Reusable device for deepwater cast-in-situ bored pile steel casing

Abstract

The invention relates to the technical field of steel casing construction, in particular to a deepwater cast-in-situ bored pile steel casing reusable device which comprises a steel casing and two fixing structures, the steel casing comprises two semi-cylinder bodies and four semi-circle flanges, and one semi-circle flange is fixed to each of the two ends of each semi-cylinder body; the two semicircular cylinder bodies are buckled and connected to form a cylinder; the two fixing structures are arranged at the two ends of the steel casing correspondingly, each fixing structure comprises a steel pipe and a flange ring, each flange ring is perpendicularly connected with one end of the corresponding steel pipe, and the two semi-circle flanges at the same ends of the two semi-circular cylinders are connected with the flange rings through bolts; wherein the inner diameter of the steel pipe is the same as that of the steel casing. The device has the advantages of being convenient to assemble and disassemble, convenient to transport, capable of being repeatedly used and capable of saving resources.

Description

Technical Field

[0001] The invention relates to the technical field of steel casing construction, in particular to a device for reusing a steel casing of a deep-water bored pile. Background Art

[0002] Steel casing can provide a closed environment for pile foundation drilling in pile foundation construction, block mud and ensure the water level in the hole; as a permanent structure, steel casing can prevent corrosion and erosion; it can maintain a static working environment in deep water, especially in the water flow environment affected by tides. Therefore, steel casing is widely used in the construction process of deep water areas with unstable soil and inland rivers, lakes and other areas in my country. There is a certain functional duplication between the steel casing of deepwater cast-in-place concrete foundation and the concrete pile foundation, which leads to high project cost. At the same time, steel casing in the water environment often rusts and corrodes, causing water environment pollution and other problems. With the increase of steel casing engineering volume (depth, diameter), the mechanical equipment and construction platform required for the installation and removal of steel casing also need to be strengthened, which makes the installation and removal construction more difficult and the cost increased.

[0003] In order to save construction costs, construction companies use various technical methods to recycle steel casings for reuse. The types of recyclable steel casings currently used include double casing recycling, outer casing recycling, inner and outer casing recycling, and recycling steel casing using special templates for pile foundations. Although these types of steel casings can recycle casings, they also have many disadvantages. For example, when the casing of the double casing method is long, it must be cut, and effective welding must be performed when it is used next time, otherwise it will affect the quality of concrete pouring, and there is also the situation that the casing cannot be pulled out; because the inner casing cannot be recycled, the outer casing recycling generally uses a thinner wall casing, which has deformation and tearing failures. As the depth of the casing deepens, the recycling capacity is lower, and the scope of application is limited; in the process of pulling out the casing by recycling the inner and outer casings, there are problems such as the concrete surface dropping and the pile body being sandwiched with mud. As the depth of the casing deepens, the recycling capacity is lower, and the scope of application is limited. It can be seen that in the actual construction process, there are disadvantages such as difficulty in effective recycling, low turnover rate, difficulty in installation, and limited scope of use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a reusable device for a deep-water bored pile steel casing, which is easy to disassemble and can be reused.

[0005] The technical solution of the present invention includes a steel casing and two fixed structures. The steel casing includes two semi-cylindrical bodies and four half-circle flanges. A half-circle flange is fixed at each end of each semi-cylindrical body, and the two semi-cylindrical bodies are snap-fitted and connected to form a cylindrical tube; two fixed structures are respectively arranged at the two ends of the steel casing, and the fixed structures include a steel pipe and a flange ring. The flange ring is vertically connected to one end of the steel pipe, and the two half-circle flanges at the same end of the two semi-cylindrical bodies are connected to the flange ring by bolts, wherein the inner diameter of the steel pipe is the same as the inner diameter of the steel casing.

[0006] Furthermore, a connecting plate is fixed on each of the two side edges of the semi-cylinder, and the connecting plates corresponding to the two semi-cylinders are connected by bolts.

[0007] Furthermore, there are multiple steel casings, and the half-circle flanges of two adjacent steel casings are connected by bolts.

[0008] Furthermore, sealing gaskets are provided between the two connecting plates connected by bolts, between the two half-circle flanges, and between the half-circle flanges and the flange ring.

[0009] Furthermore, the outer walls of the two semi-cylinders are each provided with a plurality of strip-shaped reinforcing ribs, and the strip-shaped reinforcing ribs are arranged on the outer walls of the semi-cylinders in a horizontal or vertical direction or in a horizontally and vertically cross manner.

