A structure and method for detecting the verticality of cast-in-place pile holes.

Abstract

This invention discloses a structure and method for detecting the verticality of cast-in-place pile boreholes. The structure includes a bottom support, a measuring component, a support assembly, a pull wire, a detector, and a wire-pulling device. The bottom support is connected to the support assembly, the measuring component is connected to the support assembly via the pull wire, one end of the pull wire is connected to the wire-pulling device, and the detector and wire-pulling device are mounted on the support assembly. The structure of this invention is relatively simple. The bottom support, measuring component, and support assembly can be made from waste materials from the construction site, improving the utilization rate of waste materials. The pull wire and wire-pulling device restrict the descent of the measuring component. As the pull wire handle pulls the measuring ring upwards, the readings of the detector on inclined supports A and B are used to determine whether the verticality of the cast-in-place pile borehole meets the requirements. By comparing the readings of the detector before and after the test, this detection structure can accurately determine the verticality of the borehole, reduce engineering defects, and prevent disasters.

Description

Technical Field

[0001] This invention belongs to the field of verticality detection technology, and particularly relates to a structure and method for detecting the verticality of cast-in-place piles. Background Technology

[0002] Currently, borehole inspection methods include drill pipe inclination measurement, hammer (ball) inclination measurement, and inclinometers. The drill pipe inclination measurement method suffers from several drawbacks: difficulty in determining the orientation, the ease of placing the eccentric wedge but the difficulty of removal, and the necessity of diameter reduction after placing the eccentric wedge. The hammer (ball) inclination measurement method is challenging in high-rise buildings and confined spaces, and is significantly affected by weather conditions. Inclinometers, only one depth and one axis can be measured simultaneously, requiring data export and conversion, resulting in a lengthy measurement cycle. Therefore, a borehole verticality structure that is unaffected by weather, time, borehole depth, and other factors is needed, while also enabling accurate measurement and real-time readings.

[0003] Patent document CN106595444A discloses a method for measuring the verticality of rotary drilling pile holes. The method involves adding a reinforcing bar at the center of the bottom of a reinforcing cage and placing a vertically upward-facing lifting ring at the center of the reinforcing bar. One end of a thin rope is fixed to a float, and the other end of the rope is passed through the lifting ring and pulled to the top of the pile hole. The reinforcing cage is then lowered into the rotary drilling pile hole. Mud is added to the hole, and the other end of the rope is pulled so that the float floats precisely on the surface of the mud in the hole, keeping the rope taut. A crosshair scale is set up along the direction of the pile arrangement, with its center located at the top center of the rotary drilling pile hole. The deviation direction of the bottom center point of the rotary drilling pile and the distance the center point of the float deviates from the X and Y axes of the crosshair scale are obtained, thus calculating the verticality of the rotary drilling pile hole. This patent calculates perpendicularity by reading a cross-shaped ruler. The accuracy of the perpendicularity calculation can be affected by factors such as human observation or the precision of the scale.

[0004] Patent document CN111220089A discloses a device for detecting the shape and verticality of pile foundation boreholes. The device includes a guide frame structure, a lifting rod mechanism, a detector, and a terminal processing display. The guide frame structure is positioned above the borehole, and the lifting rod mechanism is fixed via the guide frame structure. The detector is installed at the bottom of the lifting rod mechanism, and a laser receiver and laser emitter are respectively installed at the top and bottom of the lifting rod mechanism. The lifting rod mechanism is assembled from a circular tube with a waterproof structure. The detector includes a mounting column, and a distance sensor is fixedly installed at the outer end of the piston rod of a first waterproof electric telescopic rod. The distance sensor, the first waterproof electric telescopic rod, the laser receiver, and the laser emitter are all electrically connected to the terminal processing display via cables. In this design, the terminal processing display fits the three-dimensional spatial shape of the pile hole based on the drilling depth and radial distance changes in several directions, and automatically calculates the verticality of the pile foundation. This patented device has a high manufacturing cost, and the transportation and storage of precision instruments require even more cost. It cannot be manufactured locally using readily available materials in rudimentary construction sites, resulting in low flexibility in its use. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a structure and method for detecting the verticality of cast-in-place pile holes.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a structure for detecting the verticality of a bored pile, comprising a bottom support, a measuring component, a support assembly, a guy wire, a detector, and a wire-pulling device. The bottom support is connected to the support assembly, the measuring component is connected to the support assembly via the guy wire, one end of the guy wire is connected to the wire-pulling device, and the detector and the wire-pulling device are mounted on the support assembly.

