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多点顶推法架设桥梁是在各墩台上分别设置两个小吨位的水平千斤顶,将总顶推力分散在多个桥墩上,利用水平千斤顶的反作用力来平衡,改善桥墩在顶推过程中的受力状态,此时桥墩承受的水平力远小于单点顶推时的值。多点顶推特别适用于下部结构为柔性墩台的桥梁施工,其主要工艺特点是:多点、分级、同步,采用“分级调压、集中控制”的施工方式,使千斤顶出力适应柔性墩的受力要求。
Multi-point push method to set up the bridge is set in the piers on the platform of two small tonnage of horizontal jacking, the total thrust to spread on a number of piers, the use of horizontal jacks to balance the reaction to improve the piers in the jacking process Of the state of force, when the pier pier horizontal force is far less than the value of a single point push. Multi-point jacking is particularly suitable for the bridge construction with flexible piers under the structure. The main technological features are: multi-point, grading and synchronization, and the construction method of “grading pressure regulation and centralized control” to make the output of jacks adapt to the flexible piers Force requirements.