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A 4 m wall retains a dry sand backfill with a unit weight of 18.3 kN/m°, an angle of internal friction of 36° and a porosity of 31%. The backfill is fully drained through weep holes. 1) What is the magnitude of the backfill force on a 1 m wide slice of wall if it deflect? not allowed to 2) What is the magnitude of the backfill force on the same 1 m wide slice, if the wall does deflect enough to develop a Rankine active earth pressure condition? 3) What is the new force on the wall, and its location from its heel, if the wall's weep holes are clogged and the water table now rises to within 1 m of the ground surface behind the wall? a h= 4 m F3 F4

A 4 m wall retains a dry sand backfill with a unit weight of 18.3 kN/m°, an angle of internal friction of 36° and a porosity of 31%. The backfill is fully drained through weep holes. 1) What is the magnitude of the backfill force on a 1 m wide slice of wall if it deflect? not allowed to 2) What is the magnitude of the backfill force on the same 1 m wide slice, if the wall does deflect enough to develop a Rankine active earth pressure condition? 3) What is the new force on the wall, and its location from its heel, if the wall's weep holes are clogged and the water table now rises to within 1 m of the ground surface behind the wall? a h= 4 m F3 F4

Structural Analysis
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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A 4 m wall retains a dry sand backfill with a unit weight of 18.3 kN/m°, an angle of internal friction of 36° and a porosity of 31%. The backfill is fully drained through weep holes. 1) What is the magnitude of the backfill force on a 1 m wide slice of wall if it deflect? not allowed to 2) What is the magnitude of the backfill force on the same 1 m wide slice, if the wall does deflect enough to develop a Rankine active earth pressure condition? 3) What is the new force on the wall, and its location from its heel, if the wall's weep holes are clogged and the water table now rises to within 1 m of the ground surface behind the wall? a h= 4 m F3 F4
Transcribed Image Text:A 4 m wall retains a dry sand backfill with a unit weight of 18.3 kN/m°, an angle of internal friction of 36° and a porosity of 31%. The backfill is fully drained through weep holes. 1) What is the magnitude of the backfill force on a 1 m wide slice of wall if it deflect? not allowed to 2) What is the magnitude of the backfill force on the same 1 m wide slice, if the wall does deflect enough to develop a Rankine active earth pressure condition? 3) What is the new force on the wall, and its location from its heel, if the wall's weep holes are clogged and the water table now rises to within 1 m of the ground surface behind the wall? a h= 4 m F3 F4
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