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عنوان فارسی مقاله:

استفاده از فلکسی-دیوار در تجدید موانع سر و صدا


عنوان انگلیسی مقاله:

Application of flexi-wall in noise barriers renewal


سال انتشار : 2015



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مقدمه انگلیسی مقاله:

1. Introduction

Noise barriers or sound walls are usually constructed along the roadways to mitigate the airborne noise emanating from vehicles. Most of the provinces across Canada have established a “noise barrier retrofit program”, which mainly involves the extension and renewal of the existing sound walls in urban environments, to mitigate noise pollution and minimize its impacts on public health. According to the published policy of ministries of transportation of several provinces (e.g., Ontario, Alberta and British Columbia), accelerated and cost-efficient construction techniques, which do not alter the structural system and foundation of the existing walls, are desired. The program also focuses on the sound walls built in the last few decades which are not high enough and are required to be vertically extended by 1–2 m to influentially absorb and reflect the vehicles noise. An innovative sound wall system was developed in the University of Western Ontario, and was examined to serve as a vertical extension to the existing sound walls. The wall system (denoted as flexi-wall) consists of stay-in-place poly-blocks as formwork, light polyurethane foam (LPF) reinforced with steel rebars as structural cores and polyurea as a coating of the wall surfaces (Fig. 1). Poly-blocks are interlocking light-weight blocks which are stacked up layer by layer and act as formwork for the LPF cores. The poly-block is 20 20 80 cm3 and includes four cylindrical voids with 14 cm diameter. It is made of molded low-density polyurethane and weighs approximately 1 kg. The poly-blocks are fire-resistant blocks and have an excellent capability to absorb, mitigate and reflect a wide range of noises with unmatched frequency of reflective noise.



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کلمات کلیدی:

Research paper (PDF): Application of flexi-wall in noise barriers renewal https://www.researchgate.net/.../282496273_Application_of_flexi-wall_in_noise_barrier... This wall system (flexi-wall) is intended to be employed as a vertical extension to existing noise barriers (sound walls) in an accelerated construction method. [PDF]Guidelines on Design of Noise Barriers - Environmental Protection ... www.epd.gov.hk/epd/english/environmentinhk/noise/guide_ref/.../barrier_leaflet.pdf A proper design of noise barriers would need due considerations from both ...... c) Periodic maintenance of planting - weeding, replacement of failed plants and, ... OECD Environmental Performance Reviews OECD Environmental ... https://books.google.com/books?isbn=9264055584 OECD - 2009 Recommendations • further specify noise regulations (e.g. obligatory ... landing) and investments (e.g. low-noise pavements, noise barriers, renewal of rail fleet ... Nassau Expressway Construction, New York City: Environmental Impact ... https://books.google.com/books?id=bag1AQAAMAAJ 1981 Indooroutdoor measurements revealed a noise reduction of 7 dB with ... Predicted noise levels at the proposed lnwood Urban Renewal Housing Project for the ... High noise barriers for roads and railways - Hering Bau https://www.heringinternational.com/en/products-services/noise.../high-noise-barriers/ For the areas around roads, railway tracks and engineering structures, Hering employees manufacture and install standard noise barriers as well as those along ... Greening the Economy: Nordic Experiences and Challenges https://books.google.com/books?isbn=9289322292 John Magne Skjelvik, ‎Nordic Council of Ministers, ‎Annegrete Bruvoll - 2011 - ‎Carbon dioxide Regulations (e.g. speed limit in city centres, noise emission and emission ... and landing) and investments (e.g. lownoise pavements, noise barriers, renewal of ... Low noise barriers - Hering Bau https://www.heringinternational.com/en/products-services/noise.../low-noise-barriers/ Small and effective: positioned directly adjacent to the track, Hering's low noise barriers ensure an effective reduction in the level of noise produced by rail traffic.