大麦屿货运码头改造加固工程的论证复核

通过对玉环大麦屿货运码头加固和改造设计,提升码头靠泊等级。对码头泊位长度、码头前沿水深、泊位作业标准和平面水域等进行全面论证,对码头水工建筑物的设计荷载、结构内力进行复核计算。     

舾装码头的岸线管理

造船业的舾装码头和普通货运码头在前沿水深和船舶荷载上有显著差异，但目前在管理上混为一谈。建议有关部门明确舾装码头岸线使用标准和泊位吨级，这对造船工业发展有十分重要的现实意义。[编者按]     

风浪联合作用下电厂码头驳船系泊试验研究

文章通过几何比尺1:50的物理模型试验,对14 000 DWT驳船在风、波浪荷载不同组合工况下船舶系泊运动量、缆绳拉力、护舷承受的撞击力,以及船舶靠泊产生的撞击力和撞击能量等进行了研究。分析表明,艏艉缆与码头前沿夹角变大时可分担部分横缆受力,从而使各个缆绳的受力更为均匀;在艏、艉与码头前沿夹角为59°～60°时,港内波浪周期在12 s时,限制波浪工况为H_(4%)≤0. 6 m,满足安全的靠泊速度需小于等于0. 2 m/s。     

天津港北疆港区19~#～20~#泊位码头加固改造工程分析

天津港第四港埠有限公司所属的北疆港区19~#~20~#泊位通过码头结构加固改造,码头结构等级由1万t级提升至7万t级,其改造方案为拆除原有结构前方桩台及基桩,在码头前沿线向海测突出7 m后原位新建前方桩台,码头前沿水深由-11.0 m浚深至-15.0 m。     

船舶靠泊法向速度的控制

随着港口、航运事业的蓬勃发展,进出港口货物迅速增加,船舶进出港频率也相应增加,造成码头前沿船舶碰撞事故时有发生,同时码头由于年久失修,也会使码头荷载和强度降低,这就要求引航员最大限度降低船舶靠泊速度来保障安全。     

重力式方块卸荷板大型构件出运码头升级改造

以工程实例介绍了重力式方块卸荷板码头的改造设计方案。由于原有码头卸荷板悬臂较大,在码头前沿均布荷载增大的情况下,使得基床顶面产生较大的后倾应力,基床承载力不满足规范要求。改造方案通过在后方设灌注桩及现浇钢筋混凝土板,减少码头卸荷板悬臂部分上部荷载,防止基床顶面产生较大的后倾应力,为类似的码头改造设计提供了借鉴。     

泰州靖江港区某高桩码头工程设计

通过对泰州靖江港区某码头自然条件、设计船型资料、工艺要求及荷载特点的分析,从总平面设计和水工结构设计等方面阐述码头设计内容,提出高桩梁板式结构作为码头结构方案。结合长江下游码头设计中船型众多、水位差较大、码头前沿面层开孔较多、桩基形式多样且沉桩需考虑水深因素等特点,详细介绍了高桩码头的结构设计重点和要点。并对高桩码头及引桥桩型选择和桩基布置、结构计算进行了分析论述。     

大水位变幅水库回水变动区码头通航水流条件研究

针对大水位变幅影响下的水库变动回水区码头前沿通航水流条件问题,以在建的白鹤滩水电站坝址下游白石滩翻坝码头为例,通过二维水动力数值模拟研究方法,对大水位变幅水位进行分级,开展白石滩翻坝码头通航水流条件的影响研究,得出码头最高通航流量与分级水位呈线性的关系：码头前沿水位越高通航水流条件越好,当码头河段水位≥585 m时,在各级流量下码头前沿通航水域水流条件均满足船舶安全停靠和通航的要求,说明码头按照建成后在较高水位期间运行的设计方案是可行的。     

马钢港务原料总厂码头结构加固改造工程设计

在分析马钢港务原料总厂原码头结构体系的基础上,结合水位、水流、地质等自然条件,对设计船型、泊位长度、码头宽度、系靠泊点布置及码头前沿水深等总平面布置进行剖析,选择通过在排架跨中增设系靠船墩以独立承受船舶荷载的方案设计水工建筑物。该码头改造方案利用原有码头资源,既保证码头平稳生产,又节省工程投资。     

码头荷载对全直桩码头分段长度的影响

对上部结构为装配整体式高桩梁板结构,规范规定结构的分段长度宜取为60~70 m,而在实际工程中,已有采用分段长度超过规范要求的案例,且运行状态良好,因此在实际工程中研究码头的合理分段长度具有重要的意义。本文采用单因素和多因素结合的方法,以均匀地质条件下全直桩码头为例,分析水平荷载、温度荷载及荷载组合情况下结构的位移和内力情况,得出影响码头分段长度的荷载控制因素为水平荷载和温度荷载,且随着结构跨度的变化,两者的主导地位发生变化。合理的码头分段长度应结合码头荷载工况,根据内力和变形来综合选取。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。