Pile foundation positioning rechecking tool

Abstract

The utility model relates to the technical field of pile foundation construction, in particular to a pile foundation positioning and rechecking tool which comprises two chord plates, a connecting rod is fixedly connected to the half-length position of each chord plate, and the connecting rods are perpendicular to the chord plates and located on one sides of the chord plates. The device further comprises a center cylinder, the other end of the connecting rod is connected to the center cylinder in a sleeving mode and can rotate along the center cylinder, the upper end of the center cylinder is detachably connected with a prism installation base, and a prism is installed on the prism installation base. The pile foundation positioning and rechecking tool is designed through the thought that the intersection point of the perpendicular bisectors of any two chords on a circle is the circle center, is convenient to disassemble and assemble, can be repeatedly used, can be used in cooperation with a total station, can accurately position the center of a pile position and rapidly remeasure the coordinates of the center of the pile position, and is convenient and fast to use; manual repeated lofting for guiding the cross-shaped pile is avoided, the construction efficiency is improved, and manual errors can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a pile foundation positioning and verification tool. Background Art

[0002] Pile foundation construction is one of the important processes of municipal bridges. It has the characteristics of large quantity and high precision. Therefore, during pile foundation construction, the position deviation control of the hole is one of the main technical difficulties in the pile foundation construction process. In general, the pile foundation position is measured by the bolting method. First, the measurement and layout are carried out, the pile position is determined by the total station, and the center of the pile position is driven at the pile position. The center of the pile position is marked on the center of the pile, and then the cross pile is driven outside the pile foundation by the center point of the pile foundation. The position of the pile foundation is determined at any time by the cross pile line. Disturbance is easy to occur during the pile foundation hole forming and steel casing sinking, which will destroy the position of the outer cross pile. Therefore, it may be necessary to lay out the cross piles for many times during the pile foundation hole forming process. At the same time, after the first section of the steel casing sinks, the center point of the pile position needs to be re-measured, and the cross pile needs to be laid out again, which adds a lot of layout work for the construction personnel. In addition, the bolting method has high technical requirements for the surveying personnel and there is a risk of manual error. At the same time, the existing method is affected by the environment and cannot be used when the wind is strong and affects the construction line. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pile foundation positioning and verification tool that is convenient for accurately locating the hole position and re-measuring after the first section of the steel casing sinks.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A pile foundation positioning and verification tool comprises two chord plates, a connecting rod is fixedly connected to one half of the length of the chord plates, the connecting rod is arranged perpendicular to the chord plates and is located on one side of the chord plates; and also comprises a central tube, the other end of the connecting rod is sleeved on the central tube and can rotate along the central tube, the upper end of the central tube is detachably connected to a prism mounting seat, and a prism is mounted on the prism mounting seat.

[0006] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:

[0007] The utility model designs a pile foundation positioning verification tool based on the idea that the intersection of the perpendicular bisectors of any two chords on a circle is the center of the circle. The tool is easy to disassemble and assemble and can be reused. When used with a total station, it can accurately locate the center of the pile position and quickly remeasure the coordinates of the center of the pile position. The tool is easy to use, avoids multiple manual layout and introduction of cross piles, improves construction efficiency, and can effectively avoid manual errors.

[0008] Preferably, the connecting rod is a telescopic structure, including a connecting sleeve, one end of which is detachably connected to the middle part of the chord plate by a connecting bolt, and the other end is slidably sleeved with an inner support rod, and an adjusting bolt and an adjusting nut are provided on the connecting sleeve corresponding to the inner support rod, and the end of the adjusting bolt abuts against the outer wall of the inner sleeve and is further fixed by the adjusting nut; the other end of the inner support rod is provided with a through hole and is sleeved on the center tube through the through hole.

[0009] Preferably, a scale is provided on the inner support rod to facilitate adjustment of the lengths of the connecting rods on both sides to be the same.

[0010] Preferably, an anti-drop bottom bracket is provided at the lower end of the central tube, and the size of the anti-drop bottom bracket is larger than the diameter of the through hole on the inner support rod to prevent the inner support rod from falling off.

[0011] Preferably, an extension tube is threadedly connected between the central tube and the prism mounting seat to facilitate re-measurement after the first section of the steel casing is sunk. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the top view of the pile foundation positioning verification tool in the embodiment of the utility model;

[0013] Figure 2 It is a side view structural schematic diagram of the pile foundation positioning verification tool in the embodiment of the utility model;

[0014] Figure 3 It is a schematic diagram of the connection structure of the extension pipe in the embodiment of the utility model.

[0015] Explanation of the reference numerals: 1. chord plate; 201. connecting sleeve; 202. inner support rod; 3. center tube; 301. anti-drop bottom bracket; 4. prism mounting seat; 5. prism; 6. adjusting bolt; 7. scale; 8. extension rod. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0017] like Figure 1 , Figure 2 As shown, the utility model discloses a pile foundation positioning verification tool, including two chord plates 1, a connecting rod is fixedly connected to the chord plate 1 at one-half of its length, the connecting rod is arranged perpendicular to the chord plate 1 and is located on one side of the chord plate 1; it also includes a central tube 3, the other end of the connecting rod is sleeved on the central tube 3 and can rotate along the central tube 3, the upper end of the central tube 3 is detachably connected to a prism 5 mounting seat 4, and a prism 5 is mounted on the prism 5 mounting seat 4; wherein, in order to be suitable for different pile diameters, the connecting rod is a telescopic structure.

