Drilling pile bottom sediment thickness detection device and method

Abstract

The invention provides a bored pile bottom sediment thickness detection device and method, and belongs to the technical field of bored pile detection.The bored pile bottom sediment thickness detection device comprises a lowering rod, the top end of the lowering rod is connected with a lowering machine, the bottom end of the lowering rod is lowered into a drill hole, a placement plate is arranged at the bottom end of the lowering rod, and a plurality of thickness measuring rods are arranged on the circumferential side of the placement plate in a sliding mode; the thickness measuring rods abut against the side wall of a drill hole, upper pressing plates are arranged on rod bodies of the thickness measuring rods in a sliding mode, balancing weights are arranged on the upper pressing plates, the upper pressing plates are used for abutting against the top face of sediment, graduated scales are arranged on the inner sides of the rod bodies of the thickness measuring rods in the length direction of the thickness measuring rods, and the zero points of the graduated scales are located at the bottom ends of the thickness measuring rods. The bottom end of the thickness measuring rod is used for penetrating through the interior of the sediment; a driver is arranged on the placement plate, the thickness measuring rod is arranged at the output end of the driver, and the driver drives the thickness measuring rod to move in the depth direction of the drill hole; and a camera is arranged on the bottom surface of the placement plate. According to the invention, the thickness of the hard sediment in the water-free pile foundation hole can be conveniently detected.

Description

Technical Field

[0001] The present invention relates to the technical field of bored pile detection, and in particular to a device and method for detecting sediment thickness at the bottom of a bored pile. Background Art

[0002] Bored piles are a widely used pile foundation in modern foundation engineering, and their construction quality directly affects the safety of the overall structure. During the pile foundation construction process, there are usually different degrees of hard sediments in the pile bottom area, including gravel, stones or weathered rocks. These hard sediments are difficult to completely clean up by conventional methods, and their residual thickness has a significant impact on the contact quality between the pile foundation and the bearing layer, which may lead to insufficient bearing capacity or construction hazards.

[0003] For waterless pile foundation holes, due to the lack of mud buffering effect, hard sediment is more stable and has stronger adhesion, and it is difficult to completely remove it by traditional cleaning methods such as scrapers or simple mechanical devices. In addition, due to the randomness and unevenness of the distribution of hard sediment, its thickness detection is more complicated. The currently commonly used manual detection or mechanical detection methods cannot meet the needs of hard sediment thickness detection in waterless pile foundation holes. It is difficult for construction personnel to grasp the residual state of sediment in real time, which affects the accuracy of subsequent construction.

[0004] Therefore, the research and development of detection technology and equipment for the thickness of hard sediment in waterless pile foundation holes can effectively solve the quality problems in pile foundation construction, improve the safety and construction efficiency of the project, and provide more reliable technical support for infrastructure construction. Summary of the invention

[0005] The object of the present invention is to provide a device and method for detecting the thickness of sediment at the bottom of a bored pile, which can facilitate the detection of the thickness of hard sediment in a waterless pile foundation hole.

[0006] In the first aspect, the embodiments of the present invention are implemented by the following technical solutions: A device for detecting sediment thickness at the bottom of a bored pile comprises a lowering rod, the top end of the lowering rod is connected to a lowering machine, the bottom end of the lowering rod is lowered into a borehole, a placement plate is arranged at the bottom end of the lowering rod, a plurality of thickness measuring rods are slidably arranged on the circumference of the placement plate, the plurality of thickness measuring rods respectively abut against the side walls of the borehole, an upper pressing plate is slidably arranged on the rod body of the thickness measuring rod, a counterweight is fixedly arranged on the upper pressing plate, the upper pressing plate is used to abut against the top surface of the sediment, a scale is arranged on the inner side of the rod body of each thickness measuring rod along the length of the thickness measuring rod, the zero point of the scale is located at the bottom end of the thickness measuring rod, and the bottom end of the thickness measuring rod is used to pass through the inside of the sediment; The placement plate is provided with a driver, the driver is connected to the thickness measuring rod, the thickness measuring rod is provided at the output end of the driver, and the driver drives the thickness measuring rod to move along the depth direction of the borehole so that the bottom end of the thickness measuring rod moves to the bottom of the sediment; A camera is disposed on the bottom surface of the placement plate, and the shooting direction of the camera is toward the position of the upper pressing plate located at the scale.

