Device for detecting bottom diameter of underreamed pile

Abstract

The utility model belongs to the field of pile foundation engineering, and particularly relates to an expanded bore pile bottom diameter detection device which is used for detecting whether the expanded bore pile bottom diameter meets design requirements or not. At present, a device capable of detecting the diameter of the bottom of an expanded bore pile in an economical, efficient and rapid method is lacked in the market, and the hidden danger of influencing the construction quality exists in the operation process of the device. The utility model provides an expanded bore pile bottom diameter detection device. Through the rotating connection relation between the detection rod and the supporting frame, the technical problems that the detection difficulty of the bottom diameter of the underreamed pile is large, and the detection device is complex to operate are solved. The device comprises a support frame, a detection rod, a rope A and a rope B, the two sides of the horizontally-arranged supporting frame are rotationally connected with detection rods correspondingly. The detection rod can rotate outwards to a horizontal position around the joint of the detection rod and the support frame; the supporting frame is connected with a rope A used for vertically lifting the device; each detection rod is connected with a rope B used for driving the detection rod to rotate around the joint of the detection rod and the supporting frame.

Description

Technical Field

[0001] The utility model belongs to the field of pile foundation engineering, and particularly relates to a device for detecting the bottom diameter of an under-reamed pile, which is used to detect whether the bottom diameter of the under-reamed pile meets the design requirements. Background Art

[0002] For the construction of pile foundation projects with low foundation bearing capacity, building under-reamed piles have been widely used due to their good economy and safety. As an important parameter for the construction of the bottom of the under-reamed pile, ensuring that it meets the design requirements (that is, the bottom diameter of the under-reamed pile cannot be less than the set length) is crucial for the quality control of pile foundation construction. For under-reamed piles reaching a certain depth, manual inspection by going down the well has significant safety hazards, while the ultrasonic hole-forming inspection method has the defects of high cost and complex operation.

[0003] Currently, there is a lack of a device in the market that can detect the bottom diameter of under-reamed piles in an economical, efficient, and fast way, and there are also potential hazards affecting the construction quality during the operation of the device. Specifically speaking, how to quickly and safely send the detection device to the detection area of the under-reamed pile, how to quickly and efficiently detect whether the bottom diameter of the under-reamed pile meets the design requirements in the detection area, and how to make the detection device have the characteristics of simple installation and operation, high reuse rate, and local material processing and manufacturing has become an urgent problem in the industry. Summary of the Utility Model

[0004] In view of this, the utility model provides a device for detecting the bottom diameter of an under-reamed pile; by virtue of the rotational connection relationship between the detection rod and the support frame, the technical problems of great difficulty in detecting the bottom diameter of the under-reamed pile and complex operation of the detection device are solved.

[0005] The diameter detection device includes: a support frame, a detection rod, a rope A, and a rope B;

[0006] The detection rods are respectively rotatably connected to both sides of the horizontally arranged support frame;

[0007] The detection rod can rotate outward around its connection with the support frame to a horizontal position;

[0008] A rope A is connected to the support frame for vertically lifting the device;

[0009] A rope B is connected to each detection rod for driving the detection rod to rotate around its connection with the support frame.

[0010] Preferably, both the support frame and the detection rod have a U-shaped cross-section, and the opening of the U-shaped cross-section faces downward.

[0011] A through hole A is provided at each end of the front and rear side plates A of the support frame in the length direction.

[0012] Through holes B are provided at positions corresponding to the through holes A at both ends of the front and rear side plates B of the detection rod in the length direction.

[0013] The connecting rod passes through the through hole A and the through hole B, enabling the support frame and the detection rod to be rotatably connected.

[0014] Preferably, the detection rod has a rectangular cross-section.

[0015] One through hole A is provided at each end of the front and rear side plates A of the support frame in the length direction.

[0016] The detection rod has two front and rear side plates B, and through holes B are provided at positions corresponding to the through holes A at both ends of the side plates B in the length direction.

[0017] The connecting rod passes through the through hole A and the through hole B, enabling the support frame and the detection rod to be rotatably connected.

[0018] Preferably, a limiting mechanism is provided on the support frame for limiting when the detection rod rotates to the horizontal position.

