Dick McDonald Tunneling Safety & [email protected] April 20, 2006 1 LCLS...
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Dick McDonald Tunneling Safety & Logistics [email protected] .edu April 20, 2006 1 LCLS Conventional Facilities Dick McDonald Deputy Systems Manager
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Transcript of Dick McDonald Tunneling Safety & [email protected] April 20, 2006 1 LCLS...
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20061
LCLS Conventional Facilities
Dick McDonald
Deputy Systems Manager
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20062
Tunnel Safety & Logistics
Site Layout
Tunnel & Cavern X-Sections
Tunnel Safety
Tunnel Utilities
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20064
Tunnel Layout
RSY
UH TunnelLength = 575.5’Min cover = 20’Max cover = 60’
X-Ray TunnelLength = 645.4’Min cover = 40’Max cover = 80’
FEH CavernLength = 227’
Min cover = 80’Max cover = 100’
Access TunnelLength = 324’
Min cover = 20’Max cover = 100’
NORTH
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20065
FEH Cavern X-Section
FEH Cavern48.5’ Wide32.8’ High
16’ Rock dowels
Excavation Sequence #
Lattice Girder &12” Shotcrete
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20066
UH Tunnel X-Section
UH Tunnel 21’ Wide 18.5’ High
Concave invertdesigned to
resist uplifting
2’ thick + concavesection to increase
floor rigidity
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20067
Sequential Excavation & Support Cycle
1. Excavate with road header
2. Scale & prepare surface for shotcrete
3. Apply 3” shotcrete
4. Install girder section
5. Install rock dowels as required
6. Apply 3” shotcrete
7. Start next cycle
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20068
Top Heading & portal Support
Top heading with lattice girders
Portal support
Rock dowelsLattice girders
Shotcrete
Utilities
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 20069
Road Header at Work
50 ton Road Header
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200610
Load, Haul and Dump (LHD)
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200611
Shotcrete Pump
Pump can beat surface orunderground
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200612
Construction Safety Items
•Tunnel Safety
–Usual Safety Items
•Hard Hats
•Eye & Ear Protection
•Steel Toe Boots
•Above items are standard issue to employees & visitors entering construction areas.
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200613
Tunnel Safety Items
Tunnel Required PPE are issued to employees and visitors going underground
MSHA Approved LightMSHA = Mine Safety & Health Administration
Self RescuerConverts carbon monoxide to carbon dioxide
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200614
Tunnel Additional Required PPE
Self rescuer Cap lamp Rescuer and cap lamp in use
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200615
Tunnel Safety
Typical Tunnel HazardsTight working spaces, low lightUneven working & walking surfacesWet and muddyWorking in close proximity to large equipmentFalling rocks, earth and shotcreteUtility supply linesLack of ventilationNoiseMethane gas
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200616
Tunnel Classification
Tunnels are Classified as Gassy, Potential Gassy or Non gassy
Madera sandstone can have small isolated pockets of methane gas so our tunnels are potential gassy
Equipment and electrical have to be MSHA approved for potential gassy
We are not overly concerned about gas, but are taking the next step to be safe
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200617
Tunnel UtilitiesCompressed air – for pneumatic tools
Water – for tool use and dust control
Electrical power – for equipment & lighting
Ventilation – for fresh clean air
Communication & Data
Discharge water – excess water used in construction
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200618
15’ Tunnel
Typical tunnel utilities
Power & lights
Ventilation
Com. & Data
WaterAir
Discharge
Dick McDonald
Tunneling Safety & Logistics [email protected]
April 20, 200619
Typical Vent Fan and Lights
Vent fan & light stringer
