Construction method of bidirectional inclined v-shaped bridge tower of cable-stayed bridge without backstays

Abstract

The invention discloses a construction method of a bidirectional inclined v-shaped bridge tower of a cable-stayed bridge without backstays. The construction method is characterized in that: the methodcomprises the following steps of: construction preparation, installation of a stiff framework, positioning of a cable guide pipe, construction of a lower tower column, assembly of a hydraulic climbing formwork, synchronous construction of a tower column and a cable tower in a cable area, construction of a closure section at the top of the tower and removal of a formwork and a cross brace, whereinthe synchronous construction step of the tower column and the cable tower in the cable area comprises four steps of: segmental concrete pouring, tensioning prestress, erection of a support and a cross brace and tensioning of a stay cable.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method for a two-way inclined V-shaped pylon of a cable-stayed bridge without back cables. Background technique [0002] As a cable-tower-beam composite system structure, the cable-stayed bridge has better spanning capacity than beam bridges and arch bridges, lower construction cost than suspension bridges, good mechanical properties and beautiful lines, and plays an important role in modern bridge construction. In recent years, with the improvement of bridge design theory and the improvement of bridge aesthetic status, a series of special-shaped cable-stayed bridges with beautiful shapes and novel structures have been gradually built. Among them, cable-stayed bridges without back cables have become a beautiful landscape in urban landscape bridges. . Compared with the traditional cable-stayed bridge with two towers and two cable planes, cable-stayed bridges with...

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Problems solved by technology

At present, for medium and low tower columns, the construction of full-wall support and overturning is generally used, that is, the full-wall steel pipe support is erected from the ground to the top of the tower, and then the formwork, pouring, maintenance and other constructions are carried out. However, this method is not suitable for the construction of tall tower columns. The bracket formwork used consumes a lot of energy, has a long construction period, and requires a lot of manpower. The erection of steel pipe brackets has high requirements on the bearing capacity of the foundation, and the safety risk is relatively large. For large-volume concrete structures, there are many pouring sections, which are difficult for the pouring quality and alignment. control, there are great limitations to the construction of bridges and high piers in mountainous areas

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