[0019] Preferably, the limiting mechanism is a limiting rod horizontally arranged above the rotation connection of the detection rod and the support frame.

[0020] Preferably, a counterweight is further provided on the support frame.

[0021] Preferably, several detection rods with the same quantity are sequentially connected to both sides of the support frame, and the adjacent detection rods are rotatably connected.

[0022] Preferably, the support frame and the detection rod are made of aluminum alloy or steel material.

[0023] Preferably, the rope A and the rope B are steel wire ropes or cotton ropes.

[0024] Beneficial effects

[0025] (1) The diameter detection device can quickly lower the device to the working area through the rope A, and pull the detection rod connected below it through the rope B, enabling the detection rod to rotate around the support frame to the horizontal position to detect the diameter of the bottom of the under-reamed pile, so as to judge whether the diameter of the bottom of the under-reamed pile meets the design requirements; the diameter detection device has the characteristics of simple structure and easy operation.

[0026] (2) Several detection rods connected end to end are connected to both sides of the support frame of the diameter detection device, enabling the overall length of the detection rod to be adaptively adjusted according to the size of the area to be detected, and meeting the detection requirements for different diameters of the bottom of the under-reamed pile.

[0027] (3) The counterweight can change the descending speed of the diameter detection device to meet the requirements for the descending speed of the diameter detection device in different working environments.

[0028] (4) The support frame and the detection rod adopt prefabricated building components with a U-shaped cross-section, cooperate with common steel wire ropes or cotton ropes as rope A and rope B, and a simple side hole opening process, making the diameter detection device easy to obtain local materials, simple to process and manufacture, and easy to popularize.

[0029] (5) A limiting mechanism is provided on the support frame, which can quickly rotate the detection rod to the horizontal position, improving the operational simplicity of the device. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the diameter detection device;

[0031] Figure 2 is a side view of the support frame and the detection rod of the diameter detection device in a horizontal state;

[0032] Figure 3 is a schematic structural diagram of the device in the case of Embodiment 5;

[0033] Figure 4 is a schematic diagram of the use state of the diameter detection device;

[0034] Wherein, 1 - support frame, 2 - detection rod, 3 - rope A, 31 - rope B, 4 - side plate A, 5 - through hole A, 6 - side plate B, 7 - through hole B, 8 - connecting rod, 9 - limiting rod, 10 - counterweight, 11 - ground. Detailed Embodiments

[0035] The present invention will be further described below with reference to the drawings: It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific embodiments. Any other embodiments obtained by those skilled in the art according to the technical solutions of the present invention also fall within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] As Figures 1-4As shown in the figure, a device for detecting the bottom diameter of an under-reamed pile includes a support frame 1, a detection rod 2, a rope A 3, and a rope B 31. The support frame 1 is a rectangular strip structure, and a detection rod 2 is rotatably connected to each side of its length direction. One end of the detection rod 2 can rotate around its connection with the support frame 1. In the middle of the upper end face of the support frame 1, there is a rope A 3 for vertically lifting the detection device and lowering the detection device from the ground 11 to the operation area. In the middle of the upper end face of the detection rod 2, there is a rope B 31. By means of lifting, the angle between the detection rod 2 and the support frame 1 is changed. When the detection rods 2 on both sides of the support frame 1 rotate outward to a horizontal position parallel to the support frame 1, the total length of the link structure formed by the support frame 1 and the detection rod 2 is consistent with the design requirement of the bottom diameter of the under-reamed pile (that is, the total length of the link structure formed by the support frame 1 and the detection rod 2 is the minimum value of the required bottom diameter of the under-reamed pile). Thus, it is used to detect whether the bottom diameter of the under-reamed pile meets the design requirements.

[0038] The device descends from the external area of the under-reamed pile (on the ground 11) to the internal area of the under-reamed pile (below the ground 11) through the rope A 3 and the rope B 31. Specifically, during the descent, the rope A 3 vertically lowers the support frame 1 at the center position of the under-reamed pile (the support frame 1 should descend vertically along the central axis direction of the under-reamed pile). When the rope B 31 does not apply a pulling force to the detection rod 2, the detection rod 2 hangs down under its own weight below the support frame 1 and descends together with the support frame 1. After reaching the bottom of the under-reamed pile, an upward pulling force is applied to the detection rod 2 through the rope B 31, causing the detection rod 2 to rotate around its connection with the support frame 1. If one side or both sides of the detection rod 2 cannot rotate outward to a horizontal position parallel to the support frame 1, it indicates that the bottom diameter of the under-reamed pile does not meet the design requirements (that is, the bottom diameter of the under-reamed pile is smaller than the design requirements). If both sides of the detection rod 2 can rotate outward to a horizontal position parallel to the support frame 1, it indicates that the bottom diameter of the under-reamed pile at the current position meets the design requirements.