[0018] Furthermore, the present embodiment discloses a specific structure of a connecting rod, which includes a connecting sleeve 201, one end of which is detachably connected to the middle position of the chord plate 1 by a connecting bolt and a connecting nut, and the other end is slidably sleeved with an inner support rod 202; an adjusting bolt 6 and an adjusting nut are provided on the connecting sleeve 201 corresponding to the inner support rod 202, and the end of the adjusting bolt 6 passes through the side wall of the connecting sleeve 201 and abuts against the outer wall of the inner sleeve, and is further fixed by the adjusting nut; a through hole is provided at one end of the inner support rod 202 away from the connecting sleeve 201 and is sleeved on the center tube 3 through the through hole.

[0019] Furthermore, a scale 7 is provided on the inner support rod 202; by observing the positions of the scale 7 on the corresponding inner support rod 202 where the ends of the two connecting sleeves 201 are located, it is convenient to judge whether the adjustment lengths of the two connecting rods are equal.

[0020] Preferably, Figure 3 As shown, an anti-drop bottom bracket 301 is provided at the lower end of the central tube 3, and the size of the anti-drop bottom bracket 301 is larger than the diameter of the through hole on the inner support rod 202, so as to prevent the inner support rod 202 from falling off.

[0021] Further, such as Figure 3 In order to facilitate the remeasurement after the first section of steel casing is sunk, an extension tube is threadedly connected between the center tube 3 and the prism 5 mounting seat 4; the specific structure is that the upper end of the center tube 3 is a first internal threaded joint, the lower end of the extension tube is a first external threaded joint, and the upper end is a second internal threaded joint; a second external threaded joint is arranged at the bottom of the prism 5 mounting seat 4; the extension tube can be connected to several sections according to the height of the first section pile, so that after the extension tube is connected, the tool is lowered into the first section pile, and the prism 5 can be higher than the upper edge of the first section pile, so as to facilitate the total station to remeasure whether the coordinates of the center point of the pile position are offset.

[0022] The utility model can be used in various stages of pile foundation hole drilling operations, can be used to confirm the position of the center point of the pile position, and can also be used for re-measurement of the center point of the pile position in the hole drilling stage; when used for confirming the center point of the pile position, the prism 5 mounting seat 4 is directly connected to the center tube 3, the prism 5 is installed on the prism 5 mounting seat 4, and then the lower end of the center tube 3 is inserted into the center position of the pile foundation hole, and the total station is used in conjunction with the prism 5 to confirm whether the coordinates of the center point of the pile position are the designed position; when the hole drilling operation starts and it is necessary to re-measure the center point of the pile position, adjust the length of the connecting rod so that the two chord plates 1 can both abut against the inner wall of the first section of the pile, observe whether the lengths of the two connecting rods are consistent, and after they are consistent, according to the depth of the re-measurement required, install an extension rod 8 of a suitable length between the center tube 3 and the prism 5 mounting seat 4, and then lower the tool along the inner wall of the pile body to a suitable position. At this time, the prism 5 is higher than the upper edge of the first section of the pile, and the total station is used to measure the coordinates.

[0023] Since the device is easy to disassemble, convenient to use, and can be reused, the pile position center point measurement accuracy is high, and the pile position center can be found by simply placing the tool into the pile hole.

[0024] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A pile foundation positioning verification tool, characterized by: It includes two chord plates, a connecting rod is fixedly connected to the half of the length of the chord plate, the connecting rod is arranged perpendicular to the chord plate and is located on one side of the chord plate; it also includes a central tube, the other end of the connecting rod is sleeved on the central tube and can rotate along the central tube, the upper end of the central tube is detachably connected to a prism mounting seat, and a prism is mounted on the prism mounting seat.

2. The pile foundation positioning verification tool according to claim 1, characterized in that: The connecting rod is a telescopic structure, including a connecting sleeve, one end of which is detachably connected to the middle of the chord plate by a connecting bolt, and the other end is slidably sleeved with an inner support rod. An adjusting bolt and an adjusting nut are provided on the connecting sleeve corresponding to the inner support rod. The end of the adjusting bolt abuts against the outer wall of the inner sleeve and is further fixed by the adjusting nut; a through hole is provided at the other end of the inner support rod and is sleeved on the center tube through the through hole.

3. The pile foundation positioning verification tool according to claim 2, characterized in that: The inner support rod is provided with a scale.

4. The pile foundation positioning verification tool according to claim 2, characterized in that: An anti-drop bottom bracket is arranged at the lower end of the central tube, and the size of the anti-drop bottom bracket is larger than the diameter of the through hole on the inner support rod.

5. The pile foundation positioning verification tool according to claim 1, characterized in that: An extension tube is threadedly connected between the central tube and the prism mounting seat.

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