A multistory building with a basement is to be constructed. The top 4 m consists of loose silt, below which dense sand layer is present up to a great depth. Ground water table is at the surface. Thefoundation consist of the basement slab of 6m width which will rest on the top of dense sand as shown in the figure. For dense sand, saturated unit weight = 20 kN/m³, and bearing capacity factors N₁ =40 and Ng = 45. For loose silt, saturated unit weight = 18 kN/m³, No = 15 and Ng = 20. Effective cohesion c c is zero for both soils. Unit weight of water is 9.81 kN/m³. Neglect shape factor and depthfactor.Average elastic modulus E and Poisson's ratio m of dense sand is 60 x 103 kN/m² and 0.3 respectively.yGround surfaceXXXLoose silt4 mkBasementFoundation slab6mDense sand»XXXLoose siltThe foundation slab is subjected to vertical downward stresses equal to net safe bearing capacity derive in the above question. Using influence factor l = 2.0, and neglecting embedment depthand rigidity corrections, the immediate settlement of the dense sand layer will be:

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ory building with a basement is to be constructed. The top 4 m consists of loose silt, below which dense sand layer is present up to a great depth. Gr n consist of the basement slab of 6m width which will rest on the top of dense sand as shown in the figure. For dense sand, saturated unit weight = = 45. For loose silt, saturated unit weight = 18 kN/m³, No = 15 and Ng = 20. Effective cohesion c c is zero for both soils. Unit weight of water is 9.811 elastic modulus E and Poisson's ratio m of dense sand is 60 x 103 kN/m² and 0.3 respectively. d surface ilt 4m Basement Foundation slab 6 m Dense sand Y XXX Loose silt

ory building with a basement is to be constructed. The top 4 m consists of loose silt, below which dense sand layer is present up to a great depth. Gr n consist of the basement slab of 6m width which will rest on the top of dense sand as shown in the figure. For dense sand, saturated unit weight = = 45. For loose silt, saturated unit weight = 18 kN/m³, No = 15 and Ng = 20. Effective cohesion c c is zero for both soils. Unit weight of water is 9.811 elastic modulus E and Poisson's ratio m of dense sand is 60 x 103 kN/m² and 0.3 respectively. d surface ilt 4m Basement Foundation slab 6 m Dense sand Y XXX Loose silt

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Civil Engineering A multistory building with a basement is to be constructed. The top 4 m consists of loose silt, below which dense sand layer is present up to a great depth. Ground water table is at the surface. The foundation consist of the basement slab of 6m width which will rest on the top of dense sand as shown in the figure. For dense sand, saturated unit weight = 20 kN/m³, and bearing capacity factors Na 40 and Ng = 45. For loose silt, saturated unit weight = 18 kN/m³, Ng = 15 and Ng = 20. Effective cohesion c ¢ is zero for both soils. Unit weight of water is 9.81 kN/m³. Neglect shape factor and depth factor. Average elastic modulus E and Poisson's ratio m of dense sand is 60 x 103 kN/m2 and 0.3 respectively. 17 Ground surface XXX Loose silt 4 m Basement Foundation slab 6 m Dense sand Loose silt The foundation slab is subjected to vertical downward stresses equal to net safe bearing capacity derive in the above question. Using influence factor If = 2.0, and neglecting embedment…
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