计算机自动控制液压技术在桥梁整体安装工法中的应用

本文通过北京昌平西关环岛桥梁改造这一国内首次桥梁上部结构整体置换工程案例的主要实施过程,详细介绍了自行式运梁车、均载系统、同步顶升千斤顶系统、提梁机、万向千斤顶等分别采用不同功能的计算机自动控制集成液压技术。基于计算机有限元软件对空间异形结构各工况施工过程受力状况的精确分析和验证,结合计算计算机自动控制液压顶升技术在旧梁使用过程中支护、旧梁移动运输、旧梁提降破碎、新梁整体称重、新梁整体运输、新梁精确整体就位等关键工序中应用,满足支顶系统在异形板各支点反力差异大情况下的自动调整适应、保持梁体变形在移动过程中路线纵横坡度变化下的有效控制,是新工法得以顺利实施的重要前提。

Application of computer automatic control hydraulic technology in bridge integral installation construction

In this paper, through the transformation of Xiguan bridge around the island in Beijing Changping, the main implementation process of the first overall replacement project of bridge superstructure, the paper introduces in detail the computer automatic control integrated hydraulic technology with different functions for self-propelled beam carrier, load sharing system, synchronous jacking jack system, beam lifting machine and universal jack. Based on the accurate analysis and verification of the stress conditions in the construction process of the space special-shaped structure by the computer finite element software, combined with the application of the computer automatic control hydraulic jacking technology in the key processes of supporting, moving and transporting the old beam, lifting and crushing the old beam, weighing the new beam as a whole, transporting the new beam as a whole, and accurately placing the new beam as a whole during the use of the old beam, the roof support system can be used in the special-shaped plate It is an important prerequisite for the smooth implementation of the new construction method to automatically adjust and adapt to the large difference of the reaction force of each fulm, and to keep the deformation of the beam body under the change of the vertical and horizontal slope of the route during the moving process.