Construction method for main tower of cable-stayed bridge

Abstract

The invention provides a cable-stayed bridge main tower construction method, a cable-stayed bridge main tower comprises a pair of lower tower columns, a pair of upper tower columns, a lower cross beam and an upper cross beam, the two ends of the lower cross beam are connected to the joints of the upper tower columns and the lower tower columns on the two sides of the main tower respectively, and the two ends of the upper cross beam are connected with the top ends of the two upper tower columns respectively; the main tower construction method comprises the following steps that 1, a lower tower column is constructed, and the lower tower column is constructed in a rollover mode; 2, a lower cross beam is constructed, the lower cross beam is constructed through a support method, concrete of the lower cross beam is poured in multiple sections, and the prestressed tendons of the corresponding parts are tensioned after pouring; 3, an upper tower column is constructed, the upper tower column is constructed through a hydraulic creeping formwork, the segmented pouring height of the hydraulic creeping formwork is combined with the position of the steel anchor beam embedded part to be segmented, and the upper tower column is poured to the position below the upper cross beam; 4, an upper cross beam is constructed, the upper cross beam is constructed through a support method, the bearing capacity and stability of a support system are checked, calculated and analyzed, and the design of the support system is perfected; and the construction efficiency of the cable-stayed bridge main tower is improved.

Description

technical field [0001] The invention belongs to the technical field of tower column construction of cable-stayed bridges, and particularly relates to a construction method of a main tower of a cable-stayed bridge. Background technique [0002] A cable-stayed bridge is a composite system bridge in which the tower is in compression, the cable is in tension, and the beam is in bending. The system can effectively reduce the height of the building structure, reduce weight and save materials. Modern cable-stayed bridges occupy an important position in modern bridge structures due to their good structural performance, large spanning capacity, reasonable economic indicators and beautiful architectural shapes. The cable-stayed bridge has developed rapidly. [0003] At present, the main towers of cable-stayed bridges are generally cast in two ways: overturn construction and hydraulic climbing form casting. The so-called hydraulic climbing form casting means that a set of hydraulic c...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for the main tower of a cable-stayed bridge, to at least solve the problems that the current single climbing formwork construction method cannot complete the construction of the main tower.

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