For the subsoil condition shown in Figure. calculate the total, neutral and effective stresses at 1 m, 3 m & 6 m elevations. Assume Yw = 10KN/m3. %3D GL 1m W.T 3m Sand e=0.4,G, 2.65 nommo Ysat = 20kNm3woai vetaW 6m l Clay

For the subsoil condition shown in Figure. calculate the total, neutral and effective stresses at 1 m, 3 m & 6 m elevations. Assume Yw = 10KN/m3. %3D GL 1m W.T 3m Sand e=0.4,G, 2.65 nommo Ysat = 20kNm3woai vetaW 6m l Clay

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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Select the TRUE combination statement below:- In flood condition, soil have to undergo additional effective stress due to the submerged condition, thus the submerged unit weight is y' = Y sat - Y w In geotechnical engineer the zero effective stress conditions is the most stable ground condition If we have a flood condition, the effective stress in soil will reduce and will i. ii. iii. endanger the integrity of the building above. Capillary rise will increase the effective stress at the maximum of it height. iv. i, ii, i i,ii, iv i,i All of above
Determine the effective stress (i.e. grain pressure) σ'v0 acting in the plane of consideration
A 8ft clay layer reaches 100% consolidation in 13 years and has a natural water content of 75%, what is the secondary compression settlement in the soil if the building life is expected to be 45 years. Report your answer to three decimal places and in inches. Coefficient of Secondary Compression, Ca 0.04 0.03 0.02 0.01 Type your answer... wy 50 Average Ca for Completely Remolded Samples Falls in This Zone 100 150 200 Natural Water Content, % FIGURE 7-21 Coefficient of secondary compression; C = ratio of decrease in sample height to initial sample height for one cycle of time on a logarithmic scale following completion of primary consolidation. Source: U.S. Department of the Navy (1971). Range Undisturbed Samples: Ca in Range of Virgin Compression Cain Range of Recompression Lies Below This Upper Limit 250 300 350 400
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My soil has the following profile with depth: 0-10 ft gammat = 115 pcf 10-30 ft gammasat = 98 pcf 30-55 ft gammasat = 110 pcf where gamma is the unit weight The water table is at a depth of 10 ft. Plot the total stress, effective stresses, and pore pressure versus depth. Show the calculations, and assume there is no capillarity.
3. For the system shown, L = 1.20m, h = 2.30m, and y = 1.90m. What is the effective stress 5. From the figure shown. at point A where z = 0.70m? h =1.5m 1.5m Standpipe G=2:68 é 0.5 Saud 2.5m Porous stone valve орen Soil A In flow Yan = 19.5 kN/m Cross - sectional area of tank = 0.6 m? Porous stone Hydraulic conductivity of sand = 0.1 cm/s a. What is the rate of upward seepage of water? b. What would be the critical hydraulic gradient?
Figure B: Stress diagram Total Stress (6) Pore Water Pressure (u) Effective Stress (o') 26.2 kPa 26.2 kPa -2.0 m \71.2 kPa 25 kPa i) ?? kPa -4.5 m Vii) ?? kPa 70 kPa 90.3 kPa -9.0 m Figure B Stress diagram Now, assume groundwater table is far, referring to the Figure B, calculate the dry unit weight for 2nd layer (depth below existing ground surface from 2 m till 4.5 m). Assume the specific gravity is 2.65 and unit weight of water is 10 kN/m3. Answer in kPa with two decimal place only. (Please write down value only. Don't input unit in the answer) Your answer
A soil profile is shown below. A uniformly distributed load, Δp = 51 kPa, is applied at the ground surface. Assume Cs = 1/5 Cc Determine the settlement of the clay layer caused by primary consolidation if: a. The clay is normally consolidated b. The pre consolidation pressure pc is 216 kPa c. The pre consolidation pressure pc is 151 kPa Please answer this asap. For upvote. Thank you very much
2) The data s hown in the ff table were obtained 1n tri-ayial Compression tests of three identical Soil speci mens. Cell Pressure (kra) test Doviator Stress (KPa) 180 285 390 50 2 100 150 a) Compute the Angle of internal friction b.) Compute the Soils cohesion: C:) Compute the Potential Shar Strungth of soil at depth of umetars belouw the grouvd sarface if GWT is located 2 meters below ground Surface if the soil has dry unit weight of I6 kN m3 and a Soturated unit weight of ef 20 KN)/m².
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How high should the groundwater table be so that the effective stress at C is equal to 110 kPa? (1.67 m) GWT e= 0.61 Gs 2.66 4.0 m H = ? 5.0 m
Quize (3): A soil sample is subjected to an all-round pressure of 100 kN/m, the pore water pressure was 93 kN/m. With the drainage valve remains closed an increment of principal stress difference (o, -o,) was applied causing the pore water pressure to increase to 133 kN/m. Knowing that A-0.4, determine B and (o, -a,). 1 Add file