Pre-stressing reinforced and widened bridge structure

Abstract

The invention discloses a pre-stressing reinforced and widened bridge structure, which comprises an old bridge, a widening beam I and a widening beam II, wherein the widening beam I and the widening beam II are parallelly and respectively positioned on the two sides of the old bridge and are rigidly connected in the transverse direction with the old bridge; the two ends of a pre-stressing rope or a pre-stressing rib are transversely and respectively arranged outward and are upwards inclined, extended and anchored on the widening beam I and the widening beam II; and the pre-stressing rope or the pre-stressing rib is acted on the old bridge through a steering device. While being widened, the old bridge can be reinforced by the structure, the stress between the newly added part and the old bridge is balanced, the occurrence and the development of defects of the old bridge can be effectively inhibited, the structure and the construction of the bridge are relatively simple, the structure of the old bridge is not damaged, the structural performance is reliable after the old bridge is widened and reinforced, the construction period is relatively short, the influence on road traffic is relatively small, the damage to natural environment and the adverse influence on society when the old bridge is demolished are avoided, and very good comprehensive technical, economic and social benefits are achieved.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a structure for strengthening and widening bridges. Background technique [0002] Bridges are an essential facility for road traffic. Due to various reasons such as low traffic volume and vehicle load in the early stage and limited economy, the design width of girder bridges is usually not large. With the development of the economy, the traffic volume and vehicle load increase, the traffic capacity and bearing capacity of the original girder bridge are obviously insufficient, and with the increase of service time, the bridge will have different types of diseases, which will affect the bearing safety and durability of the bridge structure. If the old bridge is demolished to build a new bridge, it will require a lot of construction costs, resulting in a waste of manpower and material resources, and the new bridge period is longer, affecting the traffic on the original road and hind...

AI Technical Summary

Problems solved by technology

However, due to the horizontal connection of this structure, the two can only form a whole. The newly added structure forms a cantilever structure along the horizontal direction, which inevitably makes the old and new structures uncoordinated under stress and deformation, and even has early-rising diseases, which increases the burden on the old bridge and shortens the bridge. The problem of service life of old and new structures

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