[0010] Furthermore, the plurality of strip-shaped reinforcing ribs are arranged at equal intervals.

[0011] Furthermore, a plurality of triangular plate reinforcement ribs are provided at the connection between the steel pipe and the flange ring.

[0012] Furthermore, the plurality of triangular plate reinforcement ribs are arranged at equal intervals.

[0013] Furthermore, the inner wall of each semi-cylinder is coated with a release agent.

[0014] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0015] The two semi-cylinders of the present invention are detachably connected to form a steel casing and a fixed structure. When disassembly is required, the two semi-cylinders are separated from the fixed structure by removing the bolts, leaving the fixed structure on the concrete to avoid cutting. At the same time, the fixed structure plays a role in protecting the cement column, and has the advantages of convenient installation and disassembly, reuse, and resource saving.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The overall structure of the casing of one embodiment of the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 The overall structure of the casing of one embodiment of the present invention is shown in FIG. Figure 2 .

[0020] Notes:

[0021] 1. Steel casing; 11. Semi-cylinder; 12. Connecting plate; 13. Third connecting hole; 14. Half-circle flange; 15. First connecting hole; 16. Strip reinforcement ribs; 2. Fixed structure; 21. Steel pipe; 22. Flange ring; 23. Second connecting hole; 24. Triangular plate reinforcement ribs. DETAILED DESCRIPTION

[0022] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0023] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the embodiments of the present invention, unless otherwise specified, “plurality” means two or more.

[0025] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0026] like Figure 1 As shown, the present invention provides a reusable device for deep-water bored pile steel casing, comprising: a steel casing 1, comprising two arc-shaped templates, the arc-shaped template comprising a semi-cylinder 11, two connecting plates 12 and two semi-circular flanges 14; the two semi-cylinders 11 are identical and form a cylinder, the two connecting plates 12 are respectively vertically arranged on the two sides of the semi-cylinder 11, the two semi-circular flanges 14 are respectively vertically arranged on the two arc edges of the semi-cylinder 11, the two connecting plates 12 are each provided with a plurality of third connecting holes 13, the two semi-circular flanges 14 are each provided with a plurality of first connecting holes 15, and the bolts connect the two semi-cylinders 11 through the plurality of third connecting holes 13 on the connecting plates 12, that is, the connecting plates 12 corresponding to the two semi-cylinders 11 are connected by bolts. .

[0027] Two fixing structures 2 are respectively arranged at both ends of the steel casing 1. The fixing structure 2 includes a steel pipe 21 and a flange ring 22 vertically connected to one end of the steel pipe 21. The flange ring 22 is provided with a plurality of second connecting holes 23. The positions of the second connecting holes 23 correspond one-to-one to the positions of the first connecting holes 15. Bolts connect the fixing structure 2 to the steel casing 1 through the first connecting holes 15 and the second connecting holes 23.

[0028] The inner diameter of the steel pipe 21 is the same as the inner diameter of the steel casing, and the first connecting hole 15 and the second connecting hole 23 are the same in size and shape.

[0029] It can be understood that when the present invention uses two semi-cylinders to be detachably connected by bolts, it is more convenient when dismantling is required and no cutting is required.

[0030] It can be understood that when the inner diameter of the steel pipe and the inner diameter of the steel casing are the same, it is ensured that the concrete structure is consistent from top to bottom during pouring.

[0031] In the embodiment of the present invention, the plurality of third connection holes 13 , the plurality of first connection holes 15 , and the plurality of second connection holes 23 are all arranged at equal intervals.

[0032] It can be understood that there is no need to deliberately find the connection position when connecting.

[0033] In the embodiment of the present invention, a plurality of strip-shaped reinforcing ribs 16 are disposed on the outer wall of the semi-cylindrical body 11 ; the strip-shaped reinforcing ribs 16 are disposed on the outer wall of the semi-cylindrical body 11 in a horizontal or vertical direction or in a horizontally and vertically crossed manner.

[0034] It can be understood that the purpose of adding strip reinforcement ribs is to avoid deformation and tearing, because as the length of the steel casing increases, the steel casing at the bottom needs to withstand more pressure.

[0035] In the embodiment of the present invention, the plurality of strip-shaped reinforcing ribs 16 are arranged at equal intervals.

[0036] It can be understood that the equal spacing arrangement can make the semi-cylinder body bear the force evenly.

[0037] In the embodiment of the present invention, a plurality of triangular plate reinforcing ribs 24 are provided at the connection between the steel pipe 21 and the flange ring 22 .

