A civil engineering pile foundation detection device

Abstract

The invention relates to the technical field of pile foundation detection in civil engineering, and discloses a pile foundation detection device in civil engineering, comprising a pile foundation to be detected, a jack is placed on the top of the pile foundation to be detected, a main beam is placed on the top of the jack, piers are respectively placed on the foundations on both sides of the pile foundation to be detected, and a gap is left between the piers and the main beam. By placing concrete blocks or other counterweight materials used for counterweight on a bearing platform, when the gravity generated by the bearing platform presses downward, the downward force amplified multiple times by a lever structure will act on the top of the main beam to facilitate load testing. Since the lever structure can amplify the gravity of the sinking of the bearing platform, when the actual pressure test of the pile foundation to be detected is carried out, a simulation test can be carried out with fewer counterweight blocks, so as to avoid the problem that a crane needs to spend a lot of time to transport the concrete blocks when a large number of concrete blocks are required for counterweight testing in conventional static load compression tests, resulting in increased costs.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering pile foundation detection, and in particular to a civil engineering pile foundation detection device. Background Art

[0002] In construction projects, it is necessary to conduct static load compression tests on samples of pile foundations driven into the ground to check the strength of the soil layer at the construction location and to check the settlement of the pile foundation per unit time under a certain load, providing an important reference for the construction project. When a static load compression test is required for a pile foundation, a pile foundation static load compression test device is usually used to test the strength of the pile foundation to ensure safety. When testing the strength of the pile foundation, it is necessary to place more concrete blocks on top of the pile foundation to continuously increase the pressure and test whether the strength of the pile foundation is sufficient. During the test, the mass of the concrete blocks is large, and the number of piled blocks is large, so the total mass is large and the height of the pile is high. Therefore, when conducting on-site inspections, a crane is needed to continuously increase or decrease the number of concrete blocks, which is not only costly but also very cumbersome.

[0003] Prior art, such as Chinese patent "CN112459139B", provides a pile foundation static load test counterweight moving device, including a support platform, a guide structure, a moving structure, a driving structure, an auxiliary structure and a limiting structure. Through the setting of the guide structure, the support platform can be moved, and the moving trajectory can be fixed, thereby avoiding directional skew when the support platform moves. Through the setting of the moving structure, the support platform can be easy to move, and the power consumed in the process of moving is relatively small. The power required for moving a large number of counterweight blocks is greatly reduced by rolling friction. Through the setting of the driving structure, the moving structure can be in a stored state when the support platform does not need to move. Through the setting of the auxiliary structure, the support platform is more convenient when stacking and unloading counterweight blocks. Through the setting of the limiting structure, the auxiliary structure can be fixed at different positions as needed.

[0004] In this solution, counterweights such as concrete blocks are placed on a movable support platform so that the pressure-applying bearing platform can be moved, thereby avoiding the problem that in the prior art, when each pile is inspected, the pressure-applying bearing platform needs to be installed first, and then the counterweights need to be placed for inspection. After each inspection is completed, when another pile is inspected, the counterweights need to be unloaded and the bearing platform needs to be disassembled for transfer. The process is cumbersome and troublesome. However, in actual use, a large number of counterweights still need to be loaded during the initial test, and since all the counterweights are placed on the movable support platform in advance, the overall weight and volume of the equipment are in a large state, which means that during the transfer process, there is a certain demand for space in the work site, and it is necessary to ensure that the huge equipment can pass smoothly. There are also certain requirements for the bearing capacity of the soil layer on the moving route to prevent ground collapse during the transfer process, resulting in certain limitations when it is actually used in some areas with soft soil or insufficient space. Summary of the invention

[0005] The purpose of the present invention is to provide a civil engineering pile foundation detection device in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A civil engineering pile foundation detection device provided by the present invention comprises a pile foundation to be tested, a jack is placed on the top of the pile foundation to be tested, a main beam is placed on the top of the jack, piers are respectively placed on the foundations on both sides of the pile foundation to be tested, two groups of piers are used to support the bottoms of both ends of the main beam, and a gap is left between the piers and the main beam;

[0008] Lower pressure plates are respectively arranged on both sides of the top of the main beam, and the bottoms of the two groups of lower pressure plates are fixedly connected to support shafts, and the two ends of the support shafts are rotatably connected to support rings, and the two groups of support rings are respectively fixedly connected to the piers on the corresponding side through multiple steel cables, and the two ends of the two groups of piers are respectively fixedly connected to the support columns at the corresponding positions through connecting beams;

[0009] The two groups of lower pressure plates are both provided with upward-swinging plates at positions away from the bottom of one end of the main beam, and the upward-swinging plates are supported by supporting columns placed on the foundation, and a bearing platform is provided on the top of the upward-swinging plates.

