A retaining wall 10 m high retains a cohesionless soil having anangle of internal friction of 300. The surface of the soil is level with the top of the wall. The top 3 m of the fill has a unit weight of 20kN/m3 and that of the rest is 30 kN/m3 . Find the magnitude per metrerun and point of application of the resultant active thrust. Assume φthe same for both the strata.

A retaining wall 10 m high retains a cohesionless soil having anangle of internal friction of 300. The surface of the soil is level with the top of the wall. The top 3 m of the fill has a unit weight of 20kN/m3 and that of the rest is 30 kN/m3 . Find the magnitude per metrerun and point of application of the resultant active thrust. Assume φthe same for both the strata.

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter12: Lateral Earth Pressure

Section: Chapter Questions

Problem 12.5P

See similar textbooks

Similar questions

ID:(9536)
A retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 4.47m high. It has a unit weight of 16.92kN/m3. The second layer is 5.76m and has a unit weight of18.51 kn/m3. If the angle of friction for both layers is 38 degrees, determine the total active force (kN) acting on the retaining wall per unit. Use stored value. Asnwer on 5 decimal places.
2m 3.5m Ax m 5.00m SIA 2 3.00 m 15 m Figure (1) ZOL Question II: The section through part of a cofferdam is shown in Figure (1), the saturated unit weight of the soil being 19.5 kN/m³. Determine the value of effective vertical stress at point (A), and find the factor of safety against a heave failure in the excavation adjacent to the sheet piling.
The proposed building will exert a net stress of 12 Newtons per square centimeter. a) Determine the buoyant unit weight of the clay b) Determine the effective vertical stress at the mid-height of the clay layer c) Determine the average settlement of the normally consolidated clay layer. Use compression index C = 0.009(LL - 10)
An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 9from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Estimate the shear strength of the material on a horizontal plane at a point 20 m below the surface of the embankment. Include fbd
i need the answer quickly
50. Whle drlling a well a rock layer Is encountered at 10000 ft. depth with an excess preSsure (overpressure) of 150 psl. An overpressure zone has fluld pressures In excess of the hydrostatic gradlent. If the overburden density Is 2400 kg/m* and the flutd column Is water what Is the effective stress at this depth? a. b. 57.68 MPa 4127.6psl d. 5549.0psl
Y=15kN/m²³ Y=12.5 kN/m³ 0 p = 150 kPa e₁ = 0.95 KON.C.=0.57 m = 0.4 Y = 27.5 kN/m³ sand 9m Clay [ Bedrock * ↑ 3m ↓ 18m 5m ↓↓↓ A) What is the total vertical stress, o (in kPa) at the mid point of the clay layer? B) What is the pore water pressure, u linkPa) at the midpoint of the clay layer? c) What is the effective vertical Stress, o'v (in kPa) at the midpoint of the clay layer D) What is the over consolidated Ratio (OCR) at the midpoint of the clay layer? E) What is the total horizontal Stress (inkPa) at the midpoint of the clay layer?
Calculate the settlement of the bridge pier shown in Fig. ?-f (page 3) due to primary consolidation of the clay. The bridge load imposes an approximate vertical stress increase at the center of the clay layer of 150 kPa.
Answer d and e
A mine has a 6m diameter vertical ventilation shaft. Calculate the radial, circumferential and shear stresses 0.2m into the rock at the north point (A) for a depth of 2500m below surface. Draw a simple sketch of the shaft showing the stresses, directions, the point A with proper labels. The principal in situ horizontal stress in the north-south direction is equal to half the overburden stress, and the principal in situ horizontal stress in the east- west direction is twice the overburden stress. The unit weight of the rock y is 0,025 MN/mº. The modulus of elasticity of the rock E is 50 GPa, and Poisson's ratio for the rock v is 0,25. Assume that the rock behaves elastically.
A 5-m depth of sand overlies a 6-m layer of clay, the water table being at the surface. The saturated unit weight of the sand is 19 kN/m3 and that of the clay is 20 kN/m3. Use the unit weight of water (?!) is 9.81 kN/m3. (a) Determine the total and effective vertical stresses at the centre of the clay layer. (b) The coefficient of lateral earth pressure at rest, ?", of the clay is identified as 0.8. Calculate the total and effective horizontal stresses at the centre of the clay layer.