A bored pile bottom sediment detection device and its use method

Abstract

The present invention relates to a sediment detection device for the bottom of bored cast-in-place piles and a method for using the device. The device comprises a placement plate with a detection port provided in the middle thereof and a detection rod arranged concentrically with the detection port, wherein the detection port is directly opposite to the opening of the bored cast-in-place pile body. The detection rod is outer-coated with a sleeve structure for enabling it to slide along the axis of the detection port. The detection rod comprises a contact plate 1 provided at its bottom end and a contact plate 2 provided at its top end. The contact plate 2 is in contact with a sediment thickness indicator device. The detection rod is provided with a length adjustment device. The present invention detects the thickness of sediment at the bottom of bored cast-in-place piles through a detection rod. The contact plate 1 makes the measured data more stable and less prone to wear than conventional probes. The length adjustment mechanism makes the present invention applicable to bored cast-in-place piles of different depths. The sleeve structure ensures the stability of the detection rod operation. The measuring rod and the scale serve as sediment thickness indicator devices, which are intuitive to use and effectively reduce errors.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a device for detecting sediment at the bottom of a bored cast-in-place pile and a method for using the device. Background Art

[0002] Bored and cast-in-place piles are piles created on-site by mechanical drilling, steel pipe extrusion, or manual excavation. A steel cage is then placed inside the pile and concrete is poured into the pile. Depending on the method used to create the hole, cast-in-place piles can be categorized as sunken-tube cast-in-place piles, bored-hole cast-in-place piles, and excavated-hole cast-in-place piles. Currently, bored and cast-in-place piles are widely used in various building foundation projects. They offer advantages such as wide applicability, high single-pile bearing capacity, low construction noise and vibration, and a low unit price. However, the quality of the bored piles is significantly affected by varying geological conditions, and the working environment in most construction projects can also affect the quality of the bored piles, making it difficult to monitor the quality of the bored piles. Inadequate hole cleaning or a lack of secondary hole cleaning during construction can lead to excessive sediment thickness at the pile bottom, which affects the pile's bearing capacity. Effectively controlling the sediment thickness in the pile hole is a key measure to ensure the construction quality and bearing capacity of bored and cast-in-place piles.

[0003] Existing bored cast-in-place piles need to be inspected for sediment at the bottom when in use to decide whether to continue drilling. However, existing bored cast-in-place pile bottom sediment detection devices have certain defects when in use. First, after the detection probe used to detect sediment completes the detection, some impurities will adhere to the probe surface. If it is not cleaned in time, it will cause corrosion of the probe and reduce its service life. At the same time, the existing pile bottom sediment detection device is not stable enough when in use, which can easily cause the probe to be inserted obliquely, resulting in a large deviation between the detection result and the actual situation. On the other hand, the existing bored cast-in-place pile bottom sediment detection device needs to place the probe cake into the bored cast-in-place pile when in use, and then conduct the detection. This method has too much error. In order to solve these problems, we propose a bored cast-in-place pile bottom sediment detection device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a bored pile bottom sediment detection device and a method for using the same, so as to avoid the influence of impurities on the probe surface on the next use, prevent the measurement deviation caused by the oblique insertion of the probe, and improve the stability and measurement accuracy of the probe.

[0005] The present invention solves its technical problems by adopting a technical solution: providing a sediment detection device for the bottom of a bored cast-in-place pile, comprising a placement plate with a detection port in the middle, and a detection rod arranged concentrically with the detection port, the detection port facing the opening of the bored cast-in-place pile body. The detection rod is covered with a sleeve structure that allows it to slide along the axis of the detection port. The sleeve structure is fixedly connected to a fixed upright on the top surface of the placement plate. The detection rod includes a first contact plate at its bottom end and a second contact plate at its top end. The second contact plate contacts a sediment thickness indicator. The detection rod is provided with a length adjustment device.

