Problem 4: Total stress, pore pressure and effective stress A soil profile is shown in the following figure. Calculate the total stress, pore water pressure and effective stress at points A, B, and C. 6m 13m B Dry sand Saturated sand Clay Dry sand Ydry 16.5 kN/m³ Groundwater table Saturated sand Ysat 19.25 kN/m³

Problem 4: Total stress, pore pressure and effective stress A soil profile is shown in the following figure. Calculate the total stress, pore water pressure and effective stress at points A, B, and C. 6m 13m B Dry sand Saturated sand Clay Dry sand Ydry 16.5 kN/m³ Groundwater table Saturated sand Ysat 19.25 kN/m³

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.15P

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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
QI: Determine the distribution of total stress, pore water pressure and effective stress for the soil profile shown in the figure. NGL Hw yl dry H1 yl Saturated y1dry=15.60 y1saturated=17.50 y2saturated=18.55 H1=12.00 H2=64.00 Y2 Saturated H2 Hw=8.75
viruses Unless you need to edit, it's sater to stay in riooutu VIum 11 Example The soil profile is shown below. Plot effective stress, total stress and pore pressure with depth for the entire profile. The soil profile is shown below. What are the total stresses effective stresses at point A WAYAYT. WAYINA P = 2.70 Mg/m3 2 m Sand n= 0.5 2 m Psat = 2.0 Mg/m3 4 m Clay A Activate Window Go to Settings to activat ||
the soil profil shwon in figure BI below.determine total and effective vertical stresses and powr water Pressure at Points A, B, and C. For the soil 3m 4m 6m I Sand A5=2167 €=0.69 B C w=9% Silt Gs =2170 = 2₁70 e=0.60 clay = 2.72 @= 0.5 G₁ 5 = 70%
Calculate the variations of o, u, and o' at points A, B, and C, and how high should the groundwater table rise so that the effective stress at C is 111 kPa? A Dry sand e=0,61 G = 2.66 4 m - B Saturated sand. 5 m e = 0,48 G=2.67 Clay © Cengage Learning 2014
In the deposit shown in the accompanying figure the groundwater level was originally at the ground surface. The water table was lowered by drainage to a depth of 25 ft., whereupon the degree of saturation of the sand above the lowered water table decreased to 20 percent. 1. What is the effective vertical stress at the mid height of the clay layer before lowering the water table? a. 4350 psf b. 4560 psf c. 3500 psf d. 6400 psf 2. What is the effective vertical stress at the mid height of the clay layer after lowering the water table? a. 4343 psf b. 4557 psf c. 5530 psf d. 6452 psf 3. What is the effective vertical stress at the mid height of the clay layer after lowering the water table to a depth of 50 ft? a. 5580 psf b. 6710 psf c. 3680 psf d. 5860 psf
1. A soil profile is shown in Figure below. Calculate the total stress, pore water pressure, and effective stress at points A and D. Dry sand G.-2.68 *»0.6 2 m 2m Groundwater table Clay G₁-2.72 e-09
In a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 1b/in2 and friction angle is 210 . Calculate the effective confining pressure at failure.? A) 21 1b/in2 B) 22.2 1b/in2 C) 25.4 1b/in2 D) 17.9 1b/in2 make it fast
12.4 The following are the results of four drained direct shear tests on undisturbed nor- mally consolidated clay samples having a diameter of 50 mm. and height of 25 mm. Normal Shear force at Test no. force (N) fallure (N) 1 67 23.3 133 46.6 3 213 44.6 4 369 132.3 Draw a graph for shear stress at failure against the normal stress and determine the drained angle of friction from the graph. © Ceng age Leaming 2014
a. a. A moisture release curve shows the relationship between _______ and ________ for a soil. b. Draw this relationship for a sand vs. a clay using well-labeled axes. Be sure to indicate the relative scale of magnitude on axes. List the units usually associated with the X and Y variables.
k Il.pdf 1C:/Users/YONAST%20TSIGHE/Downloads/BYG504%20G%20Geoteknikk%20|l.pdf Water content of a saturated soil sample A at a mean effective stress of 50 kPa is 85%. Under a standard CD test, sample A was iso-tropically consolidated to a mean effective stress of 400 kPa, the water content was 65% at the end of the consolidation. It was then iso- tropically unloaded to a mean effective stress of 300 kPa, its water content increased by 1%. a) Calculate 2 and K, and try to draw the initial yield surface and critical state line in a p', q coordinate if o'cs= 30°; if a standard CD test was continued by keeping the o: and o: pressure constant while increasing the axial stress ơi, predict stresses p'y and qy at initial yielding, and its elastic volumetric strain and plastic volumetric strain. b) After this initial yield, a stress path Ag/Ap=2 is continued in a drained condition, predict the volumetric elastic and plastic strain increment when mean stress p' was increased by 50 kPa along this…
k Il.pdf iL| C/Users/YONAST%20TSIGHE/Downloads/BYG504%20G%20Geoteknikk%201l.pdf 2. A.) Plot the distribution of total stress, effective stress and porewater pressure along depth of soil as shown in Figure 1 (water table 4.5 meter from its surface). Plot effective stress paths for the lower layer of soil at rest by assuming the soil has an internal friction o'= 30°. B.) As consolidation test on a sample taken at bottom showed: 2-0.3, K = 0.05 and v' = 0.3, calculate the sample's effective elastic bulk moduli E' and shear modulus G; Find the changes of such parameters when the water table rises to its surface. 4-0.7, sE035 4.5m. Figure 1. Layers of soil site