Soft soil stratum pile foundation remaining hole anti-collapse device
The collapse of the pile foundation pit in soft soil was solved by using a cylindrical steel cage and an airbag support device, which ensured the quality of concrete pile forming, improved equipment utilization, and reduced construction costs.
Patent Information
- Application Number
- CN202520060459.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-10
AI Technical Summary
In soft soil strata, the borehole openings of pile foundations are prone to collapse, and inserting casings affects the formation of concrete piles. Existing technologies cannot effectively prevent borehole collapse and have low equipment utilization rates.
The anti-collapse device consists of a cylindrical steel cage, support rods, airbags, and lifting rings. The steel cage supports the placement holes, the airbags support the side walls, the pads reduce pressure, the lifting rings facilitate lifting, and the cover plate prevents debris from entering.
It effectively prevents borehole collapse, ensures the quality of concrete pile forming, improves equipment utilization, and reduces construction costs.
Smart Images
Figure CN223660861U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pile foundation construction, specifically to a device for preventing collapse of pile foundation holes in soft soil strata. Background Technology
[0002] After the pile foundation grouting is completed and the casing is removed, the concrete at the top of the pile is usually still a certain distance from the original ground. It is necessary to protect the pile foundation grouting hole to prevent the hole from collapsing.
[0003] In existing methods for preventing collapse of the borehole openings used in pile foundation grouting, simple covering with a cover plate is generally used to prevent falling objects from causing the opening to collapse. However, due to the high water content, numerous pores, high compressibility, poor permeability, and lack of shear strength of soft soil layers, the borehole wall may collapse even when it is stationary. At the same time, it is not possible to simply insert a casing, otherwise it will affect the formation and solidification of the concrete pile below, resulting in substandard quality at the top of the concrete pile. Using a crane to directly suspend and lift the casing will occupy the hoisting equipment for a long time, resulting in low equipment turnover and utilization, which invisibly increases the construction cost.
[0004] To address this issue, a device for preventing collapse of pile foundation holes in soft soil strata is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a device for preventing the collapse of the hole in the pile foundation in soft soil, which solves the problem that the hole opening collapses and the direct insertion of the casing affects the formation of the concrete pile.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A device for preventing collapse of pile foundation holes in soft soil strata includes a cylindrical steel cage, a support rod, an airbag, and a lifting ring;
[0008] A cylindrical steel reinforcement cage with a radius smaller than the pile foundation placement hole;
[0009] Support rods are provided in multiples along the radial direction of the cylindrical steel cage, with one end connected to the top of the cylindrical steel cage and the other end provided with a pad.
[0010] Airbags are installed on the side walls of the cylindrical steel cage;
[0011] The lifting ring is set at the top of the cylindrical steel cage.
[0012] As a further technical solution to the above solution, multiple airbags are symmetrically arranged.
[0013] As a further technical solution to the above scheme, the top of the cylindrical steel cage is also provided with a placeholder block, and a warning sign is provided on the placeholder block.
[0014] As a further technical solution to the above scheme, the bottom of the cylindrical steel cage is covered with a cover plate.
[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0016] This invention uses a cylindrical steel cage to support the placement hole, and uses an airbag to support the side wall of the placement hole, further improving the support effect. At the same time, the pad reduces the pressure of the whole device on the ground, preventing the hole from collapsing while not affecting the formation of the concrete pile below, thus ensuring the smooth progress of construction. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0018] The labels in the diagram are as follows: cover plate-1; cylindrical steel cage-2; support rod-3; airbag-4; lifting ring-5; placeholder block-6; pad plate-7. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so as to provide a better understanding of the concept of the present utility model, the technical problem solved, the technical features constituting the technical solution and the technical effects brought about.
[0020] like Figure 1 As shown, a device for preventing collapse of pile foundation holes in soft soil includes a cylindrical steel cage 2, a support rod 3, an airbag 4, and a lifting ring 5.
[0021] 2. Cylindrical steel cage, with a radius smaller than the pile foundation placement hole;
[0022] Support rods 3 are provided in multiple radial directions along the cylindrical steel cage 2, with one end connected to the top of the cylindrical steel cage 2 and the other end provided with a pad 7.
[0023] Airbag 4 is installed on the side wall of the cylindrical steel cage 2;
[0024] The lifting ring 5 is set on the top of the cylindrical steel cage 2.
[0025] In this embodiment, the support rod 3 is first placed on top of the cylindrical steel cage 2, and a pad 7 is placed at the end of the support rod 3. The lifting device is then activated externally to lift the lifting ring 5, aligning the cylindrical steel cage 2 with the pile foundation's retaining hole, and lowering it into the hole. At this time, the pad 7 contacts the ground outside the retaining hole, reducing the pressure on the ground at the hole opening and preventing the entire cylindrical steel cage 2 from sinking and causing the hole to collapse. After the cylindrical steel cage 2 falls and the pad 7 contacts the ground, the air pump is activated. The air pump is connected to the airbag 4 through an air supply pipe. After the airbag 4 inflates, it presses against the inner wall of the retaining hole, further improving the support effect. When the concrete pile below has reached the curing period, the air valve is opened to release the air, causing the airbag 4 to shrink, making it easier to lift the cylindrical steel cage 2 out, completing the entire support process. Multiple lifting rings 5 can be symmetrically arranged for convenient and stable lifting.
[0026] In a preferred embodiment, multiple airbags 4 are symmetrically arranged. Having multiple airbags 4 allows for support at different locations on the sidewalls, improving the support effect.
[0027] like Figure 1 As shown in the preferred embodiment, the top of the cylindrical steel cage 2 is also provided with a spacer block 6, and a warning sign is provided on the spacer block 6. In this embodiment, the spacer block 6 can be used with a warning sign to remind passing construction personnel that there is a retaining hole here, so as to prevent heavy equipment or other transportation devices from approaching and causing the hole to collapse.
[0028] like Figure 1 As shown, in a preferred embodiment, the bottom of the cylindrical reinforcing cage 2 is covered with a cover plate 1. In this embodiment, the cover plate 1 is located at the bottom of the cylindrical reinforcing cage 2 to prevent external debris from falling into the retention hole and affecting the curing of the concrete pile below.
[0029] The terms "connection" and "fixing" appearing in this utility model description can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this utility model should be understood according to the specific circumstances.
[0030] In the description of this utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used only to indicate the orientation or positional relationship for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A device for preventing collapse of pile foundation holes in soft soil strata, characterized in that: The cylindrical reinforcement cage (2), the support rod (3), the air bag (4) and the lifting ring (5) are included. The cylindrical reinforcement cage (2) has a radius smaller than that of the pile foundation hole; The support rod (3) is provided with a plurality of support rods along the radial direction of the cylindrical reinforcement cage (2), one end of which is connected to the top of the cylindrical reinforcement cage (2), and the other end is provided with a base plate (7); The air bag (4) is arranged on the side wall of the cylindrical reinforcement cage (2). The lifting ring (5) is arranged on the top of the cylindrical reinforcement cage (2).
2. The hole collapse prevention device for pile foundation in soft soil layer according to claim 1, characterized in that: The air bag (4) is symmetrically provided with a plurality of air bags.
3. The hole collapse prevention device for pile foundation in soft soil layer according to claim 1, characterized in that: The top of the cylindrical reinforcement cage (2) is further provided with a placeholder (6), and the placeholder (6) is provided with a warning sign.
4. The hole collapse prevention device for pile foundation in soft soil layer according to claim 1, characterized in that: The bottom of the cylindrical reinforcement cage (2) is covered with a cover plate (1).