[0008] Preferably, the support assembly includes diagonal brace A, diagonal brace B, horizontal brace and diagonal brace C. One side of the horizontal brace is connected to diagonal brace A, and the other side of the horizontal brace is connected to diagonal brace B. Both ends of the horizontal brace are connected to the bottom support member. Two diagonal braces C are provided. The tops of diagonal brace A, diagonal brace B and the two diagonal braces C are connected to each other. A guy wire is connected to the horizontal brace.

[0009] Preferably, pulleys are provided on the diagonal brace A, diagonal brace B and horizontal cross brace respectively, and a channel is provided on the side of the horizontal cross brace near the bottom support member, through which the pull wire slides and passes.

[0010] Preferably, the pull wires include pull wire A, pull wire B and pull wire C. Pull wire A passes through a channel through one side of the horizontal cross brace and is slidably connected to a pulley on the diagonal brace A and a pulley on the horizontal cross brace in sequence. Pull wire B passes through a channel through the other side of the horizontal cross brace and is slidably connected to a pulley on the diagonal brace B and a pulley on the horizontal cross brace in sequence.

[0011] Preferably, the bottom support is L-shaped, with a vertical groove on one side and a channel at the bottom, through which the pull wire passes. The measuring element is annular.

[0012] Preferably, an elastic element is provided on the bottom support member, one end of which is connected to the bottom support member and the other end of which is connected to the support assembly.

[0013] Preferably, the wire-pulling device includes a wire-clamping box, a wire-clamping groove, and a wire-pulling handle. The wire-clamping box is connected to the support assembly, the wire-clamping groove is disposed inside the wire-clamping box, and the wire passes through the wire-clamping box and the wire-clamping groove before being connected to the wire-pulling handle.

[0014] Preferably, the detector is connected to the support assembly via a fixed baffle. The detector includes a goniometer A and a goniometer B. A connecting member is provided on the measuring component, and the connecting member is arranged in a cross shape on the measuring component.

[0015] A method for using a drilling verticality detection structure for cast-in-place piles includes the following steps:

[0016] S1: Measure the diameter and depth of the foundation pit for the cast-in-place pile, and make a measuring piece that fits the inner wall of the foundation pit according to the size of the foundation pit;

[0017] S2: Fabricate diagonal brace A, diagonal brace B, horizontal brace and diagonal brace C, and complete the connection of the support components. Set the bottom of diagonal brace C on the soil layer.

[0018] S3: Set the bottom support on the soil layer, set the horizontal brace in the vertical groove, and then install the elastic element;

[0019] S4: Install the pulleys on the diagonal brace A, diagonal brace B and horizontal cross brace respectively;

[0020] S5: Install the wire pulling device, then install wire A, wire B and wire C, connect the goniometer A to the diagonal brace A through the fixed baffle, and connect the goniometer B to the diagonal brace B through the fixed baffle;

[0021] S6: Determine whether the installation position, accuracy and elevation of each part meet the design requirements. If they do not meet the requirements, the above installation steps must be repeated until the calibration and installation are qualified and the installation of the test structure is completed.

[0022] S7: After installation, record the initial readings of angle measuring instruments A and B. Unlock the wire-pulling device to allow the measuring piece to descend into the bored pile hole. When the measuring piece is at the bottom, middle, and top of the bored pile hole, record the readings of angle measuring instruments A and B respectively. Take the average of the three measurements at each position and compare the error value of the average value with the initial data. Check whether the error is less than or equal to the standard or design value. If it is less than the standard or design value, the bored pile hole is deemed qualified. If it is not qualified, use hole repair or other remedial measures until the verticality of the bored pile hole is qualified.

[0023] Preferably, in step S4, the outer tangent of the pulley on the diagonal brace A is flush with the end of one end of the horizontal cross brace, and the outer tangent of the pulley on the diagonal brace B is flush with the end of the other end of the horizontal cross brace. A pulley is provided on each side of the center point of the horizontal cross brace.

[0024] In step S5, pull wire A and pull wire B have the same length, pull wire C is directly connected to the measuring piece and does not contact the pulley, and the connection points of pull wire A, pull wire B and pull wire C to the pull wire handle are all on the same side of the pull wire handle.

