pile mold consists of two mold halves with the same structural shape, and the through hole is formed between the two mold halves. The earth pressure box forming system is connected between the two mold halves to form a whole. The pile segment connecting component is provided on both mold halves.

[0008] Furthermore, the earth pressure box forming system also includes an operating handle, a central transition block, and sliding blocks. The middle part of the operating handle is connected to two connecting rods, and the inner end of the operating handle is connected and fixed to the earth pressure box forming block through the central transition block. Sliding blocks are provided on both sides of the central transition block. Earth pressure box guide rails are provided on both mold halves on both sides of the through hole. The sliding blocks on both sides of the central transition block are limited to sliding within the corresponding earth pressure box guide rails on both sides. Pile body sealing strips are inserted into the earth pressure box guide rails above and below the central transition block.

[0009] Furthermore, the through hole extends to both the upper and lower ends of the mold half, and correspondingly, the earth pressure box guide rail extends to both the upper and lower ends of the mold half.

[0010] Furthermore, tensile strength portions are formed on both sides of the sliding block, forming a cross-shaped structure with the sliding block, and the earth pressure box guide rail is formed with a receiving groove that cooperates with the tensile strength portions.

[0011] Furthermore, the pile segment connecting component includes a pile segment connecting block. The inner wall of the pile segment connecting block is fixedly connected to the circular pile mold and extends to the upper and lower edges of the circular pile mold. Both the upper and lower ends of the pile segment connecting block are bent outward and extend to form connecting parts. Pile segment butt bolt holes are provided on both connecting parts. Sliding rail grooves are provided on the pile segment connecting blocks on both sides of the connecting parts. The sliding rail grooves extend to the upper and lower ends of the pile segment connecting block. The connecting rod is slidably disposed in the sliding rail groove.

[0012] Furthermore, a slide rail connector is connected to the end of the connecting rod, and a pulley is rotatably mounted on the slide rail connector, the pulley slidingly engaging with the slide rail groove.

[0013] Furthermore, the slide rail connector is composed of two parallel connecting plates, with a mounting hole in the center of the connecting plates. The pulley is located between the two connecting plates, and its two sides of the rotating shaft are independently inserted into the mounting hole.

[0014] Furthermore, a scale is provided on the outer wall of the circular pile mold.

[0015] This application also proposes a pile earth pressure testing method for indoor slope model tests, which involves conducting earth pressure tests on circular anti-slide piles using the aforementioned pile earth pressure testing device for indoor slope model tests, including the following steps:

[0016] Step 1: Make the round pile mold;

[0017] Step 2: Determine the location and quantity of the earth pressure cell forming system during the test according to the test requirements;

[0018] Step 3: Place the earth pressure cell forming system at the designated position on the circular pile mold;

[0019] Step 4: Determine the pile length to be simulated in the test. Repeat steps 1 to 3 to install the required number of circular pile molds and earth pressure box forming system. Then connect the circular pile molds to each other to form a whole through the pile segment connecting components.

[0020] Step 5: Connect the lead wire of the earth pressure box forming block to the data collection device. After the pile material in the round pile mold reaches the strength standard, conduct an earth pressure test and collect the earth pressure data on the pile.

[0021] Step Six: After the earth pressure test is completed, disassemble the mold and clean the disassembled mold.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. During the test, the soil pressure data inside the pile was obtained by the soil pressure cell molding block. This enabled the measurement of the soil pressure effect of the landslide on the pile body by detecting the soil pressure inside the pile. Compared with the method of directly attaching the soil pressure cell to the surface of the pile body, the stress concentration phenomenon at the soil pressure cell was eliminated during the test, which effectively improved the accuracy of the pile body internal force data obtained by the test.

[0024] 2. The device is detachable, which facilitates cleaning and maintenance and allows for flexible determination of the pile length to be simulated in the test. Furthermore, the pile mold and the soil pressure box forming system are designed separately, which facilitates the disassembly of the mold after the pile material strength reaches the maintenance standard and the soil pressure test is conducted. This makes the device highly practical and can effectively improve the efficiency of the test.

