Numerical Simulation and Optimization Design of End-Suspended Pile Support for Soil-Rock Composite Foundation Pit

Table 2

Physical and mechanical parameters of rock and soil.

Soil quality	Natural heavy “” (kN/m^3)	Elastic modulus E (MPa)	Poisson's ratio	Internal friction angle (°)	Cohesion c (kPa)	Dilatancy angle (°)
① Miscellaneous fill	19.4	10	0.28	10	20	0
② Crushed stone	20.8	35	0.30	35	5	5
③ Silty clay	18.5	13	0.32	15	36	0
④ Crushed stone	19.2	40	0.30	35	5	5
⑤ Strongly weathered mudstone	27.0	450	0.30	23	90	0
⑥ Moderately weathered limestone	27.2	2.0 × 103	0.30	45	300	15