[0025] The beneficial effects of this invention are as follows:

[0026] The structure of this invention is relatively simple. The bottom support, measuring component, and support assembly can be made from waste materials from the construction site, improving the utilization rate of waste materials. The measuring component is lowered by a pull line and a draw line device. As the pull line handle pulls the measuring ring upwards through pull lines A, B, and C, the readings of the detectors on the inclined supports A and B are used to determine whether the verticality of the bored pile meets the requirements. By comparing the readings of the detectors before and after the changes, this detection structure can accurately determine the verticality of the bored pile, improving project quality, reducing defects, and preventing disasters.

[0027] The structure of this invention can be fabricated on-site and reused. It features fast measurement speed and is especially suitable for deep foundation pit projects in large projects with high requirements for hole verticality. It can improve hole quality, indirectly improve pouring quality, and provide a guarantee for the safety of later project operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the detection process of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the bottom support structure of the present invention;

[0032] Figure 5 This is a flowchart of the detection process of the present invention.

[0033] In the diagram: 1-soil layer, 2-bottom support, 201-vertical groove, 3-elastic component, 4-angle measuring instrument A, 5-angle measuring instrument B, 6-wire clamping box, 7-wire clamping groove, 8-pull wire handle, 9-through fixed baffle, 10-pull wire A, 11-pull wire B, 12-pull wire C, 13-pulley, 14-measuring component, 141-connector, 142-connecting line, 15-diagonal brace A, 16-diagonal brace B, 17-horizontal brace, 18-diagonal brace C, 19-channel. Detailed Implementation

[0034] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0035] Example:

[0036] like Figures 1 to 5 As shown, a verticality detection structure for cast-in-place pile holes includes a bottom support 2, a measuring component 14, a support assembly, a guy wire, a detector, and a wire-pulling device. The bottom support 2 is connected to the support assembly, the measuring component 14 is connected to the support assembly via a guy wire, one end of the guy wire is connected to the wire-pulling device, and the detector and the wire-pulling device are mounted on the support assembly.

[0037] The support assembly includes diagonal brace A15, diagonal brace B16, horizontal brace 17, and diagonal brace C18. One side of the horizontal brace 17 is welded to diagonal brace A15, and the other side of the horizontal brace 17 is welded to diagonal brace B16. Both ends of the horizontal brace 17 are connected to the bottom support 2. Two diagonal braces C18 are provided. The top ends of diagonal brace A15, diagonal brace B16, and the two diagonal braces C18 are welded to each other. A guy wire is connected to the horizontal brace 17.

[0038] Pullers 13 are respectively provided on the diagonal brace A15, diagonal brace B16 and horizontal cross brace 17. A channel 19 is provided on the side of the horizontal cross brace 17 near the bottom support 2. The pull wire passes through the channel 19 and slides through the horizontal cross brace 17.

[0039] The pull wires include pull wire A10, pull wire B11, and pull wire C12. Pull wire A10 passes through the channel 19 through one side of the horizontal cross brace 17 and is slidably connected to pulleys 13 on the diagonal brace A15 and the horizontal cross brace 17 in sequence. Pull wire B11 passes through the channel 19 through the other side of the horizontal cross brace 17 and is slidably connected to pulleys 13 on the diagonal brace B16 and the horizontal cross brace 17 in sequence. One end of each of pull wires A10, B11, and C12 passes through the wire clamping box 6 and the wire clamping groove 7 and is connected to the pull wire handle 8. The other end of each of pull wires A10, B11, and C12 is connected to the measuring element 14. Pull wires A10 and B11 are connected to both sides of the measuring component 14, and pull wire C12 is connected to the connector 141 on the measuring component. Pull wire C12 is positioned above the center point of connector 141. Connector 141 has four connecting wires 142, which are fastened to connector 141. The bottom end of pull wire C12 is connected to the measuring component 14 through the four connecting wires 142. The horizontal distance from the connection point of the four connecting wires 142 and connector 141 to the center of the measuring component 14 is equal. The four connecting wires 142 and pull wire C12 are connected at the same connection point.

[0040] The bottom support 2 is L-shaped, with a vertical groove 201 on one side and a channel 19 at the bottom. The pull wire passes through the channel 19 and through the bottom of the bottom support 2. The measuring element 14 is circular.

[0041] An elastic element 3 is provided on the bottom support 2. One end of the elastic element 3 is welded to the bottom support 2, and the other end of the elastic element 3 is welded to the horizontal cross brace 17 of the support assembly.

