CN219105171U

CN219105171U - Pile hole center positioning device

Info

Publication number: CN219105171U
Application number: CN202223220669.0U
Authority: CN
Inventors: 张庆鹏; 井月强; 王金尧; 冯晓鹏; 贾永兵; 李雪雷; 唐澄宇
Original assignee: PowerChina Hebei Engineering Corp Ltd
Current assignee: PowerChina Hebei Engineering Corp Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-30
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a pile hole center positioning device, which comprises a base and a positioning mechanism arranged on the base; the positioning mechanism comprises a shell arranged on the base, a positioning gear rotatably arranged in the shell and at least two racks meshed with the positioning gear; the rack is characterized in that at least two racks are distributed on the outer ring of the positioning gear at equal intervals along the axial direction, the free ends of the racks extend to the outside of the shell, the free ends of the racks are provided with supporting legs in a sliding mode along the vertical direction, the supporting legs can slide to the lower portion of the base from the upper portion of the base, and the distance between each supporting leg at the end of each rack and the meshing position of the rack is consistent with the distance between the corresponding rack and the corresponding positioning gear. The utility model is convenient for safely and accurately positioning the center point of the pile hole. The utility model is suitable for the field of pile foundation construction and is used for positioning the center point of a pile hole.

Description

Pile hole center positioning device

Technical Field

The utility model belongs to the technical field of building construction, relates to pile foundation construction, and in particular relates to a pile hole center positioning device.

Background

In the construction process of a building, the construction of a pile foundation is needed at the bottom, the construction mode of the pile foundation is a bored pile, the process flow of the bored pile comprises site leveling, measuring and lofting, embedding a pile casing, drilling by a drilling machine, placing a reinforcement cage, pouring concrete and detecting the integrity of a pile body, wherein the concrete process of measuring and lofting is to position the center point of the pile hole by using an RTK measuring instrument according to the coordinates of a design drawing, lofting is carried out at the center point after the center point is determined, the pile casing is needed to be embedded into the position of the pile hole after lofting, the edge of the pile casing is the edge of the pile hole, when the pile casing is embedded, the center point of the pile casing coincides with the center point of the pile hole, and the center point of the pile hole is needed to be retested by using the RTK measuring instrument after the drilling of the pile hole, so that the center point of the pile hole is ensured not to deviate.

In the conventional method, the coordinates of the center point after drilling are retested, generally, the center point of the pile hole is determined by placing the edge of the pile hole or the grating plate above the pile hole and measuring the diameter of the pile hole by using a steel ruler, the coordinates of the center point of the pile hole are measured by using an RTK measuring instrument, and whether the deviation occurs is judged by comparing the measured coordinates of the center point of the pile hole with the coordinates required by a design drawing.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide a pile hole center positioning device so as to achieve the purpose of accurately and safely positioning the center point of a pile hole.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a pile hole center positioning device comprises a base and a positioning mechanism arranged on the base; the positioning mechanism comprises a shell arranged on the base, a positioning gear rotatably arranged in the shell and at least two racks meshed with the positioning gear; the rack is characterized in that at least two racks are distributed on the outer ring of the positioning gear at equal intervals along the axial direction, the free ends of the racks extend to the outside of the shell, the free ends of the racks are provided with supporting legs in a sliding mode along the vertical direction, the supporting legs can slide to the lower portion of the base from the upper portion of the base, and the distance between each supporting leg at the end of each rack and the meshing position of the rack is consistent with the distance between the corresponding rack and the corresponding positioning gear.

As a limitation of the present utility model, the rack meshed with the positioning gear is divided into an upper layer and a lower layer, each layer comprises two oppositely arranged racks, and the two opposite racks are parallel to each other.

As a further limitation of the utility model, a hand wheel is fixedly arranged above the positioning gear.

As a still further definition of the present utility model, the base is a grating plate.

As another limitation of the present utility model, the present utility model further comprises a fixing bracket including a fixing tube, a positioning box disposed below the fixing tube, and a supporting mechanism disposed between the fixing tube and the positioning box; the inner diameter of the fixed pipe is matched with the outer diameter of the supporting leg of the RTK measuring instrument; the top of the positioning box is provided with a positioning hole, the center of the positioning hole and the center of the positioning gear are positioned on the same vertical line, and the positioning box is used for being tightly buckled with the shell; the two ends of the supporting mechanism are respectively and fixedly arranged on the fixed pipe and the positioning box so as to support the fixed pipe above the positioning box.

As a further limitation of the present utility model, the support mechanism includes a plurality of extension bars provided on the positioning box and diagonal bars provided at ends of each of the extension bars; the extension rods are respectively and fixedly arranged at the centers of four vertical side surfaces of the positioning box, and the other end of each inclined rod is fixedly connected with the fixing pipe.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

the end part of the rack is propped against the inner wall of the pile casing by the positioning mechanism, the center point of the positioning gear meshed with the rack coincides with the center point of the pile casing, and the center point of the pile casing is the center point of the pile hole, so that the center point of the pile hole can be conveniently and quickly determined, the gear is meshed with the rack, the position of the free end of the rack can be adjusted by rotating the gear, and the pile hole with various sizes can be adapted; and a fixed bracket can be arranged above the positioning mechanism to erect the RTK measuring instrument above the pile hole to measure the position data of the pile hole.

