Device and method for detecting the thickness of sediment at the bottom of bored piles

Abstract

This invention discloses a device and method for detecting the thickness of sediment at the bottom of bored piles. The device comprises a sediment-collecting cylinder with graduations and an observation window at its bottom, and a detachably connected lower probe assembly at the top. A movable flap, rotatably mounted at the bottom of the sediment-collecting cylinder, closes the lower opening of the cylinder under the drive of a drive cable, thus sealing the lower end of the cylinder and trapping the sediment at the bottom of the pile inside. Inspectors can observe the sediment inside the cylinder through the observation window, allowing for accurate estimation of the sediment thickness at the bottom of the pile borehole. This invention solves the problem of misjudging the sediment thickness at the bottom of piles using traditional methods.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a device and method for detecting the thickness of sediment at the bottom of bored cast-in-place piles. Background Technology

[0002] Pile foundation engineering is a common type of foundation in industrial and civil building engineering. When shallow foundations on natural ground cannot meet the requirements of building for foundation deformation and strength, deep foundations can be designed by using the underlying hard soil or rock layers as the bearing layer of the foundation, among which pile foundations are the most commonly used.

[0003] As a type of deep foundation, pile foundations have the characteristics of high bearing capacity, good stability, small and uniform settlement, rapid settlement stabilization, and good seismic performance, and are therefore widely used in various construction projects.

[0004] Pile foundation engineering is generally divided into two types: end-bearing piles and friction piles. Before concrete pouring, both types of piles have specific requirements regarding the thickness of the sediment at the bottom of the hole: end-bearing piles should not exceed 100mm, and friction piles should not exceed 300mm. The thickness of the sediment affects not only the end resistance but also the lateral resistance, making the control of sediment thickness in pile foundation engineering crucial.

[0005] The traditional method for detecting the thickness of sediment at the bottom of piles mainly involves operators lowering a weight down into the pile hole using a rope and measuring the change in gravity to determine the location of the sediment surface. While this method of judging the location of the sediment surface by touch has some reference value, it is extremely prone to errors and can easily lead to misjudgments of the sediment thickness at the bottom of the pile.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, a device and method for detecting the thickness of sediment at the bottom of bored cast-in-place piles are provided to solve the problem that traditional methods for detecting the thickness of sediment at the bottom of piles are prone to misjudging the thickness of sediment at the bottom of piles.

[0008] To achieve the above objectives, a device for detecting the thickness of sediment at the bottom of bored cast-in-place piles is provided, comprising:

[0009] An adjustable-length probe assembly, wherein the probe assembly has a perforation;

[0010] The slag-collecting cylinder has an observation hole on its side wall, which is set along the length of the slag-collecting cylinder. A light-transmitting plate is installed inside the observation hole. A scale line is set on the outer side of the side wall of the slag-collecting cylinder, which is set along the length of the slag-collecting cylinder. The slag-collecting cylinder has two opposite open ends, one of which is detachably connected to the lower probe assembly.

[0011] A movable flap, one side of which is rotatably mounted on one side of the other open end, and the other side of which is flipped upward and attached to one side wall of the slag removal cylinder, wherein an elastic clamp is installed on the side wall and the elastic clamp presses against the other side of the movable flap.

[0012] A driving cable is provided. A first cable tube is installed vertically on the other side wall of the slag-collecting cylinder. The driving cable is movably inserted through the first cable tube. One end of the driving cable extends outside the lower port of the first cable tube. One end of the driving cable crosses the other open end and is connected to the other side of the movable flap. The other end of the driving cable extends out of the upper port of the first cable tube. After the slag-collecting cylinder sinks to the bottom of the pile hole, the other end of the driving cable is pulled upward to cause one end of the driving cable to flip the movable flap downward, so that the movable flap closes the other open end.

[0013] Furthermore, a pivot is installed on the outer edge of the other open end, and one side of the movable flap is connected to the pivot.

[0014] Furthermore, a steering roller is installed on the outer edge of the other open end. The steering roller is arranged in the same direction as the rotating shaft. The steering roller and the rotating shaft are respectively arranged on opposite sides of the other open end. The steering roller is arranged below the first cable tube, and the drive cable is wound around the steering roller.

[0015] Furthermore, the steering roller is a magnetic roller, the movable flap is a magnetic metal plate, and the steering roller is magnetically attracted to the movable flap.

