Union Station Rail Corridor East Enhancements Project Transit Project Assessment Process (TPAP) Public Meeting #2 Thursday May 3, 2018
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: Idling GO train engine Hydraulic spiker Backup beeper o o o Stabilizer Rail saw Vacuum truck o o o Spiker Tamper Ballast dump o o o 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 USRC EAST ENHANCEMENTS PROJECT 2
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT How to determine future interior noise • Loudspe speak aker er Mea easurem ements ents levels after noise mitigation? 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 on model el. Model is being calibrated based on the existing outdoor and indoor • Outd tdoor r noise se equipment noise level measurements. Once the model is complete, it Indoor r noise can incorporate various mitigation options and predict future interior noise levels from the equipment. Noise e Transm nsmissi ission n Model el USRC EAST ENHANCEMENTS PROJECT 3
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT 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 • USRC EAST ENHANCEMENTS PROJECT 4
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT NOI OISE LEVE SE LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS USRC EAST ENHANCEMENTS PROJECT 5
NOISE NO ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT VIBRA VIBRATIO TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (2 (2 ND ND AN AND 3 D 3 RD RD FL FLOO OORS) RS) USRC EAST ENHANCEMENTS PROJECT 6
NOISE NO ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT VIBRA VIBRATIO TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (A (ADJUS JUSTED TED TO 1 O 1 ST ST FL FLOO OOR) R) USRC EAST ENHANCEMENTS PROJECT 7
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT VIBRATIO VIBRA TION LEVEL LEVEL MEA MEASU SURE REMEN MENT RE RESU SULTS TS (A (ADJUS JUSTED TED TO 1 O 1 ST ST FL FLOO OOR) R) Measured floor vibration levels were just over the perceptibility threshold. • Perceived vibration impacts are influenced by airborne transmission. • USRC EAST ENHANCEMENTS PROJECT 8
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGATION MITIGA TION AS ASSESSMENT SESSMENT Prelimina nary ry noise e mitiga gati tion on opti tions ns for r di discuss ussion on: • Secondary glazing or window upgrade o Door/frame upgrades o Second ndary ry glazing/ zing/ wind ndow upgr grade e Angled wall lining, beginning at mid-height of wall (due to o 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, Angled ed wall lining ing extending almost to full height USRC EAST ENHANCEMENTS PROJECT 9
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGATION MITIGA TION AS ASSESSMENT SESSMENT Prelimina nary ry noise e mitiga gati tion on opti tions ns for r di discuss ussion on (con onti tinued ued): • Balcony glazed wall o Balcony ny glaze zed wall No Noise e wall l as an add dditi tion onal al opti tion on will ll be be reviewe wed for r fea easibili bility ty • Noise e wall Prelimi minary ary vibration ation mitiga gati tion on opti tions ons for discuss ssion: on: • Administratively control locations and timings for vibration o intensive activities Repor ort t recomm ommen endati tions ons anti tici cipa pated ted in June • USRC EAST ENHANCEMENTS PROJECT 10 10
NO NOISE ISE & & VIBRA VIBRATION TION – REC RECEP EPTOR OR BASED BASED MITIGA MITIGATION TION AS ASSESSMENT SESSMENT Open discussion • Nex ext steps: • o Please submit any comments or questions to: unionstationeast@metrolinx.com, by May 17, 2018 USRC EAST ENHANCEMENTS PROJECT 11 11
Recommend
More recommend
