A widening and strengthening process method for double-curved arch bridge deck

Abstract

The invention discloses a two-way curved arch bridge floor broadening and reinforcing process method. The two-way curved arch bridge floor broadening and reinforcing process method comprises the steps of (a) dismounting an original bridge floor concrete road surface and then respectively dismounting a part of curved cavity padding and side walls; (b) conducting bar embedding and concrete filling on two-way curved arch tiles on two sides; (c) installing steel bar concrete cushion blocks with inverted trapezoidal structures at the upper portions of the side walls and then casting a concrete filling-leveling layer on the top face of the curved cavity padding; (d) adopting a prestressed concrete cast-in-place cantilever mode to wholly casting concrete on the concrete filling-leveling layer and meanwhile arranging multiple expansion joints and contraction joints; (e) performing bridge floor conduction including a sidewalk system. By means of the two-way curved arch bridge floor broadening and reinforcing process method, the bearing performance of a bridge can be remarkably improved, bridge floor congestion can be effectively relieved, and meanwhile the two-way curved arch bridge floor broadening and reinforcing process method has the advantages of being convenient to construct, large in bridge floor broadening proportion, capable of remarkably improving side arch bearing capacity, good in reinforcing effect and the like.

Description

technical field [0001] The invention belongs to the technical field of bridge road construction, and more specifically relates to a method for widening and strengthening the deck of a double-curved arch bridge. Background technique [0002] The double-curved arch bridge is a commonly used arch bridge type in China. Due to its convenient construction, beautiful appearance, and low material consumption, this type of bridge has been widely constructed in many regions of the country to meet the needs of transportation. However, due to the increasing traffic volume, the width of the bridge deck often cannot meet the travel requirements, so it is urgently needed to be widened and improved; There must be a surplus, and the arch bridge structure itself has great potential, coupled with the combined effect of the buildings on the arch, that is to say, the bearing capacity of the existing arch bridge cannot be fully utilized; correspondingly, it is necessary to base on the existing ar...

AI Technical Summary

Problems solved by technology

For the former, since the main structure of the arch bridge is still well preserved, the overall structure (especially the lower structure) has no major diseases, and the conical slope at the bridge head and the retaining walls on both sides of the bridge are relatively intact, it is a big waste. , so the new bridge not only requires a large investment, but also the aesthetics and the coordination with the environment are difficult to compare with the old bridge; for the latter, the existing double-curved arch bridge deck widening and strengthening method tends to focus on arch waves or arch ribs. Fully reinforced, the widened and reinforced area is large, the dead load of the upper structure is too large, the cost is high, the construction is complicated and takes a long time, so it is necessary to optimize and improve it

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