CIVIL ENGINEERING GEOTECHNICAL ENGINEERING MATLAB PROGRAMMING

1. Prepared by
ADNAN NAJEM LAZEM
Structural Engineering
(PhD Candidate)
DECEMBER, 2022
FOUNDATION
UNDERPINNING

2. A SEMINAR PAPER
ON
POST GRADUATE SEMINAR –III-
TOPIC:
ADVANCED FOUNDATION DESIGN / SOIL FOUNDATION UNDERPINNING
BY
ADNAN NAJEM LAZEM
TO
PROF. DR.
COLLEGE OF ENGINEERING -CIVIL ENGINEERING DEPARTMENT
STRUCTURAL ENGINEERING
DECEMBER, 2022

3. BETTER TOGETHER

4. TODAY’S SESSION
- What does a Foundation Underpinning mean?
- Different types of Underpinning
- Why do we use this technique & what does Bearing
enhancement look like?
- Examples of successful underpinning
- Identify our foundation bearing deficiency
- Next practical steps

5. Definition : As a general method it
involves the addition of structural
foundation units to give extra
support to structures at or below
grade
Purpose :
“its purpose being to
increase the support
of settling or
deteriorating
structures”

6. • Pit or Pier Underpinning
• Pile Underpinning
• Jacked Plies
• Pretest Plies
• Driven Piles
• Augured Caissons
• Grouted Piles
• Root Piles

7. Pit or Pier Underpinning
- Work Sequence is the essence? 30% or 50% ???

8. JACKED PLIES
Exercise 2: Why do
we use different
types of
Underpinnings?
Pro’s & Cons of different
types Jacked Piles?

9. CAISSONS PILES
Exercise :
SIZE IMPORTANT
YES / NOT
IN
Underpinnings?

10. AUGURED PILES
Exercise :
Effective
Technique ?
YES / NOT
Underpinnings?

11. GROUTED PILES
Exercise :
-Which TYPE OF
SOIL SUIT THIS
UNDERPINNINGS
?

12. ROOTS PILES
Exercise : Why do we use this type
of Underpinnings?

13. • Open new doors & meet new contacts
• Don’t be limited by your own Eng. resources
• Provide practical alternatives
• Raise Importance
• Grow & diversify membership
• Exposing Engineers to new experiences

14. ALWAYS SEEK PROFESSIONAL
“poorly designed or improvised underpinning increases the risks for the
owners and residents of adjacent buildings, as well as for the project owner
and design team, likely without the knowledge and consent of those parties”
Richard J. Driscoll, P.E.
Consulting Engineer

15. REFERENCES:
- Foundation Repair Manual, Robert Wade
Brown
- How would it help you growPractical
Foundation Engineering Handbook, 2nd
Edition, Robert Wade Brown
- Foundation Design: Theory and Practice, N.
S. V. Kamesware Rao
- Foundation Behavior and Repair, Robert Wade
Brown
- Structural Analysis of Historical
Constructions, Claudio Modena, P.B.
Lourenço, P. Roca
- Soil Mechanics Vol.1, Pile Buck
- Case Studies of Rehabilitation, Repair,
Retrofitting, and Strengthening of
Structures, Mourad M. Bakhoum
- NOTE: MANY REFERENCES WERE LISTED IN MY PRESENTED STUDY PAPER

16. Thank you & Questions?