[0010] Preferably, the four corners of the bearing platform are respectively provided with limiting columns, and the limiting columns are connected to the four corners of the bearing platform through limiting sleeves.

[0011] Preferably, a row of guide rollers are fixedly connected to four sides of the inner wall of the limiting sleeve, and the guide rollers are in contact with the surface of the limiting column.

[0012] Preferably, one end of the lower pressure plate mounted on the top of the main beam is rotatably connected to a plurality of first moving wheels via a rotating shaft.

[0013] Preferably, the lower pressure plate is rotatably connected to the first levers on both sides near one end of the first moving wheel, the top of the main beam is fixedly connected to the position of the first lever corresponding to the limit block, and the first lever rolls in the groove opened on the limit block.

[0014] Preferably, one end of the upper rocker plate close to the bottom of the lower pressure plate is rotatably connected to a plurality of second movable wheels via a rotating shaft, and both sides of one end of the upper rocker plate close to the second movable wheel are rotatably connected to second levers, and the positions of the lower pressure plate corresponding to the second levers are fixedly connected to limiting blocks, and the second levers roll in grooves opened on the limiting blocks.

[0015] Preferably, a movable roller is fixedly connected to the top of one end of the upward-swinging plate close to the supporting platform, a support seat is fixedly connected to the bottom of the supporting platform corresponding to the position of the upward-swinging plate, and the movable roller is rollingly connected in a groove opened on the support seat.

[0016] Preferably, a columnar fulcrum is fixedly connected to the bottom of the upward-swinging plate at a position corresponding to the support column, and a groove cooperating with the columnar fulcrum is provided on the top of the support column.

[0017] Preferably, the multiple steel cables connecting the support ring and the pier are distributed in a fan shape, and the connection points at both ends of the steel cables are fixedly connected with steel plates, and steel plates are placed on the top and bottom of the jack.

[0018] Preferably, the top of the pier is trapezoidal in shape, and the main force-bearing surfaces of the lower pressing plate and the lower pressing plate are arranged in the form of evenly curved surfaces.

[0019] The beneficial effects are:

[0020] 1. The present invention places a concrete block or other counterweight material for counterweight on a bearing platform. When the gravity generated by the bearing platform presses down, it will fall to one end of the upper swing plate below. Since the fulcrum of the upper swing plate is the supporting column, based on the lever principle, the end of the upper swing plate that bears pressure is the end with a longer lever arm, that is, a labor-saving lever. The gravity of the sinking bearing platform will serve as a driving force to press down the end of the upper swing plate with a longer lever arm, so that the end of the upper swing plate with a shorter lever arm will generate a larger lifting force, and this lifting force will be transmitted to one end of the lower pressing plate. Since the other end of the lower pressing plate is placed on the top of the main beam, when the lifting force lifts one end of the lower pressing plate, the support rings arranged on both sides of the lower pressing plate remain in place under the pulling force of the steel cable to form a new support. The point makes the lower pressure plate a lever in the lever structure, and the end of the rising force is the end with a longer force arm of the lower pressure plate. Under the action of the lever principle, the end with a shorter force arm of the lower pressure plate will produce a larger downward pressure, that is, the lower pressure plate is placed on one end of the main beam, and the downward force amplified multiple times by the lever structure will act on the top of the main beam to facilitate the load test. Since the lever structure can amplify the gravity of the sinking of the bearing platform, when the actual pressure test is carried out on the pile foundation to be tested, a simulation test can be carried out with fewer counterweights to avoid the problem that a large number of concrete blocks are required for counterweight testing in conventional static load compression tests, and the crane needs to spend a lot of time to move the concrete blocks, resulting in increased costs.

