For a 4-m thick sandy soil deposit, laboratory tests indicate that its minimum and maximum void ratios are 0.43 and 0.86, respectively. Its relative density is 56%, and its specific gravity is 2.66. Yd-max Obtained by Standard Proctor Test is 18.31 kN/m³. The specification calls for relative compaction of 95%. Answer the following questions. a) What is the void ratio of this soil deposit? b) What is the dry unit weight (in kN/m³) of this soil deposit? c) What is the dry unit weight (in kN/m³) of the compacted soil?

For a 4-m thick sandy soil deposit, laboratory tests indicate that its minimum and maximum void ratios are 0.43 and 0.86, respectively. Its relative density is 56%, and its specific gravity is 2.66. Yd-max Obtained by Standard Proctor Test is 18.31 kN/m³. The specification calls for relative compaction of 95%. Answer the following questions. a) What is the void ratio of this soil deposit? b) What is the dry unit weight (in kN/m³) of this soil deposit? c) What is the dry unit weight (in kN/m³) of the compacted soil?

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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Concept explainers

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.

Question

For a 4-m thick sandy soil deposit, laboratory tests indicate that its minimum and maximum void
ratios are 0.43 and 0.86, respectively. Its relative density is 56%, and its specific gravity is 2.66.
Yd-max obtained by Standard Proctor Test is 18.31 kN/m³. The specification calls for relative
compaction of 95%. Answer the following questions.
a) What is the void ratio of this soil deposit?
b) What is the dry unit weight (in kN/m³) of this soil deposit?
c) What is the dry unit weight (in kN/m³) of the compacted soil?
d) What is the void ratio of the compacted soil?
e) What is the relative density of the compacted soil?
f) What will be the final height of this soil deposit after compaction?

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Find the minimum void ratio.