滑模摊铺特大桥桥面技术与工艺

根据对电白—湛江高速公路源水特大桥水泥混凝土桥面进行机械化连续摊铺的实践 ,论述了应用成套滑模摊铺设备连续摊铺特大桥桥面的施工组织与施工工艺 ,为水泥混凝土路面滑模摊铺技术的发展提供了经验     

高等级公路膨胀土地段路基施工技术

在分析膨胀土工程特性的基础上，提出了膨胀土路基施工技术要点和基本要求，同时介绍了石（家庄）安（安阳）高速公路邢台段膨胀土地基处理技术措施     

碾压混凝土配合比设计方法研究

分析了碾压混凝土强度的形成机理和碾压混凝土路面平整度及施工机械对配合设计的要求，提出了一种以提高碾压混凝土路面平整度为目标的配合比设计新方法。     

Digging Deep: Managing Social and Policy Dimensions of Geoduck Aquaculture Conflict in Puget Sound,Washington

Shellfish aquaculture can result in conflicts among stakeholders who perceive impacts and tradeoffs regarding sense of place, aesthetic, recreational, economic, and ecological values. Pacific geoduck clams (Panopea generosa Gould 1850) are grown in intertidal plots using gear- and labor-intensive techniques that result in a high value export product. A confluence of issues has resulted in on-going social and legal tensions surrounding geoduck aquaculture in southern Puget Sound, Washington (WA), USA. Using interviews and document analysis, we explored stakeholder perspectives and policy issues related to geoduck aquaculture in southern Puget Sound. Twenty-three stakeholders were interviewed, including state agency employees, representatives of the aquaculture industry, nongovernmental organizations, landowners, a tribal member, and an academic. Nine state hearings board decisions on challenges to aquaculture permits were also analyzed. Stakeholders articulated a variety of perspectives regarding aesthetic, recreational, land-use, ecological, political, regulatory, and economic aspects of geoduck aquaculture activities. Hearings board cases addressed similar issues (aesthetic, ecological, and recreational), as well as challenges to restrictions on aquaculture. Potential strategies for managing this conflict include emphasizing best management practices, identifying and incorporating best available science, joint fact-finding approaches, and initiating and improving communication among all stakeholders.     

Control of drivers' route choice: Pipe dream or panacea?

In most large cities traffic flow is controlled or manipulated in a number of ways. The methods used are mostly negative in the sense that they restrict the driver's choice of alternative routes rather than encourage him to use a particular one. This paper reviews some of the conventional measures and goes on to consider whether a more positive approach to route control might be justified, by inducing a more efficient or acceptable pattern of traffic movement in urban areas. The principal criteria for an efficient pattern are taken to be the total rate of expenditure of vehicle mileage and the frequency of route crossings, and an attempt is made to evaluate the potential benefits of route control in these terms. Social, technical and political considerations suggest that compulsory control will not be feasible for some time (at least, in the UK), but if the benefits to drivers as individuals can be shown to be worthwhile an advisory system might be practicable. Some possible systems are briefly outlined.The author is grateful to the City Engineer of Westminster City Council, Mr A.J. Cryer, for permission to publish this paper,which, however, does not necessarily represent the views . City Council. The author is greatly indebted to E. M. Holroyd for numerous suggestions and advice.     

中、下承式拱桥短吊杆结构行为分析

分析中，下承式拱桥短吊杆受力行为以及破坏机理，并提出改进短吊杆设计的意见。     

Shorter sea routes as a result of increasing cargo flows

This paper examines the apparent paradox involved in shipping lines responding to increasing cargo flows from Britain to mainland Europe by moving to shorter routes. Analysis shows, however, this move to be a logical and valuable defensive response by shipping lines but at a cost to the transport consumer.