Reservoir area bridge pile foundation scouring protection method and composite protection structure

A composite protective structure and pile foundation technology, which is applied in the direction of foundation structure engineering, foundation structure repair, sheet pile wall, etc., can solve the problems such as the serious impact on the safety of bridges and potential safety hazards, and achieve no need for maintenance time and improve the durability of the structure sex, good energy dissipation effect

Pending Publication Date: 2021-03-26
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Through the inspection of the wading foundation of the Yangtze River Bridge in the main urban area of ​​Chongqing, it was found that there are different degrees of safety hazards affected by the erosion of the foundation of the bridge in service. The normal water storage of the Three Gorges Project of 175m has a particularly serious impact on the safety of bridges built in the early stage

Method used

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  • Reservoir area bridge pile foundation scouring protection method and composite protection structure
  • Reservoir area bridge pile foundation scouring protection method and composite protection structure
  • Reservoir area bridge pile foundation scouring protection method and composite protection structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] See figure 1 When the pile foundation is blocked, the pile foundation is surrounded by a complex three-dimensional water flow structure, including the front decline in jet, the pier swirl system and the bridge, resulting in a local flushing pit to form a partial flushing in the pile base 3. . When describing the flushing pit 1 morphology, the pile foundation 3 and the bed sand contact line are recorded as a flush pit depth boundary. The scope of flushing pits on the horizontal surface is recorded as the outer boundary of the pit. The distance between the depth boundary of the flush pit to the riverbed surface 2 is a flushing depth.

[0043] See image 3 In this embodiment, a reservoir area bridge pile foundation is provided, including the following steps:

[0044] 1) The water in the river in the reservoir area, extracts the water in the flushing pit, and removes loose mud stone in the flushing pit 1.

[0045] 2) Trust the inner wall of the flush pit. The boundary of the r...

Embodiment 2

[0062]This embodiment provides a reservoir area bridge pile foundation brush protection method, including the following steps:

[0063] 1) In the drying period of the river in the reservoir area, the water is pumped in the rumored pit, and the outer contour of the brush pit will be adjacent to the side wall of the riverbed surface 2, and the trim is 0.2 ~ 0.5 times the brush depth, and Clear the loose mud stone in the side of the flush pit and the bottom.

[0064] 2) Deflection, loose, honeycomb, corrosion, etc. to remove concrete, expose the concrete structure layer, and repair the surface with the repair material.

[0065] 3) Formation of the underglast, uniformly coated the primer to the surface of the pile foundation 3 that is about to stick to the FRP material 4, and the surface of the surface fingers refers to drying.

[0066] 4) Formulate the finding glue, the surface depression of the pile foundation is filled with flatness, no angular angular, and the surface finger is fo...

Embodiment 3

[0073] See Figure 4 This example discloses a library zone bridge pile base composite protector using the method described in Example 1, including FRP material 4 and grouting protective layer 6.

[0074] The FRP material 4 is attached to the sidewall of the pile foundation at the constant water level surface.

[0075] The grouting protective layer 6 is filled in the flushing pit 1. The grouting protective layer 6 includes a stone protective layer 602 and a gravel protective layer 601 from top to bottom. The median particle diameter of the stone material in the stone protective layer 602 is not less than 0.3 times the thickness of the stone protective layer 602.

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Abstract

The invention provides a reservoir area bridge pile foundation scouring protection method and a composite protection structure. The protection method includes the steps of water pumping, FRP materialpasting, grouting pipe laying, stone layer filling, grouting and the like. The composite protection structure comprises an FRP material and a grouting protection layer. The FRP material is adhered tothe side wall, positioned below the water surface of a normal water level, of a pile foundation; the grouting protection layer is filled in a scouring pit; and the grouting protection layer sequentially comprises a stone protective layer and a broken stone protective layer from top to bottom. A composite protection structure foundation adopts high polymer grouting, and compared with traditional cement grouting, the composite protection structure foundation belongs to flexible protection, has good stability and durability, and can keep good elasticity for a long time to buffer water flow scouring energy.

Description

Technical field [0001] The present invention relates to the field of civilian water conservancy engineering, and in particular, to a reservoir area bridge pile foundation flush protection method and a composite protection structure. Background technique [0002] The flush is one of the important factors that cause the damage of bridge pile foundation. Bridge pile foundations are generally in a very complex water environment. On the one hand, the brushing action is etched in the abutment of the pile foundation to form a flushing pit. On the other hand, the corrosion of the corroded pile, which seriously threatens the safety and reliability of the bridge to service, it is very important. Realistic meaning. [0003] Through the investigation of the water-related basis of the Yangtze River Bridge in Chongqing, it was found that there were different levels of safety hazards in the influence of the basic brush of the servant bridge. Due to the three bridge safety effects of the Three G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/64E02D31/00E02D31/06E02D37/00
CPCE02D5/64E02D31/00E02D31/06E02D37/00
Inventor 周航丁选明殷峰吴岱峰肖治微曹佰杨龙茜刘冒佚汪志强陈胜利郑袁林
Owner CHONGQING UNIV
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