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采用坡度控制计算盆式开挖预留土体边坡内力、变形、应变以及采用坡度和悬臂高度控制计算盆式开挖支护桩的内力、变形的方法,对青岛金街工程基坑留设不同坡度预留土体和不同支护桩悬臂高度时的盆式开挖进行了二维有限元分析。在保证基坑稳定的条件下,通过分别控制预留土体边坡坡度和支护桩悬臂高度两个变量的方法,达到提高土方开挖效率的目的。文章为半逆作法盆式开挖施工中支护桩悬臂高度和预留土体边坡坡度提供了一种有效的分析方法。
Using slope control to calculate the internal force, deformation and strain of soil slope reserved by basin excavation and the method of calculating the internal force and deformation of the basin-type excavation and retaining pile with the control of slope and cantilever height, Two-dimensional finite element analysis was carried out on the basin excavation with different slopes reserved for soil and cantilever height of different supporting piles. Under the condition of ensuring the stability of the foundation pit, the purpose of improving the excavation efficiency of earthwork is achieved by separately controlling the two variables of retaining the slope of the soil body and the cantilever height of the support pile. The article provides an effective method for analyzing the cantilever height of supporting pile and the reserved slope of soil slope in the semi-reverse method of basin excavation.