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《水道港口》2022,(1):68-73
长江上游存在众多航道整治建筑物,综合评价其技术状况对航道建设规划重要理论价值与现实意义。基于模糊贝叶斯网络评价模型,对长江上游5座整治建筑物进行了验证评价,并通过数学期望公式量化建筑物具体技术状况值。结果表明:长江上游典型航道整治建筑物技术状况等级评价与相关维护管理部门对航道整治建筑物历年评价契合度较高,符合航道整治建筑物评价的客观规律,量化技术状况值满足工程实际状况,建议对整治建筑物技术状况量化值为50~70展开相应损毁部位的维修,70~80应加强观测、巡视。主槽浅区航深、航道整治建筑物坡比、坝身水毁体积比为航道整治建筑物技术状况评价的主要潜在影响因素,日常管理维护应重点关注冲刷坑发展态势、边坡稳定性、主槽浅区航道条件。 相似文献
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以虎山滩航道成功整治为例,论述了该浅滩河床演变特点、整治参数确定、整治原则及措施,卵石推移质动床模型设计及选沙,简要介绍了通过模型试验所获得的良好整治效果。 相似文献
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急弯浅卵石滩航道整治技术研究 总被引:1,自引:0,他引:1
以坝油滩航道成功整治为例,论述了该浅滩河床演变特点、整治参数确定、整治原则及措施,卵石推移质动床模型设计及选沙,简要介绍了通过模型试验所获得的良好整治效果。 相似文献
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河口区整治是航道整治工程的一个重点、难点问题,文章结合笔者的工作实践及工程实例,介绍了某出海航道整治工程河口区整治的思路、方法及整治效果,为以后类似航道整治工程的设计和优化提供参考。 相似文献
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窑监河段航道治理方案研究 总被引:1,自引:0,他引:1
对窑监水道的演变分析结果表明:在较长一个时期内,主流将稳定在乌龟夹,不存在将监利左汊作为主汊及主航道进行整治的条件,但如果继续拖延下去,对河势、航道、港口及地方经济均会造成不利影响.文章确定了将乌龟夹作为主汊及主航道进行整治的设想,同时提出了针对该水道的具体整治方案,包括总体整治方案和一期整治方案. 相似文献
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根据狗足湾滩河段的河型河势及碍航特点,通过模型试验提出了采取炸礁开槽、疏浚和筑坝相结合的整治方案,试验结果表明,经采取整治措施后,取得了良好的整治效果,该滩按试验推荐方案进行了整治,原型观测表明达到了预期的整治目的。 相似文献
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本文根据汉江王家咀至薛家垴河段航道整治施工顺序模型试验结果,提出了游荡性河段航道整治原则、措施及最佳整治工程,通过对整治工程多种方案的比较,提出了最佳分期施工方案,该方案不仅保证整治效果且能减少工程投资. 相似文献
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价值观是指人们对价值的性质标准、构成和评价的基本看法和态度,是指导人的行为的一系列基本准则和信条。构建海事核心价值观是时代发展的要求,更是海事自身发展的需要。 相似文献
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This chapter presents a summary of the findings of the workshop on ‘Analytical and Institutional Methods and Frameworks’. The paper discusses the nature of the analytical methods used in the papers presented and the purposes for which they were employed, which were generally to either assist in the planning and operation of public transport or to monitor the efficiency and effectiveness of transport services. Subsequent sections examine issues related to data collection and management, and the more general issue of institutional arrangements. Policy and research agendas needed to support further consideration of the subject are then identified. 相似文献
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介绍青藏高原多年冻土的冻融特性,并结合我局在青藏铁路十二标段的具体施工,分析了冻土的冻融特性及具体防止措施. 相似文献
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Geoffrey Wood 《Maritime Policy and Management》2004,31(2):157-171
This paper explores the current state of coastal and inland shipping in Tanzania. It provides an overview of the state of ports and shipping in Tanzania, and the reasons underlying the present crisis of competitiveness in terms of both global pressures and national and regional dynamics. Problems of competitiveness are at least partially due to under-investment, management failures, skills shortfalls and difficulties in interfacing with the railway network. Less easy to resolve structural problems include the great imbalance between imports and exports, heightened regional competition and ongoing political instability in the Great Lakes region. 相似文献
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风量与风压的简易测量及应用 总被引:2,自引:0,他引:2
锅炉正常燃烧必须有充足的风量,当锅炉鼓风或引风不足将导致锅炉效果恶化,锅炉出力、热效应率明显下降。结合工程实例,介绍结托管简揭测试鼓、引风系统各部分风压、风量,帮助判断分析工程实际问题的简便方法。 相似文献
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Elizabeth A. Wilman 《Coastal management》2013,41(3):211-230
As the controversy over Outer Continental Shelf (OCS) oil and gas leasing continues, with environmentalists and fishermen seeking to block or delay leasing decisions that they think will adversely affect their interests, the need for better estimates of the environmental costs associated with OCS development becomes increasingly apparent. Although high degrees of precision in such estimates may never be economic, let alone feasible, better knowledge would reduce the uncertainty surrounding the magnitude of such costs, and would make it easier to come to grips with the problem and reduce, if not resolve, the controversy. 相似文献