芜申线（高溧段）航道杨家湾船闸防洪堤滑坡原因分析

摘要

针对芜申线（高溧段）航道杨家湾船闸防洪堤滑坡问题，根据防洪堤地基工程地质特性、滑坡情况及其工程段有关历史情况确定滑坡产生原因分别为设计时未进行土体抗滑验算、地基土存在薄弱层且加固处理不到位、长时间降雨、施工速度过快以及监测人员未及时分析监测变形数据。由安全系数计算结果确定未加固处理的地基土薄弱层是导致船闸防洪堤产生滑坡的主要原因。%According to the landslide of Yangjiawan lock levees ,the geo-engineering properties ,landslide status and its historical circumstance in engineering section are discussed in this article .It is determined from the discussion that the unfavorable factors resucting in the landslide are as follows :the simulative calculation of soil sliding being ignored ,the soft soil layer in the foundation being not effectively treated ,the long-time rainfall ,the more quick construction speed as well as the deformation monitoring data being not proceeded in time .Finally ,the key factor resulting in the levee land-slide is determined as the existence of the weak layer in soft soil foundation .