›› 2006, Vol. 27 ›› Issue (4): 667-672.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Three-dimensional mechanical effect analysis of two types of midboard for double span-arch-connecting tunnel

LI Qiang1, 2, WANG Ming-nian2, LI Yu-wen3   

  1. 1. The Fourth Survey & Design Institute of China Railway, Wuhan 430063, China; 2. Department of Underground and Tunnel Engineering, Southwest Jiaotong University, Chengdu 610031, China; 3. Sichuan Provincial Communications Department Highway Planning Survey Design ＆Research Institute, Chengdu 610041, China
  • Received:2004-08-09 Online:2006-04-10 Published:2013-11-05

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Abstract: Aiming at open problems in the design and construction of double span arch-connecting tunnel, a research on three-dimensional stress characteristics of two types midboard is carried out by means of finite difference method FLAC3D2.0; and their merits and demerits, as well as applicable conditions are analyzed. The result shows that stress of separated type curved wall is more proper than integral type stalk on shallow depth double span arch-connecting tunnel in the condition of II type rock; inner force of midboard has been in stabilization when left cavern heading face drives to three times diameter from researched cross-section; while right and left cavern heading face drives to (–1–1)D time diameter from reseached cross-section, inner force of midboard greatly changes, and these constructions are key processes.

Key words: double span arch-connecting tunnel, midboard, three-dimensional mechanical effect, 3-D finite difference method

CLC Number: 

  • U 456
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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