A drilling positioning device for rotary bored piles

Abstract

The utility model relates to the technical field of pile foundation construction, and in particular to a drilling positioning device for rotary bored piles, comprising an annular groove rail supported by several base frames, the device also comprising a support ring rotatably arranged in the annular groove rail, two radially extending support bars symmetrically arranged at the center of the top surface of the support ring; the opposite ends of the two support bars are bent upward and slidably provided with positioning rods and sliding rods from top to bottom, the sliding rods on the two support bars are respectively connected to the outer wall of the positioning semi-ring constituting the cylindrical structure, the positioning rod is provided with a handle at one end facing the positioning semi-ring, a connecting piece at the other end, and a first spring is sleeved on the positioning rod between the connecting piece and the bent end of the support bar. The utility model has a simple structure, can quickly locate the drilling point, and provide auxiliary positioning and deviation correction operations for the subsequent casing burial, so as to ensure the drilling accuracy and the quality of the pile foundation in the later stage.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a drilling positioning device for rotary bored cast-in-place piles. Background Art

[0002] Rotary bored cast-in-place piles are formed by pouring concrete after drilling holes on site using spiral drills, submersible drills, etc. The overall process has the advantages of low vibration and low soil extrusion stress. In the specific construction work, it is necessary to bury a steel casing at the currently designed pile position so that the casing can position the subsequent rotary drilling holes. However, both the burial of the casing and the subsequent drilling need to be positioned according to the designed pile position, otherwise the casing burial deviation will cause the drilling position deviation, which will lead to the pile foundation deviation and even fail to meet the design requirements. The existing pile position positioning method generally determines the drilling point and the casing installation point through a cross pile guard and a hanging line, and the overall operation is complicated and cumbersome. Therefore, it is necessary to provide a new drilling positioning device for rotary bored cast-in-place piles to solve the above technical problems. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a drilling positioning device for rotary bored cast-in-place piles. The utility model has a simple structure, can quickly locate the drill point and provide auxiliary positioning and correction operations for subsequent casing burial, thereby ensuring the drilling accuracy and the quality of the subsequent pile foundation.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A drilling positioning device for rotary bored piles, comprising an annular groove rail supported by a plurality of base frames, the device further comprising a support ring rotatably arranged in the annular groove rail, and two radially extending support bars symmetrically arranged at the center of the top surface of the support ring;

[0006] The opposite ends of the two support bars are bent upward and slide from top to bottom to be equipped with positioning rods and sliding rods. The sliding rods on the two support bars are respectively connected to the outer walls of the positioning semi-rings that constitute the cylindrical structure. A handle is provided on one end of the positioning rod facing the positioning semi-ring, and a connecting piece is provided on the other end. A first spring is sleeved on the positioning rod between the connecting piece and the bent end of the support bar.

[0007] Preferably, the device further comprises an annular bracket, the annular groove rail is in clearance fit with the annular bracket, and the outer wall at the bottom end of the annular groove rail is provided with a flange for supporting the annular bracket;

[0008] A plurality of mounting frames are arranged at equal intervals on the annular bracket in the circumferential direction, a sliding rod is slidably provided on the mounting frame, and a scale bar is arranged on the sliding rod.

[0009] Preferably, a handle and an indicator rod are provided on the top of the mounting frame, and an arrow pointing to the scale bar is provided on the indicator rod.

[0010] Preferably, a ball barrel is provided at one end of the sliding rod facing the positioning semi-ring, and the universal ball is rollingly arranged in the ball barrel with a part of the ball exposed to the outside.

[0011] Preferably, a support sheet is vertically provided at the bottom of one end of the sliding rod away from the positioning semi-ring, and the support sheet is connected to the outer wall of the mounting frame via a second spring.

[0012] Preferably, a plug hole is provided in the horizontal portion of the base frame, and the plug hole is plugged into the positioning plug rod.