[0039] Then, further determine whether the bottom diameter at each position of the current circumference meets the design requirements. The determination method is as follows: Keep the detection rods 2 on both sides in a horizontal state, the rope A 3 fixedly hangs the support frame 1, and the rope B 31 drives the detection rod 2 to rotate one week with the rope A 3 as the center to determine whether the diameters at each position in the circumferential direction meet the requirements. This detection device utilizes the rotational connection relationship between the support frame 1 and the detection rod 2, combined with the vertical pulling force of the rope A 3 on the support frame 1 and the rotation of the detection rod 2 driven by the rope B 31, to achieve the purpose of detecting the bottom diameter of the under-reamed pile, and has the characteristics of simple structure and convenient operation.

[0040] Embodiment 2:

[0041] As Figures 1-2 shown, on the basis of the above-mentioned Embodiment 1, this embodiment gives the specific structural forms of the support frame 1 and the detection rod 2.

[0042] As an example, both the support frame 1 and the detection rod 2 have a U-shaped cross-section with the opening facing downwards. For example, the support frame 1 and the detection rod 2 are channel steels.

[0043] The support frame 1 has a top plate and two front and rear side plates A4. At each end of the length direction of each side plate A4, there is a through hole A5 provided. The detection rod 2 has a top plate and two front and rear side plates B6. At the positions corresponding to the through holes A5 at both ends of the length direction of each side plate B6, through holes B7 are provided (the through hole A5 and the through hole B7 are coaxial); the connecting rod 8 passes through the through hole A5 and the through hole B7, so that the support frame 1 and the detection rod 2 are rotatably connected (that is, taking the connecting rod 8 as a pin shaft to realize the pin connection between the support frame 1 and the detection rod 2).

[0044] Embodiment Three:

[0045] As Figures 1-2 shown, as an example, the support frame 1 has a U-shaped cross-section with the opening facing downwards, the detection rod 2 has a rectangular cross-section, the top and bottom of the detection rod 2 have a top plate and a bottom plate, and its front and rear sides are two side plates B6. At the positions corresponding to the through holes A5 at both ends of the length direction of each side plate B6, through holes B7 are provided (the through hole A5 and the through hole B7 are coaxial).

[0046] Embodiment Four:

[0047] As Figures 1-2 shown, based on any one of Embodiments One to Three, a further solution further includes a limiting mechanism, and the limiting mechanism is used for limiting the detection rod 2 when it rotates to the horizontal position; when an upward pulling force is applied to the detection rod 2 through the rope B31 and the detection rod 2 rotates to the horizontal position parallel to the support frame 1, the detection rod 2 contacts the limiting mechanism, indicating that the detection rod 2 rotates in place.

[0048] As an example, two limiting mechanisms are provided between the two side plates A4, respectively used for limiting the two side detection rods 2 when they rotate to the horizontal position; one limiting mechanism is provided at each end of the length direction of the support frame 1, and each limiting mechanism includes a horizontally arranged limiting rod 9. The limiting rod 9 can limit the detection rod 2 in the horizontal position parallel to the support frame 1.

[0049] As an example, the diameter detection device further includes a counterweight 10; the counterweight 10 is arranged on the support frame 1 and is directly connected to the support frame 1; or, the counterweight 10 is hung below the support frame 1. The purpose of setting the counterweight 10 is to change the self-weight of the entire detection device and change the falling speed of the device to meet the requirements of different working environments for the falling speed.

[0050] As an example, the support frame 1 and the detection rod 2 are made of aluminum alloy or steel material.

[0051] As an example, the configuration block 10 is made of common materials at the construction site, for example, steel bar blocks, steel sheets, bricks.

