A retaining wall currently stands 6.3 m high, supporting a level backfill of dry granular material with a unit weight of 16.2 kN/m³. The horizontal active thrust exerted on the wall is estimated to be 75 kN per meter length of the wall. To allow for an increase in the wall's height without exceeding the existing thrust, a portion of the backfill extending from the top down to a depth of 2.8 m is excavated and replaced with a lighter material (e.g., cinder) that has a unit weight of 8.2 kN/m³.

A retaining wall currently stands 6.3 m high, supporting a level backfill of dry granular material with a unit weight of 16.2 kN/m³. The horizontal active thrust exerted on the wall is estimated to be 75 kN per meter length of the wall. To allow for an increase in the wall's height without exceeding the existing thrust, a portion of the backfill extending from the top down to a depth of 2.8 m is excavated and replaced with a lighter material (e.g., cinder) that has a unit weight of 8.2 kN/m³.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter14: Lateral Earth Pressure

Section: Chapter Questions

Problem 14.2P

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please, solve question 16.3 question in figure