Recent advances in high slope reinforcement in China: Case studies

This paper reviews a number of engineering technologies and workmanships for addressing the challenging issues concerning possible landslides in large-scale slope reinforcement projects in China. It includes: (1) the multi-point anchored piles with a depth of 64 m in the Jietai Temple rehabilitation project, (2) soil nailing strengthened by driven pipe grouting technique covering an area of 530 m × 100 m (length × height) in the Xiluodu hydropower project, (3) the cantilever piles extending vertically from the slope toe to stabilize a 300 m high slope at the Xiaowan hydropower station, (4) a new and simple workmanship for building a pile with cross-sectional area of 20 m × 5 m in the Hongjiadu hydropower station, and (5) comprehensive reinforcement scheme proposed for excavation of a 530 m high slope in Jinping I hydropower station. These new technologies can provide valuable experiences for reinforcement of high slopes of similar projects in China and other regions and countries with similar geological conditions.