Example 5.2: Design Example of a Square Foundation for a Colum Figure A.3a shows a square column foundation with the followin conditions: Live load=L=675 kN Dead load D= 1125 kN Allowable gross soil-bearing capacity 145 kN/m² Column size-0.5 m x 0.5 m -20.68 MN/m² 1,413.7 MN/m² Let it be required to design the column foundation. 1.25m-D L-675 AN D-1125 AN (a) Column section- 05 m x 0.5m

Problem.№₂3 - The plan of a mat foundation is shown in Figure. Calculate the soil pressure at points A, B, C, D, E, and F. (Note: All column sections are planned to be 0.5 m 3 0.5 m.) All loads shown are factored loads according to ACI 381-11 (2011). 550 KN 2000 KN 5.25 m 2000 KN 550 kN F *K 0.25 m G H 10 m ! B i 660 kN 2000 KN 10 m 2000 KN 660 kN E 600 KN 1600 KN 5.25 m 10 m 1600 KN 470 kN C D *K 0.25 m 9 m 9 m 9 m 0.25 m 0.25 m

Refer to Figure 7.1. A flexible foundation measuring 1.5 m x 3 m is supported by a saturated clay. Given: Df = 1.2 m, H = 3 m, Es (clay) = 600 kN/m2, and qo = 150 kN/m2. Determine the average elastic settlement of the foundation.

For the mat foundation shown below (Fig. 4), the qnet(all) for the soil is 75 kN/m². The column loads and dimensions are given below: 5. Interior Columns Edge Columns Corner Columns Column Dimensions (cm x cm) 60 х 60 60 x 40 40 x 40 Service Loads, kN 1800 1200 600 a. Find out the maximum soil pressure and check the adequacy of the foundation. b. If the foundation is not adequate, what you can do to make it adequate? c. Draw the shear force and bending moment diagram for the strip ABCD. 5 m 8 m В 5 m 8 m 4 m ID 2 m Fig. 4