An anchored sheet pile wall is designed to provide support for an excavation of depth 4m....

 

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An anchored sheet pile wall is designed to provide support for an excavation of depth 4m. The anchor tie is to be attached at a point ho below ground level. The unit weight and effective shear strength parameters of the soil and a geometrical representation of the problem are shown in Figure Q2.1. Consider the soil below the Water Table (W.T.) to be submerged (at both sides of the embedded wall) and dry above the W.T. Using the free earth support method, answer the following questions: (a) Considering a theoretical depth of embedment d, draw the vertical and horizontal stress distributions on both sides of the wall for a surcharge on the passive side of value q = 2kN/m². [10 marks] (b) Disregard calculations in (a) and for an embedded wall of total height 7.5m (d = 3.5m) and an anchor capable of resisting a maximum load of 90kN/m, compute the value of h, and the surcharge q. [10 marks] (c) From (b), compute the maximum bending moment in the embedded wall within the interval defined by ze [ho,4]. [5 marks] W.T.T ♥ 9 4m Tie rod Sheet pile wall Figure Q2.1 (not to scale) ho Ground level W.T. Z c' = 0 [kPa] o'=15° Ya = 20 [kN/m³] Ysat = 25 [kN/m³] An anchored sheet pile wall is designed to provide support for an excavation of depth 4m. The anchor tie is to be attached at a point ho below ground level. The unit weight and effective shear strength parameters of the soil and a geometrical representation of the problem are shown in Figure Q2.1. Consider the soil below the Water Table (W.T.) to be submerged (at both sides of the embedded wall) and dry above the W.T. Using the free earth support method, answer the following questions: (a) Considering a theoretical depth of embedment d, draw the vertical and horizontal stress distributions on both sides of the wall for a surcharge on the passive side of value q = 2kN/m². [10 marks] (b) Disregard calculations in (a) and for an embedded wall of total height 7.5m (d = 3.5m) and an anchor capable of resisting a maximum load of 90kN/m, compute the value of h, and the surcharge q. [10 marks] (c) From (b), compute the maximum bending moment in the embedded wall within the interval defined by ze [ho,4]. [5 marks] W.T.T ♥ 9 4m Tie rod Sheet pile wall Figure Q2.1 (not to scale) ho Ground level W.T. Z c' = 0 [kPa] o'=15° Ya = 20 [kN/m³] Ysat = 25 [kN/m³]