Soil-Structure Interaction of Flexible Temporary Trench Box: Parametric Studies Using 3D FE Modelling

Table 3

Soil properties for sensitive blue clay, till, and dry and wet sand model parameters used for FE modelling in PLAXIS-3D.

Parameter/property	PLAXIS nomenclature	Sensitive blue clay	Till	Dry sand, medium density	Wet sand, medium density
Depth of layer	m	0.0–15	0.0–15	0.0–15	0.0–15
Material model	Model	MC	MC	MC	MC
Drainage type	Type	Undrained	Drained	Drained	Drained
Unit wt. above phreatic level	(kN/m^3)	16	21.5	19.5	19.5
Unit wt. below phreatic level	(kN/m^3)	17	—	—	19.5
Maximum elastic/shear modulus	/ (kN/m^2)	( as per Equation (1))	( as per Equation (2))	( as per Eq. (2))	( as per Equation (2))
	—	—	70	52	52
Cohesion	(kN/m^2)	See Table 4	5	5	5
Frictional angle	(° (degree))	See Table 4	42	35	35
Dilatancy angle	(° (degree))	0	0	0	0
Poisson’s ratio		0.3	0.3	0.3	0.3
Interface strength reduction factor		0.5	0.65	0.65	0.65
Initial determination		0.53	1.0	0.43	0.43
Soil type		Very fine
<2 μm	%	74	10	10	10
2 μm–50 μm	%	11	13	13	13