Large-span support method and device of medium-caliber self-bearing straight steel pipe bridge

Abstract

The invention relates to a large-span support method and a device of a medium-caliber self-bearing straight steel pipe bridge. A pipe with a medium caliber realizes large-span aerial erection on a flexible bracket through a longer distance; the flexible bracket consists of a cement concrete pipe pier, a pipe support base and a fixed frame; and a mounting method of straight steel pipe large-span support comprises the following steps: the cement concrete pipe pier is built on a large-span fulcrum; the top of the pipe pier is coated by cement mortar as an arc shape, and is corresponding to the pipe diameter of a placed steel pipe; then, antirust barrier paint is used for coating the arc surface to reach the smooth and bright degree; a rubber mat is placed; and finally, the steel pipe is laid on the rubber mat, so that the uniform surface contact of the outer wall of the pipe replaces traditional nonuniform linear contact; the steel pipe connecting place is positioned on the flexible bracket; and two sections of pipe ports in the steel pipe connecting place are respectively welded with flange plates, and are connected through stainless steel bolts and nuts. The straight steel pipe can realize 32 m large-span connection to save the space and the pipe number.

Description

Technical field [0001] The invention relates to a large-span support method and device for a straight steel pipe, which is a method for erecting a medium-diameter pipe on a flexible support with a long-span in the air. Background technique [0002] Many municipal water supply transportation uses pipelines, such as oil, natural gas, tap water, sewage, etc. Generally, pipelines are buried in the ground, but sometimes when the transportation passes through certain areas, large spans in the air are also required. Erection, when erecting a large-span straight steel pipe, in order to ensure that the pipe is straight and will not deform, the two ends of the pipe need to be equipped with support devices on the ground or buttresses. The design of the support devices should meet the following requirements: 1. It does not affect traffic and safety; 2. The material of the pipe must be good to ensure that the pipe is not easily deformed in the span; 3. The contact between the supporting devic...

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above-mentioned published documents that to realize the large-span erection of steel pipes, better pipe supports are required, or flexible suspenders are arranged under the pipes to form a stable space structure, or the two ends of several tension steel cables are respectively fixed in the positioning On the end head and the positioning end tail, the double-force cascade body and the tension device are clamped in a straight line between the positioning end head and the positioning end tail, but how the brackets at both ends make the pipe installation stable and ensure the anti-corrosion performance has not been reported.

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