[0025] 3. The earth pressure cell forming system in this device can be flexibly deployed after determining the quantity and location according to the test requirements, which makes the invention have good versatility.

[0026] 4. This device has a simple structure, ingenious construction, and low cost, making it highly economical.

[0027] 5. The main structural materials of this device can be reused, thus meeting environmental protection requirements. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a top view of the present invention;

[0030] Figure 3 A schematic diagram of the earth pressure cell forming system;

[0031] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0032] Figure 5 This is a structural schematic diagram of the pile segment connection components;

[0033] Figure 6 This is a top view of the pile segment connection components;

[0034] Figure 7 A schematic diagram showing the connection between the earth pressure cell forming system and the pile segment connection components;

[0035] Figure 8 This is a structural schematic diagram of a circular pile mold.

[0036] The components in the diagram are as follows: 1. Earth pressure box forming system 1.1 Connecting rod 1.2 Operating handle 1.3 Central transition block 1.4 Sliding block 1.5 Earth pressure box forming block 1.6 Slide rail connector 1.6.1 Connecting plate 1.7 Pulley 2. Pile segment connecting component 2.1 Pile segment connecting block 2.2 Connecting part 2.3 Pile segment butt bolt hole 2.4 Sliding rail groove 3. Circular pile mold 3.1 Mold half 4. Pile body sealing strip 5. Scale 6. Earth pressure box guide rail. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is 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 within the protection scope of the present invention.

[0038] See appendix Figure 1 - Appendix Figure 8 This embodiment proposes a pile-earth pressure testing device for indoor slope model testing, including several circular pile molds 3 and several earth pressure box forming systems 1. Two adjacent circular pile molds 3 are connected by a pile segment connecting member 2. The earth pressure box forming system 1 includes a connecting rod 1.1 and an earth pressure box forming block 1.5. The two sides of the earth pressure box forming block 1.5 are respectively connected to one end of a connecting rod 1.1. The other end of the connecting rod 1.1 is detachably connected to the pile segment connecting member 2 (in practice, the other end of the connecting rod 1.1 can also be detachably connected to the outer wall of the circular pile mold 3 or another connecting rod 1.1). A through hole is formed on the circular pile mold 3, and the earth pressure box forming block 1.5 extends into the circular pile mold 3 through the through hole.

[0039] The pile segment connecting component 2 can be adapted to simulate pile lengths for different tests. Through the through hole formed on the circular pile mold 3, the earth pressure cell forming block 1.5 can be inserted into the circular pile mold 3 through the through hole. Thus, during the test, the earth pressure data inside the pile is obtained by the earth pressure cell forming block 1.5. This realizes the measurement of the earth pressure effect of landslide on the pile body by detecting the earth pressure inside the pile. Compared with the method of directly attaching the earth pressure cell to the surface of the pile body, it eliminates the stress concentration phenomenon at the earth pressure cell during the test and effectively improves the accuracy of the pile body internal force data obtained by the test.

[0040] like Figure 1 As shown, a scale 5 is provided on the outer wall of the circular pile mold 3. The scale 5 can be a steel ruler and is rigidly connected to the circular pile mold 3. The scale 5 can provide a reference when the earth pressure cell forming system 1 is set at the calibration position on the circular pile mold 3, thereby helping to achieve rapid positioning of the earth pressure cell forming system 1, accelerating the rapid forming of the pile earth pressure testing device, and thus improving testing efficiency.

[0041] like Figure 2 and Figure 8 As shown, the circular pile mold 3 consists of two mold halves 3.1 with the same structural shape (which serve as the mountain-side and river-side of the pile body respectively during the test). The through hole is formed between the two mold halves 3.1. The earth pressure box forming system 1 is connected between the two mold halves 3.1 to form a whole. The pile segment connecting member 2 is provided on both mold halves 3.1.

[0042] Forming the through hole between the two mold halves 3.1 reduces the difficulty of machining the through hole. Simultaneously, the two earth pressure box forming systems 1, located on either side, are connected to the pile segment connecting members 2 mounted on the two mold halves 3.1, thus connecting the two mold halves 3.1 into a single unit. During testing, no additional connecting structure is required between the two mold halves 3.1, reducing the number of components needed for the device. Furthermore, eliminating the separate connection steps between the two mold halves 3.1 effectively simplifies the testing process, making operation more convenient and improving testing efficiency.

