Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 10, Problem 10.2P
To determine
Find the value of
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Design of Shallow Footing
Question: (See photo)
Note: Avoid rounding off values in the course of solution proper as much as possible.
Q1. A square footing is located in a dense sand at a depth of 2.80 m. Determine the ultimate bearing capacity for the following water table positions.
a. At ground surface
b. At footing level
c. At 1.5 m below the footing.
Footung size=2.5m
moist unit wight = 20.5Kn/m3
saturated unit weight=21.5Kn/m3
Nc=51.7
Nq=33.8
Ny(Gama)=36.5
Q2.
a) A 2 mx 2 m square footing is subjected to an axial load of 600 kN and a bending moment of 180
kNm as appears in Figure 2. The footing is located at 1.2 m deep in a cohesionless soil that has a
friction angle of 35° and a saturated unit weight of 18.4 kN/m³. The water table is 2.7 m below the
soil surface. Calculate the following,
(i) Calculate the eccentricity of the load,
(ii) Calculate and draw the soil contact pressure beneath the footing,
(iii) Determine the factor of safety of the footing against the bearing capacity (use the general
Meyerhof, bearing capacity equation).
Assume the soil above water table is saturated.
-600 KN
/sat = 18.4 kN/m³
1.2 m
c'= 0 kPa, o'= 35°
1.5 m
DI.
2 m
M = 180 kNm
Figure 2
Chapter 10 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 10 - Refer to the rectangular combined footing in...Ch. 10 - Prob. 10.2PCh. 10 - Prob. 10.3PCh. 10 - Prob. 10.4PCh. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - A plate loading test was carried out on a medium...Ch. 10 - A 300 mm 450 mm plate was used in carrying out a...
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- Refer 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_forwardDesign of Shallow Footing Question: (see photo) Note: Avoid rounding off values in the course of solution proper as much as possible.arrow_forwardThe soil arrangement shown carries 1.76 meter square footing with a column load of 583 kN. properties of sand: Above water table = 17.54 kN/m3, below water table = 18.51 kN/m3. Properties of clay: 17.03 kN/m3, Cc = 0.382, void ratio = 0.65. Use H1 = 6m, H2= 4m, H3 = 4m, Df = 1m. Determine the settlement of the normally consolidated clay in mm. Round off to three decimal places.arrow_forward
- A rectangular footing 3m x 2m exerts a pressure of 100kN/m2on a cohesive soil Es= 5x104 kN/m2and µ = 0.5. Estimate the immediatesettlement at the centre, assuming(a) the footing is flexible (b) the footing is rigid (ii) Write about influence of water table in determination of bearing capacity.arrow_forward15 The soil arrangement shown carries 1.88-meter square footing with a column load of 596 kN. Properties of sand: Above water table = 17.04 kN/m3, Below water table = 18.19 kN/m3. Properties of clay: 17.10 kN/m3, Cc = 0.383, void ratio = 0.65. Use H1 = 6 m., H2 = 7 m., H3 = 5 m., Df = 1 m. Determine the settlement of the normally consolidated clay in mm. Round off to three decimal places.arrow_forwardCEN-333 Geotechnicalarrow_forward
- Determine the Max net soil pressurearrow_forwardFoundation, engg.arrow_forwardThe soil arrangement shown carries 1.88-meter square footing with a column load of 596 kN. Properties of sand: Above water table = 17.04 kN/m3, Below water table = 18.19 kN/m3. Properties of clay: 17.10 kN/m3, Cc = 0.383, void ratio = 0.65. Use H1 = 6 m., H2 = 7 m., H3 = 5 m., Df = 1 m. Determine the settlement of the normally consolidated clay in mm. Round off to three decimal places.arrow_forward
- Q: VERTICAL STRESS INCREMENT UNDER CORNER OF RECTANGULAR FOOTING Ex1: A footing is uniformly loaded with q = 100 kN/m2 as shown in the figure. Compute the vertical stress increments under Points A, B, and C at z = 10 m. 13.5 m 7.0 m Footing 12 m (Plane view) 6.0 marrow_forwardA 2.0 m x 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry acolumn load Q. The depth of the footing is 1.0 m. The soil parameters are: c’= 0, ϕ’= 26º, γ =19kN/m3, and cu = 60 kN/m2. Determine the maximum possible value for Q, considering short-termand long-term stability of the footingarrow_forwardM Im QUESTION 2: Check if the base area of 2m x 2m is adequate for the footing under the loading shown in the figure. Allowable soil pressure is 0.25 MPa. N=900 KN M=150 kNm H=75 KNarrow_forward
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