Support-free suspension and locking construction method for assembly type segmental box girder

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to an assembly type segmental box girder support-free suspension and locking construction method which comprises the steps that (1) a suspension beam is placed and fixed to the top face of a pier top zero block, and a screw jack and a three-way jack are arranged at the two ends of the suspension beam; (2)a hanging support is installed on the first pair of prefabricated section box girders in advance, and the first pair of prefabricated section box girders is hoisted to a screw jack; (3) measuring theposition of the prefabricated segment box girder, replacing a screw jack with a three-way jack to support the first pair of prefabricated segment box girders, and adjusting the prefabricated segmentbox girders with the three-way jack; (4) mounting a wet joint template; (5) pouring a wet joint; (6) tensioning the first pair of prefabricated section box girders; and (7) dismounting and transferring the hanging support and the hanging beam. The fixed installation of the prefabricated segmental beam is not limited by high piers and complex geological conditions, and the fixed installation of theprefabricated segmental beam can be used in a large range.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to an assembly-type segmental box girder suspension and locking construction method without supports. Background technique [0002] With the continuous development of bridge construction technology in our country, the prefabricated prefabricated segmental box girder assembly process has been widely used in urban bridge construction at home and abroad because of its fast, accurate and environmentally friendly characteristics. In the assembly process of the prefabricated segmental box girder, the existing technology usually uses the lower support system as a temporary support. The construction method of the assembled segmental box girder has a stable stress system and is easy to operate. However, its scope of application is limited, and it is difficult to operate under high pier and complex geological conditions, and the cost of use is high. Therefore, the method of using ...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a construction method of suspension and locking of an assembled segmental box girder without brackets, so as to solve the problem that the construction method of using the lower bracket system for temporary support in the prior art is greatly restricted and cannot The problem of promoting the application on a large scale

Images