STUDY ON ENGINEERING-GEOLOGICAL CONDITIONS FOR LANDSLIDE AT BADU K343 SECTION NANKUN RAILWAY AND CONTROL ON IT

An integrated geological and geophysical investigation suggests that the landslide at Badu K343 occurred because the top of strong weathering zone on sandstone is rich in kaolin and other minerals which became liguid layer by water saturation after torrential rain and caused the weathering zone and loose sediments to undergo gravity instability. The landslide body is about 20 m in thickness, 30 thousand m 2 in cover area, and 600 thousand m 3 in the slip volume. Based on the investigation of geological conditions, a proposal on building of piles and ditches for control on the landslide is suggested.