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排序方式: 共有343条查询结果,搜索用时 46 毫秒
81.
环评工作中引入政策环评的思考 总被引:1,自引:2,他引:1
从项目环评和环境规划两个层次,以实例阐述了环境影响评价制度在控制新污染、保护生态环境、实施可持续发展战略方面发挥的重要作用,提出政策环评对指导我国经济发展具有主要作用,应该早日纳入环评工作内容。 相似文献
82.
Richao Wang Zibing Yuan Junyu Zheng Cheng Li Zhijiong Huang Wenshi Li Yan Xie Yiran Wang Kaiyang Yu Lejun Duan 《环境科学学报(英文版)》2020,32(10):138-150
Speciated characterization of Volatile Organic Compounds (VOCs), including oxygenated VOCs (OVOCs), from construction machinery and river ships in China is currently lacking. In this regard, we conducted field measurement on speciated VOC (including OVOC) emissions from six construction machinery and five river ships in the Pearl River Delta (PRD) region to identify VOC emission characteristics. We noticed that OVOC emissions from construction machinery and ships accounted for more than 50% of the total VOC emissions, followed by alkenes, aromatics and alkanes. Formaldehyde and acetaldehyde were the most emission species, accounting for 61.8%-83.2% of OVOCs. For construction machinery, the fuel-based emission factors of roller, grader and pile driver were 3.12, 3.12 and 7.36 g/kg, respectively. With the rigorous restraint by the national emission standards, VOC emissions of construction machinery had decreased considerably, especially during stage Ⅲ. Ozone formation potential was also significantly reduced due to the significant decrease in emissions of OVOCs and alkenes with higher reactivity. For river ships, the fuel-based emission factors of cargo ships and speedboat were 1.46 and 0.44 g/kg, respectively. VOC emissions from construction machinery and river ships in Guangdong Province in 2017 were 8851.0 and 4361.0 ton, respectively. This study filled the knowledge gaps of reactive gas emissions from different kinds of non-road mobile sources over the PRD, and more importantly, highlighted the necessity in adding OVOC measurement to give a complete and accurate depiction of reactive gas emissions from non-road mobile sources. 相似文献
83.
N. González Pericot P. Villoria Sáez M. Del Río Merino O. Liébana Carrasco 《Waste management (New York, N.Y.)》2014,34(11):1932-1938
The construction sector is responsible for around 28% of the total waste volume generated in Europe, which exceeds the amount of household waste. This has led to an increase of different research studies focusing on construction waste quantification. However, within the research studies made, packaging waste has been analyzed to a limited extent. This article focuses on the packaging waste stream generated in the construction sector. To this purpose current on-site waste packaging management has been assessed by monitoring ten Mediterranean residential building works. The findings of the experimental data collection revealed that the incentive measures implemented by the construction company to improve on-site waste sorting failed to achieve the intended purpose, showing low segregation ratios. Subsequently, through an analytical study the generation patterns for packaging waste are established, leading to the identification of the prevailing kinds of packaging and the products responsible for their generation. Results indicate that plastic waste generation maintains a constant trend throughout the whole construction process, while cardboard becomes predominant towards the end of the construction works with switches and sockets from the electricity stage. Understanding the production patterns of packaging waste will be beneficial for adapting waste management strategies to the identified patterns for the specific nature of packaging waste within the context of construction worksites. 相似文献
84.
《环境科学学报(英文版)》2023,35(3):761-773
To study the emission characteristics of typical construction machinery in Chengdu, 12 construction machinery (excavators, bulldozers, loaders, and forklifts) under idling mode, moving mode, and working mode, were tested using a portable emission measurement system (PEMS). Under three operating modes, the typical construction machinery in the working mode was higher in the fuel-based average emission factors of PM2.5 and NOx, while the fuel-based average emission factors of HC and CO were higher in idling mode. Integrated the results of investigation on ownership and activity levels of construction machinery, an exhaust emission inventory of typical construction machinery of Chengdu in 2018 was established according to the recommendation method. The annual emission of PM2.5, NOx, HC, and CO were 1.67 × 106, 1.61 × 108, 3.83 × 106, and 1.26 × 107 kg, respectively, and the excavator contributed the maximum emissions, accounting for an average proportion of 43.95%. The emission of construction machinery in Chengdu exhibited a clear monthly trend, with the highest from April to October and the lowest from November to March. In addition, the exhaust emissions presented an obvious spot-like characteristics, and the high-value areas were mainly concentrated in the surrounding suburban counties such as Shuangliu Wenjiang etc. To reduce pollution from construction machinery and improve the quality of the atmospheric environment, more effective measures on housing construction and municipal construction should be taken in those districts in Chengdu. 相似文献
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86.
建设项目竣工环境保护验收监测报告是检验建设方落实环保“三同时”制度的技术手段,也是环保部门依法管理的技术支撑和依据,竣工验收监测报告除遵循行业技术规范要求外,建设内容变更、环保设施落实、污染物排放及总量、环境质量影响等成为不可或缺的重要内容,需要逐一阐述明确。 相似文献
87.
88.
建筑施工伤亡事故现状、原因及其对策 总被引:1,自引:1,他引:1
刘少华 《中国安全科学学报》1996,6(4):58-61,57
应用安全系统工程学原理及方法分析建筑行业伤亡事故增多的根本原因;综合阐述建筑安全的基本对策,以求标本兼治,使建筑施工伤亡严峻形势得到根本好转 相似文献
89.
城市地铁安全施工第三方监测的研究与实施 总被引:12,自引:3,他引:12
实施城市地铁施工第三方监测是保证施工安全和工程质量十分重要的举措 ,有效地避免了施工过程中可能发生的事故。笔者以深圳地铁一期工程为例 ,详细阐述该工程中实施第三方监测的内容、第三方监测分析管理信息系统的研究和开发 ,包括地铁施工过程中对线路及沿线两侧建筑物倾斜和沉降、道路及各种管线沉降、土体位移、水位变化、桥梁墩台位移、隧道收敛及拱顶下沉等进行及时的监测、分析和信息反馈 ,从地铁工程第三方监测分析管理信息系统的内容、主要功能、系统结构等方面论述该系统的设计及开发。第三方监测及其管理的信息化 ,对全国其他城市的地铁施工安全 ,具有借鉴作用。 相似文献
90.
城市地铁工程主要穿越城市商业区和居民聚居区 ,施工过程中的安全技术问题可能对地表环境产生严重影响 ,甚至诱发地面塌陷等灾害发生。笔者结合广州地铁二号线鹭江站的施工实践 ,研究了城市地铁工程的施工安全技术 ;探讨了地铁车站施工安全监测中的维护桩变形、土体变形、支撑结构的受力状况、地下水水位、地下管线沉降和位移监测的实施细则 ;突出了对折返线施工过程的监测 ;研究了施工安全保障技术方法体系 ;对施工现场安全技术、施工工艺安全技术进行了深入分析 ;明确了基坑开挖、洞室掘进、空中作业等不同类型的施工场地和人工挖孔、爆破、模筑混凝土、钢支撑安装、防水层施做等各种施工工艺的安全保障技术方法 ;建立了安全施工和安全管理措施方法体系。 相似文献