Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Chapter 3, Problem 3.15QPP
A footing with an embedment of 2 m is embedded in a sand with a unit weight of
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A square footing 5 ft by 5 ft supported on a sandy stratum is designed to carry a column loading of 250,000 lb. The unit weight of the sands underlying the footing location vary between 120 and 125 pcf. Estimate the foundation settlement to be expected using the subgrade reaction method. (Neglect the weight of the footing.)
Calculate the size of a square footing on a soil profile consisting of a medium-densesand layer with constant N values, N60 = 30. The dead load is 500 kN and the live load is200 kN. The footing is embedded 1 m into the sand. Groundwater is 2 m below thesurface. Consider that allwable settlement is 25 mm.
A
strip footing
10 ft
wide
is
loaded
on the
ground surface with
a
pressure equal
to
4177
lb/ft
2
.
Calculate vertical stresses
at
depths
of 3, 6, and 12 ft
under
the
center
of
The footing?
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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- A 1.8 m square, 2 m deep footing supports a service load of 570 kN. It is supported on a clayey sand. A dilatometer test run at the site has returned the following modulus profile. Compute the footing settlement.arrow_forwardDefine Load-Settlement Response of Footing on Sand ?arrow_forwardA long strip footing 3.5 ft wide is to be used to support a masonry bearing wall for a building. The subsurface investigation indicates that the soil at the site is a clay with a unit weight of 110 pcf and a cohesion, c, of 1,200 psf. The angle of internal friction is zero. The clay has a rigidity index of 10. The foundation is constructed 3 ft below the ground surface, and the soil backfill is well compacted. Using a factor of safety of 3, what maximum load should the foundation be designed to support per foot of wall length?arrow_forward
- A square footing (2mx2m) will carry gross load of 650 kN. Determine the increase in vertical stress 4 m. below the center of the footing.arrow_forwardA 3 ft square footing carries a sustained load of 10 k. It is placed on the surface of a 30 ft thicksaturated overconsolidated clay underlain by dense sand. Based on laboratory tests, the clay can be adequately modeled using the e@log@p method. The laboratory tests provide the follow-ing compressibility information for the clay: g = 123 lb/ft3Cc1 + e0= 0.06Cr1 + e0= 0.002sm′ = 900 lb/ft2 The groundwater table is located at the ground surface. Compute the settlement of the footing.arrow_forwardIn footing design, what will happen if P/A exceeds M/S?arrow_forward
- A rectangular footing with dimensions of 8ft x 12ft is constructed at the surface of the ground and supports a column with a load of 192,000 lbs. The load applied to the footing results in a uniform stress distribution at the base of the footing. What is the change in vertical stress 12 feet below the ground, underneath Point A, at the corner, on the diagram?arrow_forwardA 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing is 1.0 m. The soil parameters are: c = 0, = 26, = 19 kN/m3, and cu = 60 kN/m2. Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.arrow_forwardRefer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The distance between the two column loads L3 = 13.5 ft. The proximity of the property line at the left edge requires that L2 = 3.0 ft. The net allowable soil pressure is 2500 lb/ft2. Determine the breadth and length of a rectangular combined footing.arrow_forward
- A 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing is 1.0 m. The soil parameters are: c = 0, =26, = 19 kN/m3, cu = 60 kN/m2 (=0 condition). Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.arrow_forwardA circular footing of 10 m dia for a column is 10 resting on ground surface. Failure occurred at aload of 1500 T. If the soil is purely clay, find out the cohesive strength of the soil.arrow_forwardFor a construction project, the ground surface at a building location is lowered 5 ft. A 4-ft square footing (4 ft by 4 ft) imposing a bearing pressure of 4,000 psf is then constructed at the level of the new surface. What net stress increase results in the soil mass 4 ft below the center of the foundation? Assume that the soil unit weight is 120 pcf.arrow_forward
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