[0007] Furthermore, the interior of the thickness measuring rod is hollow, and a clearance opening is opened on the side of the thickness measuring rod toward the center of the borehole. A lower push rod is rotatably arranged inside the thickness measuring rod, and a rotating shaft is arranged at the bottom end of the lower push rod. A vertical cylinder is arranged at the top end of the thickness measuring rod, and the piston rod of the vertical cylinder is extended and retracted between the lower push rod and the thickness measuring rod, and the piston rod of the vertical cylinder abuts against the side surface of the lower push rod to make the top end of the lower push rod swing toward the center of the borehole until it abuts against the bottom surface of the sediment.

[0008] Furthermore, a rope is provided on the piston rod of the vertical cylinder, and the rope is sleeved on the lower push rod.

[0009] Furthermore, a top end of the lower push rod is provided with an abutment inclined surface, and the piston rod of the vertical cylinder abuts against the abutment inclined surface.

[0010] Furthermore, the driver is a motor, the output shaft of the motor is arranged in a horizontal direction, a friction wheel is arranged on the output shaft of the motor, and the friction wheel abuts against the side surface of the thickness measuring rod.

[0011] Furthermore, a friction plate is provided on the side of the thickness measuring rod, and an anti-skid pattern is provided on the surface of the friction plate, and the friction wheel abuts against the surface of the friction plate.

[0012] Furthermore, a supporting cylinder is arranged on the bottom surface of the mounting plate, a piston rod of the supporting cylinder is arranged along the diameter direction of the drill hole, a supporting block is arranged on the piston rod of the supporting cylinder, a through hole is opened through the inside of the supporting block, and the thickness measuring rod is slidably arranged in the through hole.

[0013] Furthermore, the first inner side of the through hole is close to the center of the placement plate, the second inner side of the through hole is arranged opposite to the first inner side of the through hole, the first inner side of the through hole and the second inner side of the through hole are respectively provided with an oil rubber block, a sleeve is rotatably arranged in the through hole, a rotating rod is arranged on the side of the sleeve, the rotating rod is rotatably connected to the side wall of the through hole, the thickness measuring rod is inserted into the sleeve, and the two oil rubber blocks are respectively abutted against two sides of the sleeve.

[0014] Furthermore, the bottom end of the thickness measuring rod is provided with an oblique sharp angle.

[0015] In a second aspect, the present invention discloses a method for detecting sediment thickness at the bottom of a bored pile, comprising the following steps: S1. Place the placement plate at the bottom of the borehole by lowering the machine, control the support cylinder to drive the support block to abut against the side wall of the borehole, and control the driver to insert the thickness measuring rod into the sediment until the distance between the bottom end of the thickness measuring rod and the bottom of the sediment exceeds the length of the lower push rod; S2, control the vertical cylinder to drive the top of the lower push rod to rotate around the rotation axis toward the center of the drill pipe until the lower push rod is in a horizontal state, during which the upper pressure plate will always abut against the top surface of the sediment under the action of the counterweight block; S3, control the driver to move in the reverse direction, and control the thickness measuring rod to rise until the lower push rod contacts the bottom surface of the sediment; S4. Drive the camera to take a picture of the position of the upper pressing plate on the scale to obtain the thickness of the sediment.

[0016] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: 1. The present invention places the placement plate accurately at the bottom of the borehole by lowering the machinery, and controls the supporting cylinder to drive the supporting block to abut against the side wall of the borehole, thereby ensuring the stability of the measuring tool and avoiding measurement errors. Secondly, the thickness measuring rod is inserted into the sediment through the driver, and the vertical cylinder controls the lower push rod to rotate to a horizontal state, thereby ensuring the accuracy and efficiency of the measurement. The upper pressure plate under the action of the counterweight block is always in contact with the top surface of the sediment, further enhancing the stability and reliability of the system, while simplifying the structure of the device. In addition, the camera captures the position on the scale in real time and automatically obtains the sediment thickness data, reducing manual intervention and improving work efficiency and safety. The system is adaptable to a variety of drilling environments, and is particularly suitable for sediment detection in waterless pile foundation holes. It has high accuracy and wide applicability, and greatly improves the degree of automation of the detection process and the reliability of data acquisition.