[0052] As an example, the rope A3 and the rope B31 are made of steel wire ropes or cotton ropes.

[0053] By using common materials at the construction site as the support frame 1, the detection rod 2, the counterweight block 10, and the ropes A3 and B31, the detection device has the practical effects of being convenient for obtaining materials locally, simple in processing and production, and easy to popularize and promote.

[0054] Embodiment Five:

[0055] As Figure 3 shown, for the case where the bottom diameter of the under-reamed pile is relatively large, on the basis of the above Embodiment Two, the further solution further includes: a plurality of detection rods 2 with the same number are sequentially connected to both sides in the length direction of the support frame 1; the plurality of detection rods 2 on the same side are connected end to end, and the adjacent detection rods 2 are rotatably connected. A rope B31 is connected to each detection rod 2 for pulling the corresponding detection rod 2 to rotate.

[0056] By arranging the same number of detection rods 2 on both sides of the support frame 1 and making the adjacent two detection rods 2 rotatably connected, combined with the rope B31 connected to each detection rod 2, the overall length formed by connecting the detection rods 2 end to end has an adjustable feature, and different numbers of detection rods 2 can be set according to the diameter size of the area to be detected, meeting the detection requirements for different bottom diameters of under-reamed piles.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for detecting the bottom diameter of a base-enlarged pile, characterized in that: include: A support frame (1), a detection rod (2), a rope A (3) and a rope B (31); Both sides of the horizontally arranged support frame (1) are rotatably connected to detection rods (2); The detection rod (2) can rotate outwards around the connection between it and the support frame (1) to a horizontal position; The support frame (1) is connected with a rope A (3) for vertically lifting the device; Each detection rod (2) is connected to a rope B (31) for driving the detection rod (2) to rotate around the connection between the detection rod and the support frame (1).

2. The device for detecting the bottom diameter of a base-enlarged pile according to claim 1, characterized in that: The support frame (1) and the detection rod (2) both have a U-shaped cross section, and the U-shaped cross section opens downward. A through hole A (5) is respectively provided at both ends of the front and rear side plates A (4) of the support frame (1) in the length direction; Through holes B (7) are provided at positions corresponding to the through holes A (5) at both ends of the front and rear side plates B (6) of the detection rod (2) in the length direction; The connecting rod (8) passes through the through hole A (5) and the through hole B (7), so that the supporting frame (1) and the detection rod (2) are rotatably connected.

3. The device for detecting the bottom diameter of a base-enlarged pile according to claim 1, characterized in that: The detection rod (2) has a rectangular cross section; The front and rear side plates A (4) of the support frame (1) are each provided with a through hole A (5) at both ends in the length direction; The detection rod (2) has two side plates B (6) at the front and rear ends of the side plates B (6), and through holes B (7) are provided at positions corresponding to the through holes A (5) at both ends of the side plates B (6) in the length direction; The connecting rod (8) passes through the through hole A (5) and the through hole B (7), so that the supporting frame (1) and the detection rod (2) are rotatably connected.

4. A device for detecting the bottom diameter of a base-enlarged pile according to any one of claims 1 to 3, characterized in that: The support frame (1) is provided with a limiting mechanism for limiting the position of the detection rod (2) when it is rotated to a horizontal position.

5. The device for detecting the bottom diameter of a base-enlarged pile according to claim 4, characterized in that: The limiting mechanism is a limiting rod (9) horizontally arranged above the rotational connection between the detection rod (2) and the support frame (1).

6. A device for detecting the bottom diameter of a base-enlarged pile according to any one of claims 1 to 3, characterized in that: It also includes a counterweight block (10) arranged on the support frame (1).

7. A device for detecting the bottom diameter of a base-enlarged pile according to any one of claims 1 to 3, characterized in that: A plurality of detection rods (2) of the same number are sequentially connected to both sides of the support frame (1), and adjacent detection rods (2) are rotatably connected to each other.

8. A device for detecting the bottom diameter of a base-enlarged pile according to any one of claims 1 to 3, characterized in that: The support frame (1) and the detection rod (2) are made of aluminum alloy or steel.

9. A device for detecting the bottom diameter of a base-enlarged pile according to any one of claims 1 to 3, characterized in that: The rope A (3) and the rope B (31) are steel wire ropes or cotton ropes.

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