Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 14, Problem 14.9P
(a)
To determine
Draw the variation of Rankine’s active pressure on the wall with depth.
(b)
To determine
Find the depth up to which, a tensile crack can occur.
(c)
To determine
Find the total active force per unit length of the wall before the tensile crack occurs.
(d)
To determine
Find the total active force per unit length of the wall after the tensile crack occurs.
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Students have asked these similar questions
A retaining wall 6 m high with a vertical back face retains a homogeneous saturated soft clay. The saturated unit weight of the clay is 19.8 kN/m^3. Laboratory tests showed that the undrained shear strength, cu, of the clay is 14.7 kN/m^2.
a. Do the necessary calculations and draw the variation of Rankine’s active
pressure on the wall with depth.
b. Find the depth up to which a tensile crack can occur.
c. Determine the total active force per unit length of the wall before the tensile crack occurs.
d. Determine the total active force per unit length of the wall after the tensile crack occurs. Also find the location of the resultant.
Considering that the horizontal thrust from the back of a 5.5 m wide brick wall to the 1 m deep part of the wall is H = 55 kN
a) Find the greatest stress in the base when b = 2 m.b) Find the width b so that there is a shrinkage zone at the base.(Note: unit weight of brick wall ỿ = 24 kN / m3 )
Answer: ϭmax=0,30 Mpa, b=2,23 m
18- Pressure applied equally on a rock:
A. differential pressure
B. directed pressure
C. shear pressure
D. confining pressure
Chapter 14 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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Similar questions
- i need the answer quicklyarrow_forwardThe total horizontal and vertical stresses at a point X in a saturated sandy medium are 170 kPa and 300 kPa, respectively. The static pore-water pressure is 30 kPa. At failure, the excess pore water pressure is measured to be 94.50 kPa, and the shear stresses on the vertical and horizontal planes passing through the point X is zero. Effective cohesion is 0 kPa and effective angle of internal friction is 36°. The shear strength (kPa, up to two decimal places) at point X isarrow_forwardGiven the height of the retaining wall, H is 6.4 m; the backfill is a saturated clay with f 5 08, c 5 30.2 kN/m2 , gsat 5 17.76 kN/m3 , a. Determine the Rankine active pressure distribution diagram behind the wall. b. Determine the depth of the tensile crack, zc. c. Estimate the Rankine active force per foot length of the wall before and after the occurrence of the tensile crack.arrow_forward
- syarrow_forwardPoint A Water Lake Yw=9.81kN/m 4m -Point Br Saturated Sand Ya#16.5kN/m 6m Point C Saturated Silty clay Ysa=18kN/m 4m Point D Bed Rock & y =21.5kN/m (i) Calculate the following stresses at Points A, B, C and D. (a) Total stress (6) (b) Pore water pressure (u) (C) Effective stress (a')arrow_forwardThe following concrete gravity wall of 7 m in height retains a sandy backfill. A sand sample from the backfill was brought to the laboratory and tested in a direct shear device under a normal stress of 100 kPa and failure occurred at a shear stress level of 63.4 kPa. Using the Rankine theory, determine the total active earth pressure at the base of the wall when: a) the backfill is dry, b) the backfill is partially submerged in water for a water level at 3.5m from the base of the wall, c) the backfill is fully submerged in water, which means the water table is at the ground surface. Notes: - The saturated unit weight of the soil is 19 kN/m³ -The moist unit weight of the soil is 17 kN/m³ - The dry unit weight of the soil is 15 kN/m³ Summarize your results in this table: b) Total active earth pressure at the base of the wall (kPa)arrow_forward
- 1-33. The specimen failed in a tension test at an angle of 52° when the axial load was 19.80 kip. If the diameter of the specimen is 0.5 in., determine the average normal and average shear stress acting on the area of the inclined failure plane. Also, what is the average normal stress acting on the cross section when failure occurs? 52° 0.5 in. Prob. 1-33arrow_forward1. What is the rock’s maximum principal stress? 2. What is the rock’s minimum principal stress? 3. Normal stress at Failure Plane A-B 4. Shear stress at Failure Plane A-Barrow_forwardi need the answer quicklyarrow_forward
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