[0017] 2. The present invention significantly improves the stability and durability of the thickness measuring rod during operation by installing oil rubber blocks on the first inner side and the second inner side of the perforation of the support block respectively. The thickness measuring rod is inserted into the casing, and the rotating rod is rotatably connected to the side wall of the perforation, so that when the thickness measuring rod encounters a hard layer during its downward movement, the casing can be properly rotated under the action of the rotating rod. The oil rubber block plays a role of resetting and buffering in this process, effectively preventing the thickness measuring rod from being damaged or stuck due to collision with the hard layer. This design not only improves the safety and smoothness of the measurement process, but also greatly extends the service life of the measuring equipment, and improves the reliability and operating efficiency of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the bored pile bottom sediment thickness detection device provided by the present invention in an adjustment state; Figure 2 A schematic diagram of the device for detecting sediment thickness at the bottom of a bored pile provided by the present invention in a detection state; Figure 3 A schematic diagram of the overall structure of the device for detecting sediment thickness at the bottom of a bored pile provided by the present invention; Figure 4 It is an inverted schematic diagram of the placement plate structure of the present invention; Figure 5 It is a schematic diagram of the internal structure of the support block of the present invention; Figure 6 It is a schematic diagram of the thickness measuring rod structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged schematic diagram of part A in the middle; Figure 8 It is a schematic diagram of the internal structure of the thickness measuring rod of the present invention; Icons: 1-lowering rod, 10-placement plate, 11-camera, 12-support cylinder, 13-support block, 131-perforation, 132-oil rubber block, 133-casing, 134-rotating rod, 135-motor, 136-friction wheel, 14-thickness measuring rod, 141-friction plate, 142-giving port, 143-lower push rod, 1431-abutting inclined plane, 144-vertical cylinder, 1441-rope, 145-oblique sharp angle, 146-scale, 147-upper pressure plate, 148-counterweight, 2-drilling, 21-sediment. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment: The following is further described in conjunction with specific embodiments. Figure 1-Figure 8 As shown, a device for detecting the thickness of sediment at the bottom of a bored pile comprises a lowering rod 1, the top of which is connected to a lowering machine, which can be a drilling rig or other machine, and the bottom of the lowering rod 1 is lowered into a borehole 2. A placement plate 10 is fixed to the bottom end of the lowering rod 1 through a flange, and a plurality of thickness measuring rods 14 are slidably arranged on the circumference of the placement plate 10. In this embodiment, three thickness measuring rods 14 are arranged vertically in parallel, and the three thickness measuring rods 14 are respectively abutted against the side walls of the borehole 2 to ensure the stability and uniformity of the measurement. An upper pressing plate 147 is slidably arranged on the rod body of each thickness measuring rod 14, and a counterweight block 148 is fixedly installed on the upper pressing plate 147. The function of the counterweight block 148 is to ensure that the upper pressing plate 147 is always abutted against the top surface of the sediment 21 to avoid the displacement of the upper pressing plate 147 due to vibration or external force during the measurement process. A scale 146 is provided inside the rod body of each thickness measuring rod 14 along the length of the thickness measuring rod 14, and the zero point of the scale 146 is located at the bottom end of the thickness measuring rod 14, which facilitates accurate reading of measurement data and provides intuitive thickness information of the sediment 21. The bottom end of the thickness measuring rod 14 is used to pass through the interior of the sediment 21, so as to measure the bottom surface of the sediment 21.

[0023] It should be noted that the three thickness measuring rods 14 are independently driven, which means that each thickness measuring rod 14 can be independently adjusted according to its position, so that it can perform accurate measurements at different depths and positions in the borehole 2. Since the bottom of the sediment 21 is often not completely horizontal, the independent driving of the three thickness measuring rods 14 can ensure that each thickness measuring rod 14 can be accurately positioned according to the actual situation and measure the thickness of the sediment 21 at different positions. This design fully considers the influence of the irregularity of the sediment 21, avoids the error that may be caused by measuring only with a single thickness measuring rod 14, and ensures the reliability and accuracy of the measurement results.

