Soil covering corrugated steel plate bridge construction method

Abstract

The invention discloses a construction method of a soil covering corrugated steel plate bridge. The constructed soil covering corrugated steel plate bridge comprises a main arch and a soil filling layer covering an outer side of the main arch, wherein the main arch comprises load-bearing arch rings and prestress reinforcing structures arranged on an outer side of the load-bearing arch rings. Whenthe soil covering corrugated steel plate bridge is constructed, the method comprises steps that 1, the bearing arch rings are spliced; and 2, soil filling layer construction is performed. The method is simple in step, reasonable in design, easy and convenient to construct and good in using effect; a prestress reinforcing structure is adopted for carrying out sectional type overall reinforcing of the spliced type bearing arch rings, the structure and the arrangement position of each prestressed rib group in the prestressed reinforcement structure are limited, so integrity and stress performanceof the constructed and formed arch rings can be effectively improved, durability of the arch rings can be effectively prolonged, and integrity and overall rigidity of the constructed and formed soilcovering corrugated steel plate bridge are ensured.

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. Soil-covered corrugated steel plate The arch bridge uses corrugated steel plate as the arch ring, and soil is filled on both sides and above the arch ...

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. , 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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