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隧道建设(中英文) ›› 2014, Vol. 34 ›› Issue (9): 807-814.DOI: 10.3973/j.issn.1672-741X.2014.09.001

• 专家论坛 •    下一篇

港珠澳大桥岛隧工程深厚软基与大回淤条件下的工程处治研究

孙钧1,2   

  1. (1. 同济大学隧道与地下工程研究所, 上海 200092; 2. 上海市城建集团院士工作研究室, 上海 200122)
  • 收稿日期:2014-06-23 出版日期:2014-09-20 发布日期:2014-09-22
  • 作者简介:孙钧(1926—),男,江苏苏州人,1949年解放前夕毕业于上海国立交通大学土木工程系结构工程专业,国内外隧道与地下工程知名学者、专家,同济大学荣誉、终身、一级教授,中国科学院(技术科学部)资深院士,前国际岩石力学学会副主席暨中国国家小组主席,中国岩石力学与工程学会名誉理事长(前理事长),中国土木工程学会顾问、名誉理事(前副理事长),中国土木工程学会、中国公路学会、上海市土木工程学会等学会隧道与地下工程分会前副理事长、理事长。港珠澳大桥技术专家组专家。

Countermeasures for Deep and Thick Soft Foundation under Serious Backsilting Condition: Case Study on Artificial Island and Immersed Tunnel of Hong KongZhuhaiMacao Bridge Project

SUN Jun1,2   

  1. (1.Institute of Tunnel and Underground Engineering, Tongji University, Shanghai 200092, China; 2. Academician Working Office, Shanghai Urban Construction Group, Shanghai 200122, China)
  • Received:2014-06-23 Online:2014-09-20 Published:2014-09-22

摘要:

港珠澳大桥岛隧工程大面积深厚软基的加固处理,以及大回淤水道条件下管段柔性小接头处的预应力束筋将永久留置而不再在管节沉放落床、纵向沉降基本稳定后完全切断,形成半刚性管节。上述两者,是该工程项目施工中呈现的特色和亮点。此外,当日后长期运营中如管段小接头接缝仍出现有不测的拉开险情时,其应急工程处治对策也是必须事先妥慎考虑的预案。就上述各点问题进行了较为细致深入的探讨和分析。

关键词: 港珠澳大桥, 人工筑岛, 沉管隧道, 软基处理与加固, 复合地基, 挤密砂桩, 大回淤水道, 半刚性管节, 预应力束筋

Abstract:

The construction of the artificial island and immersed tunnel of Hong KongZhuhaiMacao Bridge has the following two features: 1) The deep, thick and largearea soft foundation of the artificial island and the immersed tunnel needs to be consolidated; 2) Instead of being cut off after the tube elements have been immersed and the longitudinal settlement becomes almost stable, the prestressed reinfored ties at the flexible joints of the immersed tube are kept permanently under serious backsilting condition. Furthermore, emergency countermeasures should be established in case unexpected edge opening occurs at the joints of the tube segments of the immersed tunnel in its longterm service life. In the paper, detailed analysis and discussion are made on the abovementioned points. 

Key words: Hong KongZhuhaiMacao bridge, artificial island, immersed tunnel, soft foundation consolidation, composite foundation, compaction sand pile, waterway with serious backsilting, semirigid tube, prestressed reinfored ties

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