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生态工程在信九高速公路中的应用 总被引:2,自引:0,他引:2
高速公路大规模施工中对周围的生态环境不可避免地带来了较大的干扰和破坏,导致了生态环境恶化,生态系统失衡,简单绿化工程已不能满足环境保护的要求.京珠高速公路信九段在大规模施工过程中,充分利用现代科技技术,保护现有的资源和环境,恢复被破坏的生态环境,其生态工程的综合应用为生态工程的技术发展积累了一定的经验. 相似文献
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本文主要研究了高速公路施工对生态环境产生的影响,主要从施工对环境的影响因素,及施工中对环境保护的防护措施两方面进行论述,希望通过研究分析改善高速公路施工生态环境,仅供参考。 相似文献
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高速公路建设是以破坏生态环境为代价的一项现代化工程,其开挖路堑、填筑路堤,都会导致原生植被破坏、水土侵蚀、大量岩质边坡和裸露山体出现等生态环境问题,本文通过室内不同工艺、配方、草种、抗冲刷及生态恢复效果比较,提出了适合福建地区公路边坡生态恢复施工工艺、基质配方、草种并对生态恢复机理进行了研究. 相似文献
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通过对高速公路边坡水土保持的研究,主要论述边坡水土保持植物防护设计的应用,从高速公路水路流失的特点出发,指出边坡为公路水土流失重灾区。进行植物防护设计不仅能够达到防护效果,还有利于恢复植被,改善生态环境,有效地防止水土流失,并介绍了高速公路边坡水土流失植物防护技术设计原则。最后通过实践分析,对植物防护做出具体设计,为今后同类工程的水土保持措施布局提供参考和借鉴。 相似文献
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《西部交通科技》2006,(6)
中国·路域生态工程有限公司,专门从事挖方边坡的生态防护与景观建设的设计和施工,属于北京市高新技术企业,拥有先进的施工技术和装备。公司引进了日本成套的取代浆砌片石等刚性防护手段的边坡生态防护与景观建设技术,应用厚层基质喷附技术、棉网状植生带技术和连续纤维加固喷附技术等,对不同地区的公路、铁路、矿山、水利及城建边坡开展生态防护与景观建设。公司自1999年成立以来,先后完成多项大型边坡生态防护与景观建设工程。例如:①山西太原绕城高速公路边坡生态防护与景观建设工程、②内蒙古呼集高速公路边坡生态防护与景观建设工程、③内蒙古老集高速公路边坡生态防护与景观建设工程、④陕西省西禹高速公路合阳段边坡生态防护与景观建设工程、⑤北京市平程路边坡生态防护与景观建设工程等。所有工程均取得了集边坡防护、景观美化和环境保护为一体的可持续效果,获得了社会各界和所有业主的一致好评。 相似文献
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Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD). An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip. It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links. 相似文献
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Joseph N. Prashker 《Transportation》1979,8(4):329-346
Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area. 相似文献
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本文阐述了混合动力列车的技术特点及其相应优势与劣势,同时介绍了其在国内外的研究动向,并对其应用前景进行了展望。尽管该类新型铁道车辆的续航能力、电池寿命以及成本等相关问题目前仍有待改善,但以其对城市环境的美化作用与优越的舒适驾乘性能,以及高效节能、绿色环保的显著优势,依然不失为一类充满前景的新型轨道交通运输方式。 相似文献
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天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本. 相似文献
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This paper estimates the efficiencies and productivity changes of 12 international airports in the Asia-Pacific region based on data from 1998 to 2006. We apply stochastic frontier analysis (SFA) to compute efficiency estimates and use the Malmquist productivity index (MPI) to analyze productivity changes. We use the SFA model with a translog-type production function after testing the statistical hypotheses. According to the results of the SFA hypothesis tests, airports have experienced a technological regression; the deviations from the efficiency frontier are caused more by technical inefficiency than random noise. However, the inefficiency was found to decrease. The MPI reveals a declining trend resulting more from technological change than from efficiency change, with a decrease in inefficiency. Taken together, both the hypothesis tests and the MPI not only provide consistent conclusions, but also suggest that airports should concentrate on technological progress. 相似文献
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明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。 相似文献