Noise arresters, or noise barriers are erected along expressway, speedway and highway roads that go through or are near residential areas to reduce the wind blowing and noise pollution caused by passing vehicles.
We supply noise barrier for expressway project package and Al or Zn/Al absorptive sound shielding panels for central express ways.
Noise barriers meeting Requirements for Expressway Project Package:
| Loction Number | Chain Edge of Barrier | Barrier Length (m) | Side | Predicted Noise Level Without Barrier (dBA) | Barrier Height (m) | Predicted Noise Level With Barrier (dBA) | Barrier Distance From Road curb (m) | Surrounding Oescription | ||
| Day Time | Night Time | Day Time | Night Time | |||||||
| 1 | 37+390 - 37+420 | 30 | Left | 58 | 59 | 3 | 58 | 58 | 1 | Three store level House |
| 2 | 37+490 - 37+510 | 20 | Left | 59 | 59 | 3 | 57 | 57 | 1 | Single Store Level House |
| 3 | 38+280-38+310 | 30 | Right | 60 | 59 | 3 | 58 | 57 | 1 | Single Store Level House |
| 4 | 38+350-38-380 | 30 | Right | 60 | 59 | 3 | 58 | 58 | 1 | Single Store Level House |
| 5 | 38+430-38+630 | 200 | Left | 64, 63, 62, 62,59, 60,62, 62 | 64, 63, 63, 62, 60, 60, 62, 62 | 3 | 59, 57, 56, 57, 57, 58, 58, 57 | 58, 57, 56, 57, 57, 57, 57, 57 | 1 | Row of Single Store & Two Store Level Houses |
| 6 | 39+340-39+370 | 30 | Left | 62 | 63 | 3 | 58 | 58 | 1 | Single Store Level House |
| 7 | 39+340-39+400 | 60 | Right | 62, 63 | 62, 63 | 3 | 58, 59 | 58, 58 | 1 | Two Single Store Level Houses |
| 8 | 39+590-39+640 | 50 | Left | 63, 59 | 63, 60 | 3 | 58, 57 | 58, 58 | 1 | Two Single Store Level Houses |
| 9 | 40+500-40+560 | 60 | Right | 62, 62, 61 | 61, 62, 61 | 3 | 58, 57, 58 | 58, 57, 58 | 1 | Row of Single Store Level Houses |
| 10 | 70+730-40+820 | 90 | Right | 62, 61, 61, 61, 62 | 61, 61, 61, 61, 62 | 3 | 58, 56, 55, 56, 58 | 58, 56, 55, 55, 57 | 1 | Row of Single Store Level Houses |
| 11 | 41+470-41+510 | 40 | Right | 62 | 61 | 3 | 58 | 58 | 1 | Single Store Level House |
| 12 | 43+050-43+070 | 20 | Right | 60 | 59 | 3 | 57 | 57 | 1 | Single Store Level House |
| 13 | 43+150-43+180 | 30 | Right | 60 | 60 | 3 | 59 | 58 | 1 | Single Store Level House |
Modelling Assumptions -
International Calcuiation Standard/Guideline for roads: RSL-90
Road surface meterial: Porous Asphalt 0/9
Building absorption coefficient: 0.3
Ground absorption coefficient: 0.4
Barrier absorption coefficient : 0.4
Day time limit for peak hour = 63 dBA
Night time
limit for peak hour = 59 dBA
Note
Height of parpet wall is 1.0m
Meterial of the parpet wall is smooth concrete
The barrier distance considered as 1.0 m from the road curb for cut & filling areas.
Install cantilever barriers on parapet wall or increase the parpet wall height up 30 3m. Angle of the cantilever should be 450
The reported chainages may be vary wlthin ±5m range, because it is difficult to mention the exact chalnages during the field visit at this stage. It is advlced to get the Instructions/advice from ITI at the time of installing the noise barriers in order to locate the barrier at specified locations.
Technical Reference - Guideline for Traffic Noise Assessment Criteria For Expressways
Proposed specification for Noise Barrier Central Express way
1. Basic information of the Barrier
|
Barrier Type |
Absorptive barrier |
Outer cover |
Material should be Al or Zn/Al |
|
Outer cover gauge |
0.6mm or above |
|
Front face |
Perforated 15% or above |
|
Inner material |
Any sound absorption material like mineral wool (Glass wool is not preferred) |
|
|
Surface density |
Should be in the range of 20kgm-2 to 30kgm-2 |
2. Barrier Properties
Sound transmission class (STC)* |
35 or above |
Noise Reduction Coefficient / (NRC)* |
0.35 or above |
* Need product certificate from an accredited laboratory for STC and NRC
3. Barrier Fixing
• Should be an interlocking panel and able to fix panel to panel vertically and horizontally
• Should be able to install on top of a parapet wall as well as filling areas.
• Should be easy to replace in the case of damage.
• Should be Weatherproof.
• Should be UV protected for long term usage.
4. Environmental Suitabilitv
• Suitable for tropical weather.
• Suitable for heavy rain and high speed wind.
5. Structural Information
• Take the recommendation of design engineer based on the above specification.
Metal Panel Expressway and Highway Noise Barrier / Arrester has the following features:
1) Light transmission: up to 88%
2) Impact resistance: 80 times that of glass, 15 times that of acrylic sheet
3) Temperature resistance range:-40-120.C
4) Light weight only1/12 of the weight of glass of the same thickness
5) Ultraviolet resistance: with UV protective layer
6) Flame resistance: rated class B1
7) Sound and heat proof
Common specifications:
1) Width: 1220mm-2100mm (our regular specification)
2) Length: 20m--50mm(our regular specification)
3)Available in4mm, 5mm, 6mm, 7.5mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm
4) Color: clear, lake blue, green, blue, opal, bronze, gray, red, bronze(brown), blue-green, light-green, black, clear-embossed, light-embossed, blue-embossed
5) Customized colors and dimensions available upon requests
6) Packing: Both sides covered with PE film
This kind of noise arresters are popularly used in the following fields:
1) Telephone booths
2) Road signs and advertisements
3) Billboards on lamp boxes
4) Lighting and partition walls for banks, hospitals and stations
5) Greenhouses for vegetables, zoos, aquatic products
6) Sound and heat insulation for expressways
7) Instrument and war industries- windscreens, army shields