[0006] Furthermore, the sediment thickness indicating device includes a measuring rod with a scale arranged above the fixed vertical pole, and the measuring rod is outer-circuited with a sliding sleeve that can slide relative to the measuring rod, and the sliding sleeve contacts the top surface of the contact plate 2 through the connecting rod 2.

[0007] Furthermore, when there is no sediment and the detection rod can touch the bottom, the bottom surface of the sliding sleeve is located at the zero point position of the scale.

[0008] Furthermore, the length adjustment device is a length adjustment chassis provided in the bored pile body, the length adjustment chassis includes a small motor, the output end of the small motor is fixedly connected to a threaded screw, guide columns are provided in parallel on both sides of the threaded screw, and fixed blocks are provided at the ends of the guide columns and the threaded screw, the threaded screw and the fixed block are rotatably connected, the guide column and the fixed block are fixedly connected, the threaded screw is threadedly connected to the moving block, and the moving block is connected to the adjusting rod provided inside the detection rod through a connecting column, the contact plate is provided at the end of the adjusting rod, and the total length of the detection rod is controlled by the length adjustment chassis to be equal to the distance from the bottom surface of the bored pile body to the top surface of the sleeve structure.

[0009] Furthermore, at least four stabilizing structures are provided at the bottom of the placement plate, and the stabilizing structure includes a pad located at the bottom, and the pad is connected to the placement platform via a telescopic rod, and a spring is sleeved on the outside of the telescopic rod.

[0010] Furthermore, a fixing collar is provided on the fixed upright pole, and the sleeve structure includes a sleeve body and a connecting ring located on the outer periphery thereof, and the fixing collar is fixedly connected to the connecting ring via a connecting rod 1.

[0011] The present invention also provides a method for using any one of the above-mentioned bored pile bottom sediment detection devices, comprising the following steps:

[0012] S1, according to the depth of the bored pile body, adjusting the length of the detection rod by the length adjustment device so that it is equal to the depth of the bored pile body;

[0013] S2, placing the placement plate steadily on the top of the bored pile body;

[0014] S3, lower the detection rod until the contact plate 1 at its bottom contacts the sediment at the bottom of the bored pile body, at which time the contact plate 2 at the top of the detection rod causes the sediment thickness indicator to display the sediment thickness.

[0015] Beneficial effects

[0016] 1. The present invention can detect the thickness of the sediment at the bottom of the bored pile by providing a detection rod. When in use, the placement plate is laid on the top of the bored pile, and the depth of the detection rod is kept consistent with that of the bored pile body. When the detection rod and the contact plate 1 provided at one end thereof come into contact with the sediment inside the bored pile body, the detection rod is slidably connected to the inside of the sleeve structure, and its height changes, which can drive the contact plate 2 to move, thereby driving the sliding sleeve at one end of the contact plate 2 to slide outside the measuring rod. The thickness of the sediment can be obtained by using the moving distance of the sliding sleeve through the scale provided outside the measuring rod. In this way, the measurement error caused by the oblique insertion of the probe in the prior art can be effectively avoided.

[0017] 2. The present invention can maintain the stability of the entire device through the provision of a stabilizing structure. When in use, the stabilizing structure provided at the four corners of the bottom of the tablet, the pads provided in the internal structure of the stabilizing structure, the telescopic rod provided at the top of the pads, and the spring provided on the outside can ensure the stability of the tablet when placed. In this way, the stability of the detection rod during detection can be ensured, avoiding the situation in which the detection rod deviates during movement, thereby causing inaccurate detection results.

[0018] 3. The present invention can ensure that the depth of the bored pile body is consistent with the adjusting rod by providing an adjusting rod. The position of the adjusting rod can be adjusted by using a length adjusting box provided inside the detection rod. When in use, the small motor provided inside the length adjusting box is operated to drive the threaded screw fixedly connected to its output end to rotate, thereby driving the moving block threadedly connected to the outside of the threaded screw to move, thereby driving the adjusting rod at one end of the moving block to move in position. In this way, the overall length of the detection rod can be adjusted to meet the purpose of sediment detection for different bored pile bodies.

