Installing and constructing method of special-shaped tie bar, arch bridge and arch ring

Abstract

The invention discloses an installing and constructing method of a special-shaped tie bar, an arch bridge and an arch ring. The few-support method manufacturing and installing method of only arrangingtemporary support steel pipe piles at rod piece joints specifically includes the steps of making a preparation before construction, constructing temporary supports in water, hanging steel arch ribs,installing folding sections of the steel arch ribs, welding bridge positions, installing arch rib hanging rods and detaching arch rib temporary supports. During construction, a prefabricating and splicing mode is adopted, splicing is conducted through floating cranes, and the occupation and pollution of a water domain under a bridge are reduced; the multiple procedures are operated in parallel, the construction progress is accelerated, and the construction period is shortened; the temporary supports are only arranged at joint annular seams of large-section arch rib sections, the supports are small in occupied space, the passage under the bridge in the construction state is facilitated, and the influences on the passage under the bridge in across-lake construction and the surrounding socialenvironment are reduced; the errors of the steel arch rib sections are effectively reduced in the construction process, precise positioning and welding are achieved, and the linear manufacturing precision of the special-shaped arch ribs is ensured.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for installing and constructing an arch ring of a special-shaped tie-rod arch bridge. Background technique [0002] Generally, the suspenders of the tie-bar arch bridge are arranged vertically, and the load is transmitted to the main arch through the suspenders, so that the rational arch axes are all symmetrical curves. If the suspenders are arranged obliquely according to a slope, the derived reasonable arch axis is a skewed curve, and thus a new type of bridge structure-special-shaped arch bridge is obtained. [0003] The span structure of the special-shaped arch bridge is composed of the main arch circle, inclined suspenders, tie beams and bridge deck. Regardless of the special-shaped arch or the normal arch, under the action of the load, the pressure line is consistent with the axis of the arch, which is a reasonable structural form. [0004...

AI Technical Summary

Problems solved by technology

[0004] The construction difficulties of special-shaped arch bridges are mainly as follows: 1. High accuracy of steel arch rib alignment control: it is necessary to ensure the arch rib horizontal curve alignment and vertical curve alignment at the same time during on-site assembly, and also require spatial alignment. Difficulty; 2. Steel arch ribs are installed in a large lake for construction, the site is limited, and arch rib material storage and construction are limited; 3. Construction schemes that have little impact on navigation must be adopted in some water constructions; 4. The overall span of the arch bridge is relatively large , design and construction are difficult

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