5. Soil exploration was conducted at a site in Greater Noida for the determination of bearing capacity of a square raft foundation of size 20 m to be placed at a depth of 4.5 m below the ground surface. SPT data of a borehole has been given in Table 1. Water table has been encountered at 6 m below the ground surface. Find out the corresponding corrected value of SPT resistance. Assume Ybulk = 18.5 kN/m³. Table 1 Depth below ground surface (m) | IS classification Nobs ML (NP) SM (NP) 1.5 9. 3.0 10 4.5 SP-SM 15 6.0 SP-SM 18 7.5 SP-SM 34 9.0 SP 56 10.5 SP 51 12.0 SM (NP) 77 13.5 SP 55 15.0 SP-SM 76 18.0 ML 80 21.0 SP-SM 81 24.0 SP 90 27.0 CL 86 30.0 CI 45 33.0 SM (NP) 62

5. Soil exploration was conducted at a site in Greater Noida for the determination of bearing capacity of a square raft foundation of size 20 m to be placed at a depth of 4.5 m below the ground surface. SPT data of a borehole has been given in Table 1. Water table has been encountered at 6 m below the ground surface. Find out the corresponding corrected value of SPT resistance. Assume Ybulk = 18.5 kN/m³. Table 1 Depth below ground surface (m) | IS classification Nobs ML (NP) SM (NP) 1.5 9. 3.0 10 4.5 SP-SM 15 6.0 SP-SM 18 7.5 SP-SM 34 9.0 SP 56 10.5 SP 51 12.0 SM (NP) 77 13.5 SP 55 15.0 SP-SM 76 18.0 ML 80 21.0 SP-SM 81 24.0 SP 90 27.0 CL 86 30.0 CI 45 33.0 SM (NP) 62

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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2. Please find the possible solutions for this question! A foundation 4 m x 5 m transfers a total load of 5 MN to stiff overconsolidated clay with an OCR=4 and ysar=19 kN/m (given figure below). Groundwater level is at 1 m below the ground surface. A CU test was conducted on a soil sample taken at a depth 5 m below the center of the foundation. The results obtained are (cu.)p = 40 kPa, o', = 28, and 'es= 24. Determine if the soil will reach the failure state for short- term and long-term loading conditions. If the soil does not reach the failure state, what are the factors of safety for short-term and long-term loading conditions? Assume the soil above the groundwater level is saturated. Please discuss the details of your findings! 5 MN Foundation: 4 m x 5 m 21 =1m Stiff clay 22 = 4 m Sample
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Find the increment inn vertical stress.
A 1.2 meter wide long (strip) footing carries a wall loading of 48 kN per meter of wall length. What vertical stress increase results below the center of the footing at depths of 1 meter, 2 meter, and 4 meter, assuming: (a) Boussinesq conditions apply.(b) Westergaard conditions apply. (c) Show all work
A circular footing with a radius of r = 4.0 ft will be embedded D = 2 ft in uniform clay. The top of the foundation is at the surface. The water table is at the ground surface. An intact sample of the clay with Gs=2.75 was obtained using a thin-walled Shelby tube from a depth of 10 ft below the ground surface. The sample was saturated and has a gravimetric water content of 45 %. Estimate its void ratio e0 and total unit weight y _in pcf. Ovp' = 800psf Void Ratio 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 do 10 0.1 0 2 z/r, depth in radii 6 7 8 9 Cr = 0.07 100 1000 Effective Stress (psf) 0.2 0.3 0.4 0.6 0.81.0 7.0 10.0 Cc = 0.3 8.0 9.0 5.0 6.0 I, stress in percent of surface contact pressure 2 3456 8.10 10000 3.0 2.5 (2.0) 1.25 20 30 40 50 60 80 100 1.0 PAG 0.75 Note: Numbers on curves indicate offset distances in radii, x/r. 2r Z 0.5 0₂- KAB X 0.25 IX q 100 0, 10 FIGURE 4.10 Chart for calculating the increase in vertical stress beneath a uniformly loaded circular area. (From NAVFAC DM-7.1, 1982,…
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Please answer question 3b Question 3b
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Subject: foundation engineering