[0021] 2. In the present invention, the piers and the support columns are connected by connecting beams, so that the piers and the support columns form a whole, so as to increase the contact area between the fulcrum and the foundation, thereby avoiding concentrated force in the static load compression test to cause settlement of the foundation, and this settlement may be uneven. Uneven settlement will have a serious impact on the stability of the experimental device, may cause inaccurate experimental data, and may also cause the foundation soil layer to collapse. By arranging piers on both sides of the main beam, support can be provided when the main beam is unevenly stressed and tilted, avoiding tipping, and sufficient gap is left between the piers and the main beam to meet the needs of the main beam sinking displacement during the experiment.

[0022] 3. The present invention arranges limit sleeves at the four corners of the load-bearing platform and the limit sleeves are arranged on the limit columns, so that the load-bearing platform can be kept in a horizontal state when it sinks, avoiding the situation where the counterweight material falls due to tilting. In addition, since a row of rotatable guide rollers are arranged on the four sides of the inner wall of the limit sleeve, the load-bearing platform can sink smoothly when carrying the counterweight, avoiding the situation where the friction between a certain limit sleeve and the limit column is too large, causing the load-bearing platform to tilt and the sinking of the load-bearing platform to be blocked.

[0023] 4. The trapezoidal structure at the top of the pier in the present invention can effectively disperse the pressure to the inclined surfaces on both sides. This distribution of force makes the pressure on each part of the structure relatively reduced when it is under pressure. By setting the lower pressure plate and the upper swing plate into an arc structure, the pressure can be evenly dispersed along the curve. Compared with the straight structure, when the straight structure is subjected to vertical pressure, the pressure is mainly concentrated on the supporting part below the force point, while the arc structure can make the pressure more evenly distributed on the entire structure, avoiding the situation of excessive local pressure, so as to improve the strength of the overall structure of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the overall appearance of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the jack area in the present invention;

[0027] Figure 3 It is a structural schematic diagram of the lower pressing plate area in the present invention;

[0028] Figure 4 It is a schematic structural diagram of the upper seesaw region in the present invention;

[0029] Figure 5 It is a structural schematic diagram of the lower pressing plate in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the upward seesaw in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the carrying platform in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the limiting sleeve in the present invention.

