Method for construction of multi-point integral top pulling steel case beam

Abstract

The invention discloses a multi-point overall pushing steel box girder construction method, which belongs to the field of bridge engineering. The invention adopts tooth plates with tooth grooves on the steel box girder and the web of the guide beam, and uses the jack to provide jacking force, wherein the piston rod of the jack is provided with a slide block, and the slide block is provided with a ratchet block with a slope And its control spring, its inclined surface is located at the side of the jack, and the thrust of the steel box girder and the guide beam is applied to the steel box girder and the guide beam by the thrust of the jack, and the ratchet will withdraw from the tooth groove and enter the next thrust in the return stroke; The jack provides support and adjusts the elevation of the corresponding point. At the same time, displacement sensors and pressure sensors are installed on the jack and the jack to collect real-time information, so as to control the process of pushing. The invention has less steel consumption, controllable support reaction force and thrust, and can well solve the problem of steel box girder rotation angle.

Description

(1) Technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a construction method of multi-point integral jacking steel box girders. (2) Background technology [0002] Steel box girders are lighter than concrete girders, and are widely used in the construction of long-span cable-stayed bridges and suspension bridges at home and abroad. Due to the different structural forms of bridges, topographic conditions of bridge sites, shipping conditions, and transportation conditions, the erection methods are also different. At present, there are mainly bracket frame methods, temporary upsetting integral hanging method, cable-stayed cantilever assembly method, cable-loaded crane frame method, etc. Wherein the Intellectual Property Office of the People's Republic of China published on November 28, 2007 titled "A Steel Box Girder Erection Method Applied to Self-anchored Suspension Bridge", and the application number is 200710035272....

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the large amount of steel used and the heavy workload of the above technologies, and the poor synchronism and stability of the push and push, and the problem of the corner of the steel box girder cannot be well solved, the present invention provides a steel box with less steel used, and the supporting reaction force and thrust can be adjusted. control, and can well solve the steel box girder corner problem multi-point integral jacking steel box girder construction method

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