TB 126 - Metro Gold Line Eastside Extension Const. Phase Flashcards
(19 cards)
The Metro Gold Line Eastside Extension (MGLEE) is an MTA tunneling project that will extend the existing Gold Line an additional __ miles from Union Station to Atlantic Boulevard
6
MGLEE features include:
• __ miles of Light Rail Service
6
MGLEE features include:
• __ stations (two underground)
8
MGLEE features include:
• _____ tunnels (1.8 miles long) Boyle Avenue to Lorena St.
Twin
MGLEE features include:
• Ride time from Union Station to Atlantic Station - ___ minutes
17
MGLEE features include:
• Operating hours from _____a.m. to ____ a.m.
4: 30
12: 30
The tunnel depth will be ___ feet below grade and it is anticipated that during the tunneling operation pockets of methane gas will be encountered
40
A __” water supply system provides cooling for the TBM and water for firefighting operations
4
This system is equipped with 2-1/2” NST outlets every ____ feet within the tunnel
200
Compromised atmospheres are the greatest risk in tunnel construction; intrinsically safe fans (__________CFM) provide ventilation and evacuate air from the tunnel through a 72- inch vent pipe
100,000
Excavation of earth is accomplished with a Tunnel Boring Machine (TBM), which is approximately ____ feet long and can tunnel up to ____ feet a day
300
100
A shield protects a ___’ area around the front of the TBM as it bores and when enough area has been excavated, hydraulic rams are retracted and a segmented concrete liner is installed. Once installed
20
__ 8-passenger diesel locomotives move the muck cars
2
Each locomotive is ___ feet long, five feet wide, weighs approximately 35 tons and is equipped with an on-board extinguishing system that the operator can activate from three different locations
21
Diesel fuel capacity is ___ gallons and fueling is done on-site.
75
A muck car measures ___’ long; __’ wide with ____’ high sides
15
5
6.5
A muck car has a empty weight of ____ pounds
9,000
A loaded car can weigh as much as _______ pounds
35,000
The Fire Department will respond to __ portal entries during the construction of the project
3
