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马迹山矿石中转港装船码头后引桥嵌岩钻孔灌注桩,位于引桥根部的1号~4号墩,墩间距分别为24.4m、23.0m和30.0m,与抛石围堤相接壤。每个墩台设置3根桩,中心间距5.8m,共计12根桩。钻孔灌注桩采用乃1600mm、壁厚16mm的钢套管,材质为A3钢。设计要求钢套管打穿强风化岩层,支撑在中微风化岩层顶。嵌岩要求:嵌人中微风化层 相似文献
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嵌岩桩广义上的定义是指下部有相当一段长度浇筑于岩层中桩基.本文结合某5万总吨液化烃泊位工程,针对强风化岩层厚、岩层上部覆盖层薄的地质特点,从桩基承载力计算、桩基选型、桩基布置和沉桩钻孔过程中注意点等方面对嵌岩桩设计进行了总结,本地质条件下嵌岩桩嵌岩深度大,一般满足弹性长桩要求,但承载力水平不高,桩基排架布置可按斜桩或大直径全直桩布置,嵌岩桩沉桩和成孔应注意桩变形、卷边、强风化岩遇水软化和缩孔等问题。 相似文献
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洋山三期工程接岸结构在东部部分岩面较高、覆盖土层较薄区域仍采用斜顶桩板桩承台结构,斜顶桩采用φ1.9 m钢套筒嵌岩桩,钢套筒以下的嵌岩部分直径φ1.5 m,斜度6∶1。由于岩面起伏变化很大,部分桩位的斜桩钻孔在进入中风化岩前需穿透较厚的强风化层,有塌孔的危险,技术风险较大。经设计、施工多方努力,已顺利完成施工和检测,为大直径斜桩嵌岩的应用积累了宝贵的经验。 相似文献
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改建工程采用平衡仓间压力挖石清障安放钢护筒,之后回填固定护筒,经过试验论证采用十字冲击锤在护筒内冲砸沉箱底板,穿越成孔。调配泥浆输渣、清孔,使穿越沉箱底板成孔嵌岩桩施工获得成功。这种穿越沉箱底板成孔嵌岩桩施工新技术具有较重要的现实意义。 相似文献
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在淤泥层较厚持力层为岩石地基的地质条件下,常采用冲、钻孔灌注桩嵌岩,但在施工过程中塌方塌孔严重、安全性差,如何突破预制桩本身具有无法穿过孤石和滚石的特性,实现嵌岩是工程中需要研究的问题。结合实际工程设计与施工,根据工程地质和荷载情况,通过采用不同的桩体及桩靴形式,成功实现预制桩在岩石地基中嵌岩的目标。 相似文献
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本文通过扬长江公路大桥南汊悬索桥南索塔嵌岩钻孔灌注桩护筒的施工实例,对大直径钢护筒振动锤单点振动下沉、型钢导向框导向工艺进行了论述。 相似文献
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《船舶与海洋工程学报》2014,(2)
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. 相似文献
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《船舶与海洋工程学报》2014,(4)
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; 相似文献
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《船舶与海洋工程学报》2014,(1):126-126
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. 相似文献
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联合作战计划和执行系统 总被引:2,自引:1,他引:1
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。 相似文献
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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. 相似文献
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《船舶与海洋工程学报》2014,(1)
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. 相似文献
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《船舶与海洋工程学报》2014,(2)
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. 相似文献
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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). 相似文献
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
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Gunnar Alexandersson Staffan Hultén Frode Longva 《Research in Transportation Economics》2010,29(1):212-218
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. 相似文献