Construction method for bent cap hoop support integral detachment

Abstract

The invention discloses a construction method for bent cap hoop support integral detachment. The method includes the following steps that S1, pressure bearing devices are installed; S2, steel wire ropes are installed; S3, first-time stress system conversion is conducted; S4, second-time stress system conversion is conducted; and S5, a support vertically descends to the ground. By the adoption of the construction method for bent cap hoop support integral detachment, through two times of stress system conversion, the hoop support integrally and vertically descends to the ground to be disintegrated and detached, plenty of upper air operation and hoisting lifting operation are reduced, the detaching efficiency of the bent cap hoop support is improved, and safety of constructors is guaranteed.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for integrally removing hoop brackets of cover beams. Background technique [0002] With the continuous improvement of bridge construction technology, there are various forms of formwork support for cover beam construction. Among them, the hoop method support is compared with the traditional full hall support. It uses the poured pier to hang on the upper part of the pier column, which has the advantages of simple force transmission and no support settlement. , no need for foundation treatment, and does not affect traffic; compared with suspended supports such as cross-section steel, it uses the friction between the hoop and the pier column as the structural dead load and construction load bearing capacity, which will not affect the pier column structure. The advantages of not affecting the appearance of pier columns are more and more used in brid...

AI Technical Summary

Problems solved by technology

[0003] However, there are also deficiencies in the hoop support. It is a suspended support, and the fulcrum is set on the upper part of the bridge pier. The span of the main beam of the support structure is equal to the span of the cover beam structure, and the span of the secondary beam is equal to the diameter of the pier column. The span of similar components of the system is much larger

In order to ensure that the support meets the requirements of construction safety and service performance, the support mostly adopts trusses or larger steel sections with a large flexural section modulus, and the self-weight of the support components is also relatively large. After the cover beam structure is poured, the support is tightly pressed, and the space for dismantling is limited. According to the traditional method of constructing the support of the cover beam hoop method, a large number of high-altitude operations and lifting operations will be generated, and the personnel will continue to perform high-risk operations for a long time, the construction period is long, and the construction safety control is difficult.

Images