船舶遮蔽航区变更为沿海航区的检验要点

船舶如何从遮蔽航区升级改造为沿海航区是近期的热点话题。文章结合辖区内一艘自卸运砂船的航区变更检验工作,阐述自卸运砂船从遮蔽变更为沿海航区应重点考虑的问题以及检验要点,对船舶的航区变更检验工作有所帮助。     

关于海上自卸运砂船结构若干问题的研究

海上自卸运砂船作为一种新船型发展很快,《海上自卸运砂船检验暂行规定》出台以来,国内一直在研发满足这一规定的海上自卸运砂船。本文通过对海上自卸运砂船结构方面几个关键问题进行研究分析,为设计研发、建造和检验海上自卸运砂船提供参考。     

内河简易自航自卸船的设计探讨

本文以一艘载砂量约220t的内河简易自航自卸式运砂船为例，对在设计过程中涉及的结构、总体布置、自卸系统、轮机等较特殊的问题进行了初步的探讨。     

内河新建自卸砂船检验补充要求

第1节 一般规定 1．1目的 1．1．1为加强内河自卸砂船（以下简称船舶）的安全管理，完善船舶检验的技术要求，保障船舶及人命、财产的安全，特制定《内河新建自卸砂船检验补充要求》（以下简称“本要求”）。     

筑牢“三条线”打响攻坚战——福建海事局“海安会战”小纪

<正>近年来,由于长江等内河河砂禁采、部分沿海省份海砂禁采政策的陆续实施,供求矛盾进一步加剧,以致河砂、海砂价格暴涨。加之福建省海砂资源丰富且质量较好,大量采运砂船涌入福建沿海及台湾海峡非法盗采海砂,严重破坏了海洋生态环境,影响了正常的通航秩序和通航环境。由于大部分采运砂船存在船舶不适航、船员     

浅析漏斗式泵砂船在吹填砂施工中的应用

通过与传统的吹砂船舶对比,结合项目实际施工情况,提出选用自吸自航自卸皮带船进行采运、卸、砂作业,漏斗式泵砂船作为水上吹砂施工平台,有效解决了采砂区距离远、储砂坑选用、吹砂作业区环保等问题,同时缩短了吹距,降低了成本,为类似工程提供参考。     

内河自卸砂船稳性状况分析

超载和货物堆放状态是影响自卸砂稳性的主要因素,本文通过对内河自卸砂船完整稳性的分析和比较,提出了改善自卸砂船稳性的措施。     

内河自卸砂船稳定性常见问题及解决对策

近年来,内河自卸砂船以其卸装货物灵活快速等优势受到了广泛的关注,然而其稳定性问题也是日益突出。不甚合理的V字型舱底以及传统输送带装置的安全隐患极大的限制了目前自卸砂船的应用。通过分析和计算,将V型舱底改为W型舱底能有效提高自卸砂船的稳定性,不仅如此,还降低了工程成本较好的解决了砂船稳性裕度欠缺等问题。此外,对传统的自卸砂船输送带进行合理的改造,采用伸缩式输送带也是提高内河自卸砂船稳定性的有效措施,它能降低砂船行驶过程中的安全隐患,今后有望被广泛应用。     

砂船改集装箱船的体会

本文通过对自航自卸砂船改装成集装箱船的工程，阐述了集装箱船的特点，根据其特点改造自卸砂船的船体结构，稳性及空船重量重心等工作体会。     

基于稳性衡准系统(V4.2)的内河自卸砂船安全装载分析

本文在稳性衡准系统(V4.2)中对一艘珠江水系典型内河自卸砂船建模,分析货物装载不当对稳性的影响,提出自卸砂船装载注意事项。     

长顺直河段边滩冲淤对新洲—九江河段航道的影响及治理

针对新洲—九江河段顺直段边滩频繁冲淤对航道的影响和治理问题,通过实测资料分析,探讨边滩冲淤与河段浅区航道条件之间的关系。结果表明河段浅滩航道条件与顺直段边滩冲淤有直接关系:边滩完整、位置偏上时,航道条件较好;反之,则较差。基于此提出增强滩体控制力度、限制沿岸槽发展、适当增加浅区冲刷的河段6 m航道治理思路和治理措施。     

Remote Sensing for Coastal Area Management in China

Satellite remote sensing technique has been used to observe the coastal area. This article reviews applications of remote sensing to coastal area management (CAM) in China. These applications include the coastal resource and island mapping, coastal environmental change and coastal hazard monitoring, oceanographic parameter measurement, and coastal process restudy. Future applications are also discussed.     

