Assembly process of jq900a bridge erecting machine

Abstract

The invention discloses a JQ900A bridge erecting machine assembly technology and belongs to the technical field of bridge construction. The technology includes the following steps: assembling a load-carrying support; adjusting the height (on a girder transporting vehicle) of sleeves of the support; identifying drop point positions at the bottoms of girders and drop point positions on lugs of the support; hoisting the girder on one side, wherein the girder transporting vehicle enters from the rear side to drop down the girder; hoisting and dropping down the girder on the other side; retesting the girders; mounting flower stands and connection beams; mounting the upper column bodies of second columns, wherein sleepers at the bottom are stacked to perform supporting; mounting a jacklift; lifting the load-carrying support to the high level; mounting the column bodies of third columns; mounting the column bodies of first columns; mounting an electric appliance, a hydraulic system, a crawling ladder, railings and a walking board; mounting the lower column bodies of the second columns and performing debugging; performing type tests. Small-tonnage cranes are utilized, assembly of a JQ900A bridge erecting machine is achieved, while construction quality is ensured, assembly costs are reduced, and the assembly technology is simple and easy to perform.

Description

technical field [0001] The invention relates to a bridge erecting machine assembly process, which belongs to the technical field of bridge construction. Background technique [0002] Dedicated passenger line (high-speed railway) is the development direction of my country's railway construction and represents the development trend of China's railway technology. The prestressed concrete whole hole box girder has the advantages of high rigidity, good overall performance, fast construction speed, and easy quality assurance, so it has become the preferred bridge superstructure form for domestic high-speed railways and passenger dedicated lines. [0003] At present, the domestic 900-ton box girder construction technology has been rapidly developed in recent years, but the domestic bridge erecting machine assembly construction technology has not been innovated. The technology currently used is that after the ground machine arm is assembled and formed, it is lifted to the carrying ...

AI Technical Summary

Problems solved by technology

[0004] However, in the process of railway construction in Northwest China, due to the large area and sparse population, the construction mileage of beam erection is long, but the construction equipment is lacking, and the applicability of traditional construction schemes is not strong

And for the erection of the main girder in the traditional scheme, four large cranes of more than 130 tons or two girder lifting machines of 450 tons are used to lift the main girder from both sides to a high position at the same time, so that the construction cost is very high

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