A Construction Method for Longitudinal Buried Drainage of Asphalt Layer of Highway Bridge

Abstract

The invention discloses a construction method for vertically buried drainage of asphalt layers of highway bridges, comprising the following steps: cement concrete bridge deck pavement, cement concrete bridge deck pavement rough milling, waterproof adhesive layer construction, modified asphalt synchronous crushing Construction of stone seal layer, construction of asphalt concrete lower layer of bridge deck, longitudinal cutting of lower layer along transverse slope or curve low-end anti-collision wall or inner edge of guardrail seat and installation of hollow drainage pipes, adhesive layer sprinkling, construction of bridge deck asphalt upper layer . The invention solves the problem of drainage between asphalt concrete and cement concrete composite bridge decks, improves the water damage resistance of the asphalt pavement of highway bridges, effectively prevents early water damage diseases of the asphalt pavement of highway bridges, improves the use effect of the asphalt pavement of highway bridges and prolongs the service life .

Description

technical field [0001] The invention relates to the technical field of highway construction, in particular to a construction method for vertically buried drainage of asphalt layers of highway bridges. Background technique [0002] Asphalt concrete and cement concrete composite bridge deck is a bridge deck pavement structure often used in highways and urban roads. or three-layer asphalt concrete pavement. Since the overall cast-in-place cement concrete bridge deck pavement cannot be made absolutely flat, there are small pits and unevenness, and the asphalt concrete pavement structure design has a certain void ratio, in rainy or wet conditions, the pits will be In addition, there is no drainage layer between the overall cast-in-place cement concrete bridge deck pavement and the asphalt concrete pavement layer. The water in the pits will remain for a long time, and the hydrodynamic pressure will be generated under the condition of high-speed wheels, causing the asphalt layer t...

AI Technical Summary

Problems solved by technology

Since the overall cast-in-place cement concrete bridge deck pavement cannot be made absolutely flat, there are small pits and unevenness, and the asphalt concrete pavement structure design has a certain void ratio, in rainy or wet conditions, the pits will be In addition, there is no drainage layer between the overall cast-in-place cement concrete bridge deck pavement and the asphalt concrete pavement layer. The water in the pits will remain for a long time, and the hydrodynamic pressure will be generated under the condition of high-speed wheels, causing the asphalt layer to break down. early damage

Or when the temperature rises in clear weather, the water in the pits often spreads to the road surface along the gaps in the asphalt concrete surface layer, causing the road surface to appear in uneven dry and wet states, and the road surface friction is uneven, endangering driving safety

Generally, there is no drainage and drying layer between asphalt concrete and cement concrete composite bridge decks, which is prone to water damage and early disease of bridge asphalt pavement, which leads to increased operation and maintenance costs of road products and reduces the life cycle time of roads.

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