[0043] like Figures 2-7As shown, the earth pressure box forming system 1 also includes an operating handle 1.2, a central transition block 1.3, and a sliding block 1.4. The middle part of the operating handle 1.2 is connected to two connecting rods 1.1. The inner end of the operating handle 1.2 is connected and fixed to the earth pressure box forming block 1.5 through the central transition block 1.3. The sliding blocks 1.4 are arranged on both sides of the central transition block 1.3. Earth pressure box guide rails 6 are provided on both sides of the two mold halves 3.1 on the through hole. The sliding blocks 1.4 on both sides of the central transition block 1.3 are limited to sliding within the corresponding earth pressure box guide rails 6. Pile body sealing strips 4 are inserted into the earth pressure box guide rails 6 above and below the central transition block 1.3. The pile body sealing strips 4 are made of waterproof material, such as disposable plastic rigid board. They can be connected to the round pile mold 3 along the earth pressure box guide rails 6, serving as a barrier for the round pile mold 3 to ensure the integrity of the pile body forming, and as a supporting component for the earth pressure box forming system 1 to prevent slippage of the earth pressure box forming system 1.

[0044] The central transition block 1.3 is rectangular, allowing it to effectively fit the pile body sealing strip 4, facilitating complete pile body formation. The sliding block 1.4 is rigidly connected to the earth pressure box forming block 1.5, and the sliding limit of the sliding block 1.4 is located on the corresponding earth pressure box guide rails 6 on both sides, ensuring flexible placement of the earth pressure box forming system 1. The operating handle 1.2 connects the central transition block 1.3 to the connecting rod 1.1 and facilitates the adjustment of the entire earth pressure box forming system 1 by moving it. By moving the operating handle 1.2, the sliding block 1.4 can slide up and down along the earth pressure box guide rail 6, facilitating the adjustment of the entire earth pressure box forming system 1. The specific position can be measured by the scale 5, allowing for flexible placement of the earth pressure box forming system 1. The number and position can be determined according to experimental needs, giving the invention a certain degree of versatility.

[0045] After the position is adjusted, the gap between the central transition block 1.3 and the through hole is sealed by the pile body sealing strip 4 (the pile body sealing strip 4 can be cut arbitrarily, and its length can be flexibly determined according to the intended placement of the earth pressure cell), so that the circular pile mold 3 can form a sealed pile body forming cavity, avoiding any adverse effects on the forming of the pile body. In addition, the earth pressure cell forming system 1 can be pulled out or added along the pile segment connecting component 2 and the earth pressure cell guide rail 6, which facilitates the flexible placement of the position and number of earth pressure cells during the test, and makes the device detachable.

[0046] In this embodiment, the through hole extends to the upper and lower ends of the mold half 3.1, and correspondingly, the earth pressure box guide rail 6 extends to the upper and lower ends of the mold half 3.1.

[0047] Extending the through-hole to both ends of the mold half 3.1, meaning that the through-hole is formed directly from the gap between the two mold halves 3.1 during testing, further simplifies the through-hole processing steps, making the production process of the mold half 3.1 simpler and reducing production costs. Simultaneously, because the through-hole is formed between the two mold halves 3.1, the earth pressure box guide rails 6 can be directly machined on both sides during the production of the mold half 3.1, making the production process of the earth pressure box guide rails 6 more convenient and simpler. Furthermore, using the above mechanism, the earth pressure box forming system can be flexibly arranged, and the quantity and position can be determined according to the test needs, giving the invention good versatility. During testing, the above structure also allows for easier and faster engagement between the sliding block 1.4 and the earth pressure box guide rails 6.

[0048] See appendix Figure 3 Tensile portions are formed on both sides of the sliding block 1.4, and the tensile portions form a cross-shaped structure with the sliding block 1.4. The earth pressure box guide rail 6 has a receiving groove that cooperates with the tensile portions.

