Cast-in-situ bored pile top height detection device
By designing a drilling pile top height detection device including a load stage, telescopic legs, rolling roller and induction parts, the state changes of the buoyant induction parts and floats are used to solve the error problem of pile top height detection, precise control is achieved, and concrete waste and quality problems are reduced.
Patent Information
- Application Number
- CN202421722295.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the prior art, there are large errors in the detection of pile top height of drilling and filling piles, resulting in waste of concrete or pile quality problems.
A detection device including a load stage, telescopic legs, a rolling roller, a rope and an induction piece is designed to control the pile top height by changing the buoyancy of the induction piece on the mud and concrete surfaces, and to achieve accurate detection in combination with float and motor operation.
More accurate pile top height control is achieved, reducing concrete waste and pile quality problems, and improving the accuracy of inspection.
Smart Images
Figure CN223088501U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cast-in-place pile construction, in particular to a device for detecting the top height of bored cast-in-place piles. Background Technique
[0002] Bored cast-in-place piles are key parts in the quality control of structures such as bridges, building construction, and support. There are often certain contradictions between cost management and quality control in the construction process. How to balance construction cost and quality is crucial during the project implementation. In the construction of bored cast-in-place piles, it is necessary to ensure the project quality as the premise. To do a good job in cost control, it should be ensured that the concrete consumption is minimized under the condition of meeting the design, specifications, and inspection standards. "Dummy piles", as the parts that are extremely likely to cause excessive concrete consumption in bored cast-in-place piles, the control of their height is the key to ensuring that the concrete is not over-consumed.
[0003] The existing detection methods for controlling the top height of bored cast-in-place piles mainly use sounding weights for detection. A sounding weight is a device formed by connecting a metal hammer body with a measuring rope with length marks. The method of using a sounding weight to detect the top height of a pile is that during the concrete pouring of a bored cast-in-place pile, the surveyor holds the measuring rope and slowly lowers the sounding weight into the pile hole. When the sounding weight reaches the interface between the concrete top surface and the mud (or water), the sinking speed of the hammer body slows down due to the resistance of the concrete compared to the mud (or water). At this time, the height position of the pile top can be calculated based on the length marks on the measuring rope and the elevation of the top of the casing of the bored cast-in-place pile. When it is determined through continuous measurement that the top height of the concrete reaches the predetermined pile top height, the concrete pouring can be stopped.
[0004] When using a sounding weight to detect the top height of the concrete of a bored cast-in-place pile, due to the heavy weight of the sounding weight, the induction between the underwater concrete and the mud is not obvious. At the same time, this method determines the pile top height based on the surveyor's hand feeling. Due to the differences in work experience among different surveyors and the measurement induction errors of the coarse aggregate of the concrete, there are often large deviations in the control of the pile top height. Content of the Utility Model
[0005] In order to solve the above problems of the existing technology, the utility model provides a device for detecting the top height of bored cast-in-place piles, which solves the problems of large deviations in the control of the pile top height in the existing technology, resulting in concrete waste caused by excessive over-pouring height of the cast-in-place pile, or pile quality problems caused by insufficient over-pouring height.
[0006] To achieve the above object, the utility model provides the following technical solution: A device for detecting the height of the top of a bored cast-in-place pile, which includes a bearing platform and several telescopic legs rotatably connected to the periphery of the bearing platform. A support is fixedly connected to the upper end of the bearing platform, and a winding drum is rotatably connected inside the support. One end of the winding drum is connected to the output end of a rotating motor. A measuring rope is wound around the winding drum. The lower end of the measuring rope passes through a through hole opened on the bearing platform and is connected to a suspension ring on the sensing element. A float is installed at the position of the measuring rope between the sensing element and the winding drum.
[0007] With the above structural design, by adjusting the position of the telescopic legs, the height of the bearing platform can be adjusted, increasing the adaptability of the device. The rotating motor drives the winding drum to rotate to wind and unwind the measuring rope, which is convenient to operate and easy to control the length of the measuring rope.
[0008] Preferably, the sensing element is of a hollow cube structure, and an opening is provided at the upper end of the sensing element. A threaded plug with a sealing rubber gasket is threadedly connected to the opening.
[0009] With the above structural design, it is convenient to configure the weight of the sensing element. A threaded plug with a sealing rubber gasket is provided on one side of the sensing element, and fine sand is filled in the sensing element to configure the weight of the sensing element, so that the sensing element can sink in the mud and float above the concrete.
[0010] Preferably, the lower end of the telescopic leg is rotatably connected to a support plate, and a positioning nail is fixedly connected to the lower end of the support plate.
[0011] With the above structural design, setting the support plate increases the contact area between the device and the ground, enhances the overall stability of the device, and ensures the accuracy of the detection result. Setting the positioning nail increases the anchoring force between the support plate and the foundation.
[0012] Preferably, the distance from the float to the sensing element is equal to the distance from the top of the cast-in-place pile to the top of the steel casing.
