A construction method of corrugated steel plate bridge covered with soil

Abstract

The invention discloses a construction method for a soil-covered corrugated steel plate bridge. The constructed soil-covered corrugated steel plate bridge includes a main arch and a filling layer covering the outer side of the main arch; the main arch includes a load-bearing arch ring and a prestressed reinforcement arranged outside the load-bearing arch ring Structure; when constructing the corrugated steel plate bridge covered with soil, it includes steps: 1. Splicing of load-bearing arch rings; 2. Construction of filling soil layer. The method of the present invention has simple steps, reasonable design, convenient construction and good application effect. The spliced ​​load-bearing arch ring is reinforced in sections by using the prestressed reinforcement structure, and the structure and layout of each prestressed tendon group in the prestressed reinforcement structure The position is limited, which can effectively improve the integrity and mechanical performance of the formed arch ring, and can effectively prolong the durability of the arch ring, ensuring the integrity and overall rigidity of the constructed soil-covered corrugated steel plate bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method of a corrugated steel plate bridge covered with soil. Background technique [0002] Corrugated steel plate is a corrugated steel plate made by pressing structural steel plate into a corrugated shape according to specific specifications. Due to the existence of corrugations, the bending moment of inertia of the steel plate is increased, so that the corrugated steel plate has higher bearing capacity and stability. The orthotropy and ease of processing of corrugated steel plates enable corrugated steel structures to be fragmented and modularized in the factory, and then mechanically assembled into pipes, culverts, arch bridges and other structural forms on site after painting and plating processes. The corrugated steel plate arch bridge covered with soil uses corrugated steel plates as the arch ring, and soil is filled on both sides and...

AI Technical Summary

Problems solved by technology

Invention patent application ZL201320127712.0 published on November 6, 2013 discloses a combined corrugated steel plate arch bridge, which adopts double-layer corrugated steel plate butt joints, and fills concrete between the two layers of corrugated steel plates to form a combined section to improve The rigidity and bearing capacity of the arch ring; however, the limitation of the combined corrugated steel plate arch bridge is that the amount of steel used for double-layer corrugated steel plates has doubled, and the filling of concrete between the steel plates has higher requirements for on-site construction. Convenience is greatly reduced

Invention patent application 201310079450.X published on May 22, 2013 discloses a hollow-type long-span composite corrugated steel plate arch bridge structure filled with soil. Bolts are used to form reversed double-layer slabs, and the interlayer is set with studs and filled with high-strength mortar to form a whole sandwich mortar composite corrugated steel plate. The limitation is that the inner wall of the corrugated steel plate is equipped with studs, the process is relatively complicated, and the use of double-layer steel plate reduces the economy

According to the analysis, the bearing capacity of the corrugated steel plate bridge with soil comes not only from the steel plate itself, but more importantly, the restraining effect of the soil outside the corrugated steel plate on the deformation of the steel plate. However, it is difficult to compact the filling soil outside the corrugated steel plate near the corrugated steel plate during construction. , which reduces the constraint effect of the soil on the steel plate. The main reason is that the compaction machine cannot be too close to the steel plate bridge to prevent damage to the steel plate, and when it is too close to the compaction, the earth pressure may cause the corrugated steel plate to deform.

In addition, because the corrugated steel plates are usually overlapped with each other, defects such as low transverse connection stiffness, poor transverse integrity, and insufficient longitudinal stiffness often occur in practical applications. Especially when the span exceeds a certain range, the overall rigidity of the corrugated steel plate arch bridge is difficult to meet need

In addition, there is currently a lack of methods that can easily and effectively splice multiple arch ring splicing segments

At present, there are mainly two splicing methods for the splicing section of the arch ring, the first is welding, and the second is flange and bolt connection, but the construction speed of the first method is slow and the labor cost is high. Although the second method is The construction is fast, but the structural characteristics and advantages of corrugated steel are not fully utilized, and damage and unreliable connections are prone to occur at the connection parts

Moreover, the corrugated steel arch ring structure formed by splicing has poor durability and poor mechanical performance, especially the corrugated steel arch ring with a span greater than 20m and a transverse width greater than 50m, which has poor integrity and poor mechanical performance, which is inevitable There will be many damaged parts, and the later repair work will be heavy

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