[0019] 4. The sleeve structure provided in the present invention can play a positive role in the stable movement of the detection rod. When in use, the detection rod can be slidably connected to the sleeve body provided in the internal structure of the sleeve structure. At the same time, the sleeve structure can be fixed to the top of the placement plate by using the connecting ring provided on the outside of the sleeve body and the fixing ring provided at one end of the connecting rod. In this way, the stability of the detection rod during movement can be effectively increased.

[0020] 5. The present invention can intuitively detect the thickness of the sediment by means of the measuring rod. When in use, the thickness of the sediment can be intuitively read by utilizing the scale provided outside the measuring rod and the position of the sliding sleeve at the horizontal position of the scale. At the same time, the thickness of the sediment can be returned to its original position after the test. In this way, the device can be easily used and read, while reducing errors in the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a bored pile bottom sediment detection device;

[0022] Figure 2 This is a schematic diagram of the front view of a sediment detection device for bored pile bottoms;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure;

[0024] Figure 4 for Figure 2 Cross-sectional view of the middle detection rod;

[0025] Figure 5 for Figure 2 Structural diagram of the medium stable structure;

[0026] Figure 6 It is a schematic cross-sectional view of a length adjustment chassis for a detection rod;

[0027] Figure 7 for Figure 1 Structural schematic diagram of the middle sleeve structure;

[0028] Figure 8 The figure is a schematic diagram of the structure of a bored pile bottom sediment detection device from an upward perspective.

[0029] In the figure: 1. bored pile body; 2. placing plate; 3. detection port; 4. fixed vertical pole; 5. fixed collar; 6. connecting rod 1; 7. sleeve structure; 701. sleeve body; 702. connecting ring; 8. detection rod; 9. measuring rod; 10. scale; 11. sliding sleeve; 12. connecting rod 2; 13. contact plate 1; 14. contact plate 2; 15. length adjustment chassis; 16. adjustment rod; 17. stabilizing structure; 1701. pad; 1702. telescopic rod; 1703. spring; 18. small motor; 19. threaded screw; 20. moving block; 21. guide column; 22. fixed block; 23. sliding groove; 24. connecting column.

[0030] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0031] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0032] like Figures 1 to 8 As shown, the present invention provides a sediment detection device for the bottom of a bored cast-in-place pile, comprising a placement plate 2 with a detection port 3 provided in the middle thereof and a detection rod 8 arranged concentrically with the detection port 3, wherein the detection port 3 is opposite to the opening of the bored cast-in-place pile body 1, and is characterized in that the detection rod 8 is outer-sheathed with a sleeve structure 7 for enabling it to slide along the axial direction of the detection port 3, the sleeve structure 7 is fixedly connected to the fixed vertical rod 4 on the top surface of the placement plate 2, the detection rod 8 comprises a contact plate 13 provided at its bottom end and a contact plate 2 14 provided at its top end, the contact plate 2 14 is in contact with a sediment thickness indicator, and the detection rod 8 is provided with a length adjustment device.

[0033] Preferably, the sediment thickness indicating device includes a measuring rod 9 with a scale 10 arranged above the fixed vertical pole 4, and the measuring rod 9 is covered with a sliding sleeve 11 that can slide relative to it, and the sliding sleeve 11 contacts the top surface of the contact plate 2 14 through the connecting rod 2 12.

[0034] Preferably, when there is no sediment and the detection rod 8 can touch the bottom, the bottom surface of the sliding sleeve 11 is located at the zero point of the scale 10. Therefore, when sediment is present, the detection rod 8 will be raised a certain distance, and the second contact plate 14 will move the sliding sleeve 11 away from the zero point by a corresponding distance. The thickness of the sediment can be easily determined by the movement distance of the sliding sleeve 11.

