Repeat Problem 11.1 based on limit state design, using the factors given in Table 11.4. 11.1 A continuous foundation is required in a soil where d = 10 kN/m², 4' = 26°, and y = 19.0 kN/m³. The depth of the footing will be 1.0 m. The dead load and the live load are 600 kN/m and 400 kN/m, respectively. Determine the required width for the foundation based on allowable stress design with FS = 3, using Eq. (6.10) and Table 6.1.

Repeat Problem 11.1 based on limit state design, using the factors given in Table 11.4. 11.1 A continuous foundation is required in a soil where d = 10 kN/m², 4' = 26°, and y = 19.0 kN/m³. The depth of the footing will be 1.0 m. The dead load and the live load are 600 kN/m and 400 kN/m, respectively. Determine the required width for the foundation based on allowable stress design with FS = 3, using Eq. (6.10) and Table 6.1.

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter5: Ultimate Bearing Capacity Of Shallow Foundations: Special Cases

Section: Chapter Questions

Problem 5.7P

See similar textbooks

Similar questions

Consider a continuous foundation of width B = 1.4 m on a sand deposit with c = 0, = 38, and = 17.5 kN/m3. The foundation is subjected to an eccentrically inclined load (see Figure 6.33). Given: load eccentricity e = 0.15 m, Df = 1 m, and load inclination = 18. Estimate the failure load Qu(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (6.89)] b. for a reinforced type of loading [Eq. (6.90)]
Please solve this question. Q. No. 1: A foundation 4x4 m is located at a depth of 1 m in a layer of saturated clay 13 m thick. Characteristic Parameters for the clay are cu=100 kN/m2, u=0, c'=0, '=32o, Cc=0.36, eo=0.784, NCC, sat=21 kN/m3. Determine the design load of the foundation to ensure (a) a factor of safety with respect to shear failure of 3 using the traditional method, (b) consolidation settlement does not exceed 30 mm.
For the rigid shallow foundation (2*4m) shown in Fig, calculate Immediate settlement the center of the foundation if . (net pressure qo = 100 kPa. Assume 0.3 X 2 m 0.5 m 3.5 m W.T Q=2000 kN 6 m-3 m y=22 kN/m² Ce=0.805 C₁ = 0.3 e=0.753 OCR = 1.4 G. s Dense Sand Y = 22 kN/m³ Silty Clay Silty Sand Y = 18 kN/m²
A column foundation (Figure P3.5) is 3 m x 2 m in plan. Given: D; = 2 m, o' = 25°, c' = 50 kN/m². Using Eq. (3.23) and FS = 4, determine the net allowable load [see Eq. (3.15)] the foundation could carry. Use bearing capac- ity, shape, and depth factors given in Şection 3.6.
2. A square footing is proposed to be constructed on the silty sand layer as shown in Figure Q2. If the gross load (Qall) is 600 kN, check whether the foundation can carry the load or not. (Use Terzaghi's bearing capacity equation with general shear failure and FS = 3). 1.5 m 0.5 m Qall 1.2 m Silty Sand Y = 19 kN/m³ c'= 8 kN/m² = 25° Ysat 19.0 kN/m³ Figure Q2: A Square Footing Ground Water Level
A square footing is proposed to be constructed on the silty sand layer as shown in Figure Q2. If the gross load (Qall) is 600 kN, check whether the foundation can carry the load or not. (Use Terzaghi's bearing capacity equation with general shear failure and FS = 3). 2. Qall Silty Sand 1.5 m y 19 kN/m c' 8 kN/m2 = 25° Ground Water 0.5 m 1.2 m Level Kar 19.0 kN/m' Figure Q2: A Square Footing
A column foundation is 3 m × 2 m in plan. Given: Dƒ = 1.5 m, þ' = 30°, c′ = 80 kN/m². Using the general bearing capacity equation (CFEM see class slides from March 17 similar to Example 1 and 2 but with an added capacity term related to cohesion) and 0.5, determine the factored bearing capacity of the foundation (i.e. – use Þ). Use Yw = 9.81 kN/m³. For simplicity, read the values of Nc, Ną, and Ny directly from the table on page 26 of the lecture slides use the highlighted columns. Also, determine the maximum factored load for the column. - 1.5 m ↑ 1 m 3m x 2m - y = 17 kN/m³ Groundwater level Ysat = 19.5 kN/m³ =
Refer to Figure 5.2 and consider a rectangular foundation. Given: B = 1.5 m, L = 2.5 m, Df = 1.2 m, H = 0.9 m, Φ' = 40º, c' = 0, and γ = 17 kN/m3. Using a factor of safety of 3, determine the gross allowable load the foundation can carry. Use Eq. (5.3).
A 8 m layer of sand, of saturated unit weight 22 kN/m3, overlies a 6 m layer of clay, of saturated unit weight 27 kN/m3. A foundation carrying 1200 KN load is to be founded on the soil layer. If the clay is normally consolidated and the increase in effective pressure due to the foundation load at the center of clay is 27 kN/m2, Soil parameters are Cc = 0.25, eo = 1.0. Assume required data •Draw the soil profile diagram in detail, mentioning all the soil properties with the foundation details. •Calculate the consolidation settlement at the center of the clay layer.
Problem #3 lơ lag An eccentrically loaded continuous foundation is shown in (Eccentricity in one direction only) e = 0.15 m I Qall y = 17 kN/m³ c' = 0 4'= 36° the figure. Determine the maximum allowable load (Qall) 1.0 m that the foundation can carry. Use Meyerhof's effective area method and FS of 4. B = 2 m Solution: Centerline
6.7 Determine the maximum column load that can be applied on a 1.5 m x 1.5 m square foundation placed at a depth of 1.0 m within a soil, where y = 19.0 kN/m³, c' = 10 kN/m², and o'= 24°. Allow a factor of safety of 3.0.
Prob. 1) A shallow foundation shown below, with e, = 0.34 m and eB= 0.28 m. Water level is located at a depth of 0.5 m below the ground surface. Determine the allowable load, Q, with FS = 3. Sandy clay Y =18 kN/m³ Y sat =20 kN/m3 c'= 20 kN/m? 0,9 m 1.5 m x 2.0 m O'= 25° keg = 0.28 m 2.0 m e, p.34m 1.5m Prob. 2) An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface. 5 m 1H:2V 1H:2V 1H:1V 8 m Y=18 kN/m Y=18 kN/m В A Prob. 3): A circular shallow foundation has been constructed at depth Dr of 2 m. The gross allowable load with FS= 3 is 600 kN. The soil properties given as following: y= 17 kN/m', Ysat.= 21 kN/m', c'= 0 and o'= 20°. The water table located at the ground surface. Use the general bearing capacity equation to determine the size of the foundation.