Melbourne Metro Rail Project Matthew Stead Noise, Vibration & EMI from MMRP at the University of Melbourne 14 September 2016
Outline • Expertise • EES issues at University of Melbourne • Gaps in IAC EPRs V1/2 • Conclave EPRs • Example of issues
Expertise – Matthew Stead • Sensitive equipment/ facilities for variety of Universities and Hospitals (Adelaide, Monash, Curtin, Queensland, RMIT, Sydney, Deakin, Wollongong, RPAH, POWH for example) • Large infrastructure (Eastlink, Port Capacity Project and Channel Deepening EES for example) • Worked as consultant for end clients, designers and contractors (noise, vibration & EMI) • Advisor for Universities and Hospitals where sensitive facilities impacted by third party infrastructure.
Project Delivery Model • Availability based Public Private Partnership (PPP) – Tunnels and Stations • Competitive Alliance (CA) – Systems/ Infrastructure • Understand that it will be a requirement to comply with the Environmental Performance Requirements (EPRs) for PPP and CA. Mitigation to be provided where EPRs can not be met.
Key Gaps and Issues in EES • Electro Magnetic Interference – not addressed. • Noise impacts on sensitive equipment – not addressed. • Trigger for management actions related to day time noise impact for occupied areas – not addressed. No assessment of effects on UoM occupants. • Future flexibility – not addressed. • Vibration limits for bio resources – not formalised in EPR. Issues with blasting. • Noise limits for ventilation and mechanical systems at non residential locations – not formalised in EPR. • Low frequency operational vibration not assessed (less than 10 Hz).
Key EPR Issues at University of Melbourne (EPR IAC v 1 & 2) • NV5 – Include a day time management trigger level for occupied spaces at UoM. • NV10 – Include equipment airborne noise limits and equipment specific limits for sensitive equipment when in use. • NV11 – Expand to cover educational institutions for ground borne construction noise. • NV12 – Expand to prevent impact on bio resources for blasting. • NV13 – Include vibration limit for bio resources. No impact to bio resources. • NV16 – Expand to address mechanical plant and ventilation noise at educational institutions • NVA - Not clear what the mechanism is for the Parkville Precinct Reference Group to address impacts. • EMI – No current EPRs.
Conclave agreement – relevant EPRs • NV1/NV 5 – Include a day time management trigger level for occupied spaces – Not agreed. Consideration to be given by the IAC . • NV10 – Include equipment airborne noise limits and equipment specific requirements. Increased factor of safety for trackform vibration isolation. Agreed. • NV11 – Expand to cover educational institutions for ground borne noise. Agreed. • NV12 – Expand to prevent impact to bio resources for blasting. Agreed. • NV13 – Application of limit and no impact to bio resources. Agreed. Include specific vibration limit for bio resources. Consideration to be given by the IAC . • NV16 – Expand to address mechanical plant and ventilation noise at educational institutions. Agreed. • NVA – Update. Consideration to be given by the IAC . • EMI – No MMRA experts. No agreement .
Example - Why day time noise is important NV5 • Academic, research and teaching activities requires concentration and clear aural communication. • Potential for noise to disrupt concentration and communication. • Current EPR’s don’t include a day time trigger or management noise level for non residential receivers. Effects not assessed in EES. • Extended duration of construction activity (prior to acoustic sheds and acoustic hoarding). • Close proximity of noise sources to Medical Building, Peter Doherty and Alan Gilbert buildings (from 5m). • Façade upgrades considered to be reasonable and feasible.
Medical Building PDI Alan Gilbert
Indicative construction of Parkville Station • Extended duration of construction activity (prior to acoustic sheds and acoustic hoarding). • Bored piers (nominal 9 months) • Cut & cover (nominal 6 months)
Indicative construction of Parkville Station
Why day time noise is important NV5 • Estimated piling rig 111 dB(A) sound power level (exclude vibratory and impact). Estimated excavator 107 dB(A) sound power level. • Distance from around 5 to 15 m for up to 15 months estimated • Simplistic noise modelling suggests up to 80 to 90 dB(A) • Assumed façade noise reduction 20 to 30 dB(A) noting weaknesses in Medical Building façade glazing • Internal levels up to 50 to 70 dB(A) for extended periods Possible day time noise triggers at UoM: • EPA 1254 – none. • AS2107 + 5 dB suggests 45 dB(A) for working labs/ office spaces • City of Melbourne – 75 dB(A) external/ L90 + 10 dB(A) • NSW ICNG/ TfNSW – 45 dB(A) or 2107 maximum Façade upgrades considered to be reasonable and feasible if at-source mitigation is not sufficient. No detailed assessment available.
