Recycling device for underwater pile foundation steel casing

Abstract

The utility model provides an underwater pile foundation steel casing recovery device, and belongs to the technical field of underwater pile foundation construction. The underwater pile foundation steel casing recycling device comprises an outer casing and an inner casing, a check ring is arranged at the position, as high as the lower end of the outer casing, of the inner casing, directional cushion blocks are evenly distributed on the outer wall of the inner casing, and the directional cushion blocks movably abut against the inner wall of the outer casing. In the application, the thin inner pile casing is supported by utilizing the directional cushion blocks uniformly distributed on the outer wall of the inner pile casing, and concrete is prevented from entering a gap between the outer pile casing and the inner pile casing by utilizing the check ring, so that clay does not need to be backfilled, the outer pile casing is easier to pull out, and the operation is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of underwater pile foundation construction, and in particular to an underwater pile foundation steel casing recovery device. Background Art

[0002] For underwater pile foundation construction, the use of extra-long steel casings is common. Since the pile foundation concrete forms a steel tube concrete effect with the steel casing after pouring, the steel casing can only be used once, so the construction cost is high.

[0003] In this regard, China's patent application number is CN201410764052.6, which discloses an underwater bored pile foundation construction system with recyclable steel casing and its construction method. The scheme mainly adopts an inner and outer double-layer steel casing. Through the follow-up of the inner steel casing and the coordinated use of the drill slag wall and the mud wall, the steel casing can be pulled out and recovered after the pile is formed, which reduces the construction cost of the bored pile and realizes the reuse of the steel casing.

[0004] However, in the process of implementing the technical solution in the embodiments of the present application, the inventor of the present application found that the above technology has at least the following technical problems:

[0005] 1. During the construction of the above scheme, the drilling slag in the gap between the outer steel casing and the inner steel casing and the new drilling slag in the inner steel casing are respectively extracted by a mud pump, and then clay is backfilled in the gap between the outer steel casing and the inner steel casing to provide support for the inner casing, which is a relatively troublesome operation.

[0006] 2. Moreover, when pulling out the outer casing, the clay in the gap causes great friction, and vibration is required to pull out the outer casing, which is a more troublesome operation. Utility Model Content

[0007] In order to make up for the above shortcomings, the present application provides an underwater pile foundation steel casing recovery device, which aims to improve the problems mentioned in the above background technology.

[0008] An embodiment of the present application provides an underwater pile foundation steel casing recovery device, comprising an outer casing and an inner casing, wherein a retaining ring is provided on the inner casing at a position at the same height as the lower end of the outer casing, and directional pads are evenly distributed on the outer wall of the inner casing, and the directional pads are movably pressed against the inner wall of the outer casing.

[0009] In a specific embodiment, the retaining ring includes an anti-spoiler plate, and the anti-spoiler plate is welded to the outer circle of the inner casing.

[0010] In the above implementation process, the spoiler is made of a steel plate with a thickness of 0.5 cm and is installed on the inner casing at the same height as the outer casing to play a role in blocking concrete.

[0011] In a specific embodiment, the spoiler is arranged in a conical shape.

[0012] In the above implementation process, the conical setting facilitates the insertion of the inner tube into the outer tube, and is also conducive to the fit between the spoiler and the inner wall of the outer casing, thereby better blocking the concrete.

[0013] In a specific embodiment, the retaining ring further includes a flexible anti-spoiler pad, and the anti-spoiler pad is installed above the anti-spoiler plate.

[0014] In the above implementation process, the anti-spoiler pad is a compressible flexible material, which is installed and fixed above the anti-spoiler plate, and fits more closely with the inner wall of the outer casing to isolate the concrete.

[0015] In a specific embodiment, the directional spacers are arranged in a circular array in each plane.

[0016] In the above implementation process, four directional pads are set on a plane, and the spacing between each layer can be arranged according to 2m to 3m, which plays a role in positioning the inner casing.

[0017] In a specific embodiment, the directional spacer includes a welding portion and an outer packaging portion, and the outer packaging portion is welded to the inner casing through the welding portion.

[0018] In the above implementation process, the welding part is steel bars, the steel bars are welded to the inner casing, and concrete is wrapped around the steel bars to form an outer covering part, which has stronger supporting force and is conducive to reducing costs.

[0019] In a specific embodiment, the inner casing is longer than the outer casing.

[0020] In the above implementation process, the inner casing is made of ordinary steel, and its length is preferably 1.5m to 2m longer than the outer casing. The thickness can generally be 0.5cm, which serves as a protective device when pouring concrete.

[0021] Compared with the prior art, the beneficial effects of the present application are: using directional pads evenly distributed on the outer wall of the inner casing to support the thin inner casing, and using a retaining ring to prevent concrete from entering the gap between the outer casing and the inner casing. Therefore, there is no need to backfill clay, and it is easier to pull out the outer casing, simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of an underwater pile foundation steel casing recovery device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the connection relationship between the directional pad and the inner casing provided in the embodiment of the present application;

[0025] Figure 3 A schematic diagram of the cross-sectional structure of the inner casing and the retaining ring provided in the embodiment of the present application;

[0026] Figure 4 Provided for the implementation of this application Figure 3 A partial enlarged schematic diagram in the middle.

