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A retaining wall has an overall height of 15 ft, a type 2 backfill material, and a backfill slope (beta) of 20 degrees Compute the horizontal active earth pressure

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

A retaining wall has an overall height of 15 ft, a type 2 backfill material, and a backfill slope (beta) of 20 degrees

Compute the horizontal active earth pressure

Group of answer choices

1,740 lb/ft

300 lb/ft

5,625 lb/ft

4,500 lb/ft

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Calculate the lateral force resulting where an active soil pressure condition develops against the backface of a frictionless wall 20 ft high if the backfill surface is level and the retained soil is cohesionless (unit weight of 115 pcf and angle of internal friction of 35°).
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GEOTECHNICAL ENGINEERING 2 - '21 QUIZ 5 A 6m retaining wall supports a soil with the following properties as shown below. A surcharge of 20 kPa is imposed on the ground surface. Water table is located between the interface of the 2 types of the soil. If soil above water table is dry, find: A. Total Active pressure acting on the wall per meter of its width. B. Location of the Resultant pressure from the base of the RW. C. Overturning moment caused by the active pressure acting on the wall. STRATUM Depth Gs e 1 2 m 2.50 0.65 28° 1.8 kPa 2 4 m 2.85 0.48 32° 2.4 kPa
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a building will have a sitting wall on the north side of the building to allow for seating during outdoor season. the wall will be 1.5 meter tall. what is the minimum width of the wall to ensure that it will not slide or overturning? the soil behind the wall is a sand with Gamma dry= 18.3 kN/m^3 , gamma buoyant =11.5 Kn/m^3 , gamma water= 9.81 kN/m^3 and phi= 36 degrees. the water table is 0.5 m below the ground surface. to enhance the aesthic value of the seating area, the architect has asked that the wall he made of granite ( gamma granite= 25 kN/m^3. Hand written pls
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T 3 m 3 m Ground water table y = 16 kN/m : 30° = c=0 3. Ysat = 18 kN/m Ø = 35° c=0 For the retaining wall shown above calculate the following: A) Calculate the value of K (for either the 'active' or 'passive' earth pressure - whichever is appropriate! ...you decide). B) Calculate and sketch the pressure distribution on the 'back' side (soil side) of the retaining wall (show all of the relevant pressure distributions and indicate the magnitude of the distributions on the sketch). Indicate the correct units! C) Calculate the resultant horizontal force for each pressure distribution and calculate the total overturning moment about the base of the wall. Show the forces in the correct units! D) If this wall has a 'depth' (in-and-out of the 'page') of 20-m, what is the total horizontal force applied to the wall? How much total friction force is needed between the base of the wall and the soil to provide a Factor of Safety of 2.0 against 'sliding'.
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