A device for controlling the top elevation of bored cast-in-place piles

Abstract

This utility model discloses a device for controlling the top elevation of a bored pile, including a bored pile hole. A grouting pipe is inserted into the inner side of the bored pile hole. A support positioning plate body is sleeved on the outer surface of the grouting pipe. The support positioning plate body adopts a folded plate structure and is fixed to the outer surface of the reinforcing cage around the bored pile hole. A floating measuring scale rod is slidably inserted into the inner surface of the support positioning plate body. An annular support float body is fixedly connected to the lower surface of the floating measuring scale rod. The outer surface of the floating measuring scale rod is provided with scale lines. The annular support float body structure is set in a large area inside the bored pile hole. The floating measuring scale rod on its surface measures the grouting depth. Its floating support area is large, which is more accurate. Moreover, the detachable sliding lifting structure is more accurate and the structure is solid.

Description

Technical Field

[0001] This utility model relates to the field of pile top elevation control devices for bored cast-in-place piles, and more specifically, to a pile top elevation control device for bored cast-in-place piles. Background Technology

[0002] Drilled cast-in-place piles are piles constructed by creating a hole in the foundation soil on-site using methods such as mechanical drilling, steel pipe extrusion, or manual digging, then placing a reinforcing cage inside and pouring concrete. Depending on the hole-forming method, cast-in-place piles can be classified into several types, including driven cast-in-place piles, drilled cast-in-place piles, and excavated cast-in-place piles. Drilled cast-in-place piles are widely used in modern construction, especially for large buildings with high performance and bearing capacity requirements. When using mud-wall drilling for cast-in-place piles, the design pile top elevation is often lower than the borehole elevation during underwater pouring. The mud level makes it impossible to directly measure the accurate elevation of the concrete surface. Currently, the more traditional control method is to use a measuring hammer to measure and judge the concrete surface by the pouring workers. Due to the differences in parameters of each concrete batch and the specific gravity of the mud in the hole during underwater concrete pouring, there is no fixed standard for measurement, and it relies solely on the experience of the pouring workers. After the pile is excavated, the elevation of the pile top fluctuates. When the concrete surface is lower than the pile top elevation, pile splicing is required, which delays the construction period and wastes manpower and resources. When the concrete surface is higher than the design elevation, concrete is wasted, ranging from a few cubic meters to tens of cubic meters.

[0003] In the existing technology, such as the authorized announcement number CN216515605U, this utility model belongs to the field of practical tools for mud-wall cast-in-place piles in construction engineering, specifically involving a pile top elevation control device for drilled cast-in-place piles. It is applicable to pile top elevation control in mud-wall cast-in-place pile technology under all geological conditions. To solve the problems of over-pouring and under-pouring of concrete, the device includes a fixed bracket for hanging on a steel casing, a suspension ring connected to the fixed bracket and suspended in the steel casing, and a telescopic rod passing through the suspension ring for telescopic movement. The pole is suspended from the suspension ring by a float at the top, with the pole hanging vertically. The last section of the telescopic pole has a lower floating grate that can slide along the pole and be fixed at any height. The telescopic pole slide is opened in the middle of the lower floating grate, and multiple leakage holes for filtering concrete aggregate are opened around the perimeter. This top elevation control device uses the float and concrete floating grate to determine whether the concrete pouring surface has reached the design elevation. The upper floating grate and float provide prediction, and the lower floating grate provides secondary confirmation to avoid over-pouring of concrete, thereby achieving the purpose of saving costs.

[0004] The aforementioned patent uses a float structure and a telescopic rod telescopic structure, which are unstable. When in use, it needs to be set on one side of the entire injection hole. When injection is not vibrated, there will be a deviation between one side and the other side. The small-area floating support is inaccurate, and the telescopic rod structure is easy to jam, making the structure not sturdy. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a drilling pile top elevation control device. A ring-shaped support float main structure is set in a large area inside the pile hole. The floating measuring scale rod on its surface measures the grouting depth. Its floating support area is large, making it more accurate. It also has a detachable sliding lifting structure, which is more accurate and the structure is sturdy.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A device for controlling the top elevation of a bored pile includes a bored pile hole, an insertion pipe extending into the inner side of the bored pile hole, and a support positioning plate body fitted onto the outer surface of the insertion pipe. The support positioning plate body adopts a folded plate structure and is fixed to the outer surface of the reinforcing cage around the bored pile hole. A floating measuring scale rod is slidably inserted into the inner surface of the support positioning plate body. An annular support float body is fixedly connected to the lower surface of the floating measuring scale rod. The outer surface of the floating measuring scale rod is provided with scale lines. The annular support float body structure is set over a large area inside the bored pile hole. The floating measuring scale rod on its surface measures the grouting depth. Its large floating support area makes it more accurate, and the detachable sliding lifting structure makes it even more accurate and the structure is robust.

