Super-large-size karst pile foundation stabilizing structure

Abstract

The utility model discloses an ultra-large-size karst pile foundation stabilizing structure. The ultra-large-size karst pile foundation stabilizing structure comprises a pile body and a protective barrel. The protective barrel is arranged on the periphery of the pile body, and a limiting assembly for limiting the pile body is arranged in the protective barrel; the protective cylinders are sequentially connected in a sleeved mode from top to bottom, a limiting assembly is arranged in each protective cylinder, a positioning hole is formed in each protective cylinder, the positioning holes vertically extend, the positioning holes of every two adjacent protective cylinders are communicated in a vertically opposite mode, and positioning rods are inserted into the positioning holes in a penetrating mode. And the plurality of protective cylinders are connected in series and fixed together up and down through the positioning rods. According to the karst pile foundation protection device, the multiple protection barrels are arranged, the multiple protection barrels are vertically and sequentially connected in a sleeved mode, meanwhile, the positioning holes are formed, and the multiple protection barrels are vertically and serially connected and fixed together by inserting the positioning rods into the positioning holes, so that the structure is more stable, and the requirement of an ultra-large-size karst pile foundation for stability is completely met; and convenience is brought to construction operation.

Description

Technical Field

[0001] The utility model relates to the field of karst pile foundation technology, in particular to a stabilizing structure of a super-large volume karst pile foundation. 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 the protective cylinder and then driving the pile body.

[0003] With the continuous improvement of construction requirements, the current karst pile foundation is constantly expanding in area and depth, making the volume larger and larger. However, in the prior art, such as the karst pile foundation with casing disclosed in Chinese utility model patent CN 218027650 U, there is only one casing, which cannot meet the stability requirements of the super-large volume karst pile foundation. Therefore, it is necessary to study a solution to solve the above problem. Utility Model Content

[0004] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide a stabilizing structure for an ultra-large karst pile foundation, which can meet the stability requirements of an ultra-large karst pile foundation.

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

[0006] A stabilizing structure for an extra-large karst pile foundation comprises a pile body and a protective cylinder; the protective cylinder is arranged at the periphery of the pile body, and a limiting component for limiting the pile body is arranged inside the protective cylinder; the protective cylinder is a plurality of cylinders which are sequentially fitted and connected up and down, and a limiting component is arranged inside each protective cylinder, and a positioning hole is opened on each protective cylinder, the positioning hole extends vertically, and the positioning holes of two adjacent protective cylinders are vertically opposite and connected, and a positioning rod is inserted in the positioning hole, and the positioning rod connects and fixes the plurality of protective cylinders together in series up and down.

[0007] Preferably, two limit assemblies are provided for each protective cylinder, and the two limit assemblies are arranged radially symmetrically to each other.

[0008] Preferably, screw holes are formed inside and outside the protective cylinder to avoid penetration. The limiting assembly includes a limiting plate and a screw rod. The limiting plate is an arc-shaped plate and fits the outer side surface of the pile body. One end of the screw rod is rotatably connected to the outer side surface of the limiting plate, and the other end of the screw rod is threadedly connected to the screw hole and extends outward from the protective cylinder body.

[0009] 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.

[0010] Preferably, the protective cylinder is made of carbon fiber.

[0011] 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.

[0012] Preferably, the positioning holes are arranged in two groups in radial symmetry, and one of the positioning rods is inserted into each group of positioning holes.

[0013] 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:

[0014] By providing multiple protective cylinders, and fitting them together in sequence up and down, and providing positioning holes, and using positioning rods inserted in the positioning holes to connect and fix the multiple protective cylinders together in series up and down, the structure is more stable, fully meeting the stability requirements of ultra-large karst pile foundations, and bringing convenience to construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of a preferred embodiment of the utility model;

[0016] Figure 2 It is a cross-sectional view of a preferred embodiment of the utility model.

[0017] Description of the accompanying drawings:

[0018] 10. Pile body 20. Protective cylinder

[0019] 21. Positioning hole 22. Inner sleeve

[0020] 23. Outer sleeve joint 24. Screw hole

[0021] 25. Hook 30. Limiting assembly

[0022] 31. Limiting plate 32. Screw

[0023] 40. Positioning rod DETAILED DESCRIPTION

[0024] Please refer to Figure 1 to Figure 2 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a pile body 10 and a protective cylinder 20.

[0025] The protective cylinder 20 is arranged on the periphery of the pile body 10, and a limiting component 30 for limiting the pile body 10 is arranged inside the protective cylinder 20; the protective cylinder 20 is a plurality of protective cylinders 20 which are sequentially fitted and connected up and down, and a limiting component 30 is arranged inside each protective cylinder 20, and a positioning hole 21 is opened on each protective cylinder 20, and the positioning hole 21 extends vertically, and the positioning holes 21 of two adjacent protective cylinders 20 are vertically connected, and a positioning rod 40 is inserted in the positioning hole 21, and the positioning rod 40 connects and fixes the plurality of protective cylinders 20 in series up and down.

