EGLINTON JUNIOR PUBLIC SCHOOL - Crosstown€¦ · Tunnel Boring Machine • The construction of new...
Transcript of EGLINTON JUNIOR PUBLIC SCHOOL - Crosstown€¦ · Tunnel Boring Machine • The construction of new...
EGLINTON JUNIOR PUBLIC SCHOOL
Jamie Robinson Director, Community Relations & Communications, Toronto Transit Expansion, Capital Projects Group May 2015
Agenda
• Eglinton Crosstown LRT Project • Mount Pleasant Headwall Construction • Mount Pleasant Station Concept • Tunnel Ventilation at LRT Stations • Property Requirement • Traffic Management During Construction • Impacts on Transit Users and Pedestrians
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MSF – Maintenance & Storage Facility
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Eglinton Crosstown LRT
Project • $5.4 B (2010$), funded by the Province of Ontario • 19 kilometres east-west LRT from Kennedy to
Jane/Black Creek, including 10 kilometres of tunnel • Connections to Yonge-University-Spadina Subway,
Scarborough RT and GO Stouffville • Up to 25 stations and stops
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Key Features and Timing
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West Tunnels / East Tunnel West Tunnels Contract: ECLC1-15 Contractor: Crosstown Transit Constructors Award Date: October 1, 2012 Final Completion: December 16, 2016
East Tunnel Contract: ECLC1-17 Contractor: Aecon-Dragados Joint Venture Award Date: October 21, 2013 Final Completion: November 6, 2016
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Tunnel Boring Machine
• The construction of new tunnels under Eglinton Avenue is done by tunnel boring machines (TBMs)
• Each TBM moves forward by pushing off against concrete segments it has placed behind it to line the tunnel
• The operator advances the machine as soil is removed from the TBM face through a conveyor system
• The launch pit remains active for removal of muck/spoils
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Sequence of Tunnel Drive
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Mount Pleasant Headwall Construction
Possible Jet Grout Plant location
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Jet Grout Rig
Jet grout rigs will be used for headwall construction at future stations and the extraction shaft at Yonge Street
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Jet Grout Plant - Sutherland / Donlea
Jet Grout rigs will be used for headwall construction at future stations, cross-passages and emergency exits.
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Timeline for Mount Pleasant Headwall Works
With appropriate permissions in place, Metrolinx’ contractor will: • Conduct some utility relocation before headwall construction • Install fencing and secure the perimeter • Install grout lines in the roadway • Jet grout plant will be set up prior to the headwall
construction • Begin Mount Pleasant headwall construction in late Summer
2015 • Approximately 4-6 months anticipated at each wall
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Mt Pleasant Station Preliminary Station Concept
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Mount Pleasant Station Longitudinal Section
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Mount Pleasant Station Primary Entrance
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Mount Pleasant Station Secondary Entrance
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West End TVF Plant
East End TVF Plant
Tunnel Ventilation at LRT Stations
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Above Grade Ventilation Requirements
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Passive Piston Action
Emergency Fan Boost
Typical Fan Plants
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Mt Pleasant Station Emergency Ventilation Shafts
• East emergency ventilation shafts will be combined with the Secondary Entrance building
• West emergency ventilation shafts will be a stand alone structure in the Brownlow Avenue boulevard
• Further analysis and detailed design will be completed by Project Co
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Example of TTC Vent Shaft at Bayview Station
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Example of TTC Vent Shaft at Bessarion Station
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Property Requirements
• Part 1 – Construction and maintenance access for ventilation shaft (permanent easement)
• Part 2 – Ventilation shaft equipment below grade (fee simple subsurface)
• Part 3 – Construction Staging (temporary)
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Property Requirements
• Part 1 – Construction and maintenance access for ventilation shaft (permanent easement)
• Part 2 – Ventilation shaft equipment below grade (fee simple subsurface)
• Part 3 – Construction Staging (temporary)
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Property Requirements
• TDSB has been engaged on the property requirements and discussions have been on-going with Metrolinx.
• Commencement date for permanent and temporary requirements is October 15, 2015.
• Duration is 4 years, plus an option to renew for 1 additional year.
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TDSB Proposed Alternative
• TDSB proposed an alternative vent shaft location
• Vent shaft would be on TDSB property instead of City property (shift from blue area to red area on drawing)
• Intent to reduce construction impacts to parking area and site operations
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Evaluation of TDSB Proposed Alternative • Vent shaft location proposed by TDSB – Pros:
– Closer to the station box – Could result in less disruption during construction
• Vent shaft location proposed by TDSB – Cons: – Vent shaft is more visible adjacent to the school and fronting on Eglinton – Vent shaft is closer to openings in the school buildings. The vent shaft must be a
minimum of 12 metres (horizontal distance) from any operable windows or 2.5 metres above any operable windows.
– Will cause permanent reduction in TDSB staff parking area – Depending on height of the vent shaft, it could block sightlines for service vehicles
entering and exiting the loading area – Could cause impacts to the existing school structure/ foundations – The work zone, including cranes and other large machinery, would be closer to the
school
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Evaluation of TDSB Proposed Alternative
• Based on preliminary design and engineering by Metrolinx, the Brownlow boulevard was determined to be the best location from a technical perspective
• The vent shaft location proposed by TDSB will not eliminate disruption to normal parking, garbage and deliveries during construction
• In the long term, the current vent shaft location selected by Metrolinx is better for TDSB as it does not permanently affect parking, garbage or delivery operations 28
Roles and Responsibilities
• Metrolinx is managing the construction project. • City reviews Metrolinx proposals for interim traffic control
measures during construction. • Toronto Police, City Transportation and Metrolinx meet
regularly to discuss issues and project needs such as enforcement, traffic management and parking.
• City is responsible for approving any temporary and permanent changes to turn restrictions, traffic calming, etc.
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Our Approach to Traffic Management
• Maintain a minimum of one lane eastbound and westbound on Eglinton in construction work zones
• Buses and general traffic will share this lane • Additional lanes will be provided if space allows • Metrolinx will work with City of Toronto Transportation,
local elected officials and neighbours to monitor local traffic
• Signal timing may be modified and turning restrictions may be added or relaxed to improve the flow
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Traffic Lane Reductions
Temporary road closure, local traffic only
Traffic reduced to one lane in each direction
Proper City permitted traffic signage will be installed
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Transit Services during Tunnel Construction
• Both eastbound and westbound TTC stops in the affected area may be shifted and relocated for the safety of transit riders
• Watch for TTC posted signs indicating the adjusted stop locations
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Pedestrians
• In the construction zone, for temporary sidewalks or existing sidewalks the goal is to maintain minimum 1.5 metre sidewalk widths wherever possible
• Access to properties from sidewalks should be maintained
• Some sections of sidewalk may be closed and crossings will be available at traffic signals
• Please take care when travelling near construction. Watch for additional signage directing pedestrians
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Pedestrian Detours
Sign directing pedestrians Temporary detour of pedestrian sidewalks may be required
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Crosstown Community Relations Team
East Community Office 660 Eglinton Avenue East (Sunnybrook Plaza at Bayview and Eglinton, next to Home Hardware) E-mail: [email protected] Online: www.thecrosstown.ca Tel: 416-482-7411
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