Characteristics and Evolution Process of Lianshan Landslide in Pingxing Town,Shizhong District,Leshan City
In August 2020,the Shizhong District of Leshan City dropped heavy rain,with the maximum rain intensity of more than 50mm/h from 11 o'clock on the 17th to 2 o'clock on the 18th,forming a once-in-a-century flood-"8.18 flood".Affected by this,Pingxing Town Sansheng Village 11 Lianshan Huangyong's house on the east side of the mountain landslide.A massive landslide occurred on the Pingxing town Sansheng Village 11 group,near the Lianshan Huangyong's house east side of mountain.Through UAV aerial photography,field mapping and engineering geological exploration,the landslide morphology and deformation characteristics,rock and soil structure,deformation process and formation mechanism are analyzed.It is concluded that the sliding deformation failure under the action of uplift pressure of groundwater goes through the initial creep deformation period,the constant velocity change slip period,the accelerated deformation slide surface through the rapid slip period,and the stop slip period.The stage of landslide deformation is accompanied by groundwater uplift pressure.The results can be used as reference for the study on the instability mechanism of similar near-horizontal strata flattening landslides in Sichuan basin.
horizontal thrust landslidegenesis mechanismdamage modepush type
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