Example - Peter Doherty Institute – Transmission Electron Microscope NV10 (PDI TEM) • FEI Tecnai G2 Spirit (0.2 nm resolution) • Vibration, EMI & Noise Sensitive • Cumulative impact • Very close proximity • Some additional vibration mitigation in place (unknown performance) • EMI active mitigation in place
PDI TEM
PDI TEM Approximate TEM Location (basement)
Tecnai TEM • Typical Tecnai factory acceptance test. • Lower image shows Graphitised Carbon and the atomic layers (0.344nm spacing) in the material are visible in all directions. • Upper right FFT represents the sample image in frequency space equal to 0.344nm.
< ·~· ~ J: i-~-~ > FEI COMPANY Ma gnetic fields 3.6 Too $ fOR NANOTECH 3.6.1 Ma gne tic field specification It is important when placing the microscope to avoid locations subj ect to strong magnetic fields. The microscope is most affected by stray fields in the horizontal plane. The magnet ic field specifications are shown in Table 3-3 T ype Ho riz on ta l (x , y) V ert i ca l (z) Tecnai 12 lWI N 350nT p-p 650nTp-p Tecnai 12 BiolWI N 440n Tp-p 185nT P-P Table 3-3 Magnetic Field Specificati on These specifications include slow varying magnetic fiel ds and/ or Near DC Fields (caused by elevators, trams and trains). This specification must be met for the total room in which the microscope is to be located, but is especially critical at the following l oc ations: Pos ition and hei ght of the GIF (if present) Height of the gun He i ght of the goniometer • • • 3.8.4 Acou stic • • • • Tecnai G2 Spirit • • • • . . • • • • • Pre-install at ion . Sfliril T'hin; TEI.I ine res. 0. 204 nm Ac<>usties Syste m Tecnai 02 4022 190 50699 Modification date : December 5, 2013 n Ill 60 !. -t---+-+--+--1-- ...... --. • -.-+--.--<--t---+ m "' ~ 5 II 3S 1/3 octaw !Hz) Fig. 3-7: A co usti c Guid el ine s
-: _ · _rE_ M _ l _nc_ro~ s - . 0_2_C1~_rvn_~-~ F - lo _ r · ~· _ -t _ ~ BQ _ C _ k ~ ,.-, r" tem _ T _ ec _Ml_ G2 - Spitit - · · _ r _ "i _ n . 2 _ 0 ~ 4rvn -~ · ·~· _1n;_ ,. Fr _ ont Sy_sc_em~T-e<_nao_G2_s_p1_1_ ~ , ~ 10 :- FEI COMPANY - 3.8.3 Floor Vibration - Vertical Too fOR NANOTECH ___ __ Aoot ¥_e111Ca1 __ • • • 1 /3 octave <Hz) • • • • Tecnai G2 Spirit Fig . 3-6: Floor Vibration - Vertical Guidelines • • • • • • • • • Pre-installation • • • 3.8.1 Floor Vibration - Front to Back 4022 190 50699 Modification da te: December 5, 2013 _ : _ T _ H ~ l - lin ~ c r C$ _ . o _ 1 0 ".- ' ·· ' :---· .. ,, , ·'·' ~+· ... 1 : ' i .... ·: · ···- ··•· ... ,. ·+· .•.• .• . ....... . ; 10 113 cctave (Hz) Fig. 3-4: Floor Vibration - Front to Back Guidelines
PDI TEM – specification converted to velocity
Peter Doherty Institute – Transmission Electron Microscope (Technical Note 32A)
PDI TEM – Conclusion • Some additional mitigation in place (unknown performance) • Noise impact from MMRP unknown • Vibration likely to exceed limits for unknown period • EMI impact unknown and may exceed possible mitigation capability • Possible cumulative impact • Further consultation & mitigation options to be agreed (possible reference mitigation design).
Example - Additional UoM Equipment Helium Ion Microscope/ FIB – CfNE Confocal – Medical Building
Example - Operational Vibration • Vibration less than 10 Hz not considered • PDI TEM more sensitive in range < 10 Hz. • Generic rather than specific equipment criteria in EES
Operational Vibration
Example - Bio resources • Refer previous University of Melbourne submissions • Consultation and scheduling not reasonable and practical
Example - Why EMI is important – example image without/ with interference
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