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FRP membrane shell for reinforcing bridge pier and pile foundation and underwater structure reinforcing construction method

A technology of underwater structure and construction method, which is applied in the direction of basic structure engineering, bridge reinforcement, and basic structure repair, etc. It can solve problems such as endangering the safety of use, difficult to find, and damage, and achieve the effect of improving bearing capacity and easy forming

Inactive Publication Date: 2020-09-18
南京开博锐工程技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increase of operating time and increasing traffic volume, the underwater structure of the bridge is subject to river water erosion, scour, wear, cavitation, freeze-thaw and erosion in severe cold regions, ship collision, ice floes and earthquake attacks, environmental loads (such as biological Attachment) and working load, etc., easily lead to various damage defects, and are not easy to be found
The survey found that under the condition that the superstructure can basically meet the requirements of use, many underwater piers and piles of bridges will have various degrees of concrete surface peeling, honeycomb, cracks, exposed ribs, and hollowing out. These damages and defects will lead to The reduction of the bearing capacity and durability of the bridge seriously endangers the safety of use

Method used

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  • FRP membrane shell for reinforcing bridge pier and pile foundation and underwater structure reinforcing construction method
  • FRP membrane shell for reinforcing bridge pier and pile foundation and underwater structure reinforcing construction method
  • FRP membrane shell for reinforcing bridge pier and pile foundation and underwater structure reinforcing construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The FRP membrane shell of this implementation is as follows figure 1 As shown, it is a cylindrical structure composed of several prefabricated FRP segments 1 spliced ​​by connecting buckles 6 on aluminum alloy hoops 5 at the edges of the segments. Resin in fiber cloth and mesh.

[0036] Structures at Connected Nodes figure 2 As shown, the bolts 4 are arranged on the edge of the FRP segment to sequentially connect the outer reinforcement plate 51, the inner reinforcement plate 52 and the inserting plate 53. When the connecting buckle 6 connects the adjacent segment from the outside, the inserting plate 53 is provided internally. Guidance and restraint. The structure of the quick connect buckle 6 is as follows image 3 As shown, direct purchase of existing clamp hasp / self-locking latch.

[0037] Such as Figure 4 As shown, the limit device includes a steel hoop 7 and a limit steel bar 8. The hoop 7 can be a Huff structure connected by bolts 4, or a buckle connection...

Embodiment 2

[0040] The FRP membrane shell of this implementation is as follows figure 1 and figure 2 As shown, it includes several semicircular FRP segments 1, with embedded metal interlayers on the edge of the FRP segments, and arranges longitudinal bolt holes and circumferential bolt holes that run through the FRP segments and metal interlayers; a pair of semicircular The FRP segment is connected end to end through the longitudinal connecting plate 2 to form an annular reinforced shell, and the bottom and top of several annular reinforced shells are fixedly connected and extended through the annular connecting plate 2;

[0041] There are two groups of longitudinal connection holes on the longitudinal connection plate 2, and each group of longitudinal connection holes corresponds to a longitudinal bolt hole on a semicircular FRP segment;

[0042] There are two sets of circumferential connecting holes on the circumferential connecting plate 3 , and each set of circumferential connecting...

Embodiment 3

[0046] The FRP membrane shell is made of mesh and fiber cloth. The type of fiber cloth can be glass fiber, carbon fiber or basalt fiber, etc. Taking basalt fiber cloth as an example, the tensile strength of basalt fiber cloth is 2300MPa, the modulus of elasticity is 80GPa, and the elongation is 2.7%. Define a section of BFRP membrane shell as a unit, the diameter can be designed according to the needs, and it is made of BFRP cloth and epoxy resin. The skeleton inside the membrane shell adopts BFRP fiber mesh. Bolt connection is used in the longitudinal direction. In order to avoid damage to the BFRP where the bolts are tightened, local reinforcement is required. During the manufacturing process of the membrane shell, a stainless steel sheet of the same size as the external metal plate is pre-embedded at the joint where it is required (the membrane shell is embedded in the membrane shell. Stainless steel interlayer), and the external metal plate and stainless steel sheet are p...

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Abstract

The invention provides an FRP (fiber reinforced plastic) membrane shell for reinforcing bridge piers and pile foundations. The FRP membrane shell is of a cylindrical structure formed by splicing a plurality of prefabricated FRP pipe pieces through quick connecting hasps at the edges of the pipe pieces, and each FRP pipe piece is provided with a fiber cloth outer layer, a grid middle layer and resin filled in the fiber cloth and grids. The membrane shell is applied to underwater structure reinforcing construction, wherein the FRP membrane shell is assembled above the water surface through the quick connecting hasps, sinks to surround underwater piers and pile foundations and is filled with concrete. By means of the advantages of light weight, corrosion resistance, easiness in forming and the like of the FRP, the FRP is applied to underwater structure reinforcement, so that the pier and pile foundation reinforcement construction efficiency is improved, and the bearing capacity, the anti-seismic property and the durability of the pier are also enhanced.

Description

technical field [0001] The invention relates to an underwater reinforcement structure and a reinforcement method, in particular to an FRP membrane shell used for strengthening bridge piers and pile foundations, and a construction method of an underwater structure reinforced with the FRP membrane shell. Background technique [0002] With the increase of operating time and increasing traffic volume, the underwater structure of the bridge is subject to river water erosion, scour, wear, cavitation, freeze-thaw and erosion in severe cold regions, ship collision, ice floes and earthquake attacks, environmental loads (such as biological Attachment) and working loads, etc., easily lead to various damage defects, and are not easy to be found. The survey found that under the condition that the superstructure can basically meet the requirements of use, many underwater piers and piles of bridges will have various degrees of concrete surface peeling, honeycomb, cracks, exposed ribs, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E02D37/00E02D27/52E02D5/64E02D5/60
CPCE01D22/00E02D5/60E02D5/64E02D27/52E02D37/00
Inventor 张敏冯云亮魏洋纪国睦施建祥蔡泉华刘晓晨高青磊
Owner 南京开博锐工程技术有限公司
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