Non-bracket arch ring mounting method of concrete-filled steel tubes arch bridge

Abstract

The invention relates to the technical field of bridge construction, in particular to a non-bracket arch ring mounting method of a concrete-filled steel tubes arch bridge. The non-bracket arch ring mounting method of the concrete-filled steel tubes arch bridge comprises the following steps of S1, construction of an arch seat; S2, mounting of a track; S3, erection of a transporting platform; and S4, splicing of arch ribs, wherein after the first section of arch rib is mounted to each arch seat, a crane is transported to the first section of arch rib; by controlling the crane to creep on the track, the crane can hoist the next section of arch rib on the previous section of arch rib; the two adjacent arch ribs in the riverway width direction are spliced with each other through a flange plateto splice an arch ring whose interior is through; and the two opposite arch ribs on the same bottom plate are connected through a cross brace after being spliced with each other; S5, mounting of a buckle cable; and S6, pouring of concrete. According to the non-bracket arch ring mounting method of the concrete-filled steel tubes arch bridge, by enabling the crane to creep on the arch ring and splicing the arch ribs by using a mode of hoisting the arch ribs, the arch ring can be mounted without using a bracket.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for installing an unsupported arch ring of a steel tube concrete arch bridge. Background technique [0002] Arch rib installation technology is one of the foundations for the development of arch bridges. The existing installation methods of CFST arch bridges mainly include support method, swivel method and cable hoisting method. [0003] The bracket method is the construction method of casting or assembling on the bracket, which is suitable for construction conditions such as small span, non-navigable or low navigable requirements, and shallow water depth. [0004] The swivel construction method is a construction method in which the arch ring is divided into two half-spans and manufactured on both banks, and then closed by swivel. The vertical rotation and closure of the arch ring is called the vertical rotation construction method, and the horizontal rotati...

AI Technical Summary

Problems solved by technology

However, as the main load-bearing structure for cable hoisting, as the construction span continues to increase, the construction cost and construction risk are also increasing

With the increase of the span of the CFST arch bridge, the number of hoisting segments of the arch rib and the corresponding hoisting weight are also increasing, and the height of the tower is also increasing, which leads to the instability of the tower and the increase of the risk of hoisting during the construction process.

In addition, with the increase of the span of CFST arch bridge, the efficiency of arch rib hoisting operation is low, the construction control is difficult, and the installation risk is extremely high

Images