Abstract: To ensure the safe operation of the high-speed railway, the slope stability between Station DK187+000.00 and DK187+315.00 on the right side of the Chengde South Railway Station of Beijing-Shenyang passenger special line is analyzed as a case history. The slope stability mitigation measures were compared, analyzed. The cut slope deformation during the construction was also monitored. The results show that, under natural conditions, the retaining structure for the slope produced small local slippage, which was mainly concentrated at about 10m from the top of the steep wall, with a thickness of 2 ~ 3m, and mainly accumulated in the middle of the slope body. The deformation tended to be stable when the slope angle reached 33°. Under the condition of the rainfall and the earthquake, the upper part of the slope collapses about 20m away from the top of the slope, and the thickest part reaches 3-5m. The slope deformation mainly accumulated at the foot of the slope, and they tended to be stable when the slope angle reached 28°. Throughout the comparison and selection, the loose slope deposits of the slope were removed, and all the strongly to completely weathered bedrock were removed and supported. The angle of the side slope was controlled in the range of 1V:1H to 1V:1.5H. The platform was set every 8m of the slope height, and the width of the platform was determined to be 2m. The excavation of the lower mountain has some influence on the unloading and deformation of the upper part.

Key words: igh Slope, Slope Stability, Retaining Structure, Construction Monitoring