A detection device and method for measuring the bearing capacity of old pile foundations of transmission towers

Abstract

The present invention discloses a detection device and method for measuring the bearing capacity of an old pile foundation of a transmission tower, relates to the field of bearing capacity detection of an old pile foundation of a transmission tower, and solves the problem that the existing detection device for the bearing capacity of an old pile foundation of a transmission tower has a single detection angle and the detection results are not comprehensive and accurate enough when used. The device comprises a body, a detection mechanism, a determination mechanism and a fixing mechanism. The detection mechanism comprises a rotating ring, a mounting ring and a pulling rod. The determination mechanism comprises a roller. The present invention adjusts the position of the rotating ring through the detection mechanism, controls the pulling rod to move on the mounting ring, changes the direction and angle of the traction force on the old pile foundation, and realizes the function of all-round detection. Before the detection mechanism is operated, the determination mechanism preferentially controls the rollers on both sides to contact the outer wall of the old pile foundation and applies a driving force of a set strength. During the detection process, the stability of the old pile foundation is judged by observing the force changes of the rollers on both sides, and the body is fixed by the fixing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of detecting the bearing capacity of old pile foundations of power transmission towers, and in particular to a detection device and method for measuring the bearing capacity of old pile foundations of power transmission towers. Background Art

[0002] With the rapid development of the national economy, the power grid has become a vital component of the nation's energy infrastructure. Industrial development, production, and daily life all rely on electricity, resulting in increasingly stringent requirements for power supply. In this context, the transformation, capacity expansion, and relocation of transmission lines have become increasingly important tasks. The construction of power transmission and distribution networks must also fully consider the surrounding environment. This is especially true for those that need to traverse existing projects or areas with planning restrictions. Careful assessment and planning based on the specific circumstances are necessary to minimize environmental impacts and ensure the quality and reliability of the transmission project.

[0003] In the original demolition and reconstruction project of transmission towers, the demolition of the original tower foundation has become a more difficult problem. The existing construction technology is not able to pull out the original tower cast-in-place piles as a whole, and the demolition process is relatively cumbersome. Sometimes the old cast-in-place piles often still have good continued service performance. Therefore, when using them, it is necessary to test the bearing capacity of the old pile foundation of the transmission tower to determine whether it can continue to serve. Summary of the Invention

[0004] The purpose of the present invention is to provide a detection device and method for measuring the bearing capacity of old pile foundations of transmission towers, which is convenient for all-round and accurate detection of the bearing capacity of old pile foundations, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device for measuring the bearing capacity of an old pile foundation of a transmission tower, comprising a body, a detection mechanism, a determination mechanism, and a fixing mechanism, wherein a detection groove is provided on the body, a guide groove is provided on the upper side of the body, and the guide groove is in an arc shape, the detection mechanism comprises a rotating ring rotatably connected to the inner wall of the guide groove, a mounting ring is fixedly connected to the upper side of the rotating ring, a pulling rod is provided on the mounting ring, and the pulling rod can move on the mounting ring and adjust its position as the rotating ring rotates in the guide groove, thereby changing the traction applied to the old pile foundation. The direction and angle of the force are determined to realize the all-round detection function of the bearing capacity of the old pile foundation. The judgment mechanism includes two sets of rollers installed on the mounting ring, which are used to preferentially control the rollers on both sides to resist the outer wall of the old pile foundation and apply a pushing force of a set strength before the detection mechanism is operated. During the detection process, the stability of the old pile foundation is judged by observing the force changes of the rollers on both sides. The fixing mechanism is installed on the machine body to stably fix the machine body to the ground during detection, thereby improving the overall stability of the equipment during the detection process and facilitating all-round and accurate detection of the bearing capacity of the old pile foundation.

[0006] Preferably, the detection mechanism also includes a mounting tube installed on the mounting ring, an arc-shaped groove is opened on the upper side of the mounting ring, the pulling rod slides in contact with the inner wall of the arc-shaped groove, the mounting tube is fixedly connected to a guide frame which is slidably connected to the outer wall of the mounting ring, the bottom end of the pulling rod is fixedly connected to a connecting rope for fixing to the old pile foundation, the mounting ring is provided with an adjusting part for adjusting the position of the mounting tube, and the machine body is provided with a rotating part for controlling the rotation angle of the rotating ring, which is convenient for adjusting the position of the rotating ring and controlling the pulling rod to move on the mounting ring, thereby changing the direction and angle of the traction force on the old pile foundation and realizing the function of all-round detection.

