HULHULE-MALE’ BRIDGE PROJECT

EIA for the proposed Hulhule-Male’ Bridge Project
• According to impact analysis during the construction period, construction at night with
strong noise has a higher impact, especially the sensitive buildings at the start section. So
the construction plan needs to be arranged reasonably during planning. The project
should avoid all construction work in Male’ during night time which involves high noise
pollution. These may exclude continuous pouring of concrete and repair work. If it
requires construction between 22:00 and 06:00 the next day, contractor should ask for the
opinions and approvals from the local municipal administrative authority. After acquiring
permission of night time construction, the requirements for noise mitigation shall be
strictly followed. In cased of bored pile construction at night-time, casting and
compacting of concrete as well as horns of all the vehicles in and out of the construction
site shall be forbidden.
• Strengthen the maintenance of construction equipment. Keep it lubricated and fasten all
parts to reduce vibration noises while operating. Construction mechanical equipment
should be placed firmly and steadily on the ground and if possible, vibration attenuation
base should be used.
• Reasonably arrange the driving routes and schedules for construction vehicles in and out
of the site and strengthen the management of those construction vehicles. No horns,
watch out the speed limit and drive courteously to reduce the traffic noises. Construction
vehicles should try to avoid the driving in residential areas. For those that have to pass
through the residential areas, a reasonable driving plan shall be made and negotiation and
communication with neighboring residents shall be strengthened, to prevent the noise
disturbance to the residents.
6.5.2 Prediction and evaluation on traffic noise impact during operation period
The key source of noise pollution during the bridge operation comes from the vehicles that use
the bridge. Predicting and evaluating traffic noise impact on overall noise radiation level and the
sensitive points affected helps develop reasonable noise mitigation measures..
6.5.2.1 Prediction mode
The factors effecting noise magnitude mainly include the parameters of traffic volume (traffic
flow, speed, vehicle type, etc), the inherent parameters of relevant road (road type, height, slope,
etc.), the distribution of buildings on both sides of the route and topography factors, etc.
The prediction for this project is based on German Cadna/A environment noise prediction
software, which is suitable for predicting impact of traffic noise complicated urban environments
and road condition. The sketch of the prediction mode is shown in Figure 6.10.
Prepared by: CDE Consulting & China Shipping Environment Technology
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