Union Station Rail Corridor East Enhancements Project Transit - - PowerPoint PPT Presentation

Transit Project Assessment Process (TPAP) Public Meeting #2 Thursday May 3, 2018

Union Station Rail Corridor East Enhancements Project

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

St Study goal al: to determine existing noise and vibration levels due to rail corridor activities and provide mitigation recommendations

• Measurements conducted using the same rail equipment that regularly operates in

the rail corridor; the following equipment was measured:

USRC EAST ENHANCEMENTS PROJECT 2

• Idling GO train engine
• Hydraulic spiker
• Backup beeper
• Stabilizer
• Rail saw
• Vacuum truck
• Spiker
• Tamper
• Ballast dump
• All equipment operated at the worst-case location where possible (e.g. on the track

nearest to the residences)

• Where equipment could not operate at worst case location, measurements were

adjusted to represent the worst case

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

3 USRC EAST ENHANCEMENTS PROJECT

• Loudspeaker measurements conducted to determine performance of

existing façade elements (e.g. wall construction, windows, doors, etc.) and develop an outdoor-to-indoor noise e tran ansmi missi sion

• n model

el.

• Model is being calibrated based on the existing outdoor and indoor

equipment noise level measurements. Once the model is complete, it can incorporate various mitigation options and predict future interior noise levels from the equipment.

Indoor r noise Outd tdoor r noise se Noise e Transm nsmissi ission n Model el

• How to determine future interior noise

levels after noise mitigation? Loudspe speak aker er Mea easurem ements ents

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

4 USRC EAST ENHANCEMENTS PROJECT

Results: lts:

• Existing interior noise levels of up to 58 dBA due to rail corridor equipment
• Most significant noise sources: ballast dumping, stabilizer, train engine idling, rail saw and vacuum truck
• Existing vibration levels below structural damage threshold at all locations
• Existing vibration levels exceed threshold of human perception at 3 out of 4 assessed locations
• Most significant vibration source: stabilizer

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

5 USRC EAST ENHANCEMENTS PROJECT

NOI OISE LEVE SE LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

6 USRC EAST ENHANCEMENTS PROJECT

VIBRA VIBRATIO TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (2 (2ND

ND AN

AND 3 D 3RD

RD FL

FLOO OORS) RS)

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

7 USRC EAST ENHANCEMENTS PROJECT

VIBRA VIBRATIO TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (A (ADJUS JUSTED TED TO 1 O 1ST

ST FL

FLOO OOR) R)

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

8 USRC EAST ENHANCEMENTS PROJECT

VIBRA VIBRATIO TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (A (ADJUS JUSTED TED TO 1 O 1ST

ST FL

FLOO OOR) R)

• Measured floor vibration levels were just over the perceptibility threshold.
• Perceived vibration impacts are influenced by airborne transmission.

Second ndary ry glazing/ zing/ wind ndow upgr grade e

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

9

• Prelimina

nary ry noise e mitiga gati tion

• n opti

tions ns for r di discuss ussion

• n:
• Secondary glazing or window upgrade
• Door/frame upgrades
• Angled wall lining, beginning at mid-height of wall (due to

standing wave effect)

• In-fill lower half of sliding door opening
• Double glazed window, with potential secondary glazing; or
• Glazed wall on balcony edge in location of existing handrail,

extending almost to full height

USRC EAST ENHANCEMENTS PROJECT

Angled ed wall lining ing

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

10 10

• Prelimina

nary ry noise e mitiga gati tion

• n opti

tions ns for r di discuss ussion

• n (con
• nti

tinued ued):

• Balcony glazed wall
• No

Noise e wall l as an add dditi tion

• nal

al opti tion

• n will

ll be be reviewe wed for r fea easibili bility ty

• Prelimi

minary ary vibration ation mitiga gati tion

• n opti

tions

• ns for discuss

ssion:

• n:
• Administratively control locations and timings for vibration

intensive activities

• Repor
• rt

t recomm

• mmen

endati tions

• ns anti

tici cipa pated ted in June

USRC EAST ENHANCEMENTS PROJECT

Balcony ny glaze zed wall Noise e wall

NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT

11 11

• Open discussion
• Nex

ext steps:

• Please submit any comments or questions to: unionstationeast@metrolinx.com, by

May 17, 2018

USRC EAST ENHANCEMENTS PROJECT