In conclusion, the method is simple to operate, convenient to use, good in universality, suitable for the field of pile foundation construction and used for quickly and accurately positioning the center point of the pile hole.

Drawings

The utility model will be described in more detail below with reference to the accompanying drawings and specific examples.

FIG. 1 is a schematic view of a usage state of an embodiment of the present utility model;

FIG. 2 is a front view of a structure of an embodiment of the present utility model;

FIG. 3 is a top view of a positioning mechanism according to an embodiment of the present utility model;

in the figure: 1. a base; 2. a positioning mechanism; 3. a fixed bracket; 4. an RTK measuring instrument; 201. a housing; 202. positioning gears; 203. a rack; 204. a support leg; 205. a hand wheel; 301. a fixed tube; 302. a positioning box; 303. an extension rod; 304. a diagonal rod; 401. and (5) supporting legs.

Detailed Description

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are presented for purposes of illustration and understanding only, and are not intended to limit the utility model.

Embodiment is a pile hole center positioning device

As shown in fig. 1 to 3, the present embodiment includes a base 1, a positioning mechanism 2 provided on the base 1, and a fixing bracket 3 fitted on the positioning mechanism 2.

The base 1 is a steel grating plate, the base 1 can completely cover the pile hole, and when the pile hole is used, the base 1 can bear the positioning mechanism 2 and the fixed support 3 and serve as a platform for a measurer to tread, so that the measurer is prevented from falling into the pile hole.

The positioning mechanism 2 is arranged on the base 1, the positioning mechanism 2 comprises a shell 201 arranged on the base 1, a positioning gear 202 arranged in the center of the shell 201 in a rotating mode and four racks 203 meshed with the positioning gear 202, the four racks 203 are divided into an upper layer and a lower layer, wherein the oppositely arranged racks 203 are parallel to each other and are positioned on the same layer, the adjacently arranged racks 203 are perpendicular to each other and are not positioned on the same layer, free ends of the racks 203 are provided with supporting feet 204 in a sliding mode through a pipe clamp, jackscrews are arranged on the pipe clamp, the positions of the supporting feet 204 can be fixed through rotating jackscrews, the distance between the supporting feet 204 of the end portions of each rack 203 and the center point of the positioning gear 202 is identical, and the supporting feet 204 can slide along the vertical direction to penetrate through gaps of the base 1 to prop against the edges of a pile casing to fix the positions of the positioning gear 202 at the center of pile holes.

In the process of rotating the positioning gear 202 to move the rack 203, the support legs 204 at the end of the rack 203 are all located above the base 1, when the end of the rack 203 approaches the edge of the pile casing, the support legs are loosened by rotating the jackscrews, the support legs 204 are slidably located below the base 1, the support legs are fixed by rotating the jackscrews, the positioning gear 202 is continuously rotated to enable the support legs 204 to abut against the edge of the pile casing, and when the support legs 204 abut against the edge of the pile casing, the distance between the support legs 204 at the end of each rack 203 and the center point of the positioning gear 202 is consistent, so that the center of the positioning gear 202 can be regarded as the center of the pile hole.

It should be noted that, the racks 203 meshed with the positioning gear 202 may also be three racks 203 or two racks 203 parallel to each other, as long as the racks 203 are uniformly distributed along the outer ring of the positioning gear 202 and can smoothly move along with the rotation of the positioning gear 202.

Wherein, the upper side of the positioning gear 202 is fixedly provided with a hand wheel 205 through a connecting shaft, and two ends of the connecting shaft are respectively arranged at the centers of the gear 202 and the hand wheel 205, so that the spatial projection of the center point of the hand wheel 205 and the center point of the positioning gear 202 on the horizontal plane coincides, the positioning gear 202 can be driven to rotate by rotating the hand wheel 205, and the rack 203 meshed with the positioning gear 202 can be extended outwards or retracted inwards along with the rotation of the positioning gear 202.

It should be noted that, the coordinate data measured by the RTK measuring apparatus 4 is the coordinate data of the point where the bottom of the leg 401 is located, the leg 401 is a vertical rod, and the RTK measuring apparatus 4 can be vertically placed above the hand wheel to measure the coordinate data of the center point of the pile hole.

The fixing bracket 3 includes a fixing tube 301, a positioning box 302, and a connection mechanism provided between the fixing tube 301 and the positioning box 302;

the pipe diameter of the fixed pipe 301 is matched with the diameter of the supporting leg 401 of the RTK measuring instrument 4, and when the coordinates of the center point of the pile hole need to be measured, the supporting leg 401 of the RTK measuring instrument 4 can penetrate through the fixed pipe 301, so that the bottom of the supporting leg 401 is positioned in the positioning hole.