[0013] The working mode of the utility model is as follows:

[0014] First, move the utility model to the designed pile position, then place the base frame on the ground and insert the insertion rod into the ground through the insertion hole to complete the positioning of the base frame and the annular groove rail. Then put the support ring into the annular groove rail, and at the same time, the positioning rod keeps moving in opposite directions under the elastic force of the first spring so that the two positioning semi-rings form a cylinder, and then insert the centering rod from the cylinder into the bottom surface. The position of this centering rod serves as the casing and drilling point. Then, overcome the elastic force of the first spring, pull the two positioning rods back to back through the handle to separate the positioning semi-rings from the centering rod, and at the same time exert force to move them out of the annular groove rail together with the support ring, leaving only the annular groove rail and the centering rod on the ground.

[0015] Move the annular bracket by the handle and assemble the annular bracket and the outer wall of the annular groove rail, then overcome the elastic force of the second spring and pull the handle outward, so that the sliding rod moves backward and vacates the internal space of the annular groove rail, and the crane lowers the casing to the ground between the annular groove rails and adjusts the position of the casing to ensure the concentricity of the casing and the centering rod. Then release the hand to reset the sliding rod and make the universal ball contact the casing. The arrow on the indicator rod corresponds to the scale line of the scale bar, and the position of each sliding rod relative to the mounting frame is recorded at this moment, and then the casing is pressed down to bury. During the process of pressing down the casing, the outer wall of the casing and the universal ball are rolling friction, so the axial movement of the casing will not cause the movement of the sliding rod. However, if the sliding rod is observed to be squeezed outward, it means that the casing is radially deflected. If necessary, the machine can be stopped and corrected according to the scale change of the sliding rod until the casing is successfully buried. The subsequent drill rod can rely on the casing to locate the hole.

[0016] Compared with the prior art, the utility model has the following advantages: the utility model has a simple structure, can quickly locate the drilling point and provide auxiliary positioning and correction operations for subsequent casing burial, thereby ensuring the drilling accuracy and the quality of the later pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the drilling positioning device of the rotary bored pile according to the specific implementation method;

[0018] Figure 2 It is a structural schematic diagram of the annular groove rail described in a specific implementation method;

[0019] Figure 3 It is a structural schematic diagram of the support ring described in the specific implementation method;

[0020] Figure 4 It is a schematic structural diagram of the annular bracket described in a specific implementation method. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] like Figure 1-4 As shown, a drilling positioning device for rotary bored piles comprises an annular groove rail 11 supported by a plurality of base frames 1, wherein a plug hole 12 is provided in a horizontal portion of the base frame 1, and the plug hole 12 is plugged with a positioning plug rod 13.

[0023] The device also includes a support ring 211 rotatably arranged in the annular groove 11, and two radially extending support bars 21 are symmetrically arranged at the center of the top surface of the support ring 211. The opposite ends of the two support bars 21 are bent upward and are slidably provided with positioning rods 24 and sliding rods 22 from top to bottom. The sliding rods 22 on the two support bars 21 are respectively connected to the outer walls of the positioning semi-rings 23 that form the cylindrical structure. The positioning rod 24 is provided with a handle 223 at one end facing the positioning semi-ring 23 and a connecting piece 221 at the other end, and a first spring 222 is sleeved on the positioning rod 24 between the connecting piece 221 and the bent end of the support bar 21.

[0024] The device further comprises an annular support 3, the annular groove 11 is clearance-matched with the annular support 3, and the outer wall at the bottom end of the annular groove 11 is provided with a flange 35 for supporting the annular support 3;

[0025] Several mounting brackets 31 are provided at equal intervals in the circumferential direction on the annular bracket 3. A handle 312 and an indicator rod 314 are provided on the top of the mounting bracket 31. An arrow pointing to a scale bar 321 is provided on the indicator rod 314. A sliding rod 32 is provided to slide through the mounting bracket 31, and a scale bar 321 is provided on the sliding rod 32. A ball barrel 33 is provided at one end of the sliding rod 32 facing the positioning semi-ring 23. A universal ball 331 is rolled in the ball barrel 33 and part of the ball is exposed to the outside. A support sheet 34 is vertically provided at the bottom of one end of the sliding rod 32 away from the positioning semi-ring 23, and the support sheet 34 is connected to the outer wall of the mounting bracket 31 through a second spring 341.