[0007] Preferably, the adjusting member includes a driving plate fixedly mounted on the upper side of the pulling rod, the outer wall of the driving plate is slidably connected to the inner wall of the mounting tube, the side of the pulling rod is fixedly connected with a partition plate for dividing the inner wall of the mounting tube into two areas, the top of the partition plate is fixedly connected to the driving plate, the partition plate passes through the bottom of the mounting tube and is slidably connected to the mounting tube, and the mounting ring is provided with a pushing member for pushing the mounting tube to slide on the mounting ring, so as to facilitate the adjustment of the position of the mounting tube.

[0008] Preferably, the pushing member includes two groups of guide frames fixedly mounted on the mounting ring, the guide frames are used to store hydraulic oil, and the two groups of guide frames are respectively slidably connected with arc plates, the two groups of arc plates are symmetrically distributed on both sides of the mounting cylinder, and are fixedly connected to the side surfaces of the mounting cylinder, and the arc plates and the mounting cylinder are provided with connecting pipes for connecting the guide frames and the mounting cylinder, and the mounting ring is provided with a control member for controlling the hydraulic strength in the guide frames on both sides, so as to facilitate pushing the mounting cylinder to slide on the mounting ring.

[0009] Preferably, the control component includes two groups of electric telescopic rods installed in the mounting ring, two groups of liquid storage chambers are opened in the mounting ring, the two groups of electric telescopic rods are respectively fixedly installed in the liquid storage chambers on both sides, the telescopic ends of the electric telescopic rods are fixedly connected to the pressure plates that are slidably connected to the inner walls of the liquid storage chambers, and a first pipe for connecting the bottom of the liquid storage chamber and the bottom of the guide frame is opened in the mounting ring, so as to facilitate the control of the hydraulic strength in the guide frames on both sides.

[0010] Preferably, the judgment mechanism also includes two groups of guide cylinders fixedly mounted on the mounting ring, the two groups of guide cylinders are respectively located on the inner sides of the two ends of the mounting ring, a sliding rod is connected to the guide cylinder in a horizontal sliding direction, one end of the sliding rod is fixedly connected to a connecting frame, the roller is rotatably connected to the connecting frame, and a sensing member for sensing pressure changes is provided in the guide cylinder, so that before the detection mechanism is operated, the rollers on both sides are preferentially controlled to contact the outer wall of the old pile foundation and apply a pushing force of a set strength. During the detection process, the stability of the old pile foundation is judged by observing the force changes of the rollers on both sides.

[0011] Preferably, the sensing component includes a pressure sensor fixedly mounted on one end of the sliding rod, a second pipe for connecting the bottom end of the liquid storage chamber and the guide cylinder is opened in the mounting ring, a first control valve for controlling the switching state of the first pipe is provided on the mounting ring, and a second control valve for controlling the switching state of the second pipe is provided on the mounting ring, so as to facilitate sensing of pressure changes.

[0012] Preferably, the rotating part includes a driving motor fixedly mounted on the body, the output end of the driving motor is coaxially fixedly connected to a driving wheel, two sets of driven wheels are rotatably connected to the body, a transmission belt is connected between the outer wall of the driving wheel and the outer walls of the two sets of driven wheels, and the outer wall of the transmission belt is connected to the outer wall of the rotating ring, so as to facilitate controlling the rotation angle of the rotating ring.

[0013] Preferably, the fixing mechanism includes multiple groups of hydraulic push rods fixedly mounted on the body, the telescopic ends of the hydraulic push rods are fixedly connected to a support plate, and the bottom of the support plate is fixedly connected to multiple groups of anti-slip teeth, so as to facilitate the stable fixation of the body to the ground during detection, thereby improving the overall stability of the equipment during the detection process.