[0049] When pile material is added into the circular pile mold 3, the two mold halves 3.1 will be subjected to outward compressive force, causing them to move in opposite directions. The tensile parts on both sides of the sliding block 1.4, in conjunction with the receiving groove in the earth pressure box guide rail 6, form a dual connection structure between the earth pressure box forming system 1 and the circular pile mold 3. This structure includes the tensile part of the sliding block 1.4, the earth pressure box guide rail 6, and the connecting rod 1.1 and the pile segment connecting component 2. This enhances the reliability and stability of the connection between the two mold halves 3.1. The compressive force on the mold halves 3.1 can be transmitted to the sliding block 1.4 through the tensile part, creating a tensile force opposite to the compressive force, thus improving the accuracy of the data detected by the earth pressure box forming block 1.5.

[0050] See appendix Figure 5 With appendix Figure 6 The pile segment connecting component 2 includes a pile segment connecting block 2.1. The inner sidewall of the pile segment connecting block 2.1 is fixedly connected to the circular pile mold 3 and extends to the upper and lower edges of the circular pile mold 3. The upper and lower ends of the pile segment connecting block 2.1 are bent outward and extend to form connecting parts 2.2. Pile segment butt bolt holes 2.3 are provided on both connecting parts 2.2. Two sliding rail grooves 2.4 are provided on the pile segment connecting blocks 2.1 on both sides of the connecting parts 2.2. The sliding rail grooves 2.4 extend to the upper and lower ends of the pile segment connecting block 2.1. The connecting rod 1.1 is slidably disposed in the sliding rail grooves 2.4.

[0051] During testing, bolts are inserted into the pile segment docking bolt holes 2.3 on the upper and lower connecting parts 2.2 to connect the circular pile molds 3 into a whole, allowing different circular pile molds 3 to be connected to meet the requirements of different simulated pile lengths. The sliding rail groove 2.4 allows the end of the connecting rod 1.1 to slide up and down along it. When setting up the earth pressure box forming system 1, the operating handle 1.2 of the earth pressure box forming system 1 is moved to place the earth pressure box forming system 1 at the marked position of the circular pile mold 3, thereby collecting earth pressure data at the required position.

[0052] from Figure 4 It can also be seen that a slide rail connector 1.6 is connected to the end of the connecting rod 1.1, and a pulley 1.7 is rotatably mounted on the slide rail connector 1.6. The pulley 1.7 slides in cooperation with the sliding rail groove 2.4. Specifically, the slide rail connector 1.6 is composed of two parallel connecting plates 1.6.1. A mounting hole is opened in the center of the connecting plate 1.6.1. The pulley 1.7 is located between the two connecting plates 1.6.1, and its two sides of the rotating shaft are independently inserted into the mounting hole.

[0053] The sliding track connector 1.6 is rigidly connected to the connecting rod 11, and has holes on its upper part for easy connection with the pulley 1.7. The connecting rod 1.1 and the pile segment connecting member 2 can slide freely relative to each other through the cooperation of the pulley 1.7 and the sliding rail groove 2.4. Therefore, during testing, after inserting the sliding track connector 1.6, which has pulleys 1.7 embedded on both sides, into the sliding rail groove 2.4 set in the pile segment connecting member 2, the earth pressure box forming system 1 can be easily placed at the marked position on the circular pile mold 3 by turning the operating handle 1.2. The sliding rail groove 2.4 is open to facilitate the removal and addition of the pulley 1.7 and the earth pressure box forming system 1. The slide connector 1.6 consists of two connecting plates 1.6.1, which not only facilitates the installation of pulleys 1.7, but also enhances the connection strength between the earth pressure box forming system 1 and the pile segment connecting component 2. This allows the two mold halves 3.1 to be connected and fixed by the earth pressure box forming system 1 without the need for other connecting structures, effectively simplifying the structure, reducing the implementation cost of the device, and making it more convenient to operate during testing.

[0054] The entire solution is highly feasible, with the materials and connection methods used for the components meeting current manufacturing standards. Furthermore, the entire device is a detachable, modular structure, fulfilling the mold requirements for pile forming; that is, once the pile material reaches the strength standard and undergoes earth pressure testing, the mold can be removed. During testing, data is collected by the earth pressure chamber forming block 1.5 inside the pile, avoiding stress concentration at this point. The device uses simple materials, has an ingenious structure, and is inexpensive, making it highly economical. Simultaneously, the main structural materials can be reused, meeting environmental protection requirements.

