Geotechnical Characteristics and Stability Analysis of Rock-Soil Aggregate Slope at the Gushui Hydropower Station, Southwest China

Table 3

Some cohesion and friction angle values for rock-soil aggregate in China [20–22].

Location (position, province)	Cohesion (kPa)	Friction angle (°)	Material characteristics
Xiaowan, Yunnan	50.0	36.0	Mixture of rock block, boulders, and gravel soil; rock content is approximately 32%; rock diameter is 30–350 mm.
Hutiao Valley, Yunnan	12.6	36.5	Mixture of broken stone and rock block; rock content is approximately 46%; rock diameter is 0.1–1.0 m.
Lancang River, Yunnan	48.0	35.0	Mixture of broken stone, rock block, boulders, and silt; rock content is 20%–35%; rock diameter is 0.3–5.0 m, dense structure.
Qingshui River (no. 1), Yunnan	35.0	31.0	Clay cementation of pebble and basalt block.
Qingshui River (no. 2), Yunnan	65.0	30.0	Calcarenite and clay filling of broken stone and sandstone block.
Unknown slope (no. 2), Yunnan	60.0	35.0	Mixture of slate block, limestone block, and clay; rock diameter is 30–80 mm, loose structure.
Liangjiaren, Yunnan	40.0	29.0	An ice-water deposit, mixture of broken stone, boulders, and silt; rock content is 25%–35%.
	18.0	19.0	An ice-water deposit, mixture of broken stone, rock block, and silt; rock content is 25%–35%.
Qianjiangping slope, Hubei	23.0	20.0	Mixture of broken stone, pebble, and clay; the maximum of rock block diameter is 1.5 m; pebble diameter is 30–100 mm.
Baiyiyan, Hubei	47.9	33.8	Calcarenite and sandy soil filling of broken stone.
	55.5	35.4	Mixture of limestone block, sandstone block, and clay.
Huangshi, Hubei	50.0	40.0	Mixture of limestone block, sandstone block, and clay.
	30.0	32.8	Mixture of breccia block, limestone block, and clay.
Yunyang, Chongqing	26.3	13.3	Mixture of sandstone block, broken pebble, and silty clay; rock content is approximately 20%; rock diameter is 2–20 mm.
Fengjie, Chongqing	42.6	26.4	Mixture of broken stone and clay; rock content is approximately 15%; rock diameter is 10–20 mm.
	94.6	28.8	Mixture of breccia block, broken stone, and clay; rock content is approximately 55%; rock diameter is 30–50 mm.
Anle, Chongqing	55.0	32.0	Mixture of broken stone, sandstone block, and sandy clay; rock diameter is 100–800 mm, talus type.
	38.0	25.0	Mixture of pebble and sandy soil; rock diameter is 20–80 mm, alluvium type.
Three Gorges reservoir, Chongqing	25.0	30.0	Mixture of rock block and silty clay.
Dashiban, Sichuan	25.0	13.2	Mixture of rock block and clay; rock content is 25%–35%.
Jinsha River, Sichuan	48.0	39.0	Mixture of limestone block, pebble, and clay; the maximum rock diameter is approximately 4 m.
Feishuiya, Sichuan	60.0	38.6	Mixture of limestone block, sandstone block, and clay.
Xiaoliang Mountain, Sichuan	65.0	31.4	Mixture of pebble and sandy clay.
Dahaizi, Sichuan	36.0	33.0	Mixture of broken stone and sandy soil.
Baishuizhai, Sichuan	37.2	23.1	Mixture of limestone block, phyllite block, and clay.
	46.5	28.0	Mixture of limestone block and sandy soil, dense structure.
Jinsha reservoir, Sichuan	30.0	17.0	Mixture of broken stone, sandstone block, and silty clay.
Yalong River, Sichuan	60.0	35.0	Mixture of broken stone, sandstone block, and clay; rock content is approximately 30%; rock diameter is 400–1000 mm.
Shiwan, Sichuan	10.0	25.4	Mixture of pebble, granite block, and clay; rock diameter is 40–150 mm.
Unknown slope, Jiangxi	10.0	25.0	Mixture of rock block and clay.