Method and steel pipe support for construction of arch tower of inclined arch tower double-cable-plane prestressed concrete cable-stayed bridge

Abstract

The invention discloses a method and steel pipe support for construction of an arch tower of an inclined arch tower double-cable-plane prestressed concrete cable-stayed bridge. The method is characterized by comprising the steps that a main tower is vertically divided into a plurality of constructed sections according to the line shape of a construction template and the main tower, a tower body of the main tower is constructed through combination of a hydraulic creeping formwork and hanging construction of stay cables, the hydraulic creeping formwork bears construction loads of concrete of the constructed sections and transmits the construction loads to a tower column below the constructed sections, the vertical loads of the tower body are transmitted to a main tower bearing platform through the tower body, horizontal force generated due to inclination of the tower body serves as temporary cable stretch-draw balance through the stay cables which stretch or are drawn gradually along with the construction processes, and after the structure of the main tower is capped, all temporary cables stretch and are drawn primarily according to the design requirements to become working cables of the design of the cable-stayed bridge. By means of the method and steel pipe support, in the construction process of the arch tower of the inclined arch tower double-cable-plane prestressed concrete cable-stayed bridge, on the premise of ensuring the stress stability, the construction quality is ensured, and the construction schedule is improved.

Description

technical field [0001] The invention relates to a construction method of an oblique arch tower used in the construction of a prestressed concrete cable-stayed bridge with oblique arch towers and double cable planes. Background technique [0002] In the prior art, when the tower surface is vertical, that is, the tower column is along the bridge without inclination, the construction method of gradually increasing the height of the tower top is adopted, and the support is arranged symmetrically in the arch circle of the tower column. Components to ensure the safety and stability of the tower until the construction reaches the top of the tower. [0003] figure 1 As shown, it is a prestressed concrete cable-stayed bridge with oblique arch towers and double cable planes. The center line of the arch towers and columns is inclined 12° along the bridge direction, and the arch towers are arched in the transverse direction of the bridge. The height of the tower columns reaches 67.597m...

AI Technical Summary

Problems solved by technology

For this form of arch tower, due to the inclination of the tower column, large span and large load, its stress stability along the bridge direction must be considered. However, the construction method for non-inclined reinforced concrete arch towers in the prior art cannot guarantee Its stress stability along the direction of the bridge will greatly affect the construction progress and even affect the construction quality

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