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31.
隧洞及井接头防水作为一项关键工序,对输送饮用水的青草沙过江管隧洞工程尤为重要。文章以此为工程背景,结合深覆土输水隧洞的特点,详细阐述了隧洞自身的防水质量控制及特殊形式外包井接头设计和施工技术,可为今后类似工程提供参考借鉴。 相似文献
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Gases in deepwater oil/gas spills can lose considerable amounts of the gas phase due to dissolution in water. Gas dissolution has a significant impact on the behavior of the oil/gas jet/plume because of its impact on the buoyancy. A method is presented in this paper for computing gas dissolution that covers a broad range of water depth, from shallow water where gases behave as ideal ones under low pressure to deepwater where gases behave as non-ideal ones under high pressures. The method presented also accounts for the spherical and non-spherical shapes of gas bubbles. The gas dissolution computations are validated by comparing the computed results with observed data from previously conducted laboratory experiments. The gas dissolution computation module is then integrated with a model for underwater oil/gas jets/plumes by Yapa and Zheng [J. Hydraul. Res. 35 (5) (1997) 673]. Scenario simulations are presented to show the impacts of gas dissolution on the behavior of jets/plumes. These scenarios show the impact of dissolution on the behavior of the jet/plume. The comparison of results using ideal gas conditions and non-ideal gas conditions is also shown. 相似文献
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Feng Q.Cao J. 《现代隧道技术》2018,(3):193-199
For the bed rock of the foundation pit of the Bandar Malaysia North Station (BMNS) in Kuala Lumpur,the karst, fissure and cave are very developed, and curtain grouting, spud grouting and compaction grouting were conducted to achieve waterproofing and reinforcement. A Lugeon test and pumping test were carried out to test the grouting performance. The results show that the waterproofing effect of the Bandar Malaysia North Station (BMNS) is significant, meeting the basic requirements for waterproofing. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved. 相似文献
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FPSO/FSO: State of the art 总被引:2,自引:0,他引:2
Yoshihide Shimamura 《Journal of Marine Science and Technology》2002,7(2):59-70
Floating productions systems have been utilized in remote offshore areas without a pipeline infrastructure for many years.
However, they have become even more important with the push by the offshore industry into ever deeper waters. Floating production,
storage, and offloading/floating storage and offloading (FPSO/FSO) systems have now become one of most commercially viable
concepts for remote or deep-water oilfield developments. In this article, the advantages of FPSO systems are explained, and
their present status of maturity and utilization around the world is reviewed. Recent trends in mooring systems, hull construction,
safety, and operational issues are summarized from a technical viewpoint. Finally, the technical challenges and future prospects
of two significant growth areas, i.e., gas-field development and deep-water development, are discussed.
Received: June 24, 2002 / Accepted: July 17, 2002
Address correspondence to: Y. Shimamura (shimamura@modec.co.jp) 相似文献
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在江河下游及海上修建桥梁,需要采用深孔大桩径钻孔灌注桩基础,往往出渣困难,影响钻机效率和钻进速度。本文介绍了田庄台大桥大径超深钻孔灌注桩施工工艺,尤其是出渣、排渣方法,较好的解决了这一难题。 相似文献
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以地铁车站基坑围护桩施工为背景,对钻成孔围护桩侵限原因进行了分析,并给出了预防及处理措施,对类似工程施工具有参考意义. 相似文献