潮流泥沙数值模拟在潍坊港规划中的应用

将潮流泥沙数学模型应用于潍坊港总体规划方案比选研究。采用MIKE21软件建立潍坊港二维潮流泥沙数学模型,对总体规划的各项方案进行水流、地形冲淤、航道回淤等方面的数值计算,并进行方案间的比较分析。研究结果表明,各方案工程实施后流场无明显差别,周边地形冲淤变化不大且差别较小;航道回淤是该区域规划方案选择的关键因素,整体发展方案明显优于分离式方案;经多方面考虑离岸岛堤式方案尚不可行。     

The impact of muddy bottoms in ports

Ports are drivers of regional and of countries’ economic development. Most ports are built close to coastlines, where waters are shallower and tend to suffer from deposit sedimentation processes, which reduce depths in operational areas. In presence of shallow waters and sedimentation, ports must decide whether to dredge or not, where both decisions have significant impacts on ports’ annual incomes. Nevertheless, there are seabeds, namely muddy bottoms, in which vessels can navigate with a safety degree. This paper aims at investigating the extent to which the theoretical knowledge of vessel’s control in muddy waters is valid at a certain nautical bottom, as defined by the Permanent International Association of Navigation Congresses (since 2009 the World Association for Waterborne Transport Infrastructure but the acronym stays PIANC) and its impact on port economics. To achieve the proposed objective, an email survey was sent to worldwide pilots that manoeuvre ships in muddy waters. The survey validated the theoretical knowledge, showed that navigation in muddy waters is possible, that it can contribute to reduce ports’ operational costs, and that the subject can be rather controversial.     

倾角仪在桥梁挠度测量中的应用

文章介绍利用倾角仪进行桥梁挠度测量的新方法,分析了其测量的基本原理,并通过工程实例应用,验证了倾角仪能大大提高测量效率,避免传统测量方法的不足,具有广阔的工程应用前景。     

长洲三线船闸人字门原型调试研究

为保证长洲三线船闸的正常安全运行,同时更好地积累大型船闸人字门运行经验,对长洲三线船闸人字门启闭特性进行原型观测与调试。结果表明：平水调试阶段,人字门系统运行平稳,启门力远小于启闭机额定容量,说明启闭设备设计合理;运行调试初期,闸室存在较严重的超灌（泄）现象,人字门活塞杆受压较大,可能超过启闭机的额定油压,易使液压杆受损;采用集控自动程序运行后,超灌（泄）现象得到较大改善,人字门活塞杆受力在正常允许范围内。证明原型观测与调试是保证实际工程安全运行的有效手段。     

A Training Framework for Understanding Conflict in the Coastal Zone

The coastal zone is attractive for human settlement because it tends to be resource rich, providing a good location to generate incomes and livelihoods. Equally, however, it is a complex and powerful natural environment, which means that the coastal zone often becomes a focus of conflict with multiple users competing for limited space and resources. Understanding the causes of, and determining solutions to, the ensuing problems requires inputs from a range of analyses across sectors and disciplines. However, different disciplinary and sectoral approaches frequently use different investigative methods, language, and means of presenting results. This article presents a framework that has been developed in collaboration with Indian institutions over the past three years in an effort to address some of these fundamental problems of analysis and translation into policy action. Key components addressed by the framework are strengthening the capacity to practice, knowing how to proceed and how to find out what needs to be known using experience-based problem solving.     

高速公路软土路基施工沉降及稳定性监测

介绍了软土路基施工中存在的主要问题和路堤施工软土路基观测的目的和内容,总结了路基沉降的观测方法及具体步骤,并结合高速公路工程实例,说明了软土路基沉降的观测方法在实际工程中的应用。     

高明大桥扩建工程施工监控

广东佛山高明大桥扩建工程是长1036m的预应力混凝土连续刚构——连续梁桥。文章介绍了该桥在悬臂浇筑施工过程中监控的目标、方法、数据分析、调控措施和监控效果。     

对SBS改性沥青剪切发育过程的试验分析

用不同类型的SBS与不同组分的基质沥青配伍,对改性过程中的取样用荧光显微镜进行微观观测和动态力学扫描及常规试验,发现微观观测和动态力学扫描均是判断聚合物是否稳定分散与发育的有效手段,而动态力学扫描具有更高的灵敏度,可以根据扫描结果独立判断剪切发育程度,而微观观测需与常规试验相结合方可得到较好结论。     

强夯置换在高速公路盐渍化软弱土地基处治中的应用

国道314线和硕-库尔勒段高速公路作为交通部西部建设课题的依托工程,在K432 463.20分离式立体交叉被交线K0 125～K0 300段首次应用强夯置换处治盐渍化软弱土地基,取到良好的效果。文章从强夯置换的原理、施工参数、检测、路基施工与预压过程中地基变形等方面,介绍了该方法在国道314线和硕～库尔勒段高速公路中的应用情况。     

钱塘江南岸西江塘海塘现场渗透试验观测成果分析

该文根据钱塘江南岸西江塘海塘现场渗透试验观测资料成果,结合标准塘建设及地质勘察资料,对试验堤段现有抗渗透能力进行了评估分析。分析发现围堰长时间维持高水位后,海塘的出渗会引起堤身发生渗漏和土体软化,增大了透水性,使渗流量剧增,海塘填筑的闭气土体防渗性能差异较大。文章还将测压管水位实测值与有限元计算值进行对比,对理论计算采用的渗透系数予以校验。