[0014] A method for measuring the bearing capacity of an old pile foundation of a transmission tower comprises the following steps:

[0015] S1. Move the machine to the desired position so that the old pile foundation is in the inspection groove;

[0016] S2. The body is stably connected to the ground through a fixing mechanism to improve the overall stability of the equipment during the inspection process;

[0017] S3. Fix one end of the pull rod to the top of the old pile foundation, control the rollers on both sides to resist the outer wall of the old pile foundation, and apply a set strength of pushing force;

[0018] S4. Pull the top of the old pile foundation with the pull rod, control the pull rod to move on the mounting ring, and adjust the position of the rotating ring to complete the tension test of the old pile foundation in different directions and angles, realizing the full range of testing capabilities.

[0019] S5. Determine the stability of the old pile foundation by observing the force changes on the rollers on both sides during the test.

[0020] S6. After the inspection is completed, release the connection between the pull rod and the old pile foundation, release the fixation of the fixing mechanism and the interference of the rollers on both sides with the old pile foundation, and then the machine body can be moved out.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a detection device and method for measuring the bearing capacity of old pile foundations of transmission towers, which solve the problems of existing detection devices for the bearing capacity of old pile foundations of transmission towers having a single detection angle and incomplete and inaccurate detection results. The detection mechanism adjusts the position of a rotating ring and controls the movement of a pulling rod on a mounting ring to change the direction and angle of the traction force on the old pile foundation, thereby realizing a full-range detection function. Before the detection mechanism is operated, a judgment mechanism preferentially controls the rollers on both sides to contact the outer wall of the old pile foundation and applies a driving force of a set strength. During the detection process, the stability of the old pile foundation is judged by observing the force changes on the rollers on both sides. The fixing mechanism stably fixes the machine body to the ground during detection, thereby improving the overall stability of the equipment during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the detection mechanism structure of the present invention;

[0025] Figure 3 This is a structural diagram of the fixing mechanism of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of area A in the middle;

[0027] Figure 5 It is a schematic diagram of the local structure of the rotating part of the present invention;

[0028] Figure 6 It is a schematic diagram of the partial structure of the determination mechanism of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of area B in the middle;

[0030] Figure 8 for Figure 6 Enlarged view of area C in the middle;

[0031] Figure 9 It is a cross-sectional view of the local structure of the detection mechanism of the present invention.

[0032] In the figure: 1-body; 2-detection groove; 3-guide groove; 4-detection mechanism; 5-rotating ring; 6-mounting ring; 7-pull rod; 8-determination mechanism; 9-roller; 10-fixing mechanism; 11-mounting cylinder; 12-arc groove; 13-guide frame; 14-connecting rope; 15-adjusting member; 16-rotating member; 17-driving plate; 18-partition plate; 19-pushing member; 20-guide frame; 21-arc plate; 22-connecting pipe; 23-control Component; 24-electric telescopic rod; 25-liquid storage chamber; 26-pressure plate; 27-first pipeline; 28-guide cylinder; 29-sliding rod; 30-connecting frame; 31-sensing component; 32-pressure sensor; 33-second pipeline; 34-first control valve; 35-second control valve; 36-drive motor; 37-driving wheel; 38-driven wheel; 39-transmission belt; 40-hydraulic push rod; 41-support plate; 42-anti-slip teeth; 43-old pile foundation. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figures 1-9The present invention provides a technical solution: a detection device for measuring the bearing capacity of an old pile foundation of a transmission tower, comprising a body 1, a detection mechanism 4, a determination mechanism 8 and a fixing mechanism 10. The body 1 is provided with a detection groove 2, and a guide groove 3 is provided on the upper side of the body 1. The guide groove 3 is arc-shaped. The detection mechanism 4 includes a rotating ring 5 rotatably connected to the inner wall of the guide groove 3, and a mounting ring 6 is fixedly connected to the upper side of the rotating ring 5. A pulling rod 7 is provided on the mounting ring 6. The pulling rod 7 can move on the mounting ring 6 and adjust its position as the rotating ring 5 rotates in the guide groove 3, thereby changing the direction and angle of the traction force applied to the old pile foundation 43, thereby realizing a full-dimensional detection function of the bearing capacity of the old pile foundation 43.

