丹江口大坝高水头帷幕补强灌浆现场试验成果分析

丹江口大坝混凝土坝原坝基防渗灌浆处理需在水库蓄水的高水头条件下进行补强施工,通过在右2号坝段基础廊道底板上的共计8个帷幕灌浆孔进行试验,通过现场采用的两种材料进行的帷幕补强灌浆试验资料分析及两种材料灌后检查孔检查成果比对后确定灌浆用材,同时校验设计钻灌参数;确定了适合、有效的施工方法、施工次序和工艺流程;通过试验段单位注入量分析,提出最优灌浆压力、浆液水灰比,最优帷幕补强灌浆各项施工参数。试验表明,该试验段按设计布孔和灌浆技术参数是合理的、可行的,可作为指导丹江口大坝加高工程高水头帷幕补强灌浆的施工依据。     

超长隧洞灌浆水泥浆液输送技术研究

在地质条件复杂的西南山区修建超长隧洞,灌浆是加固围岩的重要措施之一,而在超长隧洞中水泥浆液的供应成为灌浆施工的难题。基于流体力学基本理论与现场试验研究了水泥浆液通过管道输送时的压力损失,研究发现：在管道直径为27mm、输浆流量为80L/min的工况下输送水灰比为0.5：1（减）的水泥浆,压力损失约为0.6MPa/100m。并简要介绍了锦屏二级电站引水隧洞灌浆施工中的浆液供应方式,即洞内建设制浆站制备0.5：1的纯水泥浆液,然后通过高压管道输送至各个灌浆施工面的方法,可为类似工程施工提供参考。     

浅谈青河县拜兴水库帷幕灌浆施工质量控制

本文以青河县拜兴水库除险加固帷幕灌浆施工为例,从帷幕灌浆施工的程序、参数、工艺、浆液要求等方面,阐述了拜兴水库坝基帷幕灌浆施工的质量控制。     

水灰比过大和过小对混凝土性能的影响

水灰比是混凝土配合比的一个重要参数,本文论述了水灰比过大和过小对混凝土强度、和易性、耐久性、裂缝、收缩的影响,说明了施工中要考虑多方面因素,计算最优水灰比并严格控制混凝土的水灰比,使混凝土的性能达到最佳水平,节省资源保证施工质量。     

高压旋喷桩在石渣层施工中漏浆问题的解决

针对高压旋喷桩在石渣层中施工时发生漏浆而导致喷浆过程中不返浆的问题,比较采取填砂、降压、调浓水泥浆液以及充填灌浆等措施的效果。结果表明:高压旋喷施工过程中若出现不返浆的情况,采用充填灌浆进行堵漏效果显著,在漏浆不严重的情况下,通过简单的调控措施(填砂、调整施工参数等)亦可保证高压旋喷施工的正常进行。     

汉班托塔港一期工程南围堰墙下帷幕灌浆施工

斯里兰卡汉班托塔港一期工程南围堰地质条件复杂,岩石主要以片麻岩为主,岩体强度低且裂隙非常发育,施工中利用灵活的钻灌施工工艺、合理的施工参数、高效的成孔机具、先进的灌浆监控设备及良好的浆液指标等在施工质量和施工进度上获得了双赢。本文主要介绍施工中主要的施工方法和具有创新性的技术特点。     

水利工程坝基固结灌浆施工技术质量控制研究

在现代水利工程中,坝基固结灌浆是一项常见的施工技术,通过向岩层中压灌水泥浆液,可以有效填充岩层孔隙裂缝,起到提高岩体弹性模量、增强坝基岩体抗压强度的作用,对水利大坝运行效果的改善有着重要意义。因此,为充分发挥技术优势,本文对水利工程中坝基固结灌浆施工技术的工艺流程进行探讨,并提出坝基固结灌浆施工质量控制措施,为从业人员提供技术指导。     

水库坝基防渗施工中高喷灌浆技术及应用

高喷灌浆作为一项成熟的防渗加固技术,控制浆液在高压作用下喷射破坏原有土体结构,土体颗粒与浆液经混合搅拌后以特定排列结构凝结为固结体,起到防渗加固效果,在水库坝基工程中展露出广阔应用前景。基于此,为充分发挥技术优势,加大技术推广力度,本文对水库坝基防渗施工中的高喷灌浆技术工艺流程与操作要点进行探讨,并提出高喷灌浆技术的应用策略,为同类工程提供参考。     

河堤土坝防渗治理中劈裂灌浆技术的应用

在概述W河堤土坝防渗概况及加固处理必要性的基础上引入劈裂灌浆防渗加固治理技术,并对包括劈裂孔设置、造孔、浆液制备、灌浆施工等在内的该河堤土坝劈裂灌浆施工技术要点进行分析探讨。结果表明,劈裂灌浆防渗加固技术应用范围广泛,其能在不释放原病害土坝坝体应力的情况下构造起竖直且连续的防渗帷幕"泥墙",达到恢复并提高原病害土坝坝体防渗能力的加固施工效果。     

海底隧道突涌水灾害注浆防护效果模拟试验

本文为研究注浆对海底隧道突水灾害的防护效果,开展了海底隧道突水注浆防护模拟试验。使用3组配比的水泥-水玻璃浆液对海底隧道不良地质进行注浆,对比分析注浆后隧道在开挖过程中涌水量、围岩应力和孔隙水压力变化。研究发现:预注浆能有效防护海底隧道突水;浆液配比对防护效果具有重要影响,浆液扩散效果和注浆体强度是主要影响因素;对海底隧道不良地质进行注浆加固,一定程度上能提高周边围岩的稳定性。     

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

正~~     

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.