[0026] The working mode of the utility model is as follows:

[0027] First, move the utility model to the designed pile position, then place the base frame 1 on the ground and insert the insertion rod 13 into the ground through the insertion hole 12 to complete the positioning of the base frame 1 and the annular groove rail 11. Then put the support ring 211 into the annular groove rail 11, and at the same time, the positioning rod 24 keeps moving in opposite directions under the elastic force of the first spring 222 and makes the two positioning semi-rings 23 form a cylinder, and then insert the centering rod 4 from the cylinder into the bottom surface, and the position of this centering rod 4 is used as the casing and drilling point. Then, overcome the elastic force of the first spring 222, pull the two positioning rods 24 back to back through the handle 223 and separate the positioning semi-ring 23 from the centering rod 4, and at the same time exert force to move it out of the annular groove rail 11 together with the support ring 211, leaving only the annular groove rail 11 and the centering rod 4 on the ground.

[0028] Move the annular bracket 3 through the handle 312 and assemble the annular bracket 3 and the outer wall of the annular groove 11, then overcome the elastic force of the second spring 341 and pull the handle 312 outward, so that the sliding rod 32 moves backward and vacates the internal space of the annular groove 11, and the crane lowers the casing to the ground between the annular groove 11 and adjusts the position of the casing to ensure the concentricity of the casing and the centering rod. Then release the hand to reset the sliding rod 32 and make the universal ball 331 contact the casing, and record the position of each sliding rod 32 relative to the mounting frame 31 at this moment through the scale line of the scale bar 321 corresponding to the arrow on the indicator rod 314, and then press down to bury the casing. During the pressing process of the casing, the outer wall of the casing and the universal ball 331 are in rolling friction, so the axial movement of the casing will not cause the movement of the sliding rod 32. However, if the sliding rod 32 is observed to be squeezed outward, it means that the casing is radially deflected. If necessary, the machine can be stopped and the deviation can be corrected according to the scale change of the sliding rod 32 until the casing is successfully buried. The subsequent drill rod can rely on the casing to position the hole.

Claims

1. A drilling positioning device for rotary bored piles, comprising an annular groove rail (11) supported by a plurality of base frames (1), characterized in that: The device further comprises a support ring (211) rotatably arranged in the annular groove track (11), and two radially extending support bars (21) are symmetrically arranged at the center of the top surface of the support ring (211); The opposite ends of the two support bars (21) are bent upward and slidably provided with a positioning rod (24) and a sliding rod (22) from top to bottom. The sliding rods (22) on the two support bars (21) are respectively connected to the outer wall of the positioning semi-ring (23) constituting the cylindrical structure. The positioning rod (24) is provided with a handle (223) at one end facing the positioning semi-ring (23) and a connecting piece (221) at the other end. A first spring (222) is sleeved on the positioning rod (24) between the connecting piece (221) and the bent end of the support bar (21).

2. The drilling positioning device for rotary bored piles according to claim 1, characterized in that: The device further comprises an annular support (3), the annular groove rail (11) and the annular support (3) are clearance-matched, and a flange (35) for supporting the annular support (3) is provided on the outer wall of the bottom end of the annular groove rail (11); A plurality of mounting frames (31) are equidistantly arranged on the annular bracket (3) in the circumferential direction, and a sliding rod (32) is slidably provided through the mounting frame (31), and a scale bar (321) is provided on the sliding rod (32).

3. The drilling positioning device for rotary bored piles according to claim 2, characterized in that: The mounting frame (31) is provided with a handle (312) and an indicator rod (314), and the indicator rod (314) is provided with an arrow pointing to the scale bar (321).

4. The drilling positioning device for rotary bored piles according to claim 2, characterized in that: A ball barrel (33) is provided at one end of the sliding rod (32) facing the positioning semi-ring (23), and a universal ball (331) is rollingly arranged in the ball barrel (33) with a portion of the ball body exposed to the outside.

5. The drilling positioning device for rotary bored piles according to claim 4, characterized in that: A support sheet (34) is vertically provided at the bottom of one end of the sliding rod (32) away from the positioning half ring (23), and the support sheet (34) is connected to the outer wall of the mounting frame (31) via a second spring (341).

6. The drilling positioning device for rotary bored piles according to claim 1, characterized in that: A plug hole (12) is provided on the horizontal portion of the base frame (1), and the plug hole (12) is plugged into a positioning plug rod (13).

Images