Top of Shaft
Extend as required
Top of Shaft
Top of Shaft
(Typ) (See Bent
1
See Table for length L.
2
When steel does not extend the full shaft
Details or Common
length, the Contractor must demonstrate
Foundation Details
adequacy of the temporary support procedures
to the satisfaction of the Engineer.
(FD) standard)
3
Vertical bars may be supported on bottom of
drilled hole if material is firm enough to
Spiral
elsewhere in the plans.
bars as required
(See Bent Details or
Common Foundation
6"
~
~
Spiral Dia
~
Number and size of
Details (FD) standard)
Spiral
4" Band
at bottom
Remaining vertical
Termination
reinforcing may
of vertical
terminate here. 2
Drilled Shaft
Termination
Drilled Shaft
Drilled Shaft
Diameter
Diameter
reinforcing. 2
of vertical
reinforcing. 2
Bottom of Shaft 3
Bottom of Shaft 3
~
~
6"
6"
terminate here
One and a half flat turns top and bottom
reinforcing may
4'
-0" M ax
Half the vertical
Diameter
Provide spiral of the pitch and diameter shown
~
Length L
Spiral
2" Bands
Eq Spa at
Greater of 2L or
75 percent of plan shaft length
Length L
1
GENERAL NOTES:
All welded bands and reinforcing steel,
including that projecting the required amount
from the top of the shaft, are subsidiary to the
bid item, "Drilled Shafts".
Do not tack weld spiral to main steel in the
upper 15' of drilled shaft.
Bottom of Shaft 3
VERTICAL REINFORCING OPTION
LATERAL REINFORCING OPTIONS
(Lateral reinforcing not shown for clarity)
(Vertical reinforcing not shown for clarity)
SPIRAL DETAIL
4
These details may only be used for bridge
LENGTH L
Drilled Shaft
Diameter
foundations not in or adjacent to waterways.
They may only be used for multi-column bents
Length L
Note
and abutments, excluding abutments supported
by drilled shaft retaining walls. Other
(Inches)
(Feet)
The length L is measured
applications must receive approval of the
18 & 24
24
from top of shaft, natu-
Engineer.
30 & 36
30
ral ground, or finished
Typ
1
4
1
Typ
1
2
1
4
1
Typ
1
4
1
2
2
42 & larger
10 Shaft
Diameters
Bar
3
8
x 2
Bar
(ASTM-A36)
3
8
x 2
Bar
(ASTM-A36)
3
8
ground, whichever results
in the longer length of
full reinforcement.
Bridge
Division
Standard
x 4
(ASTM-A36)
OPTIONAL DRILLED
SHAFT REINFORCING
3
8"
Typ
(
Ty
p)
Max 3 per
Band
TOP
INTERIOR
BOTTOM
ODSR
FILE:
FILE:
The use of this standard is governed by the "
Texas Engineering Practice Act"
. No warranty of any
of this standard to other form ats or for incorrect results or dam ages resulting from its use.
kind is m ade by TxDOT for any purpose whatsoever. TxDOT assum es no responsibility for the conversion
1
ELEVATIONS
DATE:
DISCLAIM ER:
do so when concrete is placed
4
BAND DETAILS
C TxDOT
odsstde1.dgn
January 2015
DN:
TxDOT
CONT
SECT
CK: TxDOT
JOB
DW:
TxDOT
CK: TxDOT
HIGHWAY
REVISIONS
DIST
COUNTY
SHEET NO.