[0035] Preferably, Figure 3 As shown, the length adjustment device is a length adjustment chassis 15 provided in the bored pile body 1, and the length adjustment chassis 15 includes a small motor 18, and the output end of the small motor 18 is fixedly connected to a threaded screw 19, and guide columns 21 are provided in parallel on both sides of the threaded screw 19. The guide columns 21 and the ends of the threaded screw 19 are provided with fixed blocks 22, and the threaded screw 19 and the fixed block 22 are rotatably connected, and the guide columns 21 and the fixed block 22 are fixedly connected. The threaded screw 19 is threadedly connected to the moving block 20, and the moving block 20 is connected to the adjusting rod 16 provided inside the detection rod 8 through the connecting column 24. The contact plate 13 is provided at the end of the adjusting rod 16, and the length of the detection rod 8 is controlled by the length adjustment chassis 15 to be equal to the distance from the bottom surface of the bored pile body 1 to the top surface of the sleeve structure 7. In this way, the entire length of the detection rod 8 can be adjusted to meet the purpose of sediment detection on bored pile bodies 1 of different depths.

[0036] Preferably, at least four stabilizing structures 17 are provided at the bottom of the placement platform 2. The stabilizing structures 17 include a pad 1701 at the bottom, which is connected to the placement platform 2 via a telescopic rod 1702. The telescopic rod 1702 is sheathed with a spring 1703. In this way, the stability of the detection rod 8 during detection can be ensured, preventing the detection rod 8 from deviating during movement, which could lead to inaccurate detection results.

[0037] Preferably, the fixed upright pole 4 is provided with a fixing collar 5. The sleeve structure 7 includes a sleeve body 701 and a connecting ring 702 located on its outer periphery. The fixing collar 5 is fixedly connected to the connecting ring 702 via a connecting rod 6. In other embodiments, the sleeve structure 7 can also be directly fixed to the placement platform 2 via a bracket or other means. In this way, the stability of the detection rod 8 during movement can be effectively increased.

[0038] Preferably, the material of the placement plate 2 is tungsten steel, and the material of the contact plate 1 is carbon fiber, so as to further prevent the influence of impurities on the repeated use of the present invention.

[0039] Two specific embodiments are described in detail below:

[0040] Example 1:

[0041] A bored cast-in-place pile bottom sediment detection device includes a bored cast-in-place pile body 1, a placing plate 2, a fixed collar 5, a sleeve structure 7, a detection rod 8, a measuring rod 9, a scale 10, a sliding sleeve 11, a length adjustment chassis 15, an adjustment rod 16, a stabilizing structure 17 and a small motor 18. The bored cast-in-place pile body 1 is provided at the bottom end of the placing plate 2, a fixed vertical pole 4 is provided at the top of the placing plate 2, a fixed collar 5 is provided at the top of the fixed vertical pole 4, a measuring rod 9 is provided at the top of the fixed collar 5, a scale 10 is provided outside the measuring rod 9, a sleeve structure 7 is provided on one side of the fixed collar 5, a sleeve body 701 is provided in the internal structure of the sleeve structure 7, a detection rod 8 is provided in a sliding connection inside the sleeve body 701, a contact plate 2 14 is provided at the top of the detection rod 8, a contact plate 1 13 is provided at the bottom of the detection rod 8, a length adjustment chassis 15 is provided inside the detection rod 8, a small motor 18 is provided inside the length adjustment chassis 15, and the small motor 18 outputs The end is fixedly connected with a threaded screw 19, and the external thread of the threaded screw 19 is connected with a moving block 20. An adjusting rod 16 is provided at one end of the moving block 20, and the adjusting rod 16 is arranged inside the detection rod 8. A stabilizing structure 17 is provided at the bottom end of the placement plate 2, and a pad 1701 is provided in the internal structure of the stabilizing structure 17. A telescopic rod 1702 is provided on the top of the pad 1701. The telescopic rod 1702 is fixedly connected to the bottom end of the placement plate 2, and a spring 1703 is provided on the outside of the telescopic rod 1702. By using the stabilizing structure 17 provided at the four corners of the bottom end of the placement plate 2, utilizing the pad 1701 provided in the internal structure of the stabilizing structure 17, the telescopic rod 1702 provided on the top of the pad 1701 and the spring 1703 provided on the outside, the stability of the placement plate 2 when placed can be guaranteed. In this way, the stability of the detection rod 8 can be ensured when the device is detecting, and the deviation of the detection rod 8 during the movement process can be avoided, thereby avoiding the situation where the detection result is inaccurate.