[0042] The wire-pulling device includes a wire-clamping box 6, a wire-clamping groove 7, and a wire-pulling handle 8. The wire-clamping box 6 is connected to the support assembly. The wire-clamping groove 7 is disposed inside the wire-clamping box 6. The pull wire passes through the wire-clamping box 6 and the wire-clamping groove 7 and is connected to the wire-pulling handle 8. One end of the pull wires A10, B11, and C12 passes through the wire-clamping box 6 and the wire-clamping groove 7 and is connected to the wire-pulling handle 8. The wire-clamping groove 7 has an automatic wire-clamping function. After locking, the pull wires A10, B11, and C12 are locked, preventing the measuring piece 14 from descending. The ends of the pull wires A10, B11, and C12 are all connected to the wire-pulling handle 8.

[0043] The detector is connected to the support assembly via a fixed baffle 9. The detector includes a goniometer A4 and a goniometer B5. A connector 141 is provided on the measuring component 14. The connector 141 is arranged in a cross shape on the measuring component 14, and the center point of the connector 141 coincides with the center of the measuring component 14.

[0044] A method for using a drilling verticality detection structure for cast-in-place piles includes the following steps:

[0045] S1: Measure the diameter and depth of the foundation pit for the cast-in-place pile, and make a measuring piece 14 that fits the inner wall of the foundation pit according to the size of the foundation pit;

[0046] S2: Fabricate diagonal bracing A15, diagonal bracing B16, horizontal bracing 17 and diagonal bracing C18, and complete the connection of the support components. Set the bottom of diagonal bracing C18 on soil layer 1.

[0047] S3: Set the bottom support 2 on the soil layer 1, set the horizontal cross brace 17 in the vertical groove 201, and then install the elastic element 3;

[0048] S4: Install pulley 13 on diagonal brace A15, diagonal brace B16 and horizontal brace 17 respectively;

[0049] S5: Install the wire pulling device, then install the pull wires A10, B11 and C12, connect the goniometer A4 to the diagonal brace A15 through the fixed baffle 9, and connect the goniometer B5 to the diagonal brace B16 through the fixed baffle 9.

[0050] S6: Determine whether the installation position, accuracy, and elevation of each part meet the design requirements. If they do not meet the requirements, the above installation steps must be repeated until the calibration and installation are qualified and the installation of the test structure is completed.

[0051] S7: After installation, record the initial readings of the goniometers A4 and B5. Unlock the wire-pulling device to allow the measuring piece 14 to descend into the bored pile hole. When the measuring piece 14 is at the bottom, middle, and top of the bored pile hole, record the readings of the goniometers A4 and B5 respectively. Take the average of the three measurements at each position and compare the error value of the average value with the initial data. Check whether the error is less than or equal to the standard or design value. If it is less than the standard or design value, the bored pile hole is deemed qualified. If not, use hole repair or other remedial measures until the verticality of the bored pile hole is qualified.

[0052] In step S4, the outer tangent of the pulley 13 on the diagonal brace A15 is flush with the end of one end of the horizontal cross brace 17, and the outer tangent of the pulley 13 on the diagonal brace B16 is flush with the end of the other end of the horizontal cross brace 17. A pulley 13 is provided on each side of the center point of the horizontal cross brace 17.

[0053] In step S5, the lengths of pull wires A10 and B11 are the same, and pull wire C12 is directly connected to the measuring component 14 without contacting the pulley 13. The connection points of pull wires A10, B11, and C12 with the pull wire handle 8 are all on the same side of the pull wire handle 8.

Claims

1. A structure for detecting the verticality of a cast-in-place pile hole, characterized in that: It includes a bottom support (2), a measuring component (14), a support assembly, a pull wire, a detector, and a wire-pulling device. The bottom support (2) is connected to the support assembly. The measuring component (14) is connected to the support assembly via a pull wire. One end of the pull wire is connected to the wire-pulling device. The detector and the wire-pulling device are mounted on the support assembly. The support assembly includes diagonal brace A (15), diagonal brace B (16), horizontal brace (17) and diagonal brace C (18). Pulleys (13) are respectively provided on diagonal brace A (15), diagonal brace B (16) and horizontal brace (17). A channel (19) is provided on the side of the horizontal brace (17) near the bottom support member (2). The pull wire passes through the channel (19) and slides through the horizontal brace (17). The pull wires include pull wire A (10), pull wire B (11) and pull wire C (12). Pull wire A (10) passes through the channel (19) through one side of the horizontal cross brace (17) and is slidably connected to the pulley (13) on the diagonal brace A (15) and the pulley (13) on the horizontal cross brace (17). Pull wire B (11) passes through the channel (19) through the other side of the horizontal cross brace (17) and is slidably connected to the pulley (13) on the diagonal brace B (16) and the pulley (13) on the horizontal cross brace (17). The bottom support (2) is L-shaped, with a vertical groove (201) on one side and a channel (19) at the bottom. The pull wire passes through the channel (19) through the bottom of the bottom support (2), and the measuring element (14) is circular.