[0016] Furthermore, the probe assembly includes multiple coaxially arranged pipe sections and a connecting sleeve, wherein the connecting sleeve is detachably connected to two adjacent pipe sections.

[0017] Furthermore, the two ends of the connecting sleeve are formed with external threads, and the two ends of the pipe section are formed with external threads. The two ends of the connecting sleeve are respectively threaded to the ends of two adjacent pipe sections.

[0018] Furthermore, the end of the tube section at one end of the lower probe assembly is formed with an internal thread, and the open end is formed with an external thread, and the tube section at one end of the lower probe assembly is threadedly connected to the open end.

[0019] Furthermore, a second cable tube is connected to the outer side wall of the tube section for the other end of the drive cable to be movably inserted, and the second cable tube is arranged along the axial direction of the tube section.

[0020] This invention provides a detection method for a device for detecting the thickness of sediment at the bottom of bored cast-in-place piles, comprising the following steps:

[0021] Place the probe assembly into the pile hole;

[0022] Adjust the length of the lower probe assembly so that the other open end of the slag removal cylinder sinks to the bottom of the pile hole;

[0023] After the sediment at the bottom of the pile hole enters the zero-one port of the slag removal cylinder, the other end of the drive cable is pulled upward to cause one end of the drive cable to flip the movable flap downward, so that the movable flap closes the other opening end.

[0024] Remove the slag removal cylinder from the pile hole;

[0025] The thickness of the sediment at the bottom of the hole is determined by observing the thickness of the sediment inside the sediment through the light-transmitting plate and scale lines of the sediment removal cylinder.

[0026] The beneficial effect of this invention is that the borehole pile bottom sediment thickness detection device of this invention has a sediment collection tube with a scale and an observation window at its bottom, and a lower probe assembly is detachably connected to the top of the sediment collection tube. A movable flap, rotatably mounted at the bottom of the sediment collection tube, closes the lower opening of the tube under the drive of a drive cable, thereby achieving the closure of the lower port of the sediment collection tube, leaving the pile bottom sediment inside the tube. Inspectors can observe the sediment condition inside the tube through the observation window, thus accurately estimating the sediment thickness at the bottom of the pile hole. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of the borehole pile bottom sediment thickness detection device according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the probe assembly according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram showing the open state of the other port of the slag removal cylinder according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram showing the closed state of the other port of the slag removal cylinder according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram showing the usage status of the borehole pile bottom sediment thickness detection device according to an embodiment of the present invention. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Reference Figures 1 to 5 As shown, the present invention provides a device for detecting the thickness of sediment at the bottom of a bored cast-in-place pile, comprising: a probe assembly 1, a sediment scooping cylinder 2, a movable flap 3, and a drive cable 4.

[0036] The length of the probe assembly 1 is adjustable. The probe assembly 1 has a through hole. In this embodiment, the lower end of the probe assembly is located through the through hole.

[0037] The slag-collecting cylinder 2 is coaxially arranged with the lower probe assembly. An observation hole is provided on the side wall of the slag-collecting cylinder 2. The observation hole is positioned along the length of the slag-collecting cylinder 2. A light-transmitting plate 21 is installed inside the observation hole. Graduation lines are provided on the outer side of the side wall of the slag-collecting cylinder 2. The graduation lines are positioned along the length of the slag-collecting cylinder 2. The slag-collecting cylinder 2 has two opposing open ends. One open end is detachably connected to the lower probe assembly 1.

[0038] The movable flap 3 is circular. The outer diameter of the movable flap is larger than the outer diameter of the slag removal cylinder.

[0039] Specifically, one side of the movable flap 3 is rotatably mounted on one side of the other open end. The other side of the movable flap 3 flips upward and fits against one side wall of the slag removal cylinder 2. An elastic clamp 22 is installed on one side wall. The elastic clamp 22 presses against the other side of the movable flap 3.

[0040] The drive cable 4 is a sturdy cotton rope or steel wire rope.

[0041] A first cable tube 23 is installed on the other side wall of the slag removal cylinder 2. The first cable tube 23 is vertically arranged. A drive cable 4 is movably inserted through the first cable tube 23. One end of the drive cable 4 extends beyond the lower port of the first cable tube 23. One end of the drive cable 4 crosses the other open end and is connected to the other side of the movable flap 3. The other end of the drive cable 4 extends beyond the upper port of the first cable tube 23.