[0038] It can be understood that the purpose of adding triangle plate reinforcement is to increase the strength of the connection and fix the steel pipe. If the triangle plate reinforcement is not added, the steel pipe and the flange ring may not be perpendicular during operation, which may cause the concrete to no longer be straight.

[0039] In the embodiment of the present invention, a plurality of triangular plate reinforcement ribs 24 are arranged at equal intervals.

[0040] It can be understood that this is to ensure uniform stress on all sides of the steel pipe.

[0041] like Figure 2 As shown, in the embodiment of the present invention, there are multiple steel casings 1, and the half-circle flanges 14 of two adjacent steel casings 1 are connected by bolts. That is, the bolts connect the multiple steel casings 1 in sequence through the multiple first connection holes 15 on the half-circle flanges 14 on each two adjacent steel casings 1.

[0042] It can be understood that different numbers of steel casings can be set to meet different depth requirements.

[0043] In the embodiment of the present invention, sealing gaskets are provided between the two connecting plates 12 connected by bolts, between the two half-circle flanges 14 , and between the half-circle flange 14 and the flange ring 22 .

[0044] It is understandable that the unevenness of the connecting plate and the connection through bolts will cause gaps in the connection. In order to prevent the concrete from flowing out of the connection when pouring concrete and to prevent river water from entering after pouring, a sealing pad is provided at the connection for sealing.

[0045] In the embodiment of the present invention, a release agent is coated on the inner wall of each semi-cylinder 11 so as to separate the semi-cylinder 11 from the concrete.

[0046] It is understandable that after pouring concrete, the concrete will adhere to the inner wall of the steel casing. If the two are forcibly separated, the semi-cylindrical body of the steel casing will be deformed or the concrete structure will be damaged. Applying a release agent can facilitate the separation of the semi-cylindrical body and the concrete structure when disassembling the steel casing.

[0047] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0048] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A deep-water bored pile steel casing reusable device, characterized in that: include: The steel casing (1) comprises two semi-cylindrical bodies (11) and four semi-circular flanges (14), one semi-circular flange (14) being fixed at each end of each semi-cylindrical body (11), and the two semi-cylindrical bodies (11) are buckled and connected to form a cylindrical tube; Two fixing structures (2) are respectively arranged at two ends of the steel casing (1), the fixing structure (2) comprises a steel pipe (21) and a flange ring (22), the flange ring (22) is vertically connected to one end of the steel pipe (21), and the two half-circle flanges (14) at the same end of the two semi-cylinders (11) are connected to the flange ring (22) by bolts; The inner diameter of the steel pipe (21) is the same as the inner diameter of the steel casing.

2. A deep-water bored pile steel casing reusable device as claimed in claim 1, characterized in that: A connecting plate (12) is fixed to each of the two side edges of the semi-cylindrical body (11), and the connecting plates (12) corresponding to the two semi-cylindrical bodies (11) are connected by bolts.

3. A deep-water bored pile steel casing reusable device as claimed in claim 2, characterized in that: There are multiple steel casings (1), and the half-circle flanges (14) of two adjacent steel casings (1) are connected by bolts.

4. A deep-water bored pile steel casing reusable device as claimed in claim 3, characterized in that: Sealing gaskets are provided between the two connecting plates (12) connected by bolts, between the two half-circle flanges (14), and between the half-circle flanges (14) and the flange ring (22).

5. The deep-water bored pile steel casing reusable device as claimed in claim 1, characterized in that: The outer walls of the two semi-cylindrical bodies (11) are each provided with a plurality of strip-shaped reinforcing ribs (16); The strip-shaped reinforcing ribs (16) are arranged on the outer wall of the semi-cylindrical body (11) in a horizontal or vertical direction or in a horizontal and vertical cross direction.

6. A deep-water bored pile steel casing reusable device as claimed in claim 5, characterized in that: The plurality of strip-shaped reinforcing ribs (16) are arranged at equal intervals.

7. A deep-water bored pile steel casing reusable device as claimed in claim 1, characterized in that: A plurality of triangular plate reinforcing ribs (24) are provided at the connection between the steel pipe (21) and the flange ring (22).

8. A deep-water bored pile steel casing reusable device as claimed in claim 7, characterized in that: The plurality of triangular plate reinforcing ribs (24) are arranged at equal intervals.

9. A deep-water bored pile steel casing recyclable device as claimed in any one of claims 1 to 8, characterized in that: The inner wall of each semi-cylindrical body (11) is coated with a release agent.

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