摘要
上海某轨道交通盾构顶进时下穿一高架桥梁,穿越断面与一桥梁桩基相交,因此须将影响盾构推进的桩基拔除。利用弹塑性有限元,分析全回转钻机清除桩基及孔洞回填对已建污水总管的影响,在预计的挤土效应内,污水总管的位移跟套管挤土位移基本呈线性关系,孔洞回填使污水管位移有所恢复,污水管最大位移在套筒挤土过程中产生。
By using elastic-plastic finite element method, the article analyses the impact on a built waste main caused by removing pile foundation and backfilling the pile holes with a full-rotating drilling rig. The displacements of the waste main possessed mainly a linear relationship with casing squeezing displacements within the predicted squeezing effect. And the displacements of the waste main obtained some recovery during backfilling the pile holes. The maximum displacements of the waste main occurred during the process of soil squeezed by casing.
出处
《都市快轨交通》
2009年第1期55-57,共3页
Urban Rapid Rail Transit
关键词
拔桩
全回转钻机
有限元
挤土效应
pile pulling
full-rotating drilling rig
finite element
squeezing effect