[0026] The protective cylinder 20 is made of carbon fiber, which is light in weight and has better structural strength. The lower end of the protective cylinder 20 has an inner fitting portion 22, and the upper end of the protective cylinder 20 has an outer fitting portion 23. The outer diameter of the outer fitting portion 23 is larger than the outer diameter of the inner fitting portion 22. The outer fitting portion 23 of the protective cylinder 20 located below is fitted onto the outside of the inner fitting portion 22 of the protective cylinder 20 located above to achieve the splicing of the two adjacent protective cylinders 20 above and below.

[0027] The protective cylinder 20 is formed with screw holes 24 inside and outside to prevent penetration. The limiting assembly 30 includes a limiting plate 31 and a screw rod 32. The limiting plate 31 is an arc-shaped plate and fits the outer side of the pile body 10. One end of the screw rod 32 is rotatably connected to the outer side of the limiting plate 31, and the other end of the screw rod 32 is screwed into the screw hole 24 and extends outward from the protective cylinder 20.

[0028] Two limiting assemblies 30 are provided for each protective cylinder 20 . The two limiting assemblies 30 are arranged radially symmetrically to each other so as to better limit the pile body 10 and ensure the verticality of the pile body 10 .

[0029] In addition, the inner wall of the protective cylinder 20 is provided with hooks 25 for lifting the protective cylinder 20 , and there are two hooks 25 arranged radially symmetrically to better lift the protective cylinder 20 .

[0030] In addition, the positioning holes 21 are arranged in two groups in radial symmetry, and one of the positioning rods 40 is inserted into each group of positioning holes 21, so that the multiple protective cylinders 20 are better fixed together.

[0031] During construction, multiple protective cylinders 20 are sleeved on the outer periphery of the pile body 10. Before the pile body 10 is driven in, the multiple protective cylinders 20 are buried first, and a positioning rod 40 is inserted in each group of positioning holes 21, so that the multiple protective cylinders 20 are better fixed together. The bottom of the pile body 10 stands vertically inside the multiple protective cylinders 20. The position of the limit plate 31 is adjusted by turning the screw rod 32 along the screw hole 24. The preparation work can be completed by clamping the pile body 10 from both sides to the surface of the pile body 10 through the limit plate 31. At this time, during the driving construction of the pile body 10, multiple protective cylinders 20 are used to prevent the sediment from flowing back during the construction process. The pile body 10 is limited by the cooperation of the limit plate 31, thereby ensuring the verticality of the pile body 10 during the driving construction process, reducing the influence of the karst landform environment on the construction stability of the pile body 10, and improving the construction accuracy of the pile body 10.

[0032] The design focus of the utility model is: by providing multiple protective cylinders, and cooperating with the multiple protective cylinders to be connected in sequence up and down, and providing positioning holes, and using positioning rods to be inserted into the positioning holes to connect the multiple protective cylinders in series and fix them together up and down, the structure is more stable, which fully meets the stability requirements of ultra-large volume karst pile foundations and brings convenience to construction operations.

[0033] 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 super-large volume karst pile foundation stabilizing structure, comprising a pile body and a protective cylinder; the protective cylinder is arranged at the periphery of the pile body, and a limiting component for limiting the pile body is arranged in the protective cylinder; the characteristics are: The protective cylinder body comprises a plurality of protective cylinder bodies which are fitted in sequence up and down, a limiting component is arranged in each protective cylinder body, a positioning hole is opened on each protective cylinder body, the positioning hole extends vertically, the positioning holes of two adjacent protective cylinder bodies are vertically opposite and connected, and a positioning rod is inserted in the positioning hole, which connects the plurality of protective cylinder bodies in series and fixes them together up and down.

2. The ultra-large volume karst pile foundation stabilizing structure according to claim 1, characterized in that: Two limit assemblies are arranged for each protective cylinder, and the two limit assemblies are arranged radially symmetrically to each other.

3. The ultra-large volume karst pile foundation stabilizing structure according to claim 1, characterized in that: The inside and outside of the protective cylinder are formed with screw holes to avoid penetration. The limiting assembly includes a limiting plate and a screw rod. The limiting plate is an arc-shaped plate and fits the outer side of the pile body. One end of the screw rod is rotatably connected to the outer side of the limiting plate, and the other end of the screw rod is screwed into the screw hole and extends outward from the protective cylinder body.

4. The ultra-large volume karst pile foundation stabilizing structure according to 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.

5. The ultra-large volume karst pile foundation stabilizing structure according to claim 1, characterized in that: The protective cylinder is made of carbon fiber.

6. The ultra-large volume karst pile foundation stabilizing structure according to 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.

7. The ultra-large volume karst pile foundation stabilizing structure according to claim 1, characterized in that: The positioning holes are arranged in two groups in radial symmetry, and one of the positioning rods is inserted into each group of positioning holes.

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