[0024] A driver is provided on the placement plate 10, and the driver is connected to the thickness measuring rod 14. Specifically, the driver is provided on the casing 133, and the output end of the driver is connected to the thickness measuring rod 14. The driver controls the thickness measuring rod 14 to move along the depth direction of the borehole 2, so that the bottom end of the thickness measuring rod 14 can accurately move to the bottom of the sediment 21. The rise and fall of the thickness measuring rod 14 are precisely adjusted by the control of the driver, so as to obtain the thickness data of the sediment 21 at different positions as needed. In this way, the thickness of the entire sediment 21 layer can be fully detected.

[0025] In addition, a camera 11 is installed on the bottom surface of the placement plate 10, and the shooting direction of the camera 11 is toward the position of the upper pressing plate 147 on the scale 146. The camera 11 can be used to shoot the position of the scale 146 in real time, so as to accurately obtain the thickness data of the sediment 21 during the measurement process. In order to improve the flexibility of shooting, the camera 11 can be selected to have an adjustable direction, or use a camera 11 with multiple shooting lenses to achieve shooting functions at different angles, so as to ensure that every detail of the measurement process is monitored and accurately recorded.

[0026] Through the above structure, the present invention can use the driver to accurately control the movement of the thickness measuring rod 14 during the thickness detection of the sediment 21, and cooperate with the efficient cooperation of the upper pressing plate 147, the counterweight block 148 and the camera 11 to achieve accurate measurement of the thickness of the sediment 21. The device not only improves the accuracy and efficiency of the measurement, but also has a high level of automation, can reduce human intervention, improve work safety, and is suitable for the thickness detection of the sediment 21 in various bored pile foundation projects.

[0027] Reference Figure 6-Figure 8 As shown, the interior of the thickness measuring rod 14 is hollow, and a clearance opening 142 is provided on one side of the thickness measuring rod 14 facing the center of the borehole 2. The design of the clearance opening 142 allows the lower push rod 143 inside the thickness measuring rod 14 to be unhindered during movement and to rotate freely, thereby improving the measurement accuracy and avoiding the problem of jamming during operation.

[0028] A lower push rod 143 is rotatably installed at the lower position inside the thickness measuring rod 14, and a rotating shaft is provided at the bottom end of the lower push rod 143, which enables the lower push rod 143 to perform precise rotational movement inside the thickness measuring rod 14. The top end of the lower push rod 143 faces the center direction of the borehole 2, and its angle is adjusted by controlling the vertical cylinder 144. The vertical cylinder 144 is installed at the top end of the thickness measuring rod 14, and its piston rod can be telescoped to between the lower push rod 143 and the thickness measuring rod 14. The piston rod of the vertical cylinder 144 abuts against the side of the lower push rod 143 through a telescopic action, driving the top end of the lower push rod 143 to swing to 90 degrees toward the center direction of the borehole 2, so that the top end of the lower push rod 143 can be tightly abutted against the bottom surface of the sediment 21.

[0029] This design enables the lower push rod 143 to accurately adjust its position, thereby ensuring that its top end is always in contact with the bottom surface of the sediment 21, ensuring stable contact force during the measurement process, and preventing errors caused by poor contact during the measurement process. In addition, the telescopic action of the vertical cylinder 144 can accurately control the contact state between the lower push rod 143 and the bottom surface of the sediment 21, further improving the measurement accuracy and reliability of the thickness of the sediment 21.

[0030] Reference Figure 8As shown, a rope 1441 is fixedly mounted on the piston rod of the vertical cylinder 144, and the rope 1441 is sleeved on the lower push rod 143. The design of the rope 1441 enables the piston rod to accurately pull the lower push rod 143 through the traction of the rope 1441 during telescopic movement, and enables it to achieve smooth up and down movement. In order to improve the smoothness of the rope 1441 during the sliding process and prevent it from getting stuck or having excessive friction, a lubricating layer, such as a polytetrafluoroethylene layer (PTFE layer), can be coated on the rope 1441. The lubricating layer has an extremely low friction coefficient and can effectively reduce friction resistance, making the rope 1441 smoother during the sliding process, thereby avoiding the problem of inflexible operation or damage caused by excessive friction or getting stuck.

[0031] In addition, the design of the rope 1441 can not only ensure the precise movement of the lower push rod 143, but also can be smoothly retracted through the reverse operation of the vertical cylinder 144 under the drive of the vertical cylinder 144. When the measurement is completed, the vertical cylinder 144 reverses the action, and the rope 1441 pulls the lower push rod 143, so that the thickness measuring rod 14 can be smoothly moved up and retracted. This design avoids the problem of the lower push rod 143 being stuck due to the hardness of the sediment 21 layer or other external factors.

