HULHULE-MALE’ BRIDGE PROJECT

EIA for the proposed Hulhule-Male’ Bridge Project
6.5.2.5 Prediction on Distribution of typical vertical section sound field
A typical section is selected for vertical sound field prediction, which is used to explain vertical
distribution of noise and distribution conditions of front and rear noise impacted by the project.
Road network of the project consist of bridge and ground connections. Considering the worst
impact, we selected the sensitive nearest building in Malé to conduct prediction and analysis. At
the same time we selected operation long term to conduct prediction. The prediction results are
presented in Figure 6.12 and Figure 6.13.
Figure 6.12 Distribution of vertical sound field in K0+015 section at daytime
Height
Height
-10 0 10 20 30 40 50 60 70 80 90 100 110 120
Distance with middle line of the road
-10 0 10 20 30 40 50 60 70 80 90 100 110 120
Distance with middle line of the road
Figure 6.13 Distribution of vertical sound field in K0+015 section in nighttime
According to the noise measurements carried out in the area, main line of the bridge and ground
connection has a combined impact on the sensitive buildings. Noise value of buildings to the
side of main line at front row of temporary main line is about 55dB(A) at daytime, and about
49dB(A) that at night time. It can be seen from the above figure that the traffic noise radiation
values experienced by 6 to 8-floor building are highest. The noise values of two storey building
that is 63 m away from main line is the same with that of the 6 to 8 storey building that is 5 m
away from main line. According to the prediction results, noise values of day and night all meet
class B standard of UK PPG 24.
Prepared by: CDE Consulting & China Shipping Environment Technology
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