[0055] This embodiment also proposes a testing method for conducting earth pressure tests on circular anti-slide piles using the aforementioned pile earth pressure testing device for indoor slope model tests. The specific steps are as follows:

[0056] Step 1: Two mold halves 3.1, each equipped with a pile segment connecting component 2, are symmetrically arranged to form a circular pile mold 3;

[0057] Step 2: Determine the location and quantity of the earth pressure cell forming system 1 during the test according to the test requirements;

[0058] Step 3: Place the earth pressure cell forming system 1 at each designated position on the circular pile mold 3, specifically as follows:

[0059] Step 3.1: Connect the sliding block 1.4 of the earth pressure box forming system 1 with the built-in groove of the earth pressure box guide rail 6, and at the same time insert the sliding track connector 16 with the pulleys 1.7 embedded on the upper and lower sides into the corresponding sliding track groove 2.4 in the pile segment connecting component 2;

[0060] Step 3.2: Move the operating handle 1.2 to position the earth pressure box forming system 1 along the scale 5 at the marked position on the circular pile mold 3;

[0061] Step 3.3: According to the pre-determined position of the earth pressure box forming system 1, cut the pile body sealing strip 4 into different lengths, and fill the built-in groove of the earth pressure box guide rail 6 in sequence according to the order of laying the earth pressure box forming system 1 - inserting the waterproof pile body sealing strip 4 - laying the next earth pressure box forming system 1, so as to ensure the sealing of the round pile mold 3 and fix the position of the earth pressure box forming system 1.

[0062] Step 3.4: According to the test requirements, repeat the above steps to flexibly arrange the earth pressure cell forming system 1 during the test, so that it meets the required position and quantity for the test.

[0063] Step 4: Determine the pile length to be simulated in the test. Repeat steps 1 to 3 to install the required number of circular pile molds 3 and earth pressure box forming system 1. Then, insert bolts into the pile segment docking bolt holes 2.1 of the pile segment connecting component 2 to connect the circular pile molds 3 to form a whole.

[0064] Step 5: Connect the lead wire of the earth pressure box forming block 1.5 to the data collection device. After the pile material in the round pile mold 3 reaches the strength standard, conduct an earth pressure test and collect the earth pressure data on the pile.

[0065] Step Six: After the earth pressure test is completed, disassemble the mold and clean it for reuse.

[0066] The above-described testing method uses earth pressure cell molding blocks 1.5 inside the pile body to collect data during the test, which avoids stress concentration at this point. Furthermore, it allows for flexible determination of the pile length to be simulated and the flexible arrangement of the earth pressure cell molding system 1 according to test requirements, making the method highly versatile.

[0067] Although the present invention shows an example of indoor earth pressure testing of round piles, it can also be applied to earth pressure testing of antislide piles of other shapes, such as square piles and elliptical piles, by simple structural deformation (such as bending the shape of the connecting rod 1.1 according to the shape of the antislide pile).

Claims

1. A pile-earth pressure testing device for indoor slope model testing, comprising a plurality of circular pile molds (3) and a plurality of earth pressure cell forming systems (1), wherein two adjacent circular pile molds (3) are connected by pile segment connecting members (2), characterized in that: The earth pressure box forming system (1) includes a connecting rod (1.1) and an earth pressure box forming block (1.5). The two sides of the earth pressure box forming block (1.5) are respectively connected to one end of a connecting rod (1.1). The other end of the connecting rod (1.1) is detachably connected to the pile segment connecting member (2) or the outer wall of the round pile mold (3) or another connecting rod (1.1). A through hole is formed on the round pile mold (3). The earth pressure box forming block (1.5) is placed in the round pile mold (3) through the through hole. The circular pile mold (3) is composed of two mold halves (3.1) with the same structural shape. The through hole is formed between the two mold halves (3.1). The earth pressure box forming system (1) is connected between the two mold halves (3.1) to form a whole. The pile segment connecting member (2) is provided on both mold halves (3.1). The earth pressure box forming system (1) further includes an operating handle (1.2), a central transition block (1.3), and a sliding block (1.4). The middle part of the operating handle (1.2) is connected to two connecting rods (1.1). The inner end of the operating handle (1.2) is connected and fixed to the earth pressure box forming block (1.5) through the central transition block (1.3). The sliding blocks (1.4) are set on both sides of the central transition block (1.3). Earth pressure box guide rails (6) are opened on both sides of the mold halves (3.1) of the through hole. The sliding blocks (1.4) on both sides of the central transition block (1.3) are limited to sliding within the corresponding earth pressure box guide rails (6). Pile body sealing strips (4) are inserted into the earth pressure box guide rails (6) above and below the central transition block (1.3).