[0042] After the slag removal cylinder 2 sinks to the bottom of the pile hole 5, the other end of the drive cable 4 is pulled upward to cause one end of the drive cable 4 to flip the movable flap 3 downward, so that the movable flap 3 closes the other opening end.

[0043] After the movable flap closes the other opening end of the slag removal cylinder (i.e., the lower opening end of the slag removal cylinder), the sediment at the bottom of the pile hole is also left inside the slag removal cylinder. Then, the slag removal cylinder is removed from the pile hole, and the mud and water in the lower probe assembly above the slag removal cylinder can flow out through the perforation of the lower probe assembly, thus allowing the sediment to remain inside the slag removal cylinder. After the slag removal cylinder is removed from the pile hole, the inspector can directly obtain the thickness value of the sediment at the bottom of the pile hole through the light-transmitting plate and scale lines of the slag removal cylinder, thus enabling a relatively accurate detection of the sediment thickness at the bottom of the pile hole.

[0044] As a preferred implementation method, see [reference]. Figure 3 and Figure 4 As shown, the slag removal cylinder is cylindrical. A rotating shaft is installed on the outer edge of the other open end of the slag removal cylinder. One side of the movable flap 3 is connected to the rotating shaft.

[0045] In this embodiment, the movable flap is hinged to the rotating shaft. A steering roller 24 is installed on the outer edge of the other open end of the slag-collecting cylinder. The steering roller 24 is arranged in the same direction as the rotating shaft. The steering roller 24 and the rotating shaft are respectively located on opposite sides of the other open end of the slag-collecting cylinder. The steering roller 24 is located below the first cable tube 23. The drive cable 4 is wound around the steering roller 24.

[0046] One end of the drive cable is arranged radially along the slag-removing cylinder and connected to the side of the movable flap away from the rotating shaft.

[0047] In a preferred embodiment, the steering roller 24 is a magnetic roller. The movable flap 3 is a magnetic metal plate. The steering roller 24 is magnetically attracted to the movable flap 3. After the drive cable flips the movable flap downwards, the steering roller is magnetically attracted to the movable flap, causing the movable flap to fit tightly against the other opening end of the slag removal cylinder, thereby sealing the other opening end of the slag removal cylinder.

[0048] Combined Figure 1 and Figure 2 As shown, the probe assembly 1 includes multiple coaxially arranged pipe sections 11 and a connecting sleeve 12. The connecting sleeve 12 is detachably connected to two adjacent pipe sections 11.

[0049] In this embodiment, please continue to refer to Figure 2 As shown, the two ends of the connecting sleeve 12 are formed with external threads. The two ends of the pipe section 11 are formed with external threads. The two ends of the connecting sleeve 12 are respectively threaded to the ends of two adjacent pipe sections 11.

[0050] In a preferred embodiment, the end of the tube segment 11 at one end of the probe assembly 1 is formed with an internal thread. An open end is formed with an external thread. The tube segment 11 at one end of the probe assembly 1 is threadedly connected to the open end.

[0051] A second cable tube 13 is connected to the outer side wall of pipe section 11. The second cable tube 13 is used for the other end of the drive cable 4 to be movably threaded through. The second cable tube 13 is arranged along the axial direction of pipe section 11. In this embodiment, the second cable tubes of multiple pipe sections are arranged coaxially. The drive cable is movably threaded through the second cable tubes of multiple pipe sections and extends out of the pile hole. During inspection, the inspector pulls the drive cable outside the pile hole to close the lower opening end of the slag removal cylinder.

[0052] This invention provides a detection method for a device for detecting the thickness of sediment at the bottom of bored cast-in-place piles, comprising the following steps:

[0053] S1: Place the probe assembly 1 into the pile hole 5.

[0054] S2: Adjust the length of the probe assembly 1 so that the other open end of the slag removal tube 2 sinks to the bottom of the pile hole 5.

[0055] Specifically, the number of pipe sections is determined based on the depth of the pile hole. Multiple pipe sections are slowly spliced ​​and lowered, causing the lower opening of the slag removal cylinder to sink to the bottom of the pile hole.

[0056] S3: After the sediment 6 at the bottom of the pile hole 5 enters the zero and one ports of the slag removal cylinder 2, pull the other end of the drive cable 4 upward to make one end of the drive cable 4 flip the movable flap 3 downward, so that the movable flap 3 closes the other opening end.