[0008] Furthermore, the floating measuring scale rods are distributed on the upper surfaces of the left and right sides of the annular support float body, and the surface of the support positioning plate body body is provided with an insertion port, through which the floating measuring scale rods are inserted into the inner surface of the insertion port of the support positioning plate body body.

[0009] Furthermore, the floating measuring scale rod adopts a round rod structure, and its upper end face is provided with a bulge.

[0010] Furthermore, the outer surface of the supporting positioning plate base body is provided with a threaded hole, and the inner surface of the threaded hole is connected with a threaded set screw.

[0011] Furthermore, a threaded hole is provided on one side of the main body of the support positioning plate, and a bolt is connected to the inner surface of the threaded hole, which is tightened and fixed to the floating measuring scale rod.

[0012] Furthermore, the surface of the main body of the support positioning plate is provided with a circular opening, and the inner surface of the circular opening of the main body of the support positioning plate is sleeved on the outer surface of the injection tube.

[0013] Furthermore, the main body of the annular support float adopts an annular rubber airbag structure with rounded corners on both the inside and outside.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) A large-area ring-shaped support float main structure is set in the grouting pile hole. The surface of the float is used to measure the grouting depth. The floating support area is large, which is more accurate. The detachable sliding lifting structure is also more accurate and the structure is solid. Attached Figure Description

[0016] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the overall structure of this utility model in use.

[0019] Figure 4 This is a schematic diagram showing the distribution relationship between the floating measuring scale rod and the main body of the annular support float of this utility model;

[0020] Figure 5 This is a top view of the overall structure of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Grouting pile hole, 2. Grouting pipe, 3. Support positioning plate base body, 4. Ring support float body, 5. Floating measuring scale rod, 6. Scale line, 7. Bulged protrusion, 8. Threaded set screw, 9. Bolt, 30. Circular opening. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figure 1-5A device for controlling the top elevation of a bored pile includes a bored pile hole 1, a grouting pipe 2 extending into the inner side of the bored pile hole 1, a support positioning plate seat body 3 sleeved on the outer surface of the grouting pipe 2, the support positioning plate seat body 3 adopts a folded plate structure, the support positioning plate seat body 3 is fixed to the outer surface of the reinforcing cage around the bored pile hole 1, a floating measuring scale rod 5 is slidably inserted into the inner surface of the support positioning plate seat body 3, an annular support float body 4 is fixedly connected to the lower surface of the floating measuring scale rod 5, and scale lines 6 are set on the outer surface of the floating measuring scale rod 5. The annular support float body structure is set in a large area inside the bored pile hole, and the floating measuring scale rod on its surface measures the grouting depth. Its floating support area is large, which is more accurate, and the detachable sliding lifting structure is more accurate and the structure is sturdy.

[0026] The floating measuring scale rods 5 are distributed on the upper surfaces of the left and right sides of the annular support float body 4. The surface of the support positioning plate body 3 is provided with an insertion port, and the floating measuring scale rods 5 are inserted into the inner surface of the insertion port of the support positioning plate body 3.

[0027] The floating measuring scale rod 5 adopts a round rod structure, and a raised head 7 is provided on its upper end face; the raised head 7 can position the floating measuring scale rod 5 and prevent the floating measuring scale rod 5 from sliding downward and falling off.

[0028] The outer surface of the support positioning plate base body 3 is provided with a threaded hole, and the inner surface of the threaded hole is connected with a threaded screw 8. When in use, the support positioning plate base body 3 can be locked outside the steel cage of the grouting pile hole 1, and its locking threaded screw 8 is used to lock and fix it firmly.

[0029] A threaded hole is provided on one side of the main body 3 of the support positioning plate. A bolt 9 is connected to the inner surface of the threaded hole. The bolt 9 is tightened and fixed to the floating measuring scale rod 5. The floating measuring scale rod 5 can be locked and positioned when not being filled. When filling, the bolt 9 is loosened to disengage the floating measuring scale rod 5, allowing it to rise and fall freely. It is convenient and flexible to use.