[0013] With the above structural design, the measuring rope extends into the pile hole, the sensing element floats in the mud, and the float vertically floats on the mud liquid surface at the top of the steel casing. During the concrete pouring of the bored pile, the concrete liquid level at the top of the pile gradually rises. When the concrete height at the top of the pile reaches the position of the sensing element, the concrete provides an upward buoyancy force to the sensing element, causing the sensing element and the float to rise. When the sensing element reaches the predetermined height of the cast-in-place pile, the float changes from vertical suspension to horizontal floating state in the mud, and at this time, the concrete pouring stops.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] The measuring rope extends into the pile hole, the sensing element floats in the mud, and the float vertically floats on the opening of the steel casing, i.e., on the mud liquid surface. During the pouring of the bored pile concrete, the concrete liquid level at the pile top gradually rises. When the height of the concrete at the pile top reaches the position of the sensing element, the concrete provides an upward buoyancy force to the sensing element, causing the sensing element and the float to rise. When the sensing element reaches the predetermined height of the cast-in-place pile, the float changes from vertical suspension to horizontal floating in the mud. At this time, the pouring of the concrete is stopped, and the height of the cast-in-place pile in the borehole can be controlled more accurately, reducing the pouring error. It avoids the waste of concrete caused by excessive overpouring height of the cast-in-place pile or the quality problems of the formed pile caused by insufficient overpouring height. Description of the Drawings
[0016] Figure 1 is a schematic structural diagram of the present utility model;
[0017] Figure 2 is a schematic structural diagram of the support plate of the present utility model;
[0018] Figure 3 is a schematic structural diagram of the sensing element of the present utility model;
[0019] Figure 4 is a schematic diagram of the concrete pouring of the present utility model when it has not reached the predetermined height;
[0020] Figure 5 is a schematic diagram of the concrete pouring of the present utility model when it has reached the predetermined height. Detailed Embodiments
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] Please refer to Figures 1-5, the present utility model provides a technical solution: a device for detecting the height of the top of a bored cast-in-place pile, which includes a bearing platform 1 and three telescopic legs 2 rotatably connected to the periphery of the bearing platform 1. A bracket 4 is fixedly connected to the upper end of the bearing platform 1. A winding drum 6 is rotatably connected inside the bracket 4. One end of the winding drum 6 is connected to the output end of a rotating motor 7. A measuring rope 8 is wound around the winding drum 6. The lower end of the measuring rope 8 passes through a through hole opened on the bearing platform 1 and is connected to a hanging ring 10 on the sensing member 5. A floating buoy 9 is installed at the position of the measuring rope 8 between the sensing member 5 and the winding drum 6. By adjusting the position of the telescopic legs 2, the height of the bearing platform 1 can be adjusted, increasing the adaptability of the device. The rotating motor 7 drives the winding drum 6 to rotate to wind and unwind the measuring rope 8, which is convenient to operate and easy to control the length of the measuring rope 8.
[0023] The sensing member 5 is of a hollow cube structure. An opening is provided at the upper end of the sensing member 5, and a threaded plug 51 with a sealing rubber washer is threadedly connected to the opening. It is convenient to configure the weight of the sensing member 5. A threaded plug 51 with a sealing rubber washer is provided on one side surface of the sensing member 5. Fine sand is filled into the sensing member 5 to configure the weight of the sensing member 5, so that the sensing member 5 can sink in the mud and float above the concrete.
[0024] The lower end of the telescopic leg 2 is rotatably connected to a support plate 3, and a positioning nail 31 is fixedly connected to the lower end of the support plate 3. The setting of the support plate 3 increases the contact area between the device and the ground, enhances the overall stability of the device, and ensures the accuracy of the detection result. The setting of the positioning nail 31 increases the anchoring force between the support plate 3 and the foundation.
[0025] The distance from the floating buoy 9 to the sensing member 5 is equal to the distance from the top of the cast-in-place pile to the top of the steel casing 11.
[0026] Working principle: The measuring rope 8 extends into the pile hole, the sensing member 5 floats in the mud, and the floating buoy 9 vertically floats on the liquid surface of the mud, that is, on the top of the steel casing 11. During the pouring of the bored pile concrete, the concrete liquid level at the top of the pile gradually rises. When the concrete height at the top of the pile reaches the position of the sensing member 5, since the sensing member 5 can sink in the mud and float above the concrete. The concrete provides an upward buoyancy force to the sensing member 5, causing the sensing member 5 and the floating buoy 9 to rise. When the sensing member 5 reaches the predetermined height of the cast-in-place pile, the floating buoy 9 changes from vertical suspension to horizontal floating in the mud. At this time, the pouring of the concrete is stopped, and the height of the cast-in-place pile in the borehole can be controlled more accurately, reducing the pouring error. It avoids the waste of concrete caused by excessive over-pouring height of the cast-in-place pile or the quality problems of the formed pile caused by insufficient over-pouring height.
[0027] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A device for detecting the top height of a bored cast-in-place pile, characterized in that: It includes a bearing platform (1) and several telescopic legs (2) rotatably connected to the periphery of the bearing platform (1). A bracket (4) is fixedly connected to the upper end of the bearing platform (1). A winding drum (6) is rotatably connected inside the bracket (4). One end of the winding drum (6) is connected to the output end of a rotating motor (7). A measuring rope (8) is wound around the winding drum (6). The lower end of the measuring rope (8) passes through a through hole opened on the bearing platform (1) and is connected to a hanging ring (10) on the sensing member (5). A floating buoy (9) is installed at the position of the measuring rope (8) between the sensing member (5) and the winding drum (6).
2. The detection device for the pile top height of a bored cast-in-place pile according to claim 1, wherein: The sensing member (5) is of a hollow cube structure. An opening is provided at the upper end of the sensing member (5), and a threaded plug (51) with a sealing rubber gasket is threadedly connected to the opening.
3. The detecting device for the pile top height of a bored cast-in-place pile according to claim 1, characterized in that: The lower end of the telescopic leg (2) is rotatably connected to a support plate (3), and a positioning nail (31) is fixedly connected to the lower end of the support plate (3).
4. The detecting device for the pile top height of a bored cast-in-place pile according to claim 1, characterized in that: The distance from the floating buoy (9) to the sensing member (5) is equal to the distance from the top of the cast-in-place pile to the opening of the steel casing (11).