[0032] Reference Figure 6 and Figure 8 As shown, the top of the lower push rod 143 is provided with an abutting inclined surface 1431, and the piston rod of the vertical cylinder 144 abuts against the abutting inclined surface 1431. When the piston rod of the vertical cylinder 144 is extended and retracted, the piston rod can guide the lower push rod 143 to rotate and expand toward the center of the borehole 2 through contact with the abutting inclined surface 1431, ensuring that the top of the lower push rod 143 stably faces the bottom surface of the sediment 21, thereby achieving accurate contact and measurement. This structure effectively avoids the stuck phenomenon of the lower push rod 143 during operation, and enhances the smoothness of movement and the accuracy of control.

[0033] Reference Figure 4 and Figure 5As shown, the driver uses a motor 135 as a power source, and the motor 135 is fixedly mounted on the sleeve 133 through a mounting plate. The output shaft of the motor 135 is arranged in a horizontal direction, and a friction wheel 136 is arranged on the output shaft. Each thickness measuring rod 14 corresponds to a pair of friction wheels 136, and the friction wheels 136 are in close contact with the side of the thickness measuring rod 14 to improve the stability and accuracy of the transmission. The design of the friction wheel 136 can ensure that the thickness measuring rod 14 maintains a stable movement during the driving process, avoiding errors caused by uneven or unstable friction. In other embodiments, the driver can also use a combination of gears and racks, the rack is fixed on the thickness measuring rod 14 along the length direction of the thickness measuring rod 14, the rack is meshed with the gear, and the thickness measuring rod 14 is driven up and down by gear transmission. In addition, the driver can also use an electric cylinder or a cylinder to directly drive the thickness measuring rod 14 to move up and down, further improving the applicability and flexibility of the system.

[0034] Reference Figure 3 and Figure 6 As shown, in order to further improve the driving stability and reduce wear, a friction plate 141 is fixedly embedded on the side of the thickness measuring rod 14, and the surface of the friction plate 141 is provided with anti-skid patterns. The friction wheel 136 is in close contact with the surface of the friction plate 141, and the design of the anti-skid patterns effectively increases the friction force, ensuring that the friction wheel 136 can be firmly in contact with the thickness measuring rod 14 during the transmission process, thereby improving the transmission stability during the measurement process and avoiding sliding instability or errors caused by insufficient friction.

[0035] Reference Figure 3 and Figure 4 As shown, a support cylinder 12 is fixedly installed on the bottom surface of the placement plate 10. The piston rod of the support cylinder 12 is arranged along the diameter direction of the borehole 2 to ensure that the movement direction of the cylinder can effectively support the stability of the thickness measuring rod 14. A support block 13 is arranged on the piston rod of the support cylinder 12, and the support block 13 is used to abut against the side wall of the borehole 2 to play a fixing and supporting role, ensuring that the device can work stably inside the borehole 2 to avoid measurement errors caused by looseness or irregularity of the borehole 2 wall.

[0036] The support block 13 is provided with a through hole 131, and the thickness measuring rod 14 is slidably provided in the through hole 131, allowing the thickness measuring rod 14 to slide accurately along the direction of the borehole 2 under the guidance of the support block 13, ensuring that it smoothly passes through the sediment 21 and measures the thickness. In the specific use process, the driving action of the support cylinder 12 allows the support block 13 to be embedded into the side wall of the borehole 2. This design ensures the close contact between the support block 13 and the wall of the borehole 2, and improves the stability of the system. At the same time, due to the position and structural design of the support block 13, the thickness measuring rod 14 can be inserted from the periphery of the sediment 21, and more conveniently inserted into the sediment 21 for measurement.

[0037] This design can accurately locate the support block 13 inside the borehole 2 through the driving action of the support cylinder 12, thereby optimizing the insertion process of the thickness measuring rod 14, making the measurement operation easier and reducing the resistance and error that may occur during the insertion process. The close fit between the support block 13 and the side wall of the borehole 2 enables the thickness measuring rod 14 to maintain a stable path and measure the thickness of the sediment 21.

