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整体同步顶升施工就是在维修更换桥梁支座时,对使用的所有电动同步千斤顶在整个顶升过程中,保持速度一致、出缸量一致、梁板整体抬高一致,使之不出现局部受力过大,不改变桥梁上部结构原来的受力状态,是保证桥梁在施工中不受损坏的一项重要技术措施。在京张高速公路维修更换桥梁支座的工程中,采用了同步顶升施工技术,对两座5—13m和一座8—13m连续现浇混凝土板桥的142个支座进行了更换
The overall synchronization jacking construction is to repair the replacement of bridge bearings, the use of all electric jacks in the entire jacking process to maintain the same speed, the same amount of cylinder, raised the whole board consistent, so that no local exposure It is an important technical measure to ensure that the bridge will not be damaged during construction if the force is too large and does not change the original stress state of the superstructure of the bridge. In Beijing Zhang highway maintenance replacement bridge bearing project, the use of synchronous jacking construction technology, the two 5-13m and a 8-13m continuous cast-in-place concrete slab of 142 bearings were replaced