Acoustic Barriers: Reducing Demolition Noise Pollution

Demolition sites are a source of noise and dust that can be disruptive to nearby residents. However, there are many effective ways to manage these nuisances so that both residents and workers can enjoy a comfortable working environment.

Local exhaust ventilation (LEV) systems can reduce noise from demolition and masonry work by filtering dust and other contaminants that are breathed in.

Noise pha do cong trinh gia re uy tin ha noi Control in Demolition

Demolition work is noisy and disruptive, but there are several ways to minimize noise to mitigate the impact on nearby residents. For example, working during the daytime and limiting use of loud equipment to specified times can help avoid nuisance.

Similarly, announcing the demolition schedule to local residents can let them know in advance when to expect disturbances. Additionally, choosing a contractor with a good compliance history can help reduce the likelihood of complaints. Lastly, using quieter equipment can significantly decrease the amount of noise produced during demolition. For example, Obayashi’s Bubble Silencer covers the chisel of giant breakers (heavy equipment that crushes concrete) with bubbles to cover noise and reduce dust. This device can reduce the level of noise by 5 dBA and contains 90% of the dust that is generated during demolition.

Dust Suppression in Demolition

Dust suppression is an important aspect of demolition because dust particles can contain hazardous material such as asbestos, crystalline silica, and aluminium. Exposure to these materials can be dangerous for workers and nearby residents.

To control dust, a typical demolition site is thoroughly sprayed with water before work begins to dampen down any loose material and prevent it from becoming airborne. This method is effective, but it takes a lot of manpower to constantly move around the site and reposition hoses.

Other solutions, such as using a misting cannon to capture the dust, are more efficient and safer for the crew. A device like the Bubble Silencer can cover a breaker and reduce noise by 5 dBA with bubbles, helping to protect the health of demolition workers.

Acoustic Barriers for Demolition

Noise barriers block or absorb sound waves and help mitigate demolition noise pollution. They are especially effective if they’re located close to the source of noise or a noise-sensitive area.

Other ways to reduce noise include using equipment with noise-reducing attachments and scheduling work during times when people aren’t around. Also, it’s important to monitor noise levels regularly and make adjustments if necessary.

Using hydrodemolition equipment, for example, can significantly reduce noise and dust during concrete demolition. Its hammers don’t have to strike hard against the concrete as they do with traditional breakers, making them much quieter.

Dust Control Measures for Construction

Dust is an inevitable but challenging by-product of construction projects, especially during the drier months. It not only irritates workers but can also pose a serious health risk, leading to lung problems and even death if inhaled frequently. Dust can also be dangerous for wildlife and biodiversity if it becomes airborne and makes its way into watercourses.

To minimize construction dust, teams can employ a variety of control measures. These can be broadly categorized as engineering controls, administrative controls and personal protective equipment (PPE).

Engineering controls include using water sprays to suppress dust or installing local exhaust ventilation systems on machinery. Administrative controls can involve modifying work schedules and limiting the duration and frequency of high-dust activities. PPE is the final line of defence against dust and includes respiratory protection and eyewear.

Demolition Site Pollution Management

Although demolition activities generate large amounts of dust and noise, minimizing the impact on nearby residents can help ensure compliance with local environmental regulations. Using a relocatable monitoring system with a dust and noise sensor, you can continuously measure air quality and make adjustments on the worksite to reduce pollution.

It is also important to work with a contractor who has demonstrated experience working on similar projects. This will help decrease the likelihood of complaints from your neighbors.

Existing research reveals that environmental pollutants on demolition sites are often not monitored, and thus cannot be measured in real time. The new IMS is designed to monitor air, sound and vibration pollutions in demolition sites in order to ensure that they meet the required regulations.