BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939

Solutions

Chapter
Section
BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939
Textbook Problem

The in situ moist unit weight of a soil is 16.6 kN/m3, and the moisture content is 19%. The specific gravity of soil solids is 2.69. This soil is to be excavated and transported to a construction site for use in a compacted fill. If the specification calls for the soil to be compacted to a minimum dry unit weight of 19.5 kN/m3 at the same moisture content of 19%, how many cubic meters of soil from the excavation site are needed to produce 2500 m3 of compacted fill? How many 20-ton (≈ 18,144 kgf) truckloads are needed to transport the excavated soil?

To determine

Find the volume of soil are required from the excavation site for the production of 2,500m3 volume of compacted fill and the number of truck loads required for the excavated soil transportation.

Explanation

Given information:

The in situ moist unit weight of a soil γ(in-situ) is 16.6kN/m3.

The moisture content w is 19 %.

The specific gravity of soil solids (Gs) is 2.69.

The minimum dry unit weight of soil γd(compacted) is 19.5kN/m3.

Calculation:

Determine the in situ dry unit weight of soil using the relation.

γd(insitu)=γ(insitu)1+w100

Substitute 16.6kN/m3 for γ(in-situ) and 19 % for w.

γd(insitu)=16.61+19100=13.95kN/m3

Determine the volume of soil to be excavated using the relation.

Vex=Vfill×γd(compacted)γd(insitu)

Here, Vfill is the volume of compacted fill.

Substitute 2,500m3 for Vfill, 19.5kN/m3 for γd(compacted), and 13.95kN/m3 for γd(insitu)

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Engineering Solutions

Find more solutions based on key concepts

Show solutions add

Determine the natural frequency of the system given in Example 8.1 if its mass is doubled.

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

Describe how to perform a starter bench test.

Automotive Technology: A Systems Approach (MindTap Course List)

Sketch a corner-rounding endmill.

Precision Machining Technology (MindTap Course List)

Briefly describe the differences between a credit, charge, debit and smart card.

Principles of Information Systems (MindTap Course List)

Describe the Big Data phenomenon.

Database Systems: Design, Implementation, & Management

Explain the differences among data, information, and a database.

Database Systems: Design, Implementation, & Management

What emergency steps should be taken to treat burns?

Welding: Principles and Applications (MindTap Course List)

List actions you should take if a mobile device displays a message that it is running low on memory.

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)