The study on maritime transport along the southern coast of Thailand on the Gulf of Thailand: a summary

This paper examines the potential of developing coastal ports and channels along the Southern coast on the Gulf of Thailand. There were 18 channels included in the study area, ranging from Ban Don Channel to Pattani Channel. The study approach was based on the analysis of the data on cargo movement to and from the study area by coastal shipping and truck, in terms of quantity and types of cargo. The study found that there are three potential areas to be developed for coastal shipping in Thailand (along the southern part on the Gulf of Thailand), namely Songkhla (Songkhla channel), Surat Thani (Ban Don and/or Ta Thong) and Nakhon Sri Thammarat (Sichon and/or Pak Phanang). This paper, however, suggests that further study on the technical part for support of the precise channels to be developed is needed.     

The study on maritime transport along the southern coast of Thailand on the Gulf of Thailand: a summary

This paper examines the potential of developing coastal ports and channels along the Southern coast on the Gulf of Thailand. There were 18 channels included in the study area, ranging from Ban Don Channel to Pattani Channel. The study approach was based on the analysis of the data on cargo movement to and from the study area by coastal shipping and truck, in terms of quantity and types of cargo. The study found that there are three potential areas to be developed for coastal shipping in Thailand (along the southern part on the Gulf of Thailand), namely Songkhla (Songkhla channel), Surat Thani (Ban Don and/or Ta Thong) and Nakhon Sri Thammarat (Sichon and/or Pak Phanang). This paper, however, suggests that further study on the technical part for support of the precise channels to be developed is needed.     

湛江东海岛近岸潮流场数值模拟

将Smagorinsky亚网格模型引入ADCIRC潮流模型求解涡粘性系数,使模型在模拟近岸潮流方面更加合理。为进一步揭示中海油气开发利用公司广东沥青项目码头工程海域的潮流变化,利用改进的ADCIRC模型对湛江东海岛海域潮流场进行了合理地模拟和分析。结果表明该工程港池和进港支航道的开挖对湛江主航道影响很小。工程建设只改变了工程区海域的局部流态,并且新开挖航道的水动力条件有助于船舶顺流进港。     

海南岛西南海域泥沙特征及地形演变

基于水文泥沙测验及遥感影像资料分析海南岛西南海域泥沙特征,采用不同沿岸输沙公式对比计算海域的波浪沿岸输沙量,采用多年实测地形数据研究岸滩的演变规律。结果表明:海域内含沙量大潮大于小潮,但总体上悬沙含量较低;研究海域内径流对输沙影响较为有限,但受沿岸波流输沙的影响相对较大;而海区的悬移质颗粒比较均匀,颗粒较细;沿岸段波浪沿岸输沙能力净输沙方向均为自南向北,年净输沙能力在6.72万~13.31万m~3;岸滩演变的主要动力是波浪、波生沿岸流和潮流共同作用导致东方市所辖岸线的变化总体以自然冲淤变化为主,但冲淤强度有限,变化幅度不大。     

Assessing economic activity in coastal areas: A shift‐share approach

Abstract

An essential aspect of economic analysis associated with planning efforts is identifying the composition of existing economic activity and understanding historical trends in economic change. The shift‐share model is a useful and inexpensive tool for this purpose. Shift‐share analysis evaluates changes in local economic activities relative to changes in a reference area (usually the state or nation). Economic change is separated into a reference area component, an industry mix component, and a local share component. These measure, respectively, the effect on the local economy due to changes in the reference area, factors specific to the local mix of industries, and the changing competitive position of the local area relative to the reference area.

A shift‐share analysis of Florida's coastal counties reveals that all grew much faster over the 1965–1975 period than did the national economy. This rapid growth is primarily a result of a net shift of economic activity toward the study area relative to the nation. However, a few coastal counties did exhibit a mix of slow‐growing industries. Specific industry results for Florida counties at the eighty‐industry level reveal that many industries showed significant shifts toward Florida's coastal counties. The performance of individual industries in the coastal counties generally exceeded that of the same industries in noncoastal counties.     

FPSO改装项目永久检验通道的设置研究

文章以FPSO改装项目为研究对象,详细分析规范规则对于永久检验通道的设置要求,分析FPSO改装项目设置永久检验通道的必要性和可行性;认为仅有舱室修改的货舱和压载舱需设置永久检验通道,并给出永久检验通道的设计方法和布置方案,最终确定一种合理且经济的设计、布置方案。     

杭州湾大桥现浇墩身施工监理实践

杭州湾大桥北航道桥及南航道桥高墩区高度大于15m的68个墩身采用现浇工艺,截面型式分为3类。墩身最大高度42．5m,施工有效天数少,施工精度高,安全风险大。监理工程师对现浇墩身测量放样、模板制作安装、钢筋制作安装、混凝土浇筑和养护、拆模和验收等进行全过程的质量监控,并按照承包人自检频率的25％进行抽检。