Where will tremie pipe versus concrete pump be used - Florida's ...

shawlaskewvilleUrban and Civil

Nov 29, 2013 (3 years and 7 months ago)

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Florida’s Turnpike Materials

FIN
:
-----------



MSE Wall

Pre
-
operation Meeting




Items for Discussion


General




Who will be the superintendent
/ point of contact

in the
field?





Do we have approved shop drawings?

(Ensure that inspectors have a copy)



Wh
en
and where
will the
MSE Wall

construction

start?



Layout

the lo
cations

by surveyor
? Wh
ich firm will layout
?

Backfill Material



Which
independent lab will be
providing certified testing of the

backfill?
(sect. 548
-
2.6).
“Provide certification to the Engine
er, that the results have met the requirements of Section 548
and are signed and sealed by a Professional Engineer, registered in the State of Florida.”



What sources are currently chosen? Sources must be tested and approved.



Submit notice to Turnpike when
new backfill source is proposed with appropriate tests.



Limits of backfill extend 1 foot beyond reinforcing straps. This extends from top of
leveling pad to finish grade line.


Foundation Preparation



C
ompact the graded area with a vibratory roller weighin
g a minimum of 8 tons for at
least 5 passes.



Remove
and replace
any pre
-
existing soft/loose or clayey material, and tree
stumps/roots.

Per specs 548.
6
.3




C
ure the leveling pad a minimum of
12 hours before
placement of precast components.



Steps in leveling
pad; overhang of
panels
should not exceed
limits in shop dwgs.


Compaction Equipment & Methods



What equipment will be used w
ithin 3’

of wall face
?

Reme
m
ber
that it
should be less
than 1,000 lbs.


2



Vibratory rollers
and other construction
equipment weighing
more than 8 tons cannot be
closer than 3 feet to back of wall.



Distinguish the different compactive efforts (90%, 95%,100%) via pen colors or asterisk



Compacted Lift thickness shall not exceed 6”

Root Picking &
Rock Sizes



Roots/twigs/stems
must

be removed

prior to
compaction. Equipment operators need to
communicate with root pickers to avoid overlooking this.



Backfill material should meet spec 548
-
2.6 requirements including limiting the largest
particle size to 3
-
1/2 inches.

Wall
Panel
Installation



Assemb
le as recommended by the wall supplier.



Account for batter during wall panel assembly & compaction
. How are you planning to
measure

vertical plumpness and horiz
ontal alignment? S
hould be
within

¾” when
measured with 10 foot straight edge.



Horizontal/Verti
cal joints between p
anels

shall be between ½” and 1 ¼”



Remember that
filter
fabric adhesive shall
be applied
to the back of wall panels on both
sides of the joint and not

placed in joints.

Density Testing




Max Density (Proctor);
one

per soil type, by both
QC and Verification
. Must compare.



Density Test (nuclear gauge); QC performs set of tests per LOT. Verification performs
set of tests per 4 LOTS

Soil
Reinfor
cement



What type
of soil reinforcement
will be used
?

Steel Wire Mesh, Metal Strip,
or
Geosynthetic
?



If Geosynthetic
:

o

Where
will the geosynthtic material be

store
d
?

o

How will the material be protected from sunlight (UV degradation)?

o

Will the reinforcement be placed under tension during fill placement?


3



M
ethod of
reinforcement
attachment

must correspond to

that shown on shop drawing
.



Replace damaged straps

before applying more backfill.




Maintain a copy of your strap certifications.



Do not
deflect
reinforcements beyond 15 degrees.



How are you planning to keep the rainwater
runoff
away from the wall



gradin
g,
temporary drainage pipes etc
?


Treatment of
Structures
; Culvert & Pipe



For drainage pipes and structures within the MSE backfill reinforcement zone, apply the
MSE backfill density requirements

(in lieu of pipe backfill)
;

o

90% of Modified Proctor within
3’ of wall face

o

95% of Modified Proctor from 3’ wall offset to 1’ beyond reinforcement length




When a compaction operation is continuous and uniform between Pipes/Structures and
MSE wall backfill, one LOT may be identified for the density testing of both s
tructures.
Separate LOTs shall otherwise be identified for separate compaction operations.



CE&I




Who
are

the inspector
s
?




Question in th
e field


call Turnpike Office
:




Turnpike Materials Contacts:


Wing Heung
,
Lead Geotechnical Engineer (south FL)
:

954.
444.9742

Roger Gobin,
Geotechnical Engineer (
central

FL):

407.468.9325

Todd Kelly,
Earthwork Engineer:

407.286.8520

Jeff Yount,
Earthwork Manager
:
954.829.7186



Updated September

2012