[0057] S4: Remove the slag removal cylinder 2 from the pile hole 5.

[0058] S5: The thickness of the sediment in the slag tube 2 is determined by observing the thickness of the sediment 6 at the bottom of the hole through the light-transmitting plate 21 and the scale line of the slag tube 2.

[0059] The present invention relates to a device for detecting the thickness of sediment at the bottom of bored piles. The bottom of the device is a sediment-collecting cylinder with graduations and an observation window. A lower probe assembly is detachably connected to the top of the sediment-collecting cylinder. A movable flap, rotatably mounted at the bottom of the sediment-collecting cylinder, closes the lower opening of the cylinder under the drive of a drive cable, thereby sealing the lower port of the cylinder and leaving the sediment at the bottom of the pile inside. Inspectors can observe the sediment inside the cylinder through the observation window, thus accurately estimating the thickness of the sediment at the bottom of the pile hole.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A device for detecting the thickness of the pile bottom sediment of a cast-in-place bored pile, characterized by, include: An adjustable-length probe assembly, wherein the probe assembly has a perforation; The slag-collecting cylinder has an observation hole on its side wall, which is set along the length of the slag-collecting cylinder. A light-transmitting plate is installed inside the observation hole. A scale line is set on the outer side of the side wall of the slag-collecting cylinder, which is set along the length of the slag-collecting cylinder. The slag-collecting cylinder has two opposite open ends, one of which is detachably connected to the lower probe assembly. A movable flap, one side of which is rotatably mounted on one side of the other open end, and the other side of which is flipped upward and attached to one side wall of the slag removal cylinder, wherein an elastic clamp is installed on the side wall and the elastic clamp presses against the other side of the movable flap. A driving cable is provided. A first cable tube is installed vertically on the other side wall of the slag removal cylinder. The driving cable is movably inserted in the first cable tube. One end of the driving cable extends outside the lower port of the first cable tube. One end of the driving cable crosses the other open end and is connected to the other side of the movable flap. The other end of the driving cable extends out of the upper port of the first cable tube. After the slag removal cylinder sinks to the bottom of the pile hole, the other end of the driving cable is pulled upward to cause the one end of the driving cable to flip the movable flap downward, so that the movable flap closes the other open end. A pivot is installed on the outer edge of the other open end, and one side of the movable flap is connected to the pivot. A steering roller is installed on the outer edge of the other open end. The steering roller is arranged in the same direction as the rotating shaft. The steering roller and the rotating shaft are respectively arranged on opposite sides of the other open end. The steering roller is arranged below the first cable tube. The drive cable is wound around the steering roller. The steering roller is a magnetic roller, the movable flap is a magnetic metal plate, and the steering roller is magnetically attracted to the movable flap; The probe assembly includes multiple pipe sections arranged coaxially and a connecting sleeve, wherein the connecting sleeve is detachably connected to two adjacent pipe sections.

2. The device for detecting the thickness of sediment at the bottom of bored piles according to claim 1, characterized in that, The connecting sleeve has external threads at both ends, and the pipe section has external threads on the outside at both ends. The two ends of the connecting sleeve are respectively threaded to the ends of two adjacent pipe sections.

3. The device for detecting the thickness of sediment at the bottom of bored piles according to claim 1, characterized in that, The end of the tube section at one end of the probe assembly has an internal thread, and the open end has an external thread. The tube section at one end of the probe assembly is threadedly connected to the open end.

4. The device for detecting the thickness of sediment at the bottom of bored piles according to claim 1, characterized in that, A second cable tube is connected to the outer side wall of the tube section for the other end of the drive cable to be movably inserted. The second cable tube is arranged along the axial direction of the tube section.

5. A method for detecting the thickness of sediment at the bottom of a bored pile as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Place the probe assembly into the pile hole; Adjust the length of the lower probe assembly so that the other open end of the slag removal cylinder sinks to the bottom of the pile hole; After the sediment at the bottom of the pile hole enters the other end of the slag removal cylinder, the other end of the drive cable is pulled upward to cause one end of the drive cable to flip the movable flap downward, so that the movable flap closes the other opening end. Remove the slag removal cylinder from the pile hole; The thickness of the sediment at the bottom of the hole is determined by observing the thickness of the sediment inside the sediment through the light-transmitting plate and scale lines of the sediment removal cylinder.

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