›› 2012, Vol. 33 ›› Issue (3): 841-847.

• Geotechnical Engineering • Previous Articles     Next Articles

Optimal analysis of construction schemes of small space tunnel with bidirectional eight traffic lanes in jointed rock mass

JIANG Kun1, 2, XIA Cai-chu1, BIAN Yue-wei1   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Dalian Municipal Design and Research Institute Co., Ltd., Dalian, Liaoning 116001, China
  • Received:2010-10-26 Online:2012-03-10 Published:2012-03-12

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Abstract: According to the construction conditions of Kuiqi No.2 small-space tunnel with super-large cross-section and eight traffic lanes in the second phase project of Fuzhou International Airport Highway, a discrete element analysis program is established to simulate the construction process. In the program, the double-heading construction method, CRD method and CD method have been simulated. The settlements of vault, horizontal deformations of middle rock pillar, horizontal deformations of surrounding rock and plastic zone of surrounding rock are analyzed and the advantages of the three methods are compared. Considering the characteristics of Kuiqi No.2 Tunnel, the practical construction scheme is optimized. The double-heading method is changed to CRD method at the tunnel entrance. The modification of construction method has great contribution to cut down the cost and to reduce erection time. The results provide some reasonable references to design and construction for similar engineering.

Key words: joined rock mass, small space tunnel, super-large cross-section, construction scheme, optimization analysis

CLC Number: 

  • U 455
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