Construction method for erecting prefabricated box girders through walking type bridge girder erection machine

Abstract

The invention relates to the field of bridge construction, in particular to a construction method for erecting prefabricated box girders through a walking type bridge girder erection machine. The method includes the steps that the prefabricated box girders transported through a girder transporting vehicle are lifted at the rear end of the bridge girder erection machine; components such as front and rear supporting legs and middle and rear carrying wheels of the bridge girder erection machine are adjusted; the bridge girder erection machine is pushed to move forwards when the weight of the bridge girder erection machine is kept balanced; the front supporting legs of the bridge girder erection machine are moved to a pier cover beam to be erected and stridden at the front position, the rear supporting legs support the top faces of the font ends of the erected box girders, and therefore a hole passing purpose is achieved; and then a girder transporting crane on the bridge girder erection machine is used for lifting the box girders. By the adoption of the construction method, the defects that a crane needs to be repeatedly erected and moved, the construction efficiency is low, and the risk coefficient is high are overcome. A construction period can be guaranteed, normal construction and vehicle passage of a road under a bridge are guaranteed as well, meanwhile, the construction cost is reduced, the safety coefficient is high, social benefits and economic benefits are good, the method is suitable for being applied to urban prefabricated box girder lifting projects and particularly suitable for lifting of the relatively high prefabricated box girders of the bridge over water.

Description

(1) Technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method for erecting a prefabricated box girder with a walking bridge erecting machine. (2) Background technology [0002] Prefabricated box girder hoisting, as the main project of the bridge, is the focus and difficulty of the entire bridge construction field, and there are many technical problems at the same time. The current prefabricated box girder hoisting construction technology requires repeated support and removal by crane hoisting, the construction efficiency is low, the risk factor is high, and certain protective measures need to be taken. Once the construction environment changes, the construction conditions are complicated, and the construction period is long. Increased construction costs. (3) Contents of the invention [0003] In order to make up for the defects of the prior art, the invention provides a safe and efficient construction method f...

AI Technical Summary

Problems solved by technology

The current prefabricated box girder hoisting construction technology requires repeated support and removal by crane hoisting, the construction efficiency is low, the risk factor is high, and certain protective measures need to be taken. Once the construction environment changes, the construction conditions are complicated, and the construction period is long. Increased construction costs