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顶升工程大多需要千斤顶多次循环顶升才能达到指定高度,而循环顶升过程中代替千斤顶的临时支顶构件往往无法绝对顶紧上部结构,在千斤顶回油卸载时结构会产生一定的回降,这种回降会对结构产生一定的不利影响,而无降点顶升可以很好地解决这个问题。从连续性倒塌机理入手,结合武当山遇真宫山门无降点同步顶升的实例,展开分析无降点顶升原理及优缺点,得出无降点顶升时顶升点的合理布置方案。
Most of the jacking projects require multiple lifting jacks to reach the specified height, while the temporary jacking components instead of jacks in the jacking process often can not hold the superstructure absolutely. When the jack is unloaded, the structure will have some fallback , This kind of fallback will have a certain adverse effect on the structure, and no drop-point rise can well solve this problem. Starting from the mechanism of continuous collapse and combining with the example of non-drop synchronized rising of Yulingongshan Gate in Wudangshan, the principle and the advantages and disadvantages of no-drop rising are analyzed, and the reasonable arrangement of the lifting point without dropdown is obtained .