›› 2014, Vol. 35 ›› Issue (S2): 481-487.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of spatial effect of excavation face for underground facility and its application

QIAO Li-ping1, LIU Jie2, LI Shu-cai1, WANG Zhe-chao1, JIANG Yan-yan1, WANG Zi-