共查询到19条相似文献,搜索用时 125 毫秒
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为了保证我国高速铁路桥梁工程的建设质量,解决地面区域沉降问题,首先分析地面区域沉降问题的特点以及对高速铁路桥梁工程的影响,其次分析地面区域沉降问题对于高速铁路不同类型桥梁的影响,最后提出地面区域沉降对高速铁路桥梁工程的影响的对策及措施,希望能够为广大高速铁路桥梁工程建设者提供一些工作经验和工作思路。 相似文献
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为解决交通噪声污染问题,对交通噪声的公害特性和声学特性进行研究,分析交通噪声防治的关键点,提出应用声屏障解决交通噪声问题,并展望声屏障未来发展趋势。 相似文献
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本文分析了交通噪声产生的危害,强调交通噪声防治的重要性,结合现行高速公路交通噪声声环境功能区质量监测、衰减断面监测等监测方法,从路线选择、新技术运用、声传递控制等方面综述了可行且有效的交通噪声防治方法,并提出应基于降低噪声污染源源强角度出发,加强降噪路面及低噪声运输工具研发工作,从源头控制噪声污染,从根本上解决噪声污染问题的建议。 相似文献
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随着高速铁路建设进入高速发展期,各方舆论对其安全性的关注也逐渐增强,高速运行环境下承载结构的可靠性、系统稳定性,以及产生诸如振动、冲击、噪声、电磁辐射、生态平衡等问题已备受关注。本文通过分析现阶段我国高速铁路安全评价和运营中普遍存在的问题,提出了相应对策和建议,希望能对今后我国高速铁路建设及营运起到一定的指导作用。 相似文献
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公路建设的发展,促进了国民生产总值的增长和社会的进步,同时也加剧了公路交通噪声污染的程度,控制、治理公路交通噪声,改善公路沿线的声环境质量是至关重要的。对高速公路营运期的噪声污染治理措施和控制对策,进行了分析研究。 相似文献
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随着经济的快速发展,机动车保有量迅速增加,交通声环境问题也逐渐突出,为定量研究交通流与交通噪声的相互关系,本文以福州市为三环路例,采用实地调查的方式,获取该路段的大、中、小车型的车流量和车速以及交通噪声数据,基于国内外交通噪声的预测模型,对交通流数据与噪声进行综合分析处理,研究发现在小型车占主导的交通流中,中型车与大型车对交通噪声的影响较小,甚至出现负相关,为解决这一问题,采用等效车流量与等效车速的方法,将大、中车型的车流量与车速转化为小型车的车流量与车速,最终建立适用于快速路的交通噪声预测模型。 相似文献
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高速铁路加速了要素、资源的流动性,拓展了市场半径,区域经济更加一体化,对缩小区域差距构建了要素流通和配置机制;高速铁路增强了区域开放程度,为各区域快速增长创造条件,为拓展我国空间发展结构铺平道路;高速铁路拉动了旅游等现代服务业产群的发展,促进了消费,带动了滞后区域的人力资本水平跃迁。 相似文献
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城市隧道的噪音问题已成为建设者日益关注的问题,主要噪声源为车行及设备运行噪声,相应的对隧道路面、侧墙、顶部以及相关的设备,特别在隧道口部采取降噪措施,对隧道及周边地区的环境质量的提高将起到一定的作用。 相似文献
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城市道路园林绿化属于城市绿地系统的一部分,具有改善生态环境的作用,能够促进人们生活环境质量的提升,同时可以减弱噪声、调节道路气候,净化空气效果明显,并且可以将城市各类绿地串联在一起。然而,就当前城市道路开展园林绿化现状来讲,仍存在一定问题。基于此,提出城市中道路园林绿化存在的主要问题以及解决措施,以期为相关工程提供借鉴。 相似文献
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采用低噪音路面和新型高效声屏障综合降噪技术处置交通噪声,并进行现场测试,测试数据表明,采用OGFC-13低噪音路面结构,在噪声200~1250 Hz频段,路面的平均吸声系数在0.25~0.59,吸声性能较好,可有效降低车内交通噪声约3.0 dB;在对试验段综合降噪效果的测试后发现,采用本文采用的综合降噪技术处置后,项目试验路段在距离声屏障屏体30 m处降噪效果为9.9 dB,相较普通路段降噪效果提升约4.3 dB,且监测数据表明,随着距离的增加,采用综合降噪技术处置的路段降噪效果表现的更加高效。 相似文献
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D. H. Koo J. C. Kim W. H. Yoo T. W. Park 《Transportation Research Part D: Transport and Environment》2002,7(6)
Wheel/rail interaction is a major source of railway noise. A low-noise wheel structure is developed and its effect on noise reduction is investigated. This low-noise wheel employs a rubber material inserted into the steel rim or mounted on the wheel surface. The low-noise wheel has low stiffness and a high-damping ratio compared to a solid wheel. Measurement shows that it reduces rolling and squealing. It turns out that a subway line with the proposed wheel could reduce its interior noise level by 4–5 dB(A) and vehicle vibration level by 7–8 dB. While the proposed structure seems promising in noise reduction for railway vehicles, the endurance and cost effectiveness of the low-noise wheel are yet to be verified. 相似文献
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With the rapid expansion of the high-speed railway infrastructure in China, conflicts arise between the interests of local citizens living along the planned tracks and the national interests of governmental authorities and project developers. This paper addresses questions of why and how Chinese citizens mobilize for and participate in protests against high-speed railway projects and to what effect. To this end, a comprehensive study was conducted on the decision-making process, public opinions, and protest actions regarding the plans and site choices for the Beijing–Shenyang high-speed railway from 2008 to 2013, combining quantitative and qualitative methods. In general, local residents are supportive of high-speed railway project construction, but they contest the closed decision-making process and the poor design and siting choices for the track by governmental authorities and companies. After four years of resident protests through formal complaints, lobbying, protest demonstrations, organizing alternative opinion polls, and discussions with authorities, citizens were partially successful in changing the siting of the track, adding protective measures (e.g., tunnels and sound screens), and saving green belts. Two conclusions can be drawn from this case study. First, regardless of the growing legal requirements, public participation in major projects in China is far from a standard practice. Final citizen participation is often preceded by serious conflict. Second, with defined good governance boundaries, there is increasing room for public participation in environmental movements, which does influence final decisions. 相似文献
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Road traffic noise models are fundamental tools for designing and implementing appropriate prevention plans to minimize and control noise levels in urban areas. The objective of this study is to develop a traffic noise model to simulate the average equivalent sound pressure level at road intersections based on traffic flow and site characteristics, in the city of Cartagena de Indias (Cartagena), Colombia. Motorcycles are included as an additional vehicle category since they represent more than 30% of the total traffic flow and a distinctive source of noise that needs to be characterized. Noise measurements are collected using a sound level meter Type II. The data analysis leads to the development of noise maps and a general mathematical model for the city of Cartagena, Colombia, which correlates the sound levels as a function of vehicle flow within road intersections. The highest noise levels were 79.7 dB(A) for the road intersection María Auxiliadora during the week (business days) and 77.7 dB(A) for the road intersection India Catalina during weekends (non-business days). Although traffic and noise are naturally related, the intersections with higher vehicle flow did not have the highest noise levels. The roadway noise for these intersections in the city of Cartagena exceeds current limit standards. The roadway noise model is able to satisfactorily predict noise emissions for road intersections in the city of Cartagena, Colombia. 相似文献