Early Warning Model of Sports Landslide Based on Deformation Monitoring

It is difficult to perform early warning of sports landslide between the creep deformation stage and the severe deformation stage,because the deformation time is long and the mechanism is complicated.The cumulative displacement-time relationship of typical sports landslides are introduced,the precautionary line is proposed by using daily rainfall and daily displacement rate,and the progressive landslide disaster warning system is designed.Taking the Wangjiapo landslide as an example,combined with information related to landform,profile and deformation,a reasonable monitoring network is established.According to the cumulative displacement-timerainfall relation curve,the deformation of the landslide is analyzed.The results show that:(1)The accumulated displacement curve has a step characteristic with rainfall;(2)The daily displacement rate increases significantly to 20 mm/d when the daily rainfall exceeds 25 mm;(3)The disaster precautionary line of the Wangjiapo landslide is designed by using 3-level warning ye