Details of anti noise walls - june 15 2016 - nouveau pont champlain

›Details of Anti-Noise Walls ›City of Montreal

New Champlain Bridge Corridor Project

June 15, 2016


Presentation Outline

1. Noise study

2. Visual and urban integration of the

anti-noise walls

2


Verdun

L’Île-des-Soeurs

Sud-Ouest

Impact study criteria for selecting sensitive areas: - Residential and institutional areas

- Areas located in a 300-metre radius of expressways and on-ramps

Areas under Review

Base map: Utilisation du sol 2014, Communauté métropolitaine de Montréal

Agglomération de Montréal feuillet 66-08-US 2014

Areas under Review

3


Noise Criteria

Definition of ambient noise

• Audible noise recorded prior to the project

• Measured over a 24-hour span (Leq 24 h)

• Used to establish the project's noise criteria

Noise criteria for the project

The average sound level over 24 h (Leq 24 h) generated by expressways

and on-ramps must not exceed:

• 55 dBA if the initial ambient noise was below 55 dBA

• An increase of 1 dBA if the initial ambient noise was between 55 and

59 dBA

• 60 dBA if the initial ambient noise was greater than or equal to

60 dBA

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Noise Criteria

Project noise

• Noise modelled for 24-hour periods (Leq 24 h)

• Based on the following key data:

Average daily traffic in summer in 2050

Design of expressways and their on-ramps

Type of asphalt

Speed

Topography

Mitigation measures

• Must mitigate noise from expressways and on-ramps in 2050 for

compliance with noise criteria

• The goal is not to mitigate the noise from other sources (trains,

factories, provincial and municipal roads, etc.)

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Initial Ambient Noise (May 2015) LaSalle/Wellington Area

M1

M2

M3

Railways

LaS

all

e

Sensitive area

- Residential

- Institutional

- Public park

6


Initial Ambient Noise (May 2015)

L’Île-des-Soeurs Area

I1

I2

I3

Sensitive area

- Residential

- Institutional

- Public park

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1. (T): noise transmitted through the wall (negligible)

2. (D): noise diffracted on the edges of the wall

3. (A) and (R): noise absorbed and reflected by the wall

Sourc

e:

Cité

acoustique,

Univ

ers

ité

du M

ain

e,

Fra

nce

How an Anti-Noise Wall Works

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Assessment of Project Noise in 2050 --- without Anti-Noise Walls

M1

M2

M3

9


Assessment of Project Noise in 2050 --- with Anti-Noise Walls

Concrete barrier

Anti-noise wall

M1

M2

M3

LaS

all

e

10


Assessment of Project Noise in 2050 --- without Anti-Noise Walls

I1

I2

I3

11


Assessment of Project Noise in 2050 --- with Anti-Noise Walls

I1

I2

I3

Anti-noise wall

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Visual and Urban Integration


New Champlain Bridge Corridor Project: Entrance Integrated into its Environment

14


Corridor Artwork Elements Inspired by the Main Bridge

15


Architectural Elements of the Anti-Noise Walls

TYPE A OPAQUE TYPE C

TRANSPARENT

Highway side Residential side

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Ru

sh

bro

ok

e

Gibbons

We

lling

ton

De la Poudrière

Butler

Location and Height of Anti-Noise Wall De la Poudrière and May Street Area

Railway

Type A opaque wall made of panels 500 mm

high

Barrier H: 1.14 m

Standard height in relation to the inside of the

runway

Vertical scale 1x1

Runway

17

Ja

cq

ue

s-L

au

zo

n


Details of the Visual Integration

TYPE A

May Street

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Detailed Elevations of the Anti-Noise Walls

1 2

2 3

2 3

1 2

LaSalle

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2 3

2 3

1 2

1 2

20

LaSalle



4 5

3 4

3 4

4 5

21



3 4

3 4

4 5

4 5

22



5 6

5 6

Wellington

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5 6

5 6

Wellington

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Site Integration of the Anti-Noise Wall Gibbons Street Area

Section A before and after

A B C

25


Site Integration of the Anti-Noise Wall De la Poudrière Area

Section B before and after

A B C

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Site Integration of the Anti-Noise Wall of May Street Area

Section C before and after

A B C

27


Elevation of the Anti-Noise Wall L’Île-des-Soeurs Area

Type C barrier and

transparent wall

28

Thank You

Details of anti noise walls - june 15 2016 - nouveau pont champlain

Engineering

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