台湾海峡隧道的环保问题及应对措施

在全球经济高速发展的当今,实现海峡两岸“三通”,是国内外各界积极探索的重要课题,其中海峡隧道的建设,是实现台湾海峡经济区战略发展的关键所在。由于海峡隧道建设工程浩大,交通运输繁忙,在建设和营运期,势必产生诸多环境问题,必须在建设前期予以充分论证,确保经济发展和环境保护双赢。     

海湾沉管隧道建设方案的环境条件及环境影响

海湾地区的环境条件对沉管隧道的建设方案可能存在着一定的制约作用,而建设方案也会在一定程度上对周边环境产生一些负面影响,因此确定建设方案时需考虑尽量减少对环境的破坏,并应充分利用有利的环境条件。文章结合海湾地区的特点,着重分析了海湾沉管隧道的建设条件和环境影响,提出了工程建设过程中应注意的问题,同时对建设方案的合理性和环境保护措施进行了探讨。     

二灰土新型施工工艺的探索与应用

对二灰土新型施工工艺进行了探索,通过对新型施工工艺的应用,极大的提高了工作效率,降低了工程造价,在提高工程质量的同时,有利于环境保护.     

浅谈声屏障设计与计算的技术关键

声屏障设计与计算技术关键包括:声屏障立柱截面抗弯验算、声屏障立柱与底板焊缝强度验算与声屏障立柱长度计算等六部分。通过杭州湾跨海大桥连接线声屏障设计与计算的实例,能为类似工程提供技术参考。     

绿色环保节能在新型VLCC大型320000 DWT原油轮上的应用

本文介绍了新型VLCC大型320000DWT级原油轮在满足有关规范、公约的要求时,绿色环保节能在船上的应用。     

绞车轴瓦应力对附加载荷的响应机理分析

自升式风电安装船是海洋风电安装工程中的重要装备,摩擦绞车升降装置与桩腿、船体构成了自升安装船独立的升降系统。在升降装置的作用下,绞车提供牵引力完成放桩、升船等动作。海上作业过程中环境载荷的不确定性会使作业过程绞车升降系统受附加工作载荷,从而导致工作绞车容易发生故障,给作业系统的安全、稳定运行带来巨大的隐患。本课题从海洋38#风电安装船的外部作用环境和实船绞车轴瓦的失效情况出发,基于支撑桩腿、船体与海洋环境间的相互作用机理,分别分析了绞车轴瓦应力对冲击和振动的响应关系,并采用柔性体有限元仿真和刚体动力学仿真分析的方法,分析了绞车作业过程中的附加工作载荷。同时根据分析结果绘制了响应关系坐标图,进一步研究了工作过程中绞车附加载荷与绞车滚筒支撑轴瓦失效的机理关系。     

聚焦汽车涂料的发展

随着汽车制造业突飞猛进的发展,对于车用涂装产业的发展要求也越来越高。文章介绍了当代汽车涂料的发展现状,以及汽车涂装业常用的环保节能涂料的性能和功用。指出水性涂料和粉末涂料必将成为汽车涂料的主流,随着色母涂料的推广,不含异氰酸硅的底涂层罩透明层的安全型聚氨酯高温烤漆等一批高科技涂料开创了汽车涂装涂料的美好前景。     

公路噪声预测达标距离超出评价范围现象的探讨

文章根据公路项目环保竣工验收的交通噪声监测结果,通过理论值与实测值的比较,分析了典型路段交通噪声预测达标距离超出评价范围现象产生的原因,并提出了相应的解决措施及建议,为公路建设项目环境影响评价工作提供参考。     

Constraints to green vehicle ownership: A focus group study

We consider constraints that prevent people with environmental concerns from buying “green” vehicles that are smaller, more fuel-efficient, and less polluting by using a series of focus group discussions. We find that the features of vehicles currently on the market, family and work responsibilities, residential choices, and routines and preferences all act as constraints. Serious misunderstandings about the environmental impacts of owning and using vehicles also were noted, making it difficult for many to accurately assess their alternatives. For some, environmental concerns are unlikely to influence future vehicle purchase decisions, even if constraints were removed altogether; other priorities have taken and will take precedence over the environmental impacts of their choices.     

Environmental benefits from improving transportation efficiency in wood procurement systems

Forest operations use fossil fuels, which should be considered when environmental impact in the wood procurement is of concern. Road freight transportation is the most common operation in timber transportation, and thus is an important source of greenhouse gas emissions. This study assesses the impact of the new larger and heavier vehicles (LHV) on environmental emissions using the synchronized calculation method. The maximum (theoretical) and operational effects of 76 t LHV with calculations made for three weight limits (60, 64 and 68 t) are compared in Finland. Based on Enterprise Resource Planning (ERP) data, environmental energy efficiency (measured in relation to the trip) increased 9.2%. The reduction in fuel consumption was 12.5%, though this is likely to under-estimate the long-term effects that will be achieved when forest operations are fully adjusted to the maximum weight limit. A comparison with the European countries and a preliminary sensitivity analysis of the system demonstrate that the technological development to improve the transporting efficiency is essential for realizing 76 t LHV utilization in Finland.