[0030] The surface of the support positioning plate base body 3 is provided with a circular opening 30. The inner surface of the circular opening 30 of the support positioning plate base body 3 is sleeved on the outer surface of the injection tube 2, which facilitates the insertion of the injection tube 2 and makes it convenient to use.

[0031] The main body of the ring-shaped support float 4 adopts a ring-shaped rubber airbag structure with rounded corners on the inside and outside, which has good buoyancy. When the main body of the ring-shaped support float 4 rises and falls, it avoids being obstructed by objects.

[0032] In use, a grouting pipe 2 is inserted through the inner side of the grouting pile hole 1. A support positioning plate body 3 is sleeved on the outer surface of the grouting pipe 2. The support positioning plate body 3 adopts a folded plate structure and is fixed to the outer surface of the reinforcing cage around the grouting pile hole 1. A floating measuring scale rod 5 is slidably inserted into the inner surface of the support positioning plate body 3. A ring-shaped support float body 4 is fixedly connected to the lower surface of the floating measuring scale rod 5. A scale line 6 is set on the outer surface of the floating measuring scale rod 5. In use, concrete is poured through the grouting pipe 2. After the concrete rushes out from the bottom, it can lift the ring-shaped support float body 4, which can drive the floating measuring scale rod 5 upwards. Observing the scale line of the floating measuring scale rod 5 allows for... The pouring depth is determined by a large-area annular support float 4, which provides accurate pouring within the pile hole 1. It is easy to use and has a simple, robust structure. The floating measuring rod 5 and the support rod 3 are separate structures, preventing jamming. The floating measuring rod 5 is a round rod with a raised head 7 on its upper end face. The raised head 7 positions the floating measuring rod 5, preventing it from sliding downwards and falling off. The outer surface of the support positioning plate body 3 has a threaded hole, and the inner surface of the threaded hole is connected to a threaded screw 8. During use, the support positioning plate body 3 can be locked outside the reinforcing cage of the pile hole 1, and the locking threaded screw 8 secures it firmly.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A bored pile top elevation control device, comprising a bored pile hole (1), characterized in that: A grouting pipe (2) is inserted into the inner side of the grouting pile hole (1). A support positioning plate body (3) is sleeved on the outer surface of the grouting pipe (2). The support positioning plate body (3) adopts a folded plate structure. The support positioning plate body (3) is fixed on the outer surface of the reinforcing cage around the grouting pile hole (1). A floating measuring scale rod (5) is slidably inserted into the inner surface of the support positioning plate body (3). A ring-shaped support float body (4) is fixedly connected to the lower surface of the floating measuring scale rod (5). A scale line (6) is set on the outer surface of the floating measuring scale rod (5).

2. The bored pile top elevation control device according to claim 1, characterized in that: The floating measuring scale rod (5) is distributed on the upper surface of the left and right sides of the annular support float body (4). The surface of the support positioning plate body (3) is provided with an insertion port, and the floating measuring scale rod (5) is inserted into the inner surface of the insertion port of the support positioning plate body (3).

3. The bored pile top elevation control device according to claim 1, characterized in that: The floating measuring scale rod (5) adopts a round rod structure, and its upper end face is provided with a bulging head (7).

4. The device for controlling the top elevation of a bored pile according to claim 1, characterized in that: The outer surface of the support positioning plate body (3) is provided with a threaded hole, and the inner surface of the threaded hole is connected with a threaded set screw (8).

5. The device for controlling the top elevation of a bored pile according to claim 1, characterized in that: A threaded hole is provided on one side of the main body (3) of the support positioning plate, and a bolt (9) is connected to the inner surface of the threaded hole. The bolt (9) is tightened and fixed to the floating measuring scale rod (5).

6. The device for controlling the top elevation of a bored pile according to claim 1, characterized in that: The surface of the support positioning plate body (3) is provided with a circular opening (30), and the inner surface of the circular opening (30) of the support positioning plate body (3) is sleeved on the outer surface of the injection pipe (2).

7. The device for controlling the top elevation of a bored pile according to claim 1, characterized in that: The annular support float body (4) adopts an annular rubber airbag structure with rounded corners on its inner and outer sides.

Images