[0035] The judgment mechanism 8 includes two groups of rollers 9 installed on the mounting ring 6, which are used to preferentially control the rollers 9 on both sides to resist the outer wall of the old pile foundation 43 and apply a pushing force of a set strength before the detection mechanism 4 is operated. During the detection process, the stability of the old pile foundation 43 is judged by observing the force changes of the rollers 9 on both sides. The fixing mechanism 10 is installed on the machine body 1. The fixing mechanism 10 includes multiple groups of hydraulic push rods 40 fixedly installed on the machine body 1. The telescopic end of the hydraulic push rod 40 is fixedly connected to a support plate 41. The bottom of the support plate 41 is fixedly connected to multiple groups of anti-slip teeth 42, which are used to stably fix the machine body 1 to the ground during detection, thereby improving the overall stability of the equipment during the detection process.

[0036] The detection mechanism 4 also includes a mounting tube 11 installed on the mounting ring 6, an arc-shaped groove 12 is opened on the upper side of the mounting ring 6, the pull rod 7 slides and fits with the inner wall of the arc-shaped groove 12, and the mounting tube 11 is fixedly connected to a guide frame 13 that is slidably connected to the outer wall of the mounting ring 6. The bottom end of the pull rod 7 is fixedly connected to a connecting rope 14 for fixing to the old pile foundation 43. The mounting ring 6 is provided with an adjusting part 15 for adjusting the position of the mounting tube 11, and the body 1 is provided with a rotating part 16 for controlling the rotation angle of the rotating ring 5.

[0037] The adjusting member 15 includes a driving plate 17 fixedly mounted on the upper side of the pulling rod 7, the outer wall of the driving plate 17 is slidably connected to the inner wall of the mounting tube 11, and the side of the pulling rod 7 is fixedly connected with a partition plate 18 for dividing the inner wall of the mounting tube 11 into two areas. The top of the partition plate 18 is fixedly connected to the driving plate 17, the partition plate 18 passes through the bottom of the mounting tube 11 and is slidably connected to the mounting tube 11, and the mounting ring 6 is provided with a pushing member 19 for pushing the mounting tube 11 to slide on the mounting ring 6.

[0038] The pusher 19 includes two groups of guide frames 20 fixedly mounted on the mounting ring 6. The guide frames 20 are used to store hydraulic oil. The two groups of guide frames 20 are respectively slidably connected with arc plates 21. The two groups of arc plates 21 are symmetrically distributed on both sides of the mounting cylinder 11 and are fixedly connected to the side surfaces of the mounting cylinder 11. A connecting pipe 22 for connecting the guide frame 20 and the mounting cylinder 11 is provided on the arc plate 21 and the mounting cylinder 11. A control member 23 for controlling the hydraulic strength in the guide frames 20 on both sides is provided in the mounting ring 6.

[0039] The control member 23 includes two sets of electric telescopic rods 24 installed in the mounting ring 6. Two sets of liquid storage chambers 25 are opened in the mounting ring 6. The two sets of electric telescopic rods 24 are fixedly installed in the liquid storage chambers 25 on both sides. The telescopic ends of the electric telescopic rods 24 are fixedly connected to the pressure plates 26 that are slidably connected to the inner walls of the liquid storage chambers 25. A first pipe 27 is opened in the mounting ring 6 for connecting the bottom of the liquid storage chamber 25 and the bottom of the guide frame 20.

[0040] The determination mechanism 8 also includes two groups of guide cylinders 28 fixedly mounted on the mounting ring 6. The two groups of guide cylinders 28 are respectively located on the inner sides of the two ends of the mounting ring 6. A sliding rod 29 is connected to the guide cylinder 28 for sliding in the horizontal direction. One end of the sliding rod 29 is fixedly connected to a connecting frame 30. The roller 9 is rotatably connected to the connecting frame 30. A sensing member 31 for sensing pressure changes is provided in the guide cylinder 28.

[0041] The sensing member 31 includes a pressure sensor 32 fixedly mounted on one end of the sliding rod 29, a second pipe 33 for connecting the bottom end of the liquid storage chamber 25 and the guide cylinder 28 is opened in the mounting ring 6, a first control valve 34 for controlling the switching state of the first pipe 27 is provided on the mounting ring 6, and a second control valve 35 for controlling the switching state of the second pipe 33 is provided on the mounting ring 6.