2. The structure for detecting the verticality of a cast-in-place pile hole as described in claim 1, characterized in that: The horizontal brace (17) is connected to the diagonal brace A (15) on one side and to the diagonal brace B (16) on the other side. The two ends of the horizontal brace (17) are connected to the bottom support (2) respectively. Two diagonal braces C (18) are provided. The top ends of the diagonal brace A (15), diagonal brace B (16) and the two diagonal braces C (18) are connected to each other. The pull line is connected to the horizontal brace (17).

3. The structure for detecting the verticality of a cast-in-place pile hole as described in claim 2, characterized in that: An elastic element (3) is provided on the bottom support (2). One end of the elastic element (3) is connected to the bottom support (2), and the other end of the elastic element (3) is connected to the support assembly.

4. The structure for detecting the verticality of a cast-in-place pile hole as described in claim 1, characterized in that: The wire pulling device includes a wire clamping box (6), a wire clamping groove (7), and a wire pulling handle (8). The wire clamping box (6) is connected to the support assembly. The wire clamping groove (7) is located inside the wire clamping box (6). The wire passes through the wire clamping box (6) and the wire clamping groove (7) and is then connected to the wire pulling handle (8).

5. The structure for detecting the verticality of a cast-in-place pile hole as described in claim 1, characterized in that: The detector is connected to the support assembly via a fixed baffle (9). The detector includes a goniometer A (4) and a goniometer B (5). A connector (141) is provided on the measuring component (14). The connector (141) is arranged in a cross shape on the measuring component (14).

6. A method for using the verticality detection structure for cast-in-place pile holes as described in claim 5, characterized in that, Includes the following steps: S1: Measure the diameter and depth of the foundation pit for the cast-in-place pile; make a measuring piece (14) that fits the inner wall of the foundation pit according to the size of the foundation pit. S2: Make diagonal bracing A (15), diagonal bracing B (16), horizontal bracing (17) and diagonal bracing C (18), and complete the connection of the support components. Set the bottom of diagonal bracing C (18) on the soil layer (1). S3: Set the bottom support (2) on the soil layer (1), set the horizontal cross brace (17) in the vertical groove (201), and then install the elastic element (3). S4: Install the pulley (13) on the diagonal brace A (15), diagonal brace B (16) and horizontal brace (17) respectively; S5: Install the wire pulling device, then install the pull wire A (10), pull wire B (11) and pull wire C (12), connect the angle measuring instrument A (4) to the diagonal brace A (15) through the fixed baffle (9), and connect the angle measuring instrument B (5) to the diagonal brace B (16) through the fixed baffle (9); S6: Determine whether the installation position, accuracy, and elevation of each part meet the design requirements; if not, repeat the above installation steps until the calibration and installation are qualified and the installation of the test structure is completed. S7: After installation, record the initial readings of angle measuring instrument A (4) and angle measuring instrument B (5), unlock the wire pulling device to allow the measuring piece (14) to descend into the hole of the cast-in-place pile. When the measuring piece (14) is located at the bottom, middle and top of the hole of the cast-in-place pile, record the readings of angle measuring instrument A (4) and angle measuring instrument B (5) respectively. The average value of the readings at each position is taken as the average value of the three measurements. Compare the average value with the error value of the initial data. Check whether the error is less than or equal to the standard or design value. If it is less than the standard or design value, the hole of the cast-in-place pile is deemed qualified. If it is not qualified, use hole repair or other remedial measures until the verticality of the hole of the cast-in-place pile is qualified.

7. The method of using the verticality detection structure for cast-in-place piles as described in claim 6, characterized in that: In step S4, the outer tangent of the pulley (13) on the diagonal brace A (15) is flush with the end of one end of the horizontal cross brace (17), and the outer tangent of the pulley (13) on the diagonal brace B (16) is flush with the end of the other end of the horizontal cross brace (17). A pulley (13) is provided on each side of the center point of the horizontal cross brace (17). In step S5, the lengths of pull wire A (10) and pull wire B (11) are the same, and pull wire C (12) is directly connected to the measuring piece (14) without contacting the pulley (13). The connection points of pull wire A (10), pull wire B (11) and pull wire C (12) with the pull wire handle (8) are all on the same side of the pull wire handle (8).

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