[0042] In the present invention, preferably, a sliding sleeve 11 is provided outside the measuring rod 9, and the sliding sleeve 11 and the measuring rod 9 are slidably connected. A connecting rod 2 12 is provided on one side of the sliding sleeve 11, and the connecting rod 2 12 is provided on the top of the contact plate 2 14. The detection rod 8 is slidably connected to the inside of the sleeve structure 7, and its height will change, thereby driving its contact plate 2 14 to move, thereby driving the sliding sleeve 11 at one end of the contact plate 2 14 to slide outside the measuring rod 9. Through the scale 10 provided outside the measuring rod 9, the thickness of the sediment can be obtained by using the moving distance of the sliding sleeve 11.

[0043] Example 2:

[0044] A bored cast-in-place pile bottom sediment detection device includes a bored cast-in-place pile body 1, a placing plate 2, a fixed collar 5, a sleeve structure 7, a detection rod 8, a measuring rod 9, a scale 10, a sliding sleeve 11, a length adjustment chassis 15, an adjustment rod 16, a stabilizing structure 17 and a small motor 18. The bored cast-in-place pile body 1 is provided at the bottom end of the placing plate 2, a fixed vertical pole 4 is provided at the top of the placing plate 2, a fixed collar 5 is provided at the top of the fixed vertical pole 4, a measuring rod 9 is provided at the top of the fixed collar 5, a scale 10 is provided outside the measuring rod 9, a sleeve structure 7 is provided on one side of the fixed collar 5, a sleeve body 701 is provided in the internal structure of the sleeve structure 7, a detection rod 8 is provided in a sliding connection inside the sleeve body 701, a contact plate 2 14 is provided at the top of the detection rod 8, a contact plate 1 13 is provided at the bottom of the detection rod 8, a length adjustment chassis 15 is provided inside the detection rod 8, a small motor 18 is provided inside the length adjustment chassis 15, and the small motor 18 outputs The end is fixedly connected with a threaded screw 19, and the external thread of the threaded screw 19 is connected with a moving block 20. An adjusting rod 16 is provided at one end of the moving block 20, and the adjusting rod 16 is arranged inside the detection rod 8. A stabilizing structure 17 is provided at the bottom end of the placement plate 2, and a pad 1701 is provided in the internal structure of the stabilizing structure 17. A telescopic rod 1702 is provided on the top of the pad 1701. The telescopic rod 1702 is fixedly connected to the bottom end of the placement plate 2, and a spring 1703 is provided on the outside of the telescopic rod 1702. By using the stabilizing structure 17 provided at the four corners of the bottom end of the placement plate 2, utilizing the pad 1701 provided in the internal structure of the stabilizing structure 17, the telescopic rod 1702 provided on the top of the pad 1701 and the spring 1703 provided on the outside, the stability of the placement plate 2 when placed can be guaranteed. In this way, the stability of the detection rod 8 can be ensured when the device is detecting, and the deviation of the detection rod 8 during the movement process can be avoided, thereby avoiding the situation where the detection result is inaccurate.

[0045] In the present invention, preferably, a sliding sleeve 11 is provided outside the measuring rod 9, and the sliding sleeve 11 and the measuring rod 9 are slidably connected. A connecting rod 2 12 is provided on one side of the sliding sleeve 11, and the connecting rod 2 12 is provided on the top of the contact plate 2 14. The detection rod 8 is slidably connected to the inside of the sleeve structure 7, and its height will change, thereby driving its contact plate 2 14 to move, thereby driving the sliding sleeve 11 at one end of the contact plate 2 14 to slide outside the measuring rod 9. Through the scale 10 provided outside the measuring rod 9, the thickness of the sediment can be obtained by using the moving distance of the sliding sleeve 11.

