Multipotential Surface Elastoplastic Constitutive Model and Its Application in the Analysis of the Phase II Cofferdam of the Three Gorges Project

Table 2

Parameters of the Duncan-Chang model.

Materials	(t/m^3)	(°)	(t/m^2)
Stone ballast	1.99	38.5	10	650	0.34	0.8	0.37	2.70	0.30
Weathered sand	1.85	33.5	0	230	0.42	0.72	0.4	4.0	0.1
Filter material	1.95	38.5	0	500	0.73	0.86	0.40	4.30	0
Fine sand layer	1.84	37.0	2.0	420	0.44	0.80	0.30	7.90	0.15
Sandy gravel layer	2.23	40.0	0	800	0.4	0.8	0.36	1.45	0.15
Downstream antiseepage walls	2.15	34.3	128	12583	0.169	0.471	0.154	44.75	-0.427
Upstream antiseepage walls	2.15	34	178	12351	0.2864	0.336	0.2399	44.22	-0.105