A Down Dirty Overview John Davis PEDenise Richards PEApril252016Credits earned on completion of this course will be reported to AIA CES for AIA members Certificates of Completion for both AIA members ID: 887642
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1 Underpinning 101 A Down & Dirty O
Underpinning 101 A Down & Dirty O
2 verview John Davis, PE Denise R
verview John Davis, PE Denise R
3 ichards, PE April 25, 2016 Credit
ichards, PE April 25, 2016 Credit
4 (s) earned on completion of thi
(s) earned on completion of thi
5 s course will be reported to A
s course will be reported to A
6 IA CES for AIA members. Certif
IA CES for AIA members. Certif
7 icates of Completion for both A
icates of Completion for both A
8 IA members and non - AIA members
IA members and non - AIA members
9 are available upon request . T
are available upon request . T
10 his course is registered with AI
his course is registered with AI
11 A CES for continuing professiona
A CES for continuing professiona
12 l education. As such, it does no
l education. As such, it does no
13 t include content that may be d
t include content that may be d
14 eemed or construed to be an appr
eemed or construed to be an appr
15 oval or endorsement by the AIA o
oval or endorsement by the AIA o
16 f any material of construction o
f any material of construction o
17 r any method or manner of handlin
r any method or manner of handlin
18 g , using, distributing, or deal
g , using, distributing, or deal
19 ing in any material or product .
ing in any material or product .
20 _________________________________
_________________________________
21 ______ ____ Questions related to
______ ____ Questions related to
22 specific materials, methods, and
specific materials, methods, and
23 services will be addressed at t
services will be addressed at t
24 he conclusion of this presentati
he conclusion of this presentati
25 on. Learning Objectives ⢠Learn
on. Learning Objectives ⢠Learn
26 the basic principles of underpi
the basic principles of underpi
27 nning. ⢠Understand the proper
nning. ⢠Understand the proper
28 techniques of âapproach pitâ
techniques of âapproach pitâ
29 underpinning for wall foundati
underpinning for wall foundati
30 ons. ⢠Understand how not to do
ons. ⢠Understand how not to do
31 approach pit underpinning. â¢
approach pit underpinning. â¢
32 Review techniques for individual
Review techniques for individual
33 spread footing underpinning. â
spread footing underpinning. â
34 ¢ Review alternative underpinnin
¢ Review alternative underpinnin
35 g/foundation modification techni
g/foundation modification techni
36 ques. Without a solid foundationâ
ques. Without a solid foundationâ
37 ¦ London, 2014 Toronto, 2014 Tor
¦ London, 2014 Toronto, 2014 Tor
38 onto, 2014 On a Larger Scale⦠M
onto, 2014 On a Larger Scale⦠M
39 inard Hall, North Dakota State,
inard Hall, North Dakota State,
40 2009 un·der·pin·ning [ uhn - der
2009 un·der·pin·ning [ uhn - der
41 - pin - ing ] â verb (used with![-
pin
-
ing
]
â
verb (used with](887642/pin-ing-verb-used-with.jpg "-
pin
-
ing
]
â
verb (used with")
- pin - ing ] â verb (used with
42 object) 1. the introduction of a
object) 1. the introduction of a
43 dditional support to the foundati
dditional support to the foundati
44 on of a structure to deepen or i
on of a structure to deepen or i
45 ncrease its bearing value. a. if
ncrease its bearing value. a. if
46 done because the foundation is in
done because the foundation is in
47 adequate, it is called remedial
adequate, it is called remedial
48 underpinning. b. if done to deepe
underpinning. b. if done to deepe
49 n a foundation to enable adjacent
n a foundation to enable adjacent
50 , lower construction, it is call
, lower construction, it is call
51 ed precautionary underpinning. 1
ed precautionary underpinning. 1
52 1. Edward E. White (1913 - 1988)
1. Edward E. White (1913 - 1988)
53 , Spencer White and Prentis, Inc.
, Spencer White and Prentis, Inc.
54 In the Code 2012 IBC Section 18
In the Code 2012 IBC Section 18
55 04.1 - Excavations for any purp
04.1 - Excavations for any purp
56 ose shall not remove lateral sup
ose shall not remove lateral sup
57 port from any footing or foundati
port from any footing or foundati
58 on without first underpinning or
on without first underpinning or
59 protecting the footing or found
protecting the footing or found
60 ation against settlement or late
ation against settlement or late
61 ral translation. Historic Buildi
ral translation. Historic Buildi
62 ng Foundations ⢠Prevalent in P
ng Foundations ⢠Prevalent in P
63 hiladelphia housing ⢠Rubble st
hiladelphia housing ⢠Rubble st
64 one foundations without footings
one foundations without footings
65 ⢠If exposed or undermined, mo
⢠If exposed or undermined, mo
66 re susceptible to instability or
re susceptible to instability or
67 sudden failure Most Common Type
sudden failure Most Common Type
68 of Precautionary Underpinning â
of Precautionary Underpinning â
69 Approach titâ: underpinning i
Approach titâ: underpinning i
70 n order to lower the foundation b
n order to lower the foundation b
71 earing level to enable adjacent
earing level to enable adjacent
72 lower construction . Theory of Ap
lower construction . Theory of Ap
73 proach Pit Underpinning ARCHING O
proach Pit Underpinning ARCHING O
74 F WALL OVER APPROACH PIT TYPICAL
F WALL OVER APPROACH PIT TYPICAL
75 STRESS PATH 1. Plan the sequenc
STRESS PATH 1. Plan the sequenc
76 e 2. Initial Excavation 3. Star
e 2. Initial Excavation 3. Star
77 t âApproach Pitâ 4. Install
t âApproach Pitâ 4. Install
78 Lagging and Extend Shaft Under Fo
Lagging and Extend Shaft Under Fo
79 oting 5. Place Concrete and Dryp
oting 5. Place Concrete and Dryp
80 ack 5a. Or Extend Shaft to Depth
ack 5a. Or Extend Shaft to Depth
81 Needed Then Place and Drypack
Needed Then Place and Drypack
82 Underpinning Plan Exceptions to t
Underpinning Plan Exceptions to t
83 he Rule Non Continuous Approach P
he Rule Non Continuous Approach P
84 it Underpinning Individual Sprea
it Underpinning Individual Sprea
85 d Footing Underpinning Temporary
d Footing Underpinning Temporary
86 Footings & Support Beams How No
Footings & Support Beams How No
87 t to Underpin Second/Third Floor
t to Underpin Second/Third Floor
88 Window Third/Fourth Floor Windo
Window Third/Fourth Floor Windo
89 w Fourth/Fifth Floor Window Fift
w Fourth/Fifth Floor Window Fift
90 h Floor Window/Parapet Cracking
h Floor Window/Parapet Cracking
91 also appeared on the interior an
also appeared on the interior an
92 d through the wall finishes. Re
d through the wall finishes. Re
93 pairs completed tied the wall ba
pairs completed tied the wall ba
94 ck to the interior framing or t
ck to the interior framing or t