Suspended cast beam No. 0 block bracket opposite-fulcrum prepressing construction method

Abstract

The invention relates to a suspended cast beam No. 0 block bracket opposite-fulcrum prepressing construction method which comprises the following steps of: respectively embedding more than one steel strand connectors along the longitudinal direction on the left side and the right side inside a bearing platform, wherein each row of steel strand connectors is provided with a plurality of steel strand connectors, the quantity of the steel strand connectors in all rows of steel strand connectors are equal, each steel strand connector is fixedly connected with the bottom end of one steel strand respectively, and each steel strand extends along the vertical direction to penetrate out the top end of the bearing platform; arranging a bracket above the constructed bearing platform; laying a bracket load distribution beam on the top of the bracket along the horizontal direction, and connecting the bracket load distribution beam with the upper parts of all the steel strands by using tool anchors and clamping pieces. The invention aims at providing a suspended cast beam No. 0 block bracket opposite-fulcrum prepressing construction method which can effectively eliminate the non-elastic deformation of the bracket and reduce the construction period, the elastic deformation value of the bracket can be accurately obtained, accurate parameters can be provided for elevations of bottom dies and vertical dies for No. 0 block construction, and the method has good economic and social benefits.

Description

technical field [0001] The invention relates to a construction method for anti-fulcrum preloading of the No. 0 block bracket of a cantilevered beam. Background technique [0002] With the continuous development of bridge construction technology, large-span cantilevered beams with high piers are widely used in the current highways, especially in mountainous areas. The bracket is preloaded. Conventional preloading methods include water tank preloading, hoisting steel or sand (soil) bag preloading, etc., but such preloading construction methods are often restricted by factors such as terrain conditions, material turnover, and construction period, and cannot be effective. Eliminate the inelastic deformation of the bracket, and calculate the elastic deformation value of the bracket based on the observed and recorded data of the existing preloading construction method, which is not scientific and accurate, and the construction effect based on this is often not ideal, and it is di...

AI Technical Summary

Problems solved by technology

Conventional preloading methods include water tank preloading, hoisting steel or sand (soil) bag preloading, etc., but such preloading construction methods are often restricted by factors such as terrain conditions, material turnover, and construction period, and cannot be effective. Eliminate the inelastic deformation of the bracket, and calculate the elastic deformation value of the bracket based on the observed and recorded data of the existing preloading construction method, which is not scientific and accurate, and the construction effect based on this is often not ideal, and it is difficult to meet the quality requirements of the construction