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Fiber composite pile for marine environment and preparation method of fiber composite pile

A technology of fiber composite and marine environment, applied in the field of pile foundation structure, can solve the problems affecting the mechanical properties of the structure, achieve good corrosion resistance effect, reduce load, and prevent freeze-thaw cycle damage

Pending Publication Date: 2018-04-13
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main methods to improve the durability of pile foundations of cross-sea bridges are: ① Use high-performance concrete and add high-quality admixtures; ② Reasonable protective layer for steel bars. The thicker the protective layer, the longer the distance for chloride ions to diffuse to the steel bars, but Affect the mechanical properties of the structure; ③Spray epoxy coating on the surface of the steel bar to isolate chloride ions

Method used

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  • Fiber composite pile for marine environment and preparation method of fiber composite pile
  • Fiber composite pile for marine environment and preparation method of fiber composite pile
  • Fiber composite pile for marine environment and preparation method of fiber composite pile

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A kind of preparation of square fiber composite pile, comprises the following steps:

[0042] Step 1: Make a fiber composite pile template with a pile body length of 19.3m, a pile tip length of 0.7m, and a pile body cross-section of a square with a side length of 0.45m;

[0043] Step 2: First make the FRP reinforcement cage: use 8 FRP reinforcements with a diameter of 20mm as the reinforcements of the pile body, and tie them on the 8 FRP reinforcements and the 4 FRP reinforcements in the middle of the composite pile facade in turn FRP stirrups with a diameter of 6-10mm, such as figure 2 As shown, the FRP reinforcement cage of the pile body is made; FRP stirrups with a diameter of 6 mm are bound on 8 FRP reinforcements with a diameter of 16 mm to make a FRP reinforcement cage at the pile tip; Reinforcement bars are vertically intersected at the top of the pile to form an FRP reinforcement cage at the top of the pile, such as Figure 3-4 As shown, the distance between ...

Embodiment 2

[0053] A kind of preparation of circular fiber composite post, comprises the following steps:

[0054] Step 1: Make a circular fiber composite pile template with a pile body length of 19.3m, a pile tip length of 0.7m, and a pile body cross-section with a diameter of 0.6m;

[0055] Step 2: First make the FRP cage: as Figure 5 As shown, FRP stirrups with a diameter of 6 to 10 mm are bound on eight FRP tendons with a diameter of 22 mm to make a pile body FRP cage; eight FRP tendons with a diameter of 16 mm are bound with a diameter of 6 mm FRP stirrups made of pile tip FRP cages;

[0056] The diameter of the FRP stirrup bound on the 560mm-long part of the upper end of the FRP stress tendon of the FRP cage of the pile body is 10mm, and the spacing is 70mm. Then the diameter of the FRP stirrup bound on the 16800mm long FRP stress bar is 8mm, and the spacing is 200mm; The diameter of the FRP stirrup is 6mm, and the spacing is 50mm;

[0057] Then set a 50mm concrete protective l...

Embodiment 3

[0065] A kind of preparation of annular fiber composite pile, comprises the following steps:

[0066] Step 1: Make a fiber composite pile template with a pile length of 19.3m, a pile tip length of 0.7m, and a ring-shaped cross-section of the pile body, in which the diameter of the outer ring is 0.6m and the diameter of the inner ring is 0.3m;

[0067] Step 2: First make the FRP cage: as Figure 6 As shown, FRP stirrups with a diameter of 6-10 mm are bound on eight FRP tendons with a diameter of 25 mm to make a FRP cage for the pile body; FRP stirrups made of pile tip FRP cages;

[0068] The diameter of the FRP stirrup bound on the 560mm-long part of the upper end of the FRP stress tendon of the FRP cage of the pile body is 10mm, and the spacing is 70mm. Then the diameter of the FRP stirrup bound on the 16800mm long FRP stress bar is 8mm, and the spacing is 200mm; The diameter of the FRP stirrup is 6mm, and the spacing is 50mm;

[0069] Then set a 50mm concrete protective l...

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Abstract

The invention relates to a pile foundation structure in oceanographic engineering, in particular to a fiber composite pile for the marine environment and a preparation method of the fiber composite pile. The composite pile comprises a pile body and a pile tip, and an FRP reinforcement cage is arranged in the composite pile and comprises a pile body FRP reinforcement cage and a pile tip FRP reinforcement cage. Two layers of FRP cloth are bonded on a flashing area, and the FRP cloth and the longitudinal axis of the pile body form an angle ranges from 0 degree to 90 degrees. The invention furtherprovides a fiber composite pile preparation method for the marine environment. The method comprises the steps that firstly, a fiber composite pile formwork is manufactured, and the FRP reinforcementcage is strapped; then concrete pouring and maintaining are carried out; the flashing area is ground and coated with bottom layer resin, leveling is carried out, and saturating resin smearing is carried out; and the FRP cloth is coated with bonding resin, and finally the FRP cloth is pasted. The fiber composite pile has the beneficial effects of being good in malleability, high in durable performance, low in self weight and the like, and can be applied to bridges and port engineering.

Description

technical field [0001] The invention relates to a pile foundation structure in marine engineering, in particular to a fiber composite pile used in marine environment and a preparation method thereof. technical background [0002] With the rapid development of our country's economy, our country has successively built a number of cross-sea bridges, which have far-reaching significance for the local economic and social development. However, in the marine environment, the cracks in concrete and the corrosion of steel bars caused by corrosion will pose a huge threat to the safety of the structure. Seawater contains a large amount of chloride salts, and chloride ions are the main cause of corrosion of steel bars in reinforced concrete structures. At the same time, the carbonization of concrete will also cause the corrosion of steel bars. Concrete is made by mixing cement and coarse aggregate. In the marine environment, concrete is damaged by freeze-thaw cycles, which will cause ...

Claims

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Application Information

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IPC IPC(8): E02D5/30E02D5/72B28B23/06
CPCE02D5/30E02D5/72B28B23/06
Inventor 张建伟李荣翔冯志芬徐宁温森赫中营
Owner HENAN UNIVERSITY
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