[0042] The rotating member 16 includes a drive motor 36 fixedly mounted on the machine body 1. The drive motor 36 is preferably of model YYHS-40. The output end of the drive motor 36 is coaxially fixedly connected to a driving pulley 37. Two sets of driven pulleys 38 are rotatably connected to the machine body 1. The outer wall of the driving pulley 37 is transmission-connected to a transmission belt 39 that is transmission-connected to the two sets of driven pulleys 38. The outer wall of the transmission belt 39 is transmission-connected to the outer wall of the rotating ring 5. In order to ensure that the rotating ring 5 can rotate circumferentially to improve the all-round detection of the bearing capacity of the old pile foundation 43, the length of the arcuate surface where the transmission belt 39 contacts the rotating ring 5 is greater than the width of the arcuate opening at the front end of the rotating ring 5. This design ensures that even when the arcuate opening on the rotating ring 5 rotates to a position opposite to the transmission belt 39, at least one end of the rotating ring 5 can still maintain a stable transmission connection with the outer wall of the transmission belt 39, ensuring the continuity and stability of the circumferential rotation.

[0043] A method for measuring the bearing capacity of an old pile foundation of a transmission tower comprises the following steps:

[0044] S1. Move the body 1 to the desired position so that the old pile 43 is in the detection tank 2;

[0045] S2. The body 1 is stably connected to the ground by the fixing mechanism 10 to improve the overall stability of the device during the detection process;

[0046] S3. One end of the pull rod 7 is fixed to the top of the old pile 43, controlling the rollers 9 on both sides to resist the outer wall of the old pile 43, and applying a driving force of a set strength;

[0047] S4. Pull the top of the old pile 43 by pulling the pull rod 7, while controlling the pull rod 7 to move on the mounting ring 6, with the position of the rotating ring 5 adjusted, to complete the tension test of the old pile 43 in different directions and angles, to achieve full detection function;

[0048] S5 by observing the force changes on both sides of the roller 9 during the test to determine the stability of the old pile foundation 43;

[0049] S6. After the inspection is completed, the connection between the pull rod 7 and the old pile foundation 43 is released, the fixing of the fixing mechanism 10 and the interference of the rollers 9 on both sides with the old pile foundation 43 are released, and the body 1 can be moved out.

[0050] In this embodiment, the control body 1 is moved to the specified position so that the old pile foundation 43 is in the detection groove 2, and the top of the old pile foundation 43 is fixed to the pulling rod 7 by the connecting rope 14 (made of steel cable), the second control valve 35 is opened, the first control valve 34 is closed, and the electric telescopic rod 24 is controlled to push the pressure plate 26 to compress the hydraulic oil in the liquid storage chamber 25. The hydraulic oil enters the guide cylinder 28 through the second pipe 33, pushing the sliding rods 29 on both sides to move synchronously toward the old pile foundation 43 until the side of the roller 9 contacts the side wall of the old pile foundation 43. The readings of the pressure sensors 32 on both sides are observed to ensure that the initial pressure in the guide cylinders 28 on both sides is the required value, and the hydraulic push rod 40 is started to push the support plate 41 downward. The anti-slip teeth 42 are in close contact with the ground to increase friction. At the same time, it can also add counterweight to the body 1 to maintain the stability of the body 1 during the detection process.

[0051] Close the second control valve 35 and open the first control valve 34. By controlling the pushing pressure of the electric telescopic rods 24 on both sides, the pressure in the guide frames 20 on both sides is changed, so that the arc plate 21 slides to the side with lower pressure in the guide frame 20, thereby changing the position of the installation cylinder 11 and the inclination angle of the pulling rod 7. After the angle adjustment is completed, the electric telescopic rods 24 on both sides are controlled at the same time to push the pressure plate 26 to pressurize, so that the hydraulic oil can be input into the installation cylinder 11 through the connecting pipe 22, pushing the driving plate 17 to drive the pulling rod 7 to move upward, and the pulling rod 7 drives the connecting rope 14 to pull the old pile foundation 43. During the pulling process, observe the changes in the readings of the pressure sensors 32 on both sides. When the reading change is greater than the set value, it indicates that the stability of the old pile foundation 43 is poor, the offset generated when being pulled is large, and it is not stable enough. On the contrary, it means that the stability of the old pile foundation 43 is good and can be reused.

