120 inch steel penstock - home | asce · 2016-08-09 · of the wye 7 ’-6’’ 16’-3 ......
TRANSCRIPT
120 inch steel penstock
120 inch steel penstock
Bechtel Award PresentationWye Section Outside the tunnel directing the
flow from the Olivenhain Reservoir to the power
generation and returning the pumped flow from
Lake Hodges back to Olivenhain Reservoir.
8/9/2016 4
Dimensions and Baseline Model of the Wye
7’-6’’ 16’-3’’ 18’-0’’ 5’-0’’
30’’
150’’
Pipe wall = 1.25” thick
Crotch plates = 7.00” thick
121½’’ ID
84’’ ID
84’’ ID
Height of crotch plates over the pipe
surface is 30.0” at intersection point.
Bechtel Award Presentation
6
Maximum Principle Stresses in Cylinder and
Crotch Plates with 16-inch- diameter Steel Tube
7
Plastic Strain in Crotch Plate at Bifurcation, Figure 15
• Negligible plastic yielding may occur only at one location in the 7” thick crotch plates (at the bifurcation)
• Adding tube reduces the maximum plastic strain
No tube 16” OD tube at intersection
Max pl. strain 0.27% 0.135%
Plastic yielding on
upper edge is eliminated
by adding the tube
132 inch-Diameter ECIS & 96 inch Diameter
NEIS Sewer Tunnel Projects
8
132 Inch Diameter ECIS Sewer Tunnel Project
10
Bechtel Award Presentation
Henry H. Bardakjian, P.E Consulting Engineer, Glendale, CA. Email: [email protected]
A Hand- Mined Hole is Dug for the
Future Lateral outlet
The Lateral Outlet is Pushed on Rail in the
Dug Hole
A Lateral Branch is being Welded to the Main
Steel Body
The Lateral is Welded to the Stiffened
Steel Main Body in the Tunnel
132 inch X 96 inch Tangential Junction at 30 Degrees Between ECIS and NEIS Projects
96-inch Branch for the Junction Fitting
18
Thank you for Listening