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根据横跨四川、云南、重庆、贵州、甘肃、西藏等省,50条输电线路工程157例塔位工程处理案例的统计结果,近一半的塔位工程地质问题是由土质滑坡引起的。在对土质滑坡发生的时间统计后发现,其主要发生于6~10月份,占总滑坡数的80.7%。6~10月刚好是我国西南地区降雨集中时间段。由此可证实,降雨是土质滑坡发生的主导诱因。介于上述原因,该文采用Geo-Studio软件中SEEP/W模块,以四川省某典型滑坡为例,对持续降雨条件下,滑坡体内二维渗流场进行了数值模拟,分析持续降雨条件下,土质坡体失稳破坏的机理。
According to the statistics of 157 cases of tower project handling 50 transmission lines across Sichuan, Yunnan, Chongqing, Guizhou, Gansu and Tibet provinces, nearly half of the engineering problems in the tower are caused by soil landslides. Statistics on the time of landslide occurred found that it mainly occurred from June to October, accounting for 80.7% of the total number of landslides. From June to October it is just the time when rainfall concentrated in southwest China. It can be confirmed that rainfall is the leading cause of soil landslides. Due to the above reasons, this paper uses the SEEP / W module in Geo-Studio software to take a typical landslide in Sichuan as an example to simulate the two-dimensional seepage field in a landslide under continuous rainfall conditions. Under continuous rainfall conditions, The mechanism of instability damage of soil slope.