Paving method of sleel bridge surface composite layer

Abstract

This invention relatesto a paving method of one pavement material of steel bridge surface, including the following steps: 1) preparation of lightweight concrete of steel mixing fiber and plain lightweight concrete; 2) pre-treatment of steel bridge surface; 3) peg soldering by the method of arc stud welding; 4) steel net bonding: to bind the steel net to the peg by steel thread; 5) choice of inherent stress steel thread and infliction of inherent stress: inherent stress steel thread situates below the natural axis, inflict the inherent stress by pretensioned system, with the controlling stress between 38-42%fptk; 6) pave one layer of lightweight concrete of steel mixing fiber on the steel bridge surface, and then pave one layer of plain light concrete to the light weight concrete of steel mixing fiber; 7) pave one layer of asphalt conctete on the plain light weight concrete. This invention can efficiently solve such technical difficulties as rutting, traction and cuddling, improve greatly road qualities of the pavement and prolong the application life of steel bridge.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a paving method for steel box girder bridge surface materials. Background technique [0002] Steel decks are more and more widely used in long-span bridges because of their convenient construction, light weight, and economical savings. A large number of existing bridges at home and abroad use this type of deck structure. Steel bridge deck pavement generally refers to laying a 10cm thick asphalt surface layer on the steel plate, and the bridge deck and the asphalt surface layer are bonded together by an adhesive. Under high temperature conditions in summer, the temperature of the steel bridge deck will reach about 60-80°C, causing the bonding material to become invalid due to softening, and the stability of the asphalt concrete will deteriorate. Debonding between the bridge deck and the asphalt pavement will cause the asphalt pavement to develop defects such as shift...

AI Technical Summary

Problems solved by technology

In the past, some design departments also adopted some other pavement materials and technologies, such as using concrete to replace the asphalt mixture layer. The layer is prone to brittle failure under the action of heavy load and dynamic load, which will affect the performance of the bridge deck, so this scheme has not achieved the expected effect

Images