Existing roadbed-modified bridge at route intersection and construction method

Abstract

The invention relates to an existing roadbed-modified bridge at a route intersection. The existing roadbed-modified bridge comprises a bent cap, pile foundations, a newly-built road surface system and a bridge deck slab. The pile foundations are arranged on slopes on the two sides of an existing roadbed at the route intersection, the bent cap is arranged at the tops of the pile foundations, and the pile foundations and the bent cap form a pile foundation bent cap structure. The bridge deck slab is arranged on the bent cap, the newly-built road surface system in lap joint with an existing road surface system is arranged on the bridge deck slab, a channel with an inclined protection slope is arranged below the bridge deck slab, and a newly-built route penetrates through the channel; and a bent cap groove is dug in a closed expressway, and a T-shaped gap bridge is arranged on the dug bent cap groove. The construction method has the beneficial effects that compared with the traditional technology, the existing roadbed is changed into the bridge at the route intersection, pile and column integrated pile foundation construction is conducted on local excavation of the roadbed slope, secondary connection between piles and manufacturing of pier column steel formworks are avoided, the construction period is shortened, normal traffic is not affected, and the technical advantages are obvious.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to an existing roadbed at a route intersection and a construction method thereof. Background technique [0002] In recent years, with the continuous advancement of urbanization in our country, urban planning and construction have achieved unprecedented development, and the supporting transportation network has also become increasingly developed. It is inevitable that there will be many intersections between new road routes and existing road routes. Urban roads and expressway intersections can adopt two schemes: urban roads cross over or under expressways. When the subgrade of the existing road at the intersection is relatively low, the scheme of building a new upper-span bridge across the existing road is generally adopted; but when the filling height of the existing road subgrade at the intersection is relatively high, and the conditions for the new road to pass under ...

AI Technical Summary

Problems solved by technology

However, this method often requires steel sheet pile protection for the highway subgrade of Baotong Road, which increases the construction cost virtually. Moreover, the long construction period of bored piles increases the difficulty of construction and traffic organization, and has a great impact on Baotong traffic.

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