Using stability number method (chart based method), determine the short-term stability (factor of safety - FOS) of the embankment slope given in Figure 1. The unit weight of the embankment material is 20 kN/m² and its undrained shear strength (cy) is 30 kN/m² Stability Number Method for Slopes in Undrained Soil 7m 30⁰ Figure 1 2 0.30 0.25 0.20 0.15 0.10 0.05 0 0 A 10° 20 1.5 20 Cu FH Firm stratum 40" &1 19 DH 9.0 2 70° 8 &

Using stability number method (chart based method), determine the short-term stability (factor of safety - FOS) of the embankment slope given in Figure 1. The unit weight of the embankment material is 20 kN/m² and its undrained shear strength (cy) is 30 kN/m² Stability Number Method for Slopes in Undrained Soil 7m 30⁰ Figure 1 2 0.30 0.25 0.20 0.15 0.10 0.05 0 0 A 10° 20 1.5 20 Cu FH Firm stratum 40" &1 19 DH 9.0 2 70° 8 &

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter13: Slope Stability

Section: Chapter Questions

Problem 13.26P

See similar textbooks

Similar questions

1: An embankment is to be constructed by making use of sandy clay having the following properties: c' = 35 kN/m², o' = 25° and y= 19.5 kN/m³. The height of the embankment is 20 m with a slope of 30° with the horizontal as shown in below Figure. Estimate the factor of safety by the method of slices for the trial circle shown in the figure. 20 m 77 ww 25° A 30° 35° c'= 35 kN/m² p' = 25° y = 19.5 kN/m³ 25 m
You are required to analyse a slope stability problem using the Swedish method for failure along the slip surface as shown in the figure below. The slope is inclined at an angle of 30° to the horizontal and has a height of 10 m. The ground water table (GWT) is located at a depth of 5.1 m below the crest. It goes along the slope and reaches at the toe level as shown in the figure. Soil investigation revealed that the site consists of a layer of silty clay overlying a layer of sand. Assume c = (40 + 2x) kPa and ϕ = 10° for the silty clay, and c = 0 and ϕ = (30 + x)° for the sand layer; where x is the last digit of your student ID (e.g., if your student ID is 5746189, x = 9). All slices have equal width (b = 2.89 m) and the slices are numbered 1‒6 from left to right. The coordinates of the midpoint of the bases (M , M , M , M , M , M ) of the slices are shown on the right side of the figure. The weights of slices 1‒6 are as follows (in kN/m): W1 = 53.5, W2 = 141.3, W3 = 199.6, W4= 224.8,…
Please calculate the critical factor of safety for the following slope configuration using the following m ethods: Using slope stability charts Layer 1 Clay c=35 kN/sq.m Friction Angle=0 Unit Weight-18 kN/cu.m Layer 2 Silty Sand c=5 kN/sq.m Friction Angle=35 deg Unit Weight=18 kN/cu.m Slope Height=10 m Slope Angle=30 Degrees Layer 1
Calculate the safety factor with the following conditions in a rock slope, likewise this slope requires a long-term static SF project equivalent to 2 based on the RCCDMX. b Zw B H a 02 A Rock mass properties: -Cohesion =3.3 T/m2 ; Internal friction angle: = -ymat = 3.8 T/m3; b=3m; B=6m; a=60° - 01=45° ; 0=72°; Zw=4m; Ax=12 m2 35° 01
A 1.2 m height highway embankment of large lateral extent is to be placed over a surface clay deposit of 10 m thickness which is underlain by sand as shown in the figure below. A- Compute the ultimate settlement expected under the embankment. 1.2 m 10 m Embankment of large extent (y = 16.1 KN/m³); Clay Y= 18.1 KN/m³ sat P = 50 Kpa, e = 1.01 Cc = 0.17, C = 0.04 C, = 13 m²/yr Sand (x = 18.1 KN/m³) sat G.W.T
Problem 1Explain whether the following are true or false. 1. A lower safety factor implies that a greater fraction of the shear strength is mobilized along the failure surface. 2. In an undrained slope of 1.0 (horizontal): 1.5 (vertical), the critical circle is always a toe circle. 3. The mid-point circle passes through the toe. 4. Taylor’s stability charts can be used only for homogeneous soils.
Using ₁ = 0 analysis and assuming planar failure as shown, the minimum factor of safety against shear failure of a vertical cut of height 4 m in a pure clay having C₁ = 120 kN/m2 and Ysat Y sat = 20 kN/m³ is 77XXX77XXX Potential failure plane 4 m →
What is the greatest slope angle (B) of a slope formed by a cohesionless (C=0) sand? Assume the friction angle of the sand, o'= 28° O a. 280 Ob 350 OC. This sand cannot form a slope Od. Information is insufficient to determine
An infinite slope in purely cohesive soil has a saturated unit weight of 20 kN/m^3 and effective cohesion of 48 kPa. It has a slope of 18 degree. The clay has a depth of 5m over ledge rock. Depth of clay is measured vertically. 1. Determine the FS against slippage. Blank 1 2. Determine the critical depth. Blank 2 3. Compute for the stability number. Blank 3 Blank 1 Add your answer Blank 2 Add your answer Blank 3 Add your answer
6. Plot the variation of Ovo, Dovo and u with depth for the soil profile overleaf. 4 m Sand Ym = 17.5 kN/m³ 2 m Ym = 17.0 kN/m3 Sandy gravel 3 m Ysat = 19.5 kN/m3 3 m Clay Ysat = 19.0 kN/m³ %3D
A highway embankment is to be constructed of height 10m over a soft clay deposit of 10m thick overlying firm dense sand. The soft clay has an undrained cohesion of 37.5kN/m² and unit weight of y = 17.5kN/m³. It is decided to adopt stone column technique to improve the load carrying capacity of soft clay deposit. If a equilateral pattern of stone column is adopted with a c/c spacing of 1.2m and the diameter as 0.6m, Estimate the load carrying capacity of stone column as per IS15284 (Part 1): 2003. Assume the stone column as an end bearing long column of length 10m.
Que.5 A long natural slope in overconsolidated fissured clay of saturated unit weight 22kN/m³, is inclined at 14 degrees to the horizontal. The water table is at the surface and seepage is approximately parallel to the slope. A slip surface has developed on a plane parallel to the surface at a depth of 4m. Determine the factor of safety along the slip plane using the residual strenght parameter, o'r=20 degrees.