[0038] Reference Figure 4 and Figure 5 As shown, the first inner side of the through hole 131 is close to the center of the placement plate 10, the second inner side of the through hole 131 is arranged opposite to the first inner side of the through hole 131, and an oil rubber block 132 is respectively arranged on the first inner side of the through hole 131 and the second inner side of the through hole 131, and a sleeve 133 is rotatably arranged in the through hole 131, and a rotating rod 134 is welded on the side of the sleeve 133, and the rotating rod 134 is rotatably connected to the side wall of the through hole 131, and the rotating rod 134 is arranged horizontally, and the thickness measuring rod 14 is slidably inserted in the sleeve 133, and the two oil rubber blocks 132 are respectively abutted against the two sides of the sleeve 133. When the thickness measuring rod 14 is strongly blocked by a hard object during its downward movement and insertion, the sleeve 133 can be driven to rotate accordingly, thereby ensuring the stable movement of the thickness measuring rod 14 in the borehole 2. Due to the presence of the oil rubber block 132 , when the sleeve 133 rotates, the oil rubber block 132 will be compressed and deformed, thereby providing a certain resistance, effectively alleviating the friction resistance, and preventing the thickness measuring rod 14 from being stuck or damaged.

[0039] Reference Figure 2 and Figure 6 As shown, the bottom end of the thickness measuring rod 14 is provided with an oblique angle 145, and the oblique angle 145 is designed to have a guiding function, so that the thickness measuring rod 14 can be more easily inserted into the outer peripheral side of the sediment 21. During the insertion process, the oblique angle 145 helps to guide the thickness measuring rod 14 to accurately pass through the outer layer of the sediment 21, avoiding deviation or jamming during the insertion process, thereby improving the accuracy of the thickness measurement of the sediment 21 and the simplicity of operation.

[0040] In addition, the present invention discloses a method for detecting the thickness of sediment 21 at the bottom of a bored pile 2, comprising the following steps: S1, placing the placement plate 10 at the bottom of the borehole 2 by lowering the machine, controlling the support cylinder 12 to drive the support block 13 to abut against the side wall of the borehole 2, and controlling the driver to insert the thickness measuring rod 14 into the sediment 21 until the distance between the bottom end of the thickness measuring rod 14 and the bottom of the sediment 21 exceeds the length of the lower push rod 143; S2, control the vertical cylinder 144 to drive the top of the lower push rod 143 to rotate around the rotation axis toward the center of the drill pipe until the lower push rod 143 is in a horizontal state, during which the upper pressure plate 147 is always in contact with the top surface of the sediment 21 under the action of the counterweight block 148; S3, controlling the driver to move in the reverse direction, controlling the thickness measuring rod 14 to rise, until the lower push rod 143 abuts against the bottom surface of the sediment 21; S4. Drive the camera 11 to take a picture of the position of the upper pressing plate 147 on the scale 146 to obtain the thickness of the sediment 21.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for detecting sediment thickness at the bottom of a bored pile, characterized in that: The invention comprises a lowering rod (1), the top end of which is connected to a lowering machine, the bottom end of which is lowered into a borehole (2), the bottom end of which is provided with a placement plate (10), a plurality of thickness measuring rods (14) being slidably arranged on the peripheral side of the placement plate (10), the plurality of thickness measuring rods (14) respectively abutting against the side walls of the borehole (2), and an upper pressure rod (14) being slidably arranged on the rod body of the thickness measuring rod (14). A plate (147) is provided, a counterweight (148) is fixedly arranged on the upper pressing plate (147), the upper pressing plate (147) is used to abut against the top surface of the sediment, a scale (146) is arranged inside the rod body of each thickness measuring rod (14) along the length of the thickness measuring rod (14), the zero point of the scale (146) is located at the bottom end of the thickness measuring rod (14), and the bottom end of the thickness measuring rod (14) is used to pass through the inside of the sediment; The placement plate (10) is provided with a driver, the driver is connected to the thickness measuring rod (14), the thickness measuring rod (14) is arranged at the output end of the driver, and the driver drives the thickness measuring rod (14) to move along the depth direction of the borehole (2) so that the bottom end of the thickness measuring rod (14) moves to the bottom of the sediment; A camera (11) is disposed on the bottom surface of the placement plate (10), and the shooting direction of the camera (11) is toward the upper pressing plate (147) and is located at the position of the scale (146).