[0027] In the figure: 10 - outer casing; 20 - inner casing; 30 - retaining ring; 31 - anti-spoiler plate; 32 - anti-spoiler pad; 40 - directional pad. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0029] See also Figure 1-Figure 4 The present application provides a steel casing recovery device for a pile foundation in water, comprising an outer casing 10 and an inner casing 20, wherein a retaining ring 30 is arranged on the inner casing 20 at a position equal to the lower end of the outer casing 10, and directional pads 40 are evenly distributed on the outer wall of the inner casing 20, and the directional pads 40 are movably pressed against the inner wall of the outer casing 10. The directional pads 40 evenly distributed on the outer wall of the inner casing 20 are used to support the thin inner casing 20, and the retaining ring 30 is used to prevent concrete from entering the gap between the outer casing 10 and the inner casing 20, thereby, there is no need to backfill clay, and it is easier to pull out the outer casing 10, simplifying the operation.

[0030] See also Figure 1-Figure 4 The retaining ring 30 includes an anti-spoiler plate 31, which is welded to the outer circle of the inner casing 20. The anti-spoiler plate 31 is made of a steel plate with a thickness of 0.5 cm, and is installed in a circle on the inner casing 20 at the same height as the outer casing 10 to block the concrete.

[0031] See also Figure 1-Figure 4 The spoiler plate 31 is conical. The conical setting facilitates the insertion of the inner tube into the outer tube, and is also conducive to the fit of the spoiler plate 31 with the inner wall of the outer casing 10, so as to better block the concrete.

[0032] See also Figure 1-Figure 4The retaining ring 30 also includes a flexible anti-spoiler pad 32, which is installed above the anti-spoiler plate 31. The anti-spoiler pad 32 is a compressible flexible material, which is installed and fixed above the anti-spoiler plate 31, and fits more closely with the inner wall of the outer casing 10 to isolate the concrete.

[0033] See also Figure 1-Figure 4 There are 4 directional pads 40 in a circular array on each plane. Four directional pads 40 are arranged on one plane, and the spacing between each layer can be arranged according to 2m to 3m, which plays a role in positioning the inner casing 20.

[0034] See also Figure 1-Figure 4 The directional pad 40 includes a welding portion and an outer package portion, and the outer package portion is welded to the inner casing 20 through the welding portion. The welding portion is a steel bar, the steel bar is welded to the inner casing 20, and concrete is wrapped on the steel bar to form the outer package portion, which has stronger supporting force and is conducive to reducing costs.

[0035] See also Figure 1-Figure 4 The inner casing 20 is longer than the outer casing 10. The inner casing 20 is made of ordinary steel, and its length is preferably 1.5m to 2m longer than the outer casing 10, and its thickness can generally be 0.5cm, as a protective device when pouring concrete.

[0036] The working principle of the underwater pile foundation steel casing recovery device is as follows: before drilling the underwater pile foundation, an outer casing 10 is set, the outer casing 10 is made of steel, and the length is calculated according to the on-site geology, water depth and other conditions, the diameter is preferably the pile diameter + 20cm, and the thickness is generally 1.5cm, as a protective measure during hole formation, after the hole is formed, an inner casing 20 is set, which is made of ordinary steel, and the length is preferably 1.5m to 2m longer than the outer casing 10, and the thickness can generally be 0.5cm. After the inner casing 20 is inserted, it is used as a protective device when pouring concrete, and then concrete is poured into the inner casing 20, and the lower end of the outer casing 10 An anti-spoiler plate 31 and a flexible anti-spoiler pad 32 are provided at the opening of the joint with the inner casing 20 to prevent concrete from entering the gap between the outer casing 10 and the inner casing 20. The directional pad 40 is used to support the inner casing 20. After the pile foundation construction is completed, the outer casing 10 can be pulled out for turnover. In summary, the directional pads 40 evenly distributed on the outer wall of the inner casing 20 are used to support the thin inner casing 20, and the retaining ring 30 is used to block concrete from entering the gap between the outer casing 10 and the inner casing 20. Therefore, there is no need to backfill clay, and it is easier to pull out the outer casing 10, which simplifies the operation.

[0037] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A device for recovering steel casing of underwater pile foundation, comprising an outer casing (10) and an inner casing (20), characterized in that: A retaining ring (30) is provided on the inner casing (20) at a position at the same height as the lower end of the outer casing (10), and directional pads (40) are evenly distributed on the outer wall of the inner casing (20), and the directional pads (40) are movably pressed against the inner wall of the outer casing (10).

2. The underwater pile foundation steel casing recovery device according to claim 1 is characterized in that: The retaining ring (30) comprises an anti-spoiler plate (31), and the anti-spoiler plate (31) is welded to the outer circumference of the inner casing (20).

3. The underwater pile foundation steel casing recovery device according to claim 2 is characterized in that: The anti-spoiler plate (31) is arranged in a conical shape.

4. The underwater pile foundation steel casing recovery device according to claim 3 is characterized in that: The retaining ring (30) further comprises a flexible anti-spoiler pad (32), and the anti-spoiler pad (32) is installed above the anti-spoiler plate (31).

5. The underwater pile foundation steel casing recovery device according to claim 4 is characterized in that: The directional spacers (40) are arranged in a circular array in four numbers on each plane.

6. The underwater pile foundation steel casing recovery device according to claim 5 is characterized in that: The directional pad (40) comprises a welding portion and an outer packaging portion, and the outer packaging portion is welded to the inner casing (20) via the welding portion.

7. The underwater pile foundation steel casing recovery device according to claim 6 is characterized in that: The inner casing (20) is longer than the outer casing (10).

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