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

Table 2

Strut properties (steel and aluminum) of trench box shield protection used for FE modelling in PLAXIS-3D.

Parameter/property	PLAXIS nomenclature	Steel strut			Aluminum strut
		200 mm (8 in. )	100 mm (4 in. )	50 mm (2 in. )	200 mm (8 in. )	100 mm (4 in. )	50 mm (2 in. )
Material type	Type	Elastic	Elastic	Elastic	Elastic	Elastic	Elastic
Young’s modulus	E1 or E2 (kN/m^2)
Unit weight	(kN/m^3)	78.50	78.50	78.50	26.99	26.99	26.99
Cross-sectional area	(m^2)	0.01	0.0028	0.0010	0.01	0.0028	0.001
Moment of inertia	(m^4)
	(m^4)
Poisson’s ratio		0.3	0.3	0.3	0.3	0.3	0.3
200 mm strut (SCH80)	Outer diameter strut, do (mm)	215	112	60	215	112	60
	Inner diameter strut, di (mm)	190	95	48	190	95	48
	Area of strut (m^2)
	or for strut (m^4)

One shield geometry;  m (10 ft);  m (10 ft); horizontal distance between  m (104 in.).