Chapter 11, Problem 11.21P

BuyFind*arrow_forward*

9th Edition

Braja M. Das + 1 other

ISBN: 9781305970939

Textbook Problem

Refer to figure 11.48. A square foundation, 2.5 × 2.5 m in size, supports a column load of 478 kN. The soil characteristics are given in the figure. Field monitoring indicated that the foundation settlement was 46 mm at the end of 2 years.

**a.**Estimate the average stress increase in the clay layer due to the applied load.**b.**Estimate the primary consolidation settlement.**c.**What is the degree of consolidation after 2 years?**d.**Estimate the coefficient of consolidation for the pressure range.**e.**Estimate the settlement in 3 years.

(a)

To determine

Calculate the average stress increase in the clay layer due to the applied load.

Explanation

**Given information:**

The foundation load

The length of the foundation

The breadth of the foundation

The depth of foundation

The height of the clay layer 1

The height of the clay layer 2

The dry unit weight of sand

The saturated unit weight

The liquid limit

**Calculation:**

Consider the unit weight of water

Calculate the distributed load

Substitute *P*, *B*, and *L*.

Calculate the increase in vertical stress

Here,

For the depth

Calculate the width

Substitute *B*.

Calculate the ratio

Substitute *L* and *B*.

Calculate the ratio

Substitute *b* and *z*.

(b)

To determine

Calculate the primary consolidation settlement.

(c)

To determine

Calculate the degree of consolidation after 2 years.

(d)

To determine

Calculate the coefficient of consolidation for the pressure range.

(e)

To determine

Calculate the settlement in 3 years.

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

Fundamentals of Geotechnical Engineering (MindTap Course List)

Mechanics of Materials (MindTap Course List)

Database Systems: Design, Implementation, & Management

Principles of Information Security (MindTap Course List)

Cornerstones of Financial Accounting

Database Systems: Design, Implementation, & Management

Precision Machining Technology (MindTap Course List)

Fundamentals of Information Systems

Automotive Technology: A Systems Approach (MindTap Course List)

Principles of Information Systems (MindTap Course List)

Fundamentals of Information Systems

Solid Waste Engineering

Management Of Information Security

EBK ELECTRICAL WIRING RESIDENTIAL

Systems Analysis and Design (Shelly Cashman Series) (MindTap Course List)

Electric Motor Control

International Edition---engineering Mechanics: Statics, 4th Edition

Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)

Steel Design (Activate Learning with these NEW titles from Engineering!)

Automotive Technology

Structural Analysis

Welding: Principles and Applications (MindTap Course List)

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

Network+ Guide to Networks (MindTap Course List)