A trench is to be excavated in a clay soil with y at = 20 kN/m² and s, = 15 kPa. (a) Determine the theoretical maximum depth of the trench without lateral support. (b) It was decided to use a bentonite slurry of unit weight y, to fill the trench as excavation proceeds. Show that the theoretical maximum depth of the trench is H, = unit weight of the soil and s, is the undrained shear strength. (c) How much deeper can the trench be excavated by using a bentonite slurry of y; = 11 kN/m?? - where y a is the saturated Yrat - Yf

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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SOLVE THE PROBLEM a,b,c parts GIVEN IN IMAGE IN TYPED FORM NOT WRITTEN FORM PLEASE.

A trench is to be excavated in a clay soil with y sat =
20 kN/m² and s, = 15 kPa.
(a) Determine the theoretical maximum depth of the
trench without lateral support.
(b) It was decided to use a bentonite slurry of unit
weight y, to fill the trench as excavation proceeds.
Show that the theoretical maximum depth of the
45.
- where ya is the saturated
trench is H, =
unit weight of the soil and s, is the undrained
shear strength.
(c) How much deeper can the trench be excavated by
using a bentonite slurry of y;= 11 kN/m²?
Ysat - Y
Transcribed Image Text:A trench is to be excavated in a clay soil with y sat = 20 kN/m² and s, = 15 kPa. (a) Determine the theoretical maximum depth of the trench without lateral support. (b) It was decided to use a bentonite slurry of unit weight y, to fill the trench as excavation proceeds. Show that the theoretical maximum depth of the 45. - where ya is the saturated trench is H, = unit weight of the soil and s, is the undrained shear strength. (c) How much deeper can the trench be excavated by using a bentonite slurry of y;= 11 kN/m²? Ysat - Y
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