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一种双排长短密排桩基础的框架海堤结构 总被引:1,自引:0,他引:1
针对目前滨海地区深厚淤泥质地基中沿海大桥与一般土石海堤交叉影响问题,通过桩型比选(钻孔灌注桩、大直径薄壁筒桩以及U形预应力板桩)、桩基布置方案比选(密排、2倍桩径间隔以及满堂布置)等深入对比分析,结合竖向承载力、水平承载力计算对比,提出了一种新型双排长短密排桩基础的框架肋板结构海堤结构;并对深厚淤泥地基进行浅层满堂固化加固处理。该新型结构能有效避免一般土石堤沉降对沿海大桥桥墩负摩擦阻力的不利影响,能有效保证大桥安全,同时能大量节省交叉段桥梁和交叉段海堤的施工工期。通过完工后的实际沉降等监测数据分析,认为该新型结构有效地保证了交叉段桥梁的安全。 相似文献
563.
Governments around the world are adopting inclusive growth agendas. The ambition to align economic growth ambitions with broader-based social benefits is increasingly embraced by corporations to limit the ‘negative externalities’ and enhance the ‘positive externalities’ of their operations. Therefore, micro-level corporate strategies and macro-level national ambitions meet at the meso-level of networks and clusters. This requires societal spheres to collaborate and search for alternative governance constellations. In this discourse, port development is only recently receiving attention. In March 2018, ports around the world signed the World Ports Sustainability Program declaration, which aims to contribute to the sustainable development goals (SDGs), whilst a number of national port (master) plans have started to include social along with environmental standards. Extant studies on partnering and stakeholder inclusion in port development are proliferating but are primarily aimed at environmental rather than social (inclusion) issues. This paper adopts an exploratory research design to consider conditions for inclusive port development. A novel taxonomy considers port development as a driver for inclusive growth, where partnerships are the missing link between micro-level business strategies and macro-level effects in the port region and economy at large. This paper shows the first findings and delineates areas for further research. 相似文献
564.
ABSTRACTThe study of social networks in activity-travel research has recently gained momentum because social activities and social influence were relatively poorly explained in activity-based models of travel demand. Over the last decade, many scholars have shown interest in identifying personal social networks that constitute an important source of explanation of activity-travel behaviour. This paper seeks to review two research streams: social networks and activity-travel behaviour, and social influence and travel decisions. We classify models, summarise empirical findings and discuss important issues that require further research. 相似文献
565.
Birgit Pauksztat 《Maritime Policy and Management》2017,44(5):623-640
Although fatigue is considered an important problem in shipping, little is known about potential mitigating factors or resources for coping. Adopting a Job Demands–Resources framework, this article examines the effects of both job demands (stressors) and resources on fatigue, focusing on social interactions on board as a potential source of social support. Using an incomplete repeated-measures design, the study combined information from documents with surveys on seven cargo ships. Findings indicated that fatigue levels were highest for those working on deck and for individuals at higher hierarchical levels. Higher numbers of port calls (and to some extent lower numbers of days at sea) also increased fatigue levels. By contrast, night watches and the number of days in port had no effect on fatigue. Supportive social interactions reduced fatigue (main effect), but their effect was weaker when the number of port calls increased (interaction effect). All main effects were mediated by individuals’ perceptions of work pressure. Taken together, findings highlight the importance of considering social interactions on board to advance our understanding of stressors and strain in seafaring. 相似文献
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文章从班组管理存在不足入手,剖析了其产生的原因,并以切身的体会,提出了一系列改良班组管理的方法与措施,为船舶行业加强班组管理提供了可借鉴的经验。 相似文献
570.
介绍了环氧涂层和硅烷浸渍两种工艺在连云港高桩码头海工混凝土防腐蚀中的应用情况。实践表明环氧涂层和硅烷浸渍皆能显著提高海工混凝土的防腐性能。 相似文献