[0052] The driving motor 36 drives the active wheel 37 to rotate, and the driving belt 39 drives the driven wheels 38 on both sides to rotate. The arc length of the spacing between the driven wheels 38 is greater than the arc length of the opening position of the rotating ring 5, so that when the rotating ring 5 rotates, there is always a driven wheel 38 on one side that can push the transmission belt 39 to the outer wall of the rotating ring 5 for resistance transmission, so as to keep the rotating ring 5 stably driven to rotate, thereby driving the mounting ring 6 to rotate, so that the pulling rod 7 can be pulled in different directions. At the same time, during the pulling process, there is always a roller 9 on the pulled side to resist, completing the stability test.

[0053] After the inspection is completed, the connection between the connecting rope 14 and the old pile foundation 43 is released, the hydraulic push rod 40 lifts the support plate 41, and the electric telescopic rod 24 is pulled back to reduce the pressure in the guide frame 20. The pressure in the installation cylinder 11 is reduced, the pulling rod 7 moves downward, and the pulling on the connecting rope 14 is released. The first control valve 34 is closed, and the second control valve 35 is opened. The electric telescopic rod 24 is controlled to pull back again to reduce the pressure in the guide cylinder 28, driving the rollers 9 on both sides away from the side walls of the old pile foundation 43, and the machine body 1 can be moved out of the inspection tank 2.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A detection device for measuring the bearing capacity of old pile foundations of transmission towers, characterized in that: include: A machine body (1), wherein a detection groove (2) is provided on the machine body (1), and a guide groove (3) is provided on the upper side of the machine body (1), wherein the guide groove (3) is in an arc shape; Also includes: A detection mechanism (4), the detection mechanism (4) comprising a rotating ring (5) rotatably connected to the inner wall of the guide groove (3), a mounting ring (6) fixedly connected to the upper side of the rotating ring (5), a pulling rod (7) for pulling the old pile foundation (43) provided on the mounting ring (6), the pulling rod (7) being able to move on the mounting ring (6) and adjust its position as the rotating ring (5) rotates in the guide groove (3), thereby changing the direction and angle of the traction force applied to the old pile foundation (43), thereby realizing a full-range detection function of the bearing capacity of the old pile foundation (43); A determination mechanism (8), the determination mechanism (8) comprising two sets of rollers (9) mounted on the mounting ring (6), for preferentially controlling the rollers (9) on both sides to contact the outer wall of the old pile foundation (43) and apply a driving force of a set strength before the detection mechanism (4) operates, and during the detection process, the stability of the old pile foundation (43) is determined by observing the force changes of the rollers (9) on both sides; A fixing mechanism (10), the fixing mechanism (10) being mounted on the machine body (1) and being used to stably fix the machine body (1) to the ground during testing, thereby improving the overall stability of the device during the testing process; The detection mechanism (4) further comprises a mounting tube (11) mounted on the mounting ring (6), an arcuate groove (12) is provided on the upper side of the mounting ring (6), the pulling rod (7) is slidably fitted with the inner wall of the arcuate groove (12), a guide frame (13) is fixedly connected to the mounting tube (11) and is slidably connected to the outer wall of the mounting ring (6), a connecting rope (14) for fixing to the old pile foundation (43) is fixedly connected to the bottom end of the pulling rod (7), an adjusting member (15) for adjusting the position of the mounting tube (11) is provided on the mounting ring (6), and a rotating member (16) for controlling the rotation angle of the rotating ring (5) is provided on the machine body (1); The adjusting member (15) includes a driving plate (17) fixedly mounted on the upper side of the pulling rod (7), the outer wall of the driving plate (17) is slidably connected to the inner wall of the mounting tube (11), the side of the pulling rod (7) is fixedly connected with a partition plate (18) for dividing the inner wall of the mounting tube (11) into two areas, the top of the partition plate (18) is fixedly connected to the driving plate (17), the partition plate (18) passes through the bottom of the mounting tube (11) and is slidably connected to the mounting tube (11), and the mounting ring (6) is provided with a pushing member (19) for pushing the mounting tube (11) to slide on the mounting ring (6); The pushing member (19) includes two groups of guide frames (20) fixedly mounted on the mounting ring (6), the guide frames (20) are used to store hydraulic oil, and the two groups of guide frames (20) are respectively slidably connected with arc plates (21), the two groups of arc plates (21) are symmetrically distributed on both sides of the mounting cylinder (11), and are both fixedly connected to the side of the mounting cylinder (11), the arc plates (21) and the mounting cylinder (11) are provided with connecting pipes (22) for connecting the guide frames (20) and the mounting cylinder (11), and the mounting ring (6) is provided with a control member (23) for controlling the hydraulic strength in the guide frames (20) on both sides.

