海上超长大直径嵌岩钻孔灌注桩施工技术

介绍槟城二桥主桥钻孔灌注桩施工技术。马来西亚槟城第二跨海大桥主桥是一座双塔斜拉桥。该桥索塔基础采用21根φ230 cm/φ200 cm变直径钻孔灌注桩,其最大设计桩长为126.9 m,桩端嵌入微风化基岩深度达8 m,最大成孔深度达133.15 m。基于对槟城二桥主桥海上钻孔灌注桩的施工技术管理实践,总结超长钻孔灌注桩的设备选型、成孔、成桩、桩基承载力试验等施工工艺,为同类桩基的施工提供经验。     

后注浆灌注桩在外海岩基码头工程中的应用

针对在外海无掩护孤立墩施工环境条件下岩基上采用灌注斜桩存在泥浆护壁的泥皮和孔底残余沉渣降低桩基承载力、孔壁浸泡软化降低桩周土层土体强度、混凝土芯柱过长质量难以保证、硬质岩层钻孔成孔难度大、成孔工期长等技术难点,进行减小桩基入岩深度和提高桩基承载力的研究。采用灌注桩施工后进行桩底后注浆技术,对桩底沉渣和岩基裂隙进行注浆密实,并对后注浆桩基进行检测。结果表明,后注浆能提高桩基承载力,有效减小桩基入岩芯柱长度,从而保证混凝土芯柱质量,缩短施工工期。     

钻孔灌注桩施工技术和质量控制

钻孔灌注桩目前在高层建筑和桥梁下部的使用中已相当普及,但桩基成孔、成桩质量很难控制。笔者结合多年钻孔桩工程施工的经验,就桩基施工注意事项、施工工艺、成孔质量控制及桩基事故处理等问题进行探讨,期望通过与同行们相互交流,达到提高施工水平的目的。     

桥梁工程中深水桩基钢管桩钻孔平台的设计与施工

随着我国科学技术的发展,工程建设技术也得到了很大程度的提高,特别是桥梁建设技术,而在大跨度桥梁建设工程中深水基础钻孔桩施工是极为关健的施工技术。本文以广西桂平郁江二桥钻孔平台的设计工程为例,分析探讨桥梁工程中深水桩基钢管桩钻孔平台的设计与施工。     

钻孔灌注桩在富水砂性土层中的应用

钻孔灌注桩是一种常用的地基加固方法,如何有效控制灌注桩成孔后的稳定性,对于保证灌注桩整体成桩质量至关重要。以沿海地区某项目为例,针对长螺旋钻孔灌注桩在富水砂性土层施工中遇到的成孔效率低、孔底涌土等问题,提出了采用钻孔成孔后同步进行孔底注水的施工方法,并进行试桩验证。结果表明:孔底注水能有效地解决成孔后孔底涌土的问题。使用长螺旋钻孔灌注桩孔底注水技术既能降低工程造价,又能保证施工质量、发挥长螺旋钻机施工效率高的特点,具有良好的实用性。     

浅谈桥梁钻孔灌注桩施工中的质量控制

结合桥梁工程中钻孔桩施工的实际工作实践,详细探讨了桥梁工程中钻孔桩施工工艺,对桥梁钻孔灌注桩施工中的钻孔、桩基清孔及桩基混凝土灌注的施工过程等方面的质量控制措施进行了分析探讨,为今后类似工程提供参考依据。     

澳门友谊大桥站孔注桩气举反循环清渣施工工艺探索及应用

主要介绍澳门友谊大桥钻孔灌注桩气举反循环清渣的施工工艺，施工经验和体会。澳门友谊大桥主桥桩基共有钻孔灌注桩３３２根，桩长２６．２－７２．３ｍ，桩径１．２５ｍ，选用ＧＪＤ１５００型钻机（配套的真空泵为６ＳＰＳ型射流泵），用反不清渣钻孔。当孔深达６０ｍ钻孔孔桩施工出现故障，泵吸清渣工作无法进行，对其中１７９根桩长在５０－７２．３ｍ的深桩，首次探索了气举反循环清渣的施工方法，获得成功。     

高桩码头灌注桩施工工艺技术研究

高桩码头作为比较常用的码头结构型式,被广泛应用于各个码头项目中,桩基部分是高桩码头的重要组成部分,灌注桩施工工艺是高桩码头桩基的常用作法,本文结合工程实例,对高桩码头灌注桩施工工艺技术进行了研究,分析了沉桩施工、钻孔施工等各个工序的技术要点,可为类似工程项目建设提供借鉴。     

φ15m超大直径空心桩在复杂岩溶地层中的应用

以江西省吉安市井冈山经济技术开发区深圳大桥井吉铁路跨线桥为依托,根据桥梁上跨井吉铁路和桥位处岩溶地层发育的特点,提出综合采用弹性波CT法探测溶洞发育、超大直径空心桩替代钻孔灌注桩及桩底注浆加固等技术措施,解决了复杂岩溶地层桥梁桩基础设计、施工中的诸多难题。介绍目前国内最大直径桥梁桩基础——φ15 m超大直径空心桩在复杂岩溶地层中的应用。     

外海百米深孔2m直径钻孔灌注桩施工技术总结与探讨

本文介绍浙江省温州市洞头大桥(距温州33涅)主桥2m直径钻孔灌注桩施工技术。通过对水上钻孔平台及超长钢护筒的设计与安装的实践,对钻孔中超长时间泥浆护壁技术实践,对钻孔进尺参数的控制实践,对恶劣水文气象条件下的长钢筋笼的安装实践,对百米深孔清孔实践及对大型水上混凝土搅拌站的设计应用等进行总结,探讨外海水中桩基工程的施工技术。     

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;     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 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;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

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。     

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.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

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）.     

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.