›› 2011, Vol. 32 ›› Issue (10): 2937-2943.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Stability analysis of large shield working well considering effect of diaphragm wall joint

CHU Yi-dun1, CHEN Wei-zhong2, 3, TIAN Hong-ming2, CAO Jun-jie2, GENG Ya-mei 2, CHEN Pei-shuai2   

  1. 1. Second Highway Consultants Co., Ltd., China Communications Construction Company Limited, Wuhan 430056, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China
  • Received:2010-04-27 Online:2011-10-10 Published:2011-10-13

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Abstract: Three mechanical models of diaphragm wall joint, i. e. flexible joint without resistance to shearing and bending, relative rigid joint with resistance to shearing and absolute rigid joint with resistance to shearing and bending, are established based on different effects of transverse stress transferring. In order to choose a reasonable joint for shield working well of Nanjing Weisan-road Yangtze River tunnel, the deformation and mechanical properties of diaphragm wall are analyzed by using above models. The results show that: flexible joint is easy to cause the increase in displacement of diaphragm wall and soil; and finally, leads to increase internal force of supports. Relative rigid joint are able to not only resist the displacement of diaphragm wall, but also decrease stress of diaphragm wall by transferring the stress to the temporary supports and ring beams; Absolute rigid joint may result in diaphragm wall undertake significant transverse and longitudinal moment. By comprehensive consideration, the relative rigid joint is chosen for the working well.

Key words: shield working well, diaphragm wall, joint model, numerical simulation

CLC Number: 

  • U 456
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