Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

3 Problems Exam 1 - Advanced Soil Mechanics | CIVL 7132, Exams of Civil Engineering

Material Type: Exam; Professor: Meier; Class: Advanced Soil Mech; Subject: CIVL Civil Engineering; University: University of Memphis; Term: Fall 2008;

Typology: Exams

Pre 2010

Uploaded on 07/28/2009

koofers-user-y1r
koofers-user-y1r 🇺🇸

10 documents

1 / 3

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
1
CIVL 7132
Examination #1
Fall 2008
1. The 2:1 method provides a simple way to estimate the dissipation of applied surface stress
with depth. As presented in class, it can only be used with rectangular foundations. Develop
a 2:1 method for use with circular foundations and plot the influence factor as a function of
normalized depth (i.e., depth divided by foundation radius). These results will be needed for
the next problem.
2. A new bulk fuel storage tank is to be built at the Port of Belledune tank farm (below) in New
Brunswick, Canada. The tank will be built in a low-lying area prone to flooding. The existing
ground surface is 2 feet above sea level (el. 2.0) and will have to be raised to el. 18.0 before
constructing the tank. The fill material is a clayey sand. Standard Proctor compaction results
for the fill material are provided on Page 3. You will have to develop appropriate compaction
specifications for the fill. Clearly state these specifications.
Boring logs indicate 5 feet of desiccated clay crust (γsat = 123 lb/ft3) that can be assumed to
be incompressible. Below this is 50 feet of normally-consolidated silty clay (γsat = 109.5 lb/ft3)
underlain by dense sand (which can also be assumed to be incompressible). Consolidation
test results for the normally-consolidated silty clay are provided on Page 3. You will have to
develop a field consolidation curve from this data.
I hereby affirm that the work attached is entirely my own; I have neither given nor
received any help on this examination.
___________________ ___________________________________
Date Signature
pf3

Partial preview of the text

Download 3 Problems Exam 1 - Advanced Soil Mechanics | CIVL 7132 and more Exams Civil Engineering in PDF only on Docsity!

CIVL 7132

Examination # Fall 2008

  1. The 2:1 method provides a simple way to estimate the dissipation of applied surface stress with depth. As presented in class, it can only be used with rectangular foundations. Develop a 2:1 method for use with circular foundations and plot the influence factor as a function of normalized depth (i.e., depth divided by foundation radius). These results will be needed for the next problem.
  2. A new bulk fuel storage tank is to be built at the Port of Belledune tank farm (below) in New Brunswick, Canada. The tank will be built in a low-lying area prone to flooding. The existing ground surface is 2 feet above sea level (el. 2.0) and will have to be raised to el. 18.0 before constructing the tank. The fill material is a clayey sand. Standard Proctor compaction results for the fill material are provided on Page 3. You will have to develop appropriate compaction specifications for the fill. Clearly state these specifications.

Boring logs indicate 5 feet of desiccated clay crust (γsat = 123 lb/ft 3 ) that can be assumed to be incompressible. Below this is 50 feet of normally-consolidated silty clay (γsat = 109.5 lb/ft 3 ) underlain by dense sand (which can also be assumed to be incompressible). Consolidation test results for the normally-consolidated silty clay are provided on Page 3. You will have to develop a field consolidation curve from this data.

I hereby affirm that the work attached is entirely my own; I have neither given nor

received any help on this examination.

___________________ ___________________________________

Date Signature

Tank construction will begin once the underlying clay has reached 90% consolidation (which is estimated to be 2 years after construction of the fill is completed). The tank has a diameter of 80 ft and a height of 50 ft. When the tank is full, it will exert a pressure of 3000 psf on the surface of the engineered fill.

a. Calculate the total height of fill needed to bring the site to final grade (el. 18.0).

b. Calculate the expected settlement of the tank foundation once the tank is filled.

Clearly state any assumptions you have to make to solve this problem.

Incompressible Sand

Silty Clay (NC) γ sat = 109.5 lb/ft 3

Desiccated Crust

Dredged Fill

Storage Tank

el. 18.

el. 58.

el. 0.