The positioning box 302 is a bottomless five-sided box body, the bottom can be tightly buckled on the shell 201 of the positioning mechanism 2, a channel is formed in the vertical side face of the positioning box 302, the position of the channel corresponds to the position of the rack 203 when the positioning box 302 is buckled with the shell 201, the rack 203 is just positioned in the channel, a positioning hole is formed in the center of the top of the positioning box 302, and the positioning hole is used for clamping the bottom of the supporting leg 401.

The connecting mechanism comprises extension rods 303 fixedly arranged at the centers of four vertical side surfaces of the positioning box 302 and inclined rods 304 respectively arranged at the other ends of the extension rods 303, the upper ends of the inclined rods 304 are fixedly connected with the fixed pipe 301, the four extension rods 303 are consistent in size, the four inclined rods 304 are consistent in size, and the included angles of each inclined rod 304 and the corresponding extension rod 303 are consistent, so that the centers of the fixed pipe 301 and the positioning box 302 are positioned on the same vertical line.

It should be noted that, when the positioning box 302 is fastened to the housing 201, the extension rod 303 on the side of the positioning box 302 is parallel to the rack 203, the center of the fixing tube 301 and the center of the positioning box 302 are on the same vertical line, the positioning hole is formed at the center of the positioning box 302, when the positioning box 302 is tightly fastened to the housing 201, the center of the positioning box is on the same vertical line as the center of the housing 201, the center of the housing 201 and the center of the positioning gear 202 are on the same vertical line, when the support legs 204 are all abutted against the edge of the casing, because the distance from each support leg 204 to the meshing position of the rack 203 and the positioning gear 202 is consistent, the center of the positioning gear 202 can be regarded as the center of the pile hole, and the data measured when the bottom of the support leg 401 of the RTK measuring instrument 4 is located in the positioning hole is the data of the center point of the pile hole.

When the positioning device is used, the base 1 is placed on the pile casing, the positioning mechanism 2 is adjusted to be positioned right above the pile hole, the hand wheel 205 is rotated to enable the rack 203 to synchronously move outwards, the support legs 204 are slidingly placed below the base 1 to prop against the edge of the pile casing when the end part of the rack 203 moves to the edge of the pile casing, the position of the positioning mechanism 2 is slightly adjusted according to the distance between the support legs and the edge of the pile casing at the moment, the hand wheel 205 is continuously rotated until all the support legs 204 prop against the edge of the pile casing, the positioning box 302 at the bottom of the fixed support 3 is buckled on the shell 201, the fixed support 3 is rotated to enable the rack 203 to be positioned in a groove at the side of the positioning box 302, the support legs 401 of the RTK measuring instrument 4 are inserted into the fixed pipe 301, the bottoms of the support legs 401 are positioned in the positioning hole, and data measured at the moment are data at the center point of the pile hole.

It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but the present utility model is described in detail with reference to the foregoing embodiment, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a stake hole center positioning device which characterized in that: comprises a base and a positioning mechanism arranged on the base; the positioning mechanism comprises a shell arranged on the base, a positioning gear rotatably arranged in the shell and at least two racks meshed with the positioning gear; the rack is characterized in that at least two racks are distributed on the outer ring of the positioning gear at equal intervals along the axial direction, the free ends of the racks extend to the outside of the shell, the free ends of the racks are provided with supporting legs in a sliding mode along the vertical direction, the supporting legs can slide to the lower portion of the base from the upper portion of the base, and the distance between each supporting leg at the end of each rack and the meshing position of the rack is consistent with the distance between the corresponding rack and the corresponding positioning gear.

2. The pile hole center positioning device according to claim 1, wherein: the racks meshed with the positioning gears are divided into an upper layer and a lower layer, each layer comprises two oppositely arranged racks, and the two opposite racks are parallel to each other.

3. The pile hole center positioning device according to claim 2, wherein: and a hand wheel is fixedly arranged above the positioning gear.

4. A piling hole center positioning apparatus according to claim 3, wherein: the base is a grating plate.

5. The pile hole center positioning device according to any one of claims 1-4, wherein: the fixing support comprises a fixing tube, a positioning box arranged below the fixing tube and a supporting mechanism arranged between the fixing tube and the positioning box; the inner diameter of the fixed pipe is matched with the outer diameter of the supporting leg of the RTK measuring instrument; the top of the positioning box is provided with a positioning hole, the center of the positioning hole and the center of the positioning gear are positioned on the same vertical line, and the positioning box is used for being tightly buckled with the shell; the two ends of the supporting mechanism are respectively and fixedly arranged on the fixed pipe and the positioning box so as to support the fixed pipe above the positioning box.

6. The pile hole center positioning device according to claim 5, wherein: the supporting mechanism comprises a plurality of extension rods arranged on the positioning box and inclined rods arranged at the end parts of each extension rod;

the extension rods are respectively and fixedly arranged at the centers of four vertical side surfaces of the positioning box, and the other end of each inclined rod is fixedly connected with the fixing pipe.