2. A detection device for measuring the bearing capacity of old pile foundations of transmission towers according to claim 1, characterized in that: The control member (23) includes two groups of electric telescopic rods (24) installed in the mounting ring (6), two groups of liquid storage chambers (25) are opened in the mounting ring (6), and the two groups of electric telescopic rods (24) are fixedly installed in the liquid storage chambers (25) on both sides respectively. The telescopic ends of the electric telescopic rods (24) are fixedly connected to the pressure plates (26) that are slidably connected to the inner walls of the liquid storage chambers (25), and a first pipe (27) is opened in the mounting ring (6) for connecting the bottom of the liquid storage chamber (25) and the bottom of the guide frame (20).

3. The detection device for measuring the bearing capacity of old pile foundations of transmission towers according to claim 2, characterized in that: The determination mechanism (8) further comprises two groups of guide cylinders (28) fixedly mounted on the mounting ring (6), the two groups of guide cylinders (28) being located on the inner sides of both ends of the mounting ring (6), respectively, a sliding rod (29) being connected in a horizontal sliding direction in the guide cylinder (28), one end of the sliding rod (29) being fixedly connected to a connecting frame (30), the roller (9) being rotatably connected to the connecting frame (30), and a sensing member (31) for sensing pressure changes being provided in the guide cylinder (28).

4. The detection device for measuring the bearing capacity of old pile foundations of transmission towers according to claim 3, characterized in that: The sensing member (31) includes a pressure sensor (32) fixedly mounted on one end of the sliding rod (29); a second pipe (33) for connecting the bottom end of the liquid storage chamber (25) and the guide cylinder (28) is provided in the mounting ring (6); a first control valve (34) for controlling the on / off state of the first pipe (27) is provided on the mounting ring (6); and a second control valve (35) for controlling the on / off state of the second pipe (33) is provided on the mounting ring (6).

5. The detection device for measuring the bearing capacity of old pile foundations of transmission towers according to claim 1, characterized in that: The rotating member (16) includes a driving motor (36) fixedly mounted on the body (1), an output end of the driving motor (36) is coaxially fixedly connected to a driving wheel (37), two sets of driven wheels (38) are rotatably connected to the body (1), a transmission belt (39) is connected between the outer wall of the driving wheel (37) and the outer walls of the two sets of driven wheels (38), and the outer wall of the transmission belt (39) is connected to the outer wall of the rotating ring (5).

6. The detection device for measuring the bearing capacity of old pile foundations of transmission towers according to claim 1, characterized in that: The fixing mechanism (10) comprises a plurality of hydraulic push rods (40) fixedly mounted on the machine body (1), the telescopic ends of the hydraulic push rods (40) being fixedly connected to support plates (41), and the bottoms of the support plates (41) being fixedly connected to a plurality of anti-slip teeth (42).

7. A method for measuring the bearing capacity of an old pile foundation of a transmission tower according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Move the machine body (1) to the desired position so that the old pile foundation (43) is in the detection groove (2); S2. Stably connecting the body (1) to the ground through the fixing mechanism (10) to improve the overall stability of the device during the detection process; S3. Fix one end of the pull rod (7) to the top of the old pile foundation (43), control the rollers (9) on both sides to resist the outer wall of the old pile foundation (43), and apply a driving force of a set strength; S4. Pull the top of the old pile foundation (43) by pulling the pull rod (7), and at the same time control the pull rod (7) to move on the mounting ring (6), and adjust the position of the rotating ring (5) to complete the tension test of the old pile foundation (43) in different directions and angles, realizing the full range of detection function; S5. By observing the force changes of the rollers (9) on both sides during the test, the stability of the old pile foundation (43) is determined; S6. After the inspection is completed, the connection between the pull rod (7) and the old pile foundation (43) is released, the fixation of the fixing mechanism (10) and the interference of the rollers (9) on both sides with the old pile foundation (43) are released, and the machine body (1) can be moved out.

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