[0033] The accompanying drawings are marked as follows: 1. Pile foundation to be tested; 2. Jack; 3. Main beam; 4. Pier; 5. Lower pressure plate; 6. Support shaft; 7. Support ring; 8. Steel cable; 9. Upward plate; 10. Support column; 11. Load-bearing platform; 12. Limit sleeve; 13. Limit column; 14. First moving wheel; 15. First lever; 16. Limit block; 17. Column fulcrum; 18. Second moving wheel; 19. Second lever; 20. Moving roller; 21. Support seat; 22. Guide roller; 23. Connecting beam. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0035] See also Figure 1-Figure 8As shown, the present invention provides a civil engineering pile foundation detection device, including a pile foundation 1 to be tested, a jack 2 is placed on the top of the pile foundation 1 to be tested, a main beam 3 is placed on the top of the jack 2, piers 4 are placed on the foundations on both sides of the pile foundation 1 to be tested, and a gap is left between the piers 4 and the main beam 3, the gap needs to be larger than the sinking range of the experimental detection, the piers 4 are mainly used to provide support when the main beam 3 is tilted, and are not used as a load-bearing structure, lower pressure plates 5 are respectively set on both sides of the top of the main beam 3, the bottoms of the two groups of lower pressure plates 5 are fixedly connected to support shafts 6, and the two ends of the support shafts 6 are rotatably connected to support rings 7, the two groups of support rings 7 are respectively fixedly connected to the piers 4 on the corresponding side through a plurality of steel cables 8, and the two groups of lower pressure plates 5 are far away from the bottom of one end of the main beam 3. An upturned plate 9 is provided, and the upturned plate 9 is supported by placing support columns 10 on the foundation. A bearing platform 11 is provided on the top of the upturned plate 9. The two ends of the two groups of piers 4 are fixedly connected to the support columns 10 at corresponding positions through connecting beams 23. In this scheme, concrete blocks or other counterweight materials used for counterweights are placed on the bearing platform 11. It is necessary to ensure that the counterweights on the bearing platforms 11 on both sides are consistent to avoid inconsistent downward pressure generated by the bearing platforms 11 on both sides, which leads to uneven force on both sides of the subsequent main beam 3. When the gravity generated by the bearing platform 11 presses down, it will fall to one end of the upturned plate 9 below. Since the fulcrum of the upturned plate 9 is the support column 10, based on the lever principle (power × power arm = resistance × resistance arm), the end of the upturned plate 9 that is under pressure belongs to The end with the longer lever arm is the effort-saving lever. The gravity of the sinking of the load-bearing platform 11 will serve as the power to press down the end with the longer lever arm of the upper rocker plate 9, so that the end with the shorter lever arm of the upper rocker plate 9 will generate a larger lifting force, and this lifting force will be transmitted to one end of the lower pressure plate 5. Since the other end of the lower pressure plate 5 is placed on the top of the main beam 3, when the lifting force lifts one end of the lower pressure plate 5, the supporting rings 7 arranged on both sides of the lower pressure plate 5 remain in place to form a new fulcrum under the pulling force of the steel cable 8, so that the lower pressure plate 5 becomes a lever in the lever structure, and the end lifted by the lifting force is the end with the longer lever arm of the lower pressure plate 5. Under the action of the lever principle, the end with the shorter lever arm of the lower pressure plate 5 will generate a larger downward pressure, that is, the lower pressure plate 5 is placed on one end of the main beam 3, through the lever structure The downward force amplified by the structure multiple times will act on the top of the main beam 3 to facilitate the load test. Since the lever structure can amplify the gravity of the sinking of the bearing platform 11, when the actual pressure test is carried out on the pile foundation 1 to be tested, a simulation test can be carried out with fewer counterweights, so as to avoid the problem that a large number of concrete blocks are required for counterweight testing in conventional static load compression tests, and the crane needs to spend a lot of time to transport the concrete blocks, resulting in increased costs. In addition, since the pier 4 is connected to the support column 10 by the connecting beam 23, the pier 4 and the support column 10 form a whole to increase the contact area between the fulcrum and the foundation, thereby avoiding the concentrated force in the static load compression test to cause the foundation to settle, and this settlement may be uneven.Uneven settlement will have a serious impact on the stability of the experimental device, which may lead to inaccurate experimental data and may also cause the foundation soil layer to collapse. By setting piers 4 on both sides of the main beam 3, support can be provided when the main beam 3 is unevenly stressed and tilted to avoid tipping. There is also enough space between the piers 4 and the main beam 3 to meet the needs of the main beam 3 sinking displacement during the experiment.

[0036] In this embodiment, please refer to Figure 7 , Figure 8 The four corners of the load-bearing platform 11 are respectively provided with limit columns 13, and the limit columns 13 are connected to the four corners of the load-bearing platform 11 through the limit sleeves 12. The four sides of the inner wall of the limit sleeves 12 are respectively fixedly connected with a row of guide rollers 22, and the guide rollers 22 are in contact with the surfaces of the limit columns 13. By arranging the limit sleeves 12 at the four corners of the load-bearing platform 11 and sleeved on the limit columns 13, the load-bearing platform 11 can be kept in a horizontal state when it sinks, avoiding the situation where the counterweight material falls due to tilting. Moreover, since a row of rotatable guide rollers 22 are arranged on the four sides of the inner wall of the limit sleeves 12, the load-bearing platform 11 can sink smoothly when carrying the counterweight, avoiding the situation where the friction between a certain limit sleeve 12 and the limit column 13 is too large, and the load-bearing platform 11 is tilted, resulting in the sinking of the load-bearing platform 11 being blocked.

