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LIMITS OF
REINFORCING FABRIC
I_____________________-
1
1
1
1
1
m 1
1 -
1 0
1 a
1
1
LL
-------___-------------------
3'- 0 REINFORCMENT
cl) UD DIRECTION (RD) j
------ -- -------------------I
m m
CROSS REINFORCMENT
DIRECTION (CRD)
I
I
I
I
I
Di AM
VARIABLE LENGTH
FRONT ELEVATION
REINFORCING FABRIC
WALL
HEIGHT
H
(fit)
REINF.
LENGTH
B
(fit)
ULTIMATE
TENSILE
STRENGTH
(lb/ft)
< 4
6
2400
4 TO 6
6
3000
6 TO 8
= H
3600
8 TO 10
= H
4500
NOTES:
1. REINFORCED SANDBAG HEADWALLS ARE BASED ON THE FOLLOWING ASSUMPTIONS:
1) TRAFFIC SURCHARGE IS 240 PSF OR LESS AND BACKSLOPE IS 2:1 OR FLATTER.
2) GRADE IN FRONT OF WALL IS 6:1 OR FLATTER
3) MAXIMUM APPLIED BEARING PRESSURE IS LESS THAN 1 TSF.
2. REINFORCED SANDBAG HEADWALLS ARE BASED ON THE FOLLOWING IN -SITU SOIL PARAMETERS:
1) UNIT WEIGHT = 120 PCF
2) FRICTION ANGLE = 30 DEGREES
DO NOT USE REINFORCED SANDBAG HEADWALL DETAIL WHEN ASSUMED SOIL
PARAMETERS ARE NOT APPLICABLE OR WHEN VERY LOOSE OR SOFT SOIL OR
MUCK IS PRESENT BELOW BOTTOM OF PIPE.
3. PLACE REINFORCEMENT IN SLIGHT TENSION AND FREE OF KINKS, FOLDS, WRINKLES AND CREASES.
4. DO NOT SPLICE REINFORCEMENT IN THE REINFORCEMENT DIRECTION (RD).
SEAMS ARE ALLOWED IN THE CROSS -REINFORCEMENT DIRECTION (CRD).
5. BACKFILL IN ACCORDANCE WITH SECTION 235 OF THE STANDARD SPECIFICATIONS.
DO NOT BACKFILL WITH ROCK, BROKEN PAVEMENT OR SIMILAR MATERIAL.
DO NOT DAMAGE REINFORCEMENT WHEN PLACING AND COMPACTING BACKFILL.
DO NOT USE SHEEPSFOOT, GRID ROLLERS OR OTHER TYPES OF COMPACTION EQUIPMENT WITH FEET.
DO NOT OPERATE HEAVY EQUIPMENT ON REINFORCEMENT UNITL IT IS COVERED WITH
AT LEAST 10" OF BACKFILL.
USE ONLY HAND OPERATED EQUIPMENT TO COMPACT WITHIN 3 ft OF THE HEADWALL FACE.
6. #4 REINFORCING BARS (GRADE 60) 24" LONG MAY BE SUBSTITUTED FOR 8" SPIKES.
DRIVE #4 BARS THRU 4 BAGS MAXIMUM.
7. HEADWALL DIMENSIONS MAY BE ADJUSTED FOR SINGLE, DOUBLE OR MORE
PIPES AS SHOWN IN PLANS.
SANDBAG PLAN VIEW
2'-0" 4'-0"
EACH BAG CONNECTED
WITH 4 - 8" SPIKES
84"CSP
REINFORCING
FABRIC
x
a
N
I
B
SIDE ELEVATION
INLET
END
SANDBAG
HEADWALL
AREA =
534
S.F.
OUTLET
END
SANDBAG
HEADWALL
AREA =
376
S.F.
J�OFES S
SEAL
022966
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