2. The pile-earth pressure testing device for indoor slope model testing according to claim 1, characterized in that: The through hole extends to the upper and lower ends of the mold half (3.1), and correspondingly, the earth pressure box guide rail (6) extends to the upper and lower ends of the mold half (3.1).

3. The pile-earth pressure testing device for indoor slope model tests according to claim 2, characterized in that: Tensile portions are formed on both sides of the sliding block (1.4), and the tensile portions form a cross-shaped structure with the sliding block (1.4). The earth pressure box guide rail (6) has a receiving groove that cooperates with the tensile portions.

4. The pile-earth pressure testing device for indoor slope model testing according to claim 1, characterized in that: The pile segment connecting component (2) includes a pile segment connecting block (2.1). The inner sidewall of the pile segment connecting block (2.1) is fixedly connected to the circular pile mold (3) and extends to the upper and lower edges of the circular pile mold (3). The upper and lower ends of the pile segment connecting block (2.1) are bent outward and extended to form a connecting part (2.2). Pile segment butt bolt holes (2.3) are provided on both connecting parts (2.2). Two sliding rail grooves (2.4) are provided on the pile segment connecting blocks (2.1) on both sides of the connecting part (2.2). The sliding rail grooves (2.4) extend to the upper and lower ends of the pile segment connecting block (2.1). The connecting rod (1.1) is slidably disposed in the sliding rail groove (2.4).

5. The pile-earth pressure testing device for indoor slope model testing according to claim 4, characterized in that: A slide rail connector (1.6) is connected to the end of the connecting rod (1.1), and a pulley (1.7) is rotatably mounted on the slide rail connector (1.6). The pulley (1.7) is in sliding engagement with the sliding rail groove (2.4).

6. The pile-earth pressure testing device for indoor slope model testing according to claim 5, characterized in that: The slide rail connector (1.6) consists of two parallel connecting plates (1.6.1). A mounting hole is provided in the center of the connecting plate (1.6.1). The pulley (1.7) is located between the two connecting plates (1.6.1), and its two sides of the shaft are independently inserted into the mounting hole.

7. The pile-earth pressure testing device for indoor slope model tests according to claim 1, characterized in that: A scale (5) is provided on the outer wall of the circular pile mold (3).

8. A method for testing pile earth pressure in indoor slope model tests, characterized in that, Earth pressure testing of a circular anti-slide pile is performed using the pile earth pressure testing device for indoor slope model testing as described in any one of claims 1-7, comprising the following steps: Step 1: Make a round pile mold (3); Step 2: Determine the location and quantity of the earth pressure cell forming system (1) during the test according to the test requirements; Step 3: Place the earth pressure box forming system (1) at the marked position of the circular pile mold (3); Step 4: Determine the length of the pile body to be simulated in the test. Repeat steps 1 to 3 to install the required number of round pile molds (3) and earth pressure box forming system (1) in place. Then connect the round pile molds (3) to each other to form a whole through the pile segment connecting component (2). Step 5: Connect the lead wire of the earth pressure box forming block (1.5) to the data collection device. After the pile material in the round pile mold (3) reaches the strength standard, conduct an earth pressure test and collect the earth pressure data of the pile body. Step Six: After the earth pressure test is completed, disassemble the mold and clean the disassembled mold.

Images