The reinforcement project of Shanghai-Kunming Railway is located in K698 + 440 ~ K699 + 350. At May 23, 2010, there was a K859 train derailment accident caused by a terrible flood in a century because the landslides of the left of Shanghai-Kunming Railway formed debris flow and rushed into the railway line. The landslides was about 8000m³. Emergency reinforcement project was demanded to clear the landslide immediately and reinforce the mountain slope and railway with self drilling rock bolt.
The mountain slope of landslides, lying right low left high and having a big undulation, has a good slope vegetation development. Its ground elevation is 60 ~ 200m, relative height is 140m, and the natural slopes is 25 to 45 degrees. Using self drilling rock bolt to reinforce, the anchor OD is 32mm; wall thickness≥5mm; ultimate tensile strength of self drilling rock bolt≥280kn; drill bit diameter ≥ 50 mm; diameter of bores≥80mm; length of self drilling rock bolt used in slope≥12m; Vertical and horizontal spacing used plum-shaped layout about 2.5m; and downward inclination of self drilling rock bolt used in slope is 20 degrees. Click here and learn more.