Hole collapse prevention device for oversized karst pile foundation construction

Abstract

The utility model discloses an oversized karst pile foundation construction anti-sloughing hole device which comprises a plurality of protective cylinders, the protective cylinders are sequentially connected in a sleeved mode from top to bottom, each protective cylinder comprises an inner layer and an outer layer, the inner layer is made of foaming materials, the outer layer completely wraps the inner layer, and the outer layer is made of carbon fiber materials. The product is formed by sequentially sleeving and connecting a plurality of protective barrels from top to bottom, each protective barrel comprises an inner layer and an outer layer, the inner layer is made of a foaming material, the outer layer completely covers the inner layer, and the outer layer is made of a carbon fiber material, so that the product is very light in overall weight, more convenient to put down and take out, higher in structural strength and better in service life. The method is very suitable for karst pile foundation construction in an oversized karst cave, and convenience is brought to construction operation.

Description

Technical Field

[0001] The utility model relates to the technology of karst pile field, in particular to a hole collapse prevention device for super-large karst pile foundation construction. Background Art

[0002] In recent years, with the densification and improvement of road networks, the geological conditions encountered during the construction of bridge pile foundations have become increasingly complex and diverse. The pile foundation construction of multi-layer beaded large cave piles in karst areas has always been the focus and difficulty of pile foundation construction in karst areas. The pile foundation construction of caves is unpredictable and dangerous, especially the pile foundation construction of string-like multi-layer caves. Compared with traditional pile foundation construction, more attention should be paid to the bearing capacity of the pile foundation to ensure the overall bearing capacity of the highway or bridge and avoid settlement problems in the later stage. Conventional karst area pile foundation construction usually adopts the method of lowering steel casing, digging guide holes with drilling rigs, and finally pouring concrete into piles for construction. The steel casing has the effect of preventing the hole from collapsing.

[0003] However, this kind of steel casing has average structural strength and is heavy. When used in a super large cave, the steel casing has a larger cross section and a deeper depth, which greatly increases the weight of the steel casing, making it very inconvenient to lower and remove. Therefore, it is necessary to study a solution to solve the above problem. Utility Model Content

[0004] In view of this, the utility model aims to address the deficiencies in the prior art, and its main purpose is to provide a device for preventing the collapse of super-large karst pile foundation construction, which can effectively solve the problem that the existing steel casing is heavy and inconvenient to be lowered and removed in super-large caves.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for preventing collapse of holes in super-large karst pile foundation construction includes a plurality of protective cylinders, which are sequentially sleeved and connected up and down, and each protective cylinder includes an inner layer and an outer layer, wherein the inner layer is made of foam material, and the outer layer completely covers the inner layer, and the outer layer is made of carbon fiber material.

[0007] Preferably, the lower end of the protective cylinder has an inner fitting portion, and the upper end of the protective cylinder has an outer fitting portion, the outer diameter of the outer fitting portion is larger than the outer diameter of the inner fitting portion, wherein the outer fitting portion of the protective cylinder located below fits outside the inner fitting portion of the protective cylinder located above.

[0008] Preferably, the inner wall of the protective cylinder is provided with hooks for lifting the protective cylinder, and there are two hooks arranged radially symmetrically, and the hooks are made of carbon fiber material.

[0009] Preferably, the outer wall of the protective cylinder is covered with a smooth layer.

[0010] Preferably, the cross-section of the protective cylinder is circular.

[0011] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0012] This product consists of multiple protective cylinders that are connected in sequence up and down, and each protective cylinder includes an inner layer and an outer layer. The inner layer is made of foam material, and the outer layer completely covers the inner layer. The outer layer is made of carbon fiber material, which makes the overall weight of this product very light, easier to lower and take out, and has stronger structural strength. It is very suitable for karst pile foundation construction in super-large caves, bringing convenience to construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of a preferred embodiment of the utility model.

[0014] Description of the accompanying drawings:

[0015] 10. Protective cylinder 11. Inner layer

[0016] 12. Outer layer 13. Smooth layer

[0017] 101, inner sleeve joint 102, outer sleeve joint

[0018] 103. Hook DETAILED DESCRIPTION

[0019] Please refer to Figure 1 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a plurality of protective cylinders 10.

[0020] The plurality of protective cylinders 10 are connected in sequence by being sleeved up and down, and each protective cylinder 10 includes an inner layer 11 and an outer layer 12 . The inner layer 11 is made of foam material, and the outer layer 12 completely covers the inner layer 11 . The outer layer 12 is made of carbon fiber material.

[0021] In this embodiment, the cross section of the protective cylinder 10 is circular so as to be installed in accordance with the external hole. The lower end of the protective cylinder 10 has an inner fitting portion 101, and the upper end of the protective cylinder 10 has an outer fitting portion 102. The outer diameter of the outer fitting portion 102 is larger than the outer diameter of the inner fitting portion 101. The outer fitting portion 102 of the protective cylinder 10 located at the bottom is fitted outside the inner fitting portion 101 of the protective cylinder 10 located at the top, so that the upper and lower protective cylinders 10 are firmly fitted and connected; and the inner wall of the protective cylinder 10 is provided with hooks 103 for lifting the protective cylinder 10. The hooks 103 are two radially symmetrically arranged. The hooks 103 are made of carbon fiber and have good structural strength, so as to install and remove the protective cylinder 10. In addition, the outer wall of the protective cylinder 10 is covered with a smooth layer 13 so as to slide with the outside for easy installation and removal.

[0022] When in use, multiple protective cylinders 10 are lowered into the cave one by one, and are connected up and down in sequence. Then, karst pile foundation construction is carried out in the multiple protective cylinders 10. After the construction is completed, the multiple protective cylinders 10 can be lifted out of the cave in sequence for reuse.

[0023] The design focus of the utility model is: the product is composed of a plurality of protective cylinders which are sequentially fitted and connected up and down, and each protective cylinder includes an inner layer and an outer layer, the inner layer is a foam material, and the outer layer completely covers the inner layer, and the outer layer is a carbon fiber material, so that the overall weight of the product is very light, and it is more convenient to lower and take out, and the structural strength is also stronger, which is very suitable for karst pile foundation construction in super-large caves, bringing convenience to construction operations.

[0024] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A device for preventing the collapse of a super-large karst pile foundation, characterized in that: It includes a plurality of protective cylinders, which are sequentially connected up and down, and each protective cylinder includes an inner layer and an outer layer, the inner layer is made of foam material, and the outer layer completely covers the inner layer, and the outer layer is made of carbon fiber material.

2. The device for preventing the collapse of a super-large karst pile foundation as claimed in claim 1, characterized in that: The lower end of the protective cylinder has an inner fitting portion, and the upper end of the protective cylinder has an outer fitting portion, the outer diameter of the outer fitting portion is larger than the outer diameter of the inner fitting portion, wherein the outer fitting portion of the protective cylinder located below fits outside the inner fitting portion of the protective cylinder located above.

3. The device for preventing the collapse of a super-large karst pile foundation as claimed in claim 1, characterized in that: The inner wall of the protective cylinder is provided with hooks for lifting the protective cylinder, and two hooks are radially symmetrically arranged and made of carbon fiber material.

4. The device for preventing the collapse of a super-large karst pile foundation according to claim 1, characterized in that: The outer wall of the protective cylinder is covered with a smooth layer.

5. The device for preventing the collapse of a super-large karst pile foundation according to claim 1, characterized in that: The cross section of the protective cylinder is circular.

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