A square footing 3 m by 3 m supports a building column load that results in a foundation bearing pressure of 200 kPa. The deep sand stratum underlying the foundation has an average unit weight of 17.0 kN/m3 and is classified as medium-dense. Use the subgrade reaction method to estimate the foundation settlement.

A square footing 3 m by 3 m supports a building column load that results in a foundation bearing pressure of 200 kPa. The deep sand stratum underlying the foundation has an average unit weight of 17.0 kN/m3 and is classified as medium-dense. Use the subgrade reaction method to estimate the foundation settlement.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Mat Foundations

Section: Chapter Questions

Problem 10.8P

See similar textbooks

Similar questions

Calculate the soil volume distortion settlement under the center of a 2-m-wide strip foundation (flexible type) which carries a loading of 400 kN per meter of wall length. The foundation bears on a saturated clay stratum (cohesion c is 75 kPa) that is 10 m deep. Rock underlies the clay.
A 300 mm 450 mm plate was used in carrying out a plate loading test in a sand, during which the plate settled 5 mm under the applied pressure of 250 kN/m2. a. What is the coefficient of subgrade reaction for a 300 mm wide square plate? b. What would be the coefficient of subgrade reaction of a 2 m 3 m foundation?
A rectangular footing 6 x 3 m carries a uniform pressure of 300 kN/m2 on the surface of a soil mass. Determine the vertical stress at a depth of 4.5 m below the surface on the center line 1.0 m inside the long edge of the foundation.
A square footing foundation, 3 m by 3 m, and positioned on the ground surface of a soil deposit, supports a column load of 1,350 kN. Determine the vertical stress resulting from the foundation loading at a depth 3 m below the base of the footing for locations beneath the center and beneath the edge, assuming:(a) Boussinesq conditions apply.(b) Westergaard conditions apply.
A 6 m. x 9 m. rectangular foundation carrying a uniform load of 288 kPa is applied to the ground surface. Compute the total vertical stress in kPa due to this uniform load at a depth of 6 m. below the center of the loaded area if unit weight of soil is 18,30 kN/m.
For a normally consolidated clay layer, given:Thickness = 3.7 mVoid ratio = 0.82Liquid limit = 42Average effective stress on the clay layer 5 110 kN/m2 How much consolidation settlement would the clay undergo if the average effective stress on the clay layer is increased to 155 kN/m2 as the result of the construction of a foundation?
A mat foundation, 15 m x 15 m, is made of reinforced concrete and to be supported by a three-layer soil profile, as shown. The mat is 1 m thick, and the average stress on the surface of the slab assessed from the structural engineering analysis is 75 kPa. (Unit weight of concrete = 23.58 kN/m^3) The 5-m thick sand layer immediately below the mat foundation has been compacted to standard Proctor specifications, most likely to optimum moisture content, which is why its moist density is given. (A) Determine the pre-construction effective stress at Point A (bottom of the clay layer). This is the in situ effective stress (overburden pressure) measured from the ground surface prior to the placement of the mat foundation. (B) Determine the vertical stress increase induced by the mat foundation at Point A using the “Influence Chart,” commonly referred to as the “Spider Web.” (C) Determine the vertical stress increase induced by the mat foundation at Point A using the “Stress Isobars.” (D)…
a 6m square foundation exerts a uniform pressure of 300kPa on a soil.Determine a.vertical stress increments due to the foundation load to a depth of 10m below its center
A planned construction site is underlain by a thick deposit of normally consolidated clay soil. A building foundation 6 ft square will be located on the ground surface and carry a total loading of 180,000 lb. Determine the foundation settlement (beneath center) by analyzing the volume changes due to primary compression in layers that are 2, 4, and 6 ft thick, respectively, from the foundation level downward. For simplification, assume a soil unit weight of 115 pcf constant with depth, an inplace void ratio of 1.05, and a compressio index of 0.35 for each layer analyzed. Use Boussinesq conditions.
2.An oil storage tank 35 m in diameter is located 2 m below the surface of a deposit of clay 32 m thick, the water table being at the surface: the net foundation pressure is 105 kN/m2. A firm stratum underlies the clay. The average value of mv for the clay is 0.14 m^2/MN and that of pore pressure coefficient A is 0.65. The undrained value of Young’s modulus is estimated to be 40 MN/m^2 Determine the total settlement under the centre of the tank.
An oil storage tank 35min diameter is located 2m below the surface of a deposit of clay 32mthick, which overliesa firm stratum, as shown in the scheme below. The net foundation pressures at the foundation level equal105 kN/m2. The average values of mv and pore pressure coefficient A for the clay are 0.14 m2/MN and 0.65,respectively. The undrained value of Young’s modulus is estimated to be 40 MN/m2. Determine the total settlement(excluding settlement due to secondary compression or creep) under the centre of the tank.
A circular footing 3 m in diameter applies a uniform surface pressure of 150 kPa. Determine the vertical stress increase beneath the center at 2 m deep from the ground level.