Fground surface Y-15.6 kN/m Year-16.6 KN/m 4 m waler table Clay 5 m Y=17,8 kN/m Compute the effective stress at the bottom of the clay. a) 120.53 kPa b) 102.35 kPa e) 112.65 kPa d) 121.56 kPa If the water table rises to the level of the soll surface, what is the effective stress at the bottom of the clay? a) 66.55 kPa b) 78.11 kPa c) 67.11 kPa d) 48.19 kPa

Fground surface Y-15.6 kN/m Year-16.6 KN/m 4 m waler table Clay 5 m Y=17,8 kN/m Compute the effective stress at the bottom of the clay. a) 120.53 kPa b) 102.35 kPa e) 112.65 kPa d) 121.56 kPa If the water table rises to the level of the soll surface, what is the effective stress at the bottom of the clay? a) 66.55 kPa b) 78.11 kPa c) 67.11 kPa d) 48.19 kPa

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter9: In Situ Stresses

Section: Chapter Questions

Problem 9.4P

See similar textbooks

Similar questions

A strip load of q =53 kN/m^3 is applied over a width B =11m. Determine the increase in vertical stress in kPa at point A located z = 4.6 m below the surface. x = 8.2m
A soil profile, under surcharge load of 25 kN/m2 at ground level, consists of 6m sand and 3m clay layer. Ground water table is 2m below sand layer. Dry unit weight and saturated unit weight of sand is 15.80kN/m3 and 16.90kN/m3 respectively. Clay layer, Gs=2.67 and saturated unit weight is 18.80 kN/m3. Determine a)Increase in stress at the mid layer of clay b) With dewatering 2m, what is the stress increase at the mid layer of clay c) How much must the water level be lowered to me more effective than the surcharged load?
A vertical load of 260 kN is applied to a 1.2 m * 1.2 m area at the ground surface that islevel. Compute the induced vertical stress, ∆sz, at a point 1.5 m below the corner of thissquare loaded area.
A dense silt layer has the following properties.void ratio = 0.30eff. Diameter ?10 = 10??capillary constant (c)=0.20 cm²Groundwater level is 8.0m below the ground surface 1. Calculate the height of capillary rise in the silt. 2. Calculate the vertical effective stress in kpa at 5m depth, assume ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%. 3. Calculate the effective vertical stress at 10m depth assuming ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%.
If the water table was found in the interface of clay and sand instead (at 5m depth), graph the effective stress diagram of the profile. Consider a 2.5m capillary rise and S = 85% in that capillary zone. The properties of the first clay layer apply to the entire zone above the capillary zone. For specific gravity, Gs = 2.68.
A soil stratum has two layers a 4m-thick dry sand underlain by a 5m–thick saturated sand. Dry unit weight and saturated unit weight of sand are respectively 16.21 KN/m3 and 20.88 KN/m3. How high in m should the GWT rises from the top of the saturated sand layer so thatthe effective stress at the bottom of that same layer is 104 kPa?
5. A thick layer of stiff saturated clay is underlain by a layer of sand under artesian pressure. A deep cut is made in the clay layer as shown in the attached figure. Determine: [2] a. The total stress at point A. b. The factor of safety against heaving at point A, if the effective stress is 12% of the total stress.
The water table in an 8 m thick silty sand deposit lies at a depth 3 m below the ground level. The entire soil above the water table is saturated by capillary water and the saturated unit weight is 18.8 kN/m^3 . Calculate the a) total vertical effective stress, b) the porewater pressure, and c) the vertical effective stress at 8 m below the ground level. Express answers in kPa rounded to the first decimal place.
Situation 3:The water table in a certain deposit of soil is at a depth of 2m below the ground surface. The soil consists of clay up to depth of 4m from the ground and below which lies sand. The clay soil is saturated even above the water table:Clay strata: ? = 30%, ?? = 2.72Sandy Strata: ? = 26%, ?? = 2.64 1. Compute the total pressure.2. Compute the pore water pressure.3.Compute the effective stress pressure at a depth of 8m below the ground surface.
A rectangular footing (4.14 x 4.43 m) is placed 1.38 m below the ground surface. The soil arrangement is composed of sand (ground) for the first 6.29 m and followed by clay for the next 5.94 m. The force acting on the footing is 10581 kN. Determine the resulting stress increase at the midheight of the consolidating layer in kPa. Assume 2V:1H pressure diagram. Unit weight of sand = 16.8 kn/m3. Unit weight of clay = 18.4 kn/m3
Plz give the correct answer. Compute the intensities of active and passive earth pressure at depth of 8 m in dry cohesionless sand with an angle of internal friction of 30 degrees , and unit weight of 18kN / (m ^ 3) What will be the intensities of active and passive pressure if the water level rises to the level? Take the saturated unit weight of sand as 22kN / (m ^ 3) .
a) determine the horizontal effective stress at A. (Ans. 53.36 kPa) b) determine the lateral effective stress at point A if the lateral earth pressure coefficient at rest Ko=0.50. (Ans. 26.68 kPa) c) determine the lateral total stress at point A.