Direct and indirect impact assessment in off-site construction-A case study in China
Direct and indirect impact assessment in off-site construction-A case study in China
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DOI：
10.1016/j.scs.2019.101520
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发表时间：
2019-07-01
影响因子：
11.7
通讯作者：
Zhang, Guomin
中科院分区：
文献类型：
--
作者：
Sandanayake, Malindu;Luo, Wenkai;Zhang, Guomin
由于施工时间和效率的提高，非现场施工是一种流行的施工技术。然而，一个典型的建筑会产生几种空气排放物质，可分为直接和间接排放。这些污染物质的影响可能会对建筑工地周围的环境造成严重的健康影响。该研究试图量化与非现场施工相关的直接和间接排放，并与传统的现场施工进行比较。在成都，中国的两个案例研究被用来调查的直接和间接的影响，场外施工相比，传统的施工。结果显示，场外施工的温室气体排放量减少了8. 40%。影响评估表明，预制有更多的减少全球变暖和氧化形成在全球范围内和富营养化，人类毒性和酸化在区域和当地的环境。进一步的分析表明，运输距离和预制水平对碳排放总量的减少有很强的关系。本研究提供的方法举例说明了进行明确的评估的重要性，以帮助在场外施工中减少环境影响的决策。研究结果表明，开发一个结构化的决策平台，以协助可持续发展的决策在未来的重要性。
Off-site construction is a popular construction technique due to improvements in construction time and efficiency. However, a typical construction will incur several air emission substances which can be categorised as direct and indirect emissions. The effect of these pollutant substances may have severe health impacts on the immediate surrounding environment of the construction site. The study attempts to quantify direct and indirect emissions associated with off-site construction and compare with traditional on-site construction. Two case studies in Chengdu, China is used to investigate the direct and indirect impacts of off-site construction as compared to conventional construction. The results indicate GHG emissions reduction of 8.40% for off-site construction. Impact assessment revealed pre-fabrication having more reduction on global warming and oxidation formation at global level and eutrophication, human toxicity and acidification at regional and local environment. Further analysis revealed a strong relationship between the transportation distance and the level of pre-fabrication on total carbon emission reduction. The methodology provided in the current study exemplified the importance of conducting a well-articulated assessment to help decision making on environmental impact reduction in off-site construction. The results conclude the importance of developing a structured decision making platform to assist the sustainable decision makings in future.