2. The device for detecting sediment thickness at the bottom of bored piles according to claim 1, characterized in that: The thickness measuring rod (14) is hollow inside. A clearance opening (142) is provided on one side of the thickness measuring rod (14) facing the center of the borehole (2). A lower push rod (143) is rotatably provided inside the thickness measuring rod (14). A rotating shaft is provided at the bottom end of the lower push rod (143). A vertical cylinder (144) is provided at the top end of the thickness measuring rod (14). The piston rod of the vertical cylinder (144) is telescoped between the lower push rod (143) and the thickness measuring rod (14). The piston rod of the vertical cylinder (144) abuts against the side surface of the lower push rod (143) so that the top end of the lower push rod (143) swings toward the center of the borehole (2) until it abuts against the bottom surface of the sediment.

3. The device for detecting sediment thickness at the bottom of bored piles according to claim 2, characterized in that: A sleeve rope (1441) is arranged on the piston rod of the vertical cylinder (144), and the sleeve rope (1441) is sleeved on the lower push rod (143).

4. The device for detecting sediment thickness at the bottom of bored piles according to claim 2, characterized in that: The top end of the lower push rod (143) is provided with an abutment inclined surface (1431), and the piston rod of the vertical cylinder (144) abuts against the abutment inclined surface (1431).

5. The device for detecting sediment thickness at the bottom of bored piles according to claim 1, characterized in that: The driver is a motor (135), the output shaft of the motor (135) is arranged in a horizontal direction, a friction wheel (136) is arranged on the output shaft of the motor (135), and the friction wheel (136) abuts against the side surface of the thickness measuring rod (14).

6. The device for detecting sediment thickness at the bottom of bored piles according to claim 5, characterized in that: A friction plate (141) is provided on the side of the thickness measuring rod (14), the surface of the friction plate (141) is provided with anti-skid patterns, and the friction wheel (136) abuts against the surface of the friction plate (141).

7. The device for detecting sediment thickness at the bottom of bored piles according to claim 1, characterized in that: A supporting cylinder (12) is arranged on the bottom surface of the placement plate (10), and a piston rod of the supporting cylinder (12) is arranged along the diameter direction of the borehole (2). A supporting block (13) is arranged on the piston rod of the supporting cylinder (12), and a through hole (131) is formed through the interior of the supporting block (13), and the thickness measuring rod (14) is slidably arranged in the through hole (131).

8. The device for detecting sediment thickness at the bottom of bored piles according to claim 7, characterized in that: The first inner side of the through hole (131) is close to the center of the placement plate (10), the second inner side of the through hole (131) is arranged opposite to the first inner side of the through hole (131), the first inner side of the through hole (131) and the second inner side of the through hole (131) are respectively provided with an oil rubber block (132), a sleeve (133) is rotatably arranged in the through hole (131), a rotating rod (134) is arranged on the side of the sleeve (133), and the rotating rod (134) is rotatably connected to the side wall of the through hole (131), the thickness measuring rod (14) is inserted into the sleeve (133), and the two oil rubber blocks (132) are respectively abutted against two sides of the sleeve (133).

9. The device for detecting sediment thickness at the bottom of bored piles according to claim 1, characterized in that: The bottom end of the thickness measuring rod (14) is provided with an oblique sharp corner (145).

10. A detection method for the sediment thickness detection device at the bottom of a bored pile according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the placement plate (10) at the bottom of the borehole (2) by means of a lowering machine, control the support cylinder (12) to drive the support block (13) to abut against the side wall of the borehole (2), and control the driver to insert the thickness measuring rod (14) into the sediment until the distance between the bottom end of the thickness measuring rod (14) and the bottom of the sediment exceeds the length of the lower push rod (143); S2, controlling the vertical cylinder (144) to move, driving the top end of the lower push rod (143) to rotate around the rotation axis toward the center of the drill rod (2), until the lower push rod (143) is in a horizontal state, during which the upper pressure plate (147) will always abut against the top surface of the sediment under the action of the counterweight block (148); S3, controlling the driver to move in the reverse direction, controlling the thickness measuring rod (14) to rise until the lower push rod (143) contacts the bottom surface of the sediment; S4. Drive the camera (11) to take a picture of the position of the upper pressing plate (147) on the scale (146) to obtain the thickness of the sediment.

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