Flexible freeze-thaw resistance treatment method for highway bridge expansion joints in seasonal frozen soil region

A technology for highways and treatment methods, which is applied to bridges, bridge parts, bridge maintenance, etc., can solve the problems of highway bridge expansion joint damage and poor maintenance effects, and achieve the goals of preventing water seepage and soil leakage, simple technology, and improved anchorage performance Effect

Active Publication Date: 2015-08-19
吉林省银河水利水电新技术设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a flexible anti-freezing and thawing treatment method for the expansion joints of expressway bridges in seasonally frozen soil areas, so as to solve the problem that the expansion joints of highway bridges are frequently damaged and the maintenance effect is not good

Method used

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  • Flexible freeze-thaw resistance treatment method for highway bridge expansion joints in seasonal frozen soil region
  • Flexible freeze-thaw resistance treatment method for highway bridge expansion joints in seasonal frozen soil region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Include the following steps:

[0070] 1. Chisel out the damaged concrete in the original anchorage area, remove the original concrete material, and pour high-performance anti-corrosion concrete 5,

[0071] The high-performance anti-corrosion concrete includes the following raw materials in parts by weight:

[0072] Universal Portland cement PO42.5 700 parts,

[0073] Medium coarse sand 2000 parts,

[0074] 2000 stones,

[0075] 300 parts of water,

[0076] The composite material comprises the following raw materials in parts by weight:

[0077] Polycarboxylate superplasticizer 60 parts,

[0078] 0.03 parts of air-entraining agent,

[0079] Silicone resin polyether emulsion 0.02 parts

[0080] Mortar Mate 2 parts,

[0081] (2) Flexible filling material between the expansion joints of side beams

[0082] (1) Use a steel wire brush to brush the liquid steel surface derusting and phosphating agent between the Mauler expansion joints of the side beams, derusting and p...

Embodiment 2

[0114] Include the following steps:

[0115] 1. Chisel out the damaged concrete in the original anchorage area, remove the original concrete material, and pour high-performance anti-corrosion concrete 5,

[0116] The high-performance anti-corrosion concrete includes the following raw materials in parts by weight:

[0117] General Portland cement PO42.5 850 parts,

[0118] Fly ash Class I 150 parts,

[0119] 5 parts of ternary copolymer fiber,

[0120] Silica fume, SiO2 content greater than 90%, specific surface area between 13,000 square meters / kg and 20,000 square meters / kg 50 parts,

[0121] Medium coarse sand 2500 parts,

[0122] 2650 stones,

[0123] 380 parts of water,

[0124] The composite material comprises the following raw materials in parts by weight:

[0125] Polycarboxylate superplasticizer 105 parts,

[0126] 1.52 parts of air-entraining agent,

[0127] Silicone resin polyether emulsion 2.01 parts,

[0128] Low-viscosity thickening plasticizer, viscosit...

Embodiment 3

[0165] Include the following steps:

[0166] 1. Chisel out the damaged concrete in the original anchorage area, remove the original concrete material, and pour high-performance anti-corrosion concrete 5,

[0167] The high-performance anti-corrosion concrete includes the following raw materials in parts by weight:

[0168] Universal Portland cement PO42.5 1000 parts,

[0169] Fly ash Class I 300 parts,

[0170] 10 parts of ternary copolymer fiber,

[0171] Silica fume, SiO2 content greater than 90%, specific surface area between 13,000 square meters / kg and 20,000 square meters / kg 100 parts,

[0172] Medium coarse sand 3000 parts,

[0173] 3300 stones,

[0174] 460 parts of water,

[0175] The composite material comprises the following raw materials in parts by weight:

[0176] Polycarboxylate superplasticizer 150 parts,

[0177] Air-entraining agent 3 parts,

[0178] Silicone polyether emulsion 4 parts,

[0179] Low-viscosity thickening plasticizer, viscosity is 50~10...

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Abstract

The invention relates to a flexible freeze-thaw resistance treatment method for highway bridge expansion joints in a seasonal frozen soil region and belongs to a maintenance and treatment method for the traffic road bridge broken maurer joints. The method includes: chiseling off the broken concrete of the original anchorage zone, clearing the original concrete materials, pouring the high-performance wear-corrosion resistance concrete, filling the flexible filling materials in the boundary beam maurer expansion joints, wherein the initial setting time of the filleting materials is 3-5 hours, and the consolidation time is 25-30 days, and ending the treatment. The flexible freeze-thaw resistance treatment method for the highway bridge expansion joints in the seasonal frozen soil region can improve the anchorage performance of the maurer joints, resists the freeze and thaw, prevents the water seepage and earth leakage, solves the problem that the expansion joints of the road bridge often occur, achieves the joint sealing purpose by direct embedding of the flexible wear-corrosion resistance filler in the joints, is simple in treatment method, and not only can prevent the water seepage and earth leakage of the expansion joint, but also is free of freeze and thaw in winter.

Description

technical field [0001] The invention belongs to a maintenance and treatment method for damaged maule joints of traffic road bridges. Background technique [0002] The expansion joints of expressway bridges in seasonally frozen soil areas are generally Maurer expansion joints 1’, such as figure 2 , including the anchorage area 5 and the bridge deck pavement layer 7. In the anchorage area, there are pre-embedded steel bars 11, structural bars 8 and anchoring steel bars 10. The steel plate 9 is fixedly connected to the anchoring steel bar, and the side beam 4 is fixedly connected to the steel plate. There is a V-shaped waterproof sealing strip 3' between the side beams. The two design principles of Maurer expansion joints are "rigid anchorage" and "sealing and waterproofing". The above question: [0003] 1. Rigid anchoring has the problem of poor anchoring effect, and sometimes the edge beam of the expansion joint is tilted, which not only affects the operation of the vehicle...

Claims

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Application Information

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IPC IPC(8): E01D19/06E01D22/00C04B28/04
Inventor 郑铎周继元杨金良
Owner 吉林省银河水利水电新技术设计有限公司
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