[0037] For further information, see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7The first lever 15 is connected to the bottom of the upper plate 5 by a plurality of second movable wheels 18, and the first lever 15 is connected to the bottom of the upper plate 5 by a plurality of second movable wheels 19. The second movable wheel 18 rolling on the lower pressure plate 5 can reduce the resistance of the upper rocker plate 9 when the position of one end of the lower pressure plate 5 in contact with the upper rocker plate 9 changes. The top of one end of the upper rocker plate 9 close to the supporting platform 11 is fixedly connected with a movable roller 20, and the bottom of the supporting platform 11 is fixedly connected with a support seat 21 corresponding to the position of the upper rocker plate 9, and the movable roller 20 is rollingly connected in the groove opened on the support seat 21. By setting the movable roller 20, when the angle of the upper rocker plate 9 changes, when the position of the end of the support seat 21 in contact with the upper rocker plate 9 changes, the movable roller 20 rolling on the support seat 21 can reduce the resistance of the upper rocker plate 9 when the position of one end of the upper rocker plate 9 changes.

[0038] For further information, see Figure 1 , Figure 6 The bottom of the upward-swinging plate 9 is fixedly connected with a columnar fulcrum 17 at a position corresponding to the support column 10, and the top of the support column 10 is provided with a groove that cooperates with the columnar fulcrum 17. By setting the contact surface between the columnar fulcrum 17 and the support column 10 in an arc contact manner, the upward-swinging plate 9 can rotate at a certain angle at the top of the support column 10, and the arc contact manner can better disperse the pressure.

[0039] Also, see Figure 1 , Figure 2 The multiple steel cables 8 connected between the support ring 7 and the pier 4 are distributed in a fan shape, and the connection points at both ends of the steel cables 8 are fixedly connected with steel plates for reinforcing the connection points. Steel plates are placed on the top and bottom of the jack 2. The main purpose of arranging steel plates on the top and bottom of the jack 2 is to increase the force-bearing area and disperse the pressure applied by the jack 2 to the pile foundation 1 to be tested and the main beam 3, so as to avoid stress concentration and damage to the pile foundation 1 to be tested or the main beam 3.

[0040] In addition, see Figure 1 , Figure 5 , Figure 6 The top of the pier 4 is in a trapezoidal shape. The trapezoidal structure can effectively disperse the pressure to the inclined surfaces on both sides. This distribution of force makes the pressure on each part of the structure relatively reduced when it is under pressure. The main force-bearing surfaces of the lower pressure plate 5 and the upper swing plate 9 are arranged in an evenly curved surface. The arc structure can evenly disperse the pressure along the curve. Compared with the straight structure, when the straight structure is subjected to vertical pressure, the pressure is mainly concentrated on the supporting part below the force point, while the arc structure can make the pressure more evenly distributed on the entire structure, avoiding the situation of excessive local pressure, so as to improve the strength of the overall structure of the equipment.

