Answer Happy

The braced-cut excavation will be constructed with the sheet pile in the layered clayey soil (Fig). The following information is given: = = = • The width of the cut B = 6 m • The length of the cut L = 20 m • The height of the cut H = 8 m • For the 1st layer: H = 2m, y = 19.5 kN/m3, cu = 40 kN/m2 • For the 2nd layer: H = 3m, y = 18.5 kN/m², cu = 25 kN/m2 • For the 3rd layer: H = 3m, y = 17.5 kN/m?, cu = 30 kN/m2 • The center-to-center spacing of struts in the plan s = 5 m • The allowable flexural stress of the sheet file Oall = 180 MN/m2 = - (a) Determine the strut loads at levels A, B, and C. [14 marks] (b) Determine the sheet-pile section modulus. [12 marks] (c) Determine the factor of safety against bottom heave. [4 marks]
1 m Clay y = 19.5kN/m3 Cu = 40kN/m2 2 m = D 3 m Clay y = 18.5kN/m3 Cu = 25kN/m2 3 m = B 3 m Clay 3 m y = 17.5kN/m3 Cu = 30kN/m2 С 1 m Clay y = 17.5kN/m3 Cu = 30kN/m2 6 m