Watt Avenue Light Rail Grade Separation - Precast / Prestressed ...
Watt Avenue Light Rail Grade Separation - Precast / Prestressed ...
Watt Avenue Light Rail Grade Separation - Precast / Prestressed ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Con-Fab Con Fab California Corporation<br />
<strong>Watt</strong> <strong>Avenue</strong> <strong>Light</strong><br />
<strong>Rail</strong> <strong>Grade</strong> <strong>Separation</strong><br />
Presented By:<br />
Justin Palmaymesa – Con-Fab Con Fab California Corp.<br />
Project Engineer<br />
October 15, 2008
Con-Fab Con Fab California Corporation<br />
Engineering and Detailing<br />
Fabrication<br />
Transportation<br />
Erection
Project Overview<br />
Provide transportation benefits to<br />
improve roadway safety.<br />
Provide a grade separation<br />
for light rail.<br />
Leave only heavy rail tracks at grade.<br />
<strong>Light</strong> rail tracks are used every<br />
15 minutes.
Site Conditions – Pre-construction<br />
Pre construction<br />
<strong>Light</strong> rail tracks<br />
<strong>Light</strong> rail tracks at grade.
Method of construction<br />
Use precast girders and slabs.<br />
Fabricate girders and slabs<br />
offsite.<br />
Transport product to the jobsite.<br />
Erect product by cranes.
Section View<br />
<strong>Light</strong> rail tracks<br />
<strong>Precast</strong> slab<br />
<strong>Precast</strong> girder<br />
Cross section view of bridge at mid-span. mid span.
Fabrication<br />
Form preperation for precast slabs.
Fabrication<br />
Slab form preparation – Form sealant.
Fabrication<br />
<strong>Precast</strong> slabs in storage.
Fabrication<br />
Single span precast prestressed girder<br />
containing post-tensioning post tensioning ducts.
Fabrication<br />
Placement of reinforcement.
Fabrication<br />
Girders poured in stages.
Fabrication<br />
Cutout in steel form.
Fabrication<br />
Use of skip bucket to pour tops of<br />
girders.
Size and Weight<br />
Girder dimensions – Width - 3’<br />
Height - 6’-7’<br />
Length - 75’-115 75 115’<br />
Girder weights – 161,500 – 265,000 lbs.<br />
19 School buses ≈ 265,000 lbs.
Storage<br />
Tracks for girder transfer.
Storage<br />
Storage tracks.
Storage<br />
Removal of Girders from forms.
Storage<br />
Winch used to move girders along track.
Storage<br />
Post Tension Ducts<br />
Post Tensioned Strand<br />
Girders showing post tensioned strand as<br />
well as post tension ducts.
Storage<br />
Typical girder in storage.<br />
Architectural Color
Section View<br />
Slab Bracing<br />
Section view showing temporary slab<br />
bracing.
Pre-erection<br />
Pre erection – still in storage<br />
Temporary slab support bracket - Wt.<br />
200lbs.
Pre-erection<br />
Pre erection – still in storage<br />
Installation of temporary slab supports.
Pre-erection<br />
Pre erection – still in storage<br />
Installation of temporary slab support.
Pre-erection<br />
Pre erection – still in storage<br />
Temporary supports torqued after<br />
installation.
Transportation<br />
Long, heavy loads were hauled<br />
on dollies.<br />
Girder transportation required the use of<br />
13 axle sets per load.<br />
Special permits were required<br />
for the loads.<br />
The use of pilot cars was<br />
required.
Transportation<br />
Girders loaded onto heavy-hauling<br />
heavy hauling<br />
trucks by cranes.
Transportation<br />
Stearable dollies used to maneuver<br />
tight corners.
Transportation<br />
Girder ready for transport.
Transportation<br />
Girder Loading.
Transportation<br />
Front Bunk<br />
Front dolly supporting <strong>Watt</strong> <strong>Avenue</strong><br />
girder.
Transportation<br />
Steer-able Steer able rear dolly.<br />
Rear Bunk
Transportation<br />
Additional pusher truck.
Erection<br />
Site erection performed at night.
Erection<br />
Lifting girder onto span 1.
Erection<br />
Final placement of span 1 girders.
Erection<br />
Final Installation of slab support.
Erection<br />
Girders in place with temporary slab<br />
supports.
Erection<br />
Slab placement.
Erection<br />
Longitudinal ducts<br />
Post Tensioning ducts in slabs.
Erection<br />
Transverse ducts<br />
Girders and slabs after placement.
Summary<br />
Total girders placed – 15<br />
Girder weights – 161,500 – 265,000 lbs.<br />
Girder dimensions – Width - 3’<br />
Height - 6’-7’<br />
Length - 75’-115 75 115’<br />
Total slabs placed – 120<br />
Total days of erection - 7
Benefits of precast girders<br />
Reduce the use of bulky false work.<br />
Minimize road closures.<br />
Shorter construction period.<br />
Reduce construction cost.
Expected Date of Completion<br />
The project is currently under<br />
construction.<br />
Expected date of completion in late<br />
2008.
THANK YOU FOR YOUR ATTENTION<br />
Con-Fab Con Fab California Corporation
Change language