[0041] How it works

[0042] During use, clean the test site to ensure that the site is flat and solid. For soft soil foundation sites, foundation treatment may be required, such as laying a gravel cushion layer, to prevent the test results from being affected by foundation settlement during the test. Determine the position of the pile foundation 1 to be tested, and ensure that the pile head of the pile foundation 1 to be tested is exposed to a certain height above the ground to facilitate the installation of the test device. After the installation is completed, place the concrete block or other counterweight material used for counterweight on the bearing platform 11. It is necessary to ensure that the counterweights on the bearing platforms 11 on both sides are consistent to avoid the downward pressure generated by the bearing platforms 11 on both sides. The forces are inconsistent, resulting in the problem of uneven forces on both sides of the subsequent main beam 3, and by arranging limit sleeves 12 at the four corners of the bearing platform 11 and sleeved on the limit columns 13, the bearing platform 11 can be kept in a horizontal state when it sinks, and because a row of rotatable guide rollers 22 are arranged on the four sides of the inner wall of the limit sleeve 12, the bearing platform 11 can sink smoothly when carrying a counterweight. When the gravity generated by the bearing platform 11 presses down, it will fall to one end of the upward swing plate 9 below. Since the fulcrum of the upward swing plate 9 is the support column 10, the upward swing plate 9 The end of the plate 9 that is under pressure is the end with a longer lever arm, that is, a labor-saving lever. The gravity of the sinking of the load-bearing platform 11 will serve as a driving force to press down the end of the upper swing plate 9 with a longer lever arm, so that the end of the upper swing plate 9 with a shorter lever arm will generate a larger lifting force, and this lifting force will be transmitted to one end of the lower pressing plate 5. Since the other end of the lower pressing plate 5 is placed on the top of the main beam 3, when the lifting force lifts one end of the lower pressing plate 5, the support rings 7 arranged on both sides of the lower pressing plate 5 remain in place under the pulling force of the steel cable 8 to form a new fulcrum, so that the lower pressing plate 5 It becomes the lever in the lever structure, and the end of the rising force that is tilted is the end with a longer force arm of the lower pressure plate 5. Under the action of the lever principle, the end with a shorter force arm of the lower pressure plate 5 will produce a larger downward pressure, that is, the lower pressure plate 5 is placed on one end of the main beam 3. The downward force amplified multiple times by the lever structure will act on the top of the main beam 3 to facilitate the load test. Since the lever structure can amplify the gravity of the sinking of the bearing platform 11, when the actual pressure test is carried out on the pile foundation 1 to be tested, a simulation test can be carried out with fewer counterweights.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A civil engineering pile foundation detection device, comprising a pile foundation to be detected, characterized in that: A jack is placed on the top of the pile foundation to be tested, a main beam is placed on the top of the jack, piers are placed on the foundations on both sides of the pile foundation to be tested, and a gap is left between the piers and the main beam; Lower pressure plates are respectively set up on both sides of the top of the main beam, and the bottoms of the two sets of lower pressure plates are fixedly connected to support shafts, and the two ends of the support shafts are rotatably connected to support rings, and the two sets of support rings are fixedly connected to the piers on the corresponding side through multiple steel cables; The two groups of lower pressure plates are both provided with upturned plates at positions away from the bottom of one end of the main beam, and the upturned plates are supported by supporting columns placed on the foundation, and a bearing platform is provided on the top of the upturned plates, and the two ends of the two groups of piers are respectively fixedly connected to the supporting columns at the corresponding positions through connecting beams; One end of the lower pressing plate, which is mounted on the top of the main beam, is rotatably connected to a plurality of first moving wheels via a rotating shaft; The lower pressing plate is rotatably connected to the first levers on both sides near one end of the first moving wheel, and the top of the main beam corresponding to the position of the first lever is fixedly connected to the limit block, and the first lever rolls in the groove opened on the limit block; One end of the upper rocker plate near the bottom of the lower pressure plate is rotatably connected to a plurality of second moving wheels via a rotating shaft, and both sides of the upper rocker plate near one end of the second moving wheel are rotatably connected to second levers, the positions of the lower pressure plate corresponding to the second levers are fixedly connected to limiting blocks, and the second levers roll in the grooves opened on the limiting blocks.

2. A civil engineering pile foundation detection device according to claim 1, characterized in that: Limiting columns are arranged at the four corners of the bearing platform respectively, and the limiting columns are connected to the four corners of the bearing platform through limiting sleeves.

3. A civil engineering pile foundation detection device according to claim 2, characterized in that: A row of guide rollers are fixedly connected to the four sides of the inner wall of the limiting sleeve, and the guide rollers are in contact with the surface of the limiting column.

4. A civil engineering pile foundation detection device according to claim 1, characterized in that: A moving roller is fixedly connected to the top of one end of the upward-swinging plate close to the bearing platform, a supporting seat is fixedly connected to the position of the bottom of the bearing platform corresponding to the upward-swinging plate, and the moving roller is rollingly connected in a groove opened on the supporting seat.

5. A civil engineering pile foundation detection device according to claim 1, characterized in that: The bottom of the upward-swinging plate is fixedly connected with a columnar fulcrum at a position corresponding to the supporting column, and the top of the supporting column is provided with a groove matched with the columnar fulcrum.

6. A civil engineering pile foundation detection device according to claim 1, characterized in that: The multiple steel cables connecting the support ring and the pier are distributed in a fan shape, and the connection points at both ends of the steel cables are fixedly connected with steel plates, and steel plates are placed on the top and bottom of the jack.

7. A civil engineering pile foundation detection device according to claim 1, characterized in that: The top of the pier is trapezoidal in shape, and the main force-bearing surfaces of the lower pressure plate and the upper tilting plate are both curved.

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