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针对枢纽工程施工过程中不同施工时段的临时施工道路拆建频繁、施工经济成本和时间成本高的问题,研究装配式道路施工技术。在犍为航电枢纽工程中应用该技术,降低了施工的经济成本和时间成本、为主体工程施工争取了时间。得出了应用装配式道路施工技术可有效降低临时施工道路施工成本的结论。 相似文献
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本文首先对水利工程建设中水闸施工管理的意义简要概述,然后从开挖施工、土方建筑、拆除工程、砌筑施工、钢筋混凝土施工、金属结构设备安装等方面阐述水利工程建设中水闸施工流程,从稳定问题、渗流问题、消能防冲问题等方面阐述水利工程建设中水闸施工难点,从施工准备、施工过程、导流施工等方面阐述水闸施工技术要点,最后从施工管理意识不足... 相似文献
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排水工程是土建施工中的一项重要施工项目,尤其是在码头工程的施工中,排水施工关系着码头施工工程的质量和安全。所以要对码头工程的排水施工技术进行深入的研究和分析,并且根据码头工程的实际情况,设计出科学合理的排水施工技术方案。码头施工不同于其他土建工程的施工,码头施工中要考虑的问题和施工因素较多,特别是对地基施工的处理上,如果处理不当会影响地基的承载能力,以至于在后续施工中问题会不断出现,因此要重视地基排水技术的设计,保证码头施工的顺利进行,保证码头施工工程的质量和安全。 相似文献
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施工围堰是船闸施工过程中重要的环节,是船闸工程安全施工的前提和保障。船闸改造施工围堰方案要根据施工现场的水文、地质、施工条件等因素综合考虑,并经技术经济比较确定。文中对运东船闸扩容工程现场施工围堰进行概述,介绍了施工围堰施工过程、工艺和措施,并明确施工的过程控制和事前、事中、事后的控制要点。 相似文献
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重力式沉箱码头干法施工在实际工程中应用较少,与水下安装预制结构的湿法施工相比,干法施工具有施工过程透明、施工精度高、施工进度快等优点。文章以国家重点工程项目烟台至大连铁路轮渡工程项目为例,提出干法施工的工程可行性与施工技术措施。 相似文献
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施工项目是施工企业对一个建筑产品的施工过程及成果,可能是一个建设项目的施工,亦可能是其中的一个单项工程或单位工程的施工,施工企业的目的是创优质、高效益。如何通过施工项目管理,开流节源,创优质高效工程,在目前竞争激烈的公路工程行业,越来越受到各施工企业的重视。 相似文献
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中交四航局开发的智能化振冲碎石桩施工船,是集对桩、储料、上料、供水、供气、打桩施工于一体的振冲施工船,代替了传统的水上振冲施工用到的履带吊+方驳配套的施工方案,大大提高了作业精度、施工效率与施工质量,目前在该施工领域内是非常先进的碎石桩施工船。但是针对东帝汶帝巴湾码头施工过程中,由于特殊的珊瑚沙地层,导致在施工过程中容易出现造孔困难、填料困难的现象。通过研发改进后的供水、供气系统使施工效率明显提高,施工质量进一步改善,为后期新的项目施工积累了宝贵经验。 相似文献
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Nathan J. Bennett 《Coastal management》2019,47(1):67-87
The world’s oceans and coasts are awash in a sea of politics. The marine environment is increasingly busy, changing, and a site of degradation, marginalization, injustice, contestation and conflict over declining resources and occupied spaces at local to global scales. Themes of political ecology, such as power and politics, narratives and knowledge, scale and history, environmental justice and equity, are thus salient issues to understand in ocean and coastal governance and management. This subject review examines research on these themes of political ecology in the ocean and coastal environment and reflects on how the insights gained might be applied to governance and management. Political ecology provides important insights into: the influence of power in ocean management and governance processes; the manner in which narratives, knowledge, and scale are used to legitimize and shape policies and management efforts; the effects of historical trajectories on present circumstances, options, and practices; and the nature of inequities and environmental injustices that can occur in the marine environment. Moreover, ocean and coastal researchers, practitioners, and decision makers ought to engage with the political processes and injustices occurring in the ocean. Moving from critical insights to constructive engagements will ensure that political ecology helps to plant seeds of hope in the Anthropocene ocean. 相似文献
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全面阐述"十五"以来荆江河段治理基本情况,总结了该河段航道治理主要特点、初步成效与基本经验,并为下阶段系统治理提出了"统一规划、分步实施,远近结合、动态管理,有攻有守、攻守兼备以及提高整治建筑物耐久性并建立大荆江治理协调机制"等思路、对策与建议。 相似文献
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At the time of writing (2010), the world is witnessing the aftermath of the most severe financial sector meltdown in modern economic history caused by the real estate bubble in the United States. Its consequences on the real economy, especially in Europe, are yet to be fathomed, and this of course includes the longer-term impacts on international ocean transportation, ports and the distribution of global production.The economic recession has left the international shipping and port sectors with substantial overcapacity. This has resulted in drastic cost cutting measures on the one hand, and voluntary, often consensual, and coordinated reduction of supply on the other. These measures, together with a noticeable recovery in demand, are gradually leading again to improvement in prices charged by carriers and other transport service providers.In view of the country’s expanse; size of population; and regional inequalities, India’s dry ports (inland cargo consolidation and distribution centres) are seen by the government as a pivot of export-led growth and economic development (Haralambides & Gujar, 2011). Moreover, public and private sectors alike see the coordinated development of dry ports as the only way forward in terms of easing pressures at congested coastal ports, thus improving supply chain efficiency. In spite of this, dry port development and operations are still dominated by the public sector, under prices, capacity, land acquisition policies and other conditions that make private sector participation risky and comparatively unattractive. In order to rationalize dry port capacity and prices, this paper argues in favour of greater devolution through competition-enhancing Public-Private Partnerships (PPPs). The paper puts forward recommendations for the necessary legal, regulatory and general economic policy interventions based on international best practice, while keeping Indian specificities in the right perspective. 相似文献
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针对升船机运行可靠性问题,以齿轮齿条爬升式升船机驱动系统为研究对象,根据可靠性理论,在统计驱动系统运行维护数据的基础上,综合分析停机故障次数和故障检修停航时间对运行可靠性的影响,计算得出驱动系统及其部件的运行可靠度,提出提高驱动系统运行可靠性的建议:应高度重视驱动齿轮托架机构、电气传动设备、传感检测装置等机电设备的维护检修和优化完善,充分考虑设备检修的便利性;基于停机故障次数和故障检修停航时间的运行可靠度计算分析方法,能准确反映升船机的运行可靠性。 相似文献
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中国修船业在国家改革开放的浪潮中,经历了三十多年的快速发展,如今已稳居世界修船大国的国际地位,而中国修船企业正在引领世界绿色修船科技的进步,也引起了国际修船业的高度关注.然而,在人类社会生态环境面临严峻挑战的当下,作为世界贸易和港口经济重要组成部分的修船产业,如何形成发展新格局,从生态层面推进绿色、低碳、数字"一体化"... 相似文献