Solve this using the equation for approximation.a. In footing A, compute the stress increase at thecenter of the clay layer assuming that the pressurebeneath the footing is spread at an angle of 2 verticalto 1 horizontal. (in kPa)b. Determine the size of the footing B so that thesettlement in the clay layer is the same beneathfooting A and B. footing A is 1.5x1.5. (in m)c. Determine the primary settlement for normallyconsolidated clay beneath footing A. (in mm) Two footings rest in layer of sand 2.7m thick. The bottomof the footings are 0.9m below the ground surface.Beneath the clay layer is hard pan. The water table is at adepth of 1.8m below the ground surface.P-450 kNP, = 900 kN0.90 m0.90 mY418,50 kN/m'Sand0.90 m20.80 kN/mSandy=18.80-kN/me=1.03, C,= 0.301.80 mClaySolve this using the equation for approximation.a. In footing A, compute the stress increase at the

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Answered: Two footings rest in layer of sand 2.7m…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Based on the figure shown below determine the width of the ?footing (B) in (meter) F2 F1 3.5 m 0.8 m Use: F1= 1,725 N; F2= 1,028 N; and allawable stress for soil = 173 N/m2
2- Determine the stress increase below the center of the footing using both theoretical and approximate methods at the top, middle and bottom of the clay layer. In addition, determine the average stress increase for the clay layer. Dimensions in Heights in m Unit weights in kN/m3 kN m P2 H1 H2 H3 BL Hw 2.5 Yoati 18.0 19.0 3.0 3.0 2.0 16.0 2 3 1174 Load - 0 Hw H1 H2 H3 OSand Clay (hoemally conactiduted)
Q.3. Three parallel strip footings 3 m wide each and 5 m apart center to center transmit contact pressures of 300, 450 and 150 kN/m2 respectively. Calculate the vertical stress due to the combined loads beneath the centers of each footing at a depth of 4 m below the base. Assume the footings are placed at a depth of 2 m below the ground surface. Use Boussinesq's method for line loads
H← N M 1m 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=75kN
A square footing of 2 m side is subjected to a vertical load of 2000 kN. Assuming load dispersion as 2V: 1H, the stress at a depth of 4 m below the base of the footing is
4. A square footing having a dimension of 3 m x 3 m carries an axial load of 1500 kN. The bottom of the footing is 2 m from the ground surface consisting of a layer of sand overlying a 4 m laye of clay. The water table is located 2 m below the ground surface. Dry unit weight of sand = 16.5 kN/m³ Saturated unit weight of clay = 20 kN/m³ Void ratio of clay = 0.80 Liquid limit of clay = 50% a. Compute the increase in vertical pressure. b. Compute the overburden pressure (effective pressure) at the midpoint of clay. c. Compute the primary consolidation settlement. 2m 4 m Sand 1500 KN 3m x 3 m Clay (normally consolidated) Ya 16.5 kN/m² 7sat 20 kNm' e = 0.80 LL = 50 | }
Show all work please be neat
A 3.19m x 5.35m footing has a 407 mm column at center with the loads P = 875 kN and My=120.4 kN-m Calculate the pressure at point 2 of the footing in kPa ANSWER IS 64.5392
2. A 2m X 2m footing carrying 1400KN load is constructed in a site with 2.5m thick clay layer under a 2.5m thick sand layer. If the footing and the ground water table are located at 1.5m below the surface, calculate the consolidation settlement of the footing. You may assume the following soil properties: for sand sat 15.7kN/m°, and for clay eo= 0.65, Cc = 0.25, Cs = 0.06, O'p = 200kN/m² and sat =19.25KN/m³. 19.25kN/m and t = %3D
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Q4: Use the rectangular loaded area to calculate the increase in vertical stresses at points (A) and (B) due to the loaded area of footing. Choose figure (1) or (2). Top view Top view it. awT CLAY 1 CLAY 1 CLAY 2 10m x 10m 150² INCOMPRESSIBLE Figure (1) B G.W.T ME CLAY 1 CLAY 1 CLAY 2 YA 10mX10m 7-15076 INCOMPRESSIBLE Figure (2)

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Two footings rest in layer of sand 2.7m thick. The bottom of the footings are 0.9m below the ground surface. Beneath the clay layer is hard pan. The water table is at a depth of 1.8m below the ground surface.