IOP Conference Series: Earth and Environmental Science | 2021
Technical Use and Mechanical Properties of Landslide Gravel in Three Gorges Reservoir
Abstract
The main treatment of the Wanzhou drawdown area in the Three Gorges Reservoir involving landslide and reservoir bank treatment is conductedA comprehensive treatment of Wanzhou drawdown area in Three Gorges Reservoir involving landslide and reservoir bank treatment is conducted. The slope cutting improves the stability of landslides in conditions of periodic water level fluctuation, and when excavated gravel is used as the filler for reservoir bank treatment, it satisfies the ecological requirements of earthwork balance. Two kinds of landslide gravel collected for treatment were subjected to a series of tests, including particle analysis, heavy compaction, and a large-scale triaxial compress, and the engineering utilization control conditions and mechanical properties were obtained. The results show that the coarse particles content of landslide gravel is high, while the viscous is a little strong. Completed relations of water content ω and dry density ρ d are obtained by heavy compaction tests, and for K = 0.93, internal friction angles (ϕ) obtained by consolidated drained (CD) and consolidated undrained (CU) triaxial test are 21.9°∼22.4° and 18.2°∼19.1° respectively.