[0046] In the present invention, preferably, a detection port 3 is provided at the bottom end of the placement plate 2 , and a detection rod 8 is provided inside the detection port 3 .

[0047] In the present invention, preferably, guide columns 21 are provided on the upper and lower sides of the threaded screw 19, and fixed blocks 22 are provided on one end of the guide column 21 and the threaded screw 19. The threaded screw 19 and the fixed block 22 are rotatably connected, and the guide column 21 and the fixed block 22 are fixedly connected. By operating the small motor 18 provided inside the length adjustment chassis 15, the threaded screw 19 fixedly connected to its output end can be driven to rotate, thereby driving the moving block 20 threadedly connected to the outside of the threaded screw 19 to move, thereby driving the adjusting rod 16 at one end of the moving block 20 to move in position. In this way, the overall length of the detection rod 8 can be adjusted to meet the purpose of sediment detection on different bored pile bodies 1.

[0048] The present invention also provides a method for using any one of the above-mentioned bored pile bottom sediment detection devices, comprising the following steps:

[0049] S1, according to the depth of the bored pile body 1, the length of the detection rod 8 is adjusted by the length adjustment device so that the length is equal to the depth of the bored pile body 1;

[0050] S2, placing the placement plate 2 steadily on the top of the bored pile body 1;

[0051] S3, lower the detection rod 8 until the contact plate 13 at its bottom end contacts the sediment at the bottom of the bored pile body,

[0052] At this time, the contact plate 2 14 on the top of the detection rod 8 causes the sediment thickness indicating device to show the sediment thickness.

[0053] Specifically, in combination with the embodiment, when in use, the thickness of the sediment at the bottom of the bored pile can be detected by the detection rod 8. When in use, the placement plate 2 is laid to the top of the bored pile, and the detection rod 8 is used to keep the depth consistent with the bored pile body 1. When the detection rod 8 and the contact plate 13 set at one end thereof come into contact with the sediment inside the bored pile body 1, the detection rod 8 is slidably connected to the inside of the sleeve structure 7, and its height will change, thereby driving its contact plate 2 14 to move, thereby driving the sliding sleeve 11 at one end of the contact plate 2 14 to slide outside the measuring rod 9, and the scale 10 set outside the measuring rod 9 can be used to obtain the thickness of the sediment by using the moving distance of the sliding sleeve 11. The present invention can effectively avoid the problems existing in the prior art. The stabilizing structure 17 provided can maintain the stability of the entire device. When in use, the stabilizing structure 17 provided at the four corners of the bottom end of the plate 2 is placed. The pads 1701 provided in the internal structure of the stabilizing structure 17, the telescopic rod 1702 provided at the top of the pad 1701 and the spring 1703 provided on the outside can ensure the stability of the plate 2 when placed. In this way, the stability of the detection rod 8 during detection can be ensured, and the deviation of the detection rod 8 during movement can be avoided, thereby preventing the detection result from being inaccurate. The detection rod 8 provided can ensure that it is consistent with the depth of the bored pile body 1. The length adjustment chassis 15 is provided, and the position of the adjustment rod 16 can be adjusted. When in use, the small motor 18 provided inside the length adjustment chassis 15 is operated, which can drive the threaded screw 19 fixedly connected to its output end to rotate, thereby driving the moving block 20 connected to the external thread of the threaded screw 19 to move, thereby driving the adjustment rod 16 at one end of the moving block 20 to move in position. In this way, the overall length of the detection rod 8 can be adjusted to meet the purpose of sediment detection for different bored pile bodies 1. The sleeve structure 7 provided can play a positive role in the stable movement of the detection rod 8. When in use, the sleeve body 701 provided in the internal structure of the sleeve structure 7 can make the detection rod 8 8 is slidably connected inside it. At the same time, the sleeve structure 7 can be fixed to the top of the placement plate 2 by utilizing the connecting ring 702 provided on the outside of the sleeve body 701 and the fixing ring 5 provided at one end of the connecting ring 702. In this way, the stability of the detection rod 8 when moving can be effectively increased. The thickness of the sediment can be detected intuitively by means of the measuring rod 9 provided. When in use, the scale 10 provided outside the measuring rod 9 and the position of the sliding sleeve 11 are at the horizontal position of the scale 10. While being able to read the thickness of the sediment intuitively, the sliding sleeve 11 can also be returned to its original position after the detection is completed. In this way, the device can be easily used and read, while reducing errors in the detection process.

Claims

1. A bored pile bottom sediment detection device, comprising a placement plate (2) with a detection opening (3) in the middle and a detection rod (8) arranged concentrically with the detection opening (3), wherein the detection opening (3) faces the opening of the bored pile body (1), and is characterized in that: The detection rod (8) is covered with a sleeve structure (7) for sliding along the axis of the detection port (3). The sleeve structure (7) is fixedly connected to the fixed vertical rod (4) on the top surface of the placement plate (2). The detection rod (8) includes a contact plate 1 (13) provided at its bottom end and a contact plate 2 (14) provided at its top end. The contact plate 2 (14) contacts the sediment thickness indicating device. The detection rod (8) is provided with a length adjustment device. The sediment thickness indicating device The device comprises a measuring rod (9) with a scale (10) arranged above the fixed upright pole (4); the measuring rod (9) is covered with a sliding sleeve (11) that slides relative to the measuring rod (9); the sliding sleeve (11) contacts the top surface of the contact plate (14) through the connecting rod (12); when there is no sediment and the detection rod (8) touches the bottom, the bottom surface of the sliding sleeve (11) is located at the zero point of the scale (10); the length adjustment device is arranged on the drilling grouting A length adjustment chassis (15) is provided in the injection pile body (1), wherein the length adjustment chassis (15) includes a small motor (18), an output end of the small motor (18) is fixedly connected to a threaded screw (19), guide columns (21) are provided on both sides of the threaded screw (19) in parallel, and fixed blocks (22) are provided at the ends of the guide columns (21) and the threaded screw (19), and the threaded screw (19) and the fixed block (22) are rotatably connected. The fixed blocks (22) are fixedly connected, the threaded screw (19) is threadedly connected to the moving block (20), and the moving block (20) is connected to the adjusting rod (16) provided inside the detection rod (8) through a connecting column (24). The contact plate (13) is provided at the end of the adjusting rod (16), and the total length of the detection rod (8) is controlled by the length adjustment box (15) to be equal to the distance from the bottom surface of the bored pile body (1) to the top surface of the sleeve structure (7).

2. A bored pile bottom sediment detection device according to claim 1, characterized in that: At least four stabilizing structures (17) are provided at the bottom of the placement plate (2). The stabilizing structure (17) includes a pad (1701) located at the bottom. The pad (1701) is connected to the placement plate (2) via a telescopic rod (1702). The telescopic rod (1702) is provided with a spring (1703) on the outside.

3. A bored pile bottom sediment detection device according to claim 1, characterized in that: A fixing collar (5) is provided on the fixing upright pole (4), and the sleeve structure (7) comprises a sleeve body (701) and a connecting ring (702) located on the outer periphery thereof. The fixing collar (5) is fixedly connected to the connecting ring (702) via a connecting rod (6).

4. A method for using the bored pile bottom sediment detection device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, according to the depth of the bored pile body (1), adjusting the length of the detection rod (8) by the length adjustment device so that the length is equal to the depth of the bored pile body (1); S2, placing the placement plate (2) stably on the top of the bored pile body (1); S3, lower the detection rod (8) until the contact plate 1 (13) at its bottom end contacts the sediment at the bottom of the bored pile body, at which time the contact plate 2 (14) at the top of the detection rod (8) causes the sediment thickness indicator to display the sediment thickness.

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