Construction method of corrugated steel plate bridge covered with soil based on crushed stone grouting filling layer

Abstract

The invention discloses a construction method for a soil-covered corrugated steel plate bridge based on crushed stone grouting filling layer. The constructed soil-covered corrugated steel plate bridge includes a main arch and a filling layer covering the outside of the main arch. The main arch includes a load-bearing arch ring and gravel Grouting filling layer; actual construction, including steps: 1. Foundation construction; 2. Arch ring erection; 3. Support frame installation; 4. Grouting pipeline installation; Layer construction; seven, grouting. The invention is reasonable in design, easy in construction, and good in use effect. The arch ring is reinforced by the crushed stone grouting filling layer located on the outside of the arch ring, and the supporting frame is composed of multiple supporting steel bars fixed in the crushed stone grouting filling layer. The support and positioning of the grouting pipeline can greatly simplify the construction process of the gravel grouting filling layer and ensure the construction quality of the gravel grouting filling layer, and the support frame does not need to be dismantled later, the construction is convenient and fast, and can ensure the construction quality of the gravel grouting filling layer. Construction quality of earth-covered corrugated steel plate bridges.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method of a soil-covered corrugated steel plate bridge based on a gravel grouting filling layer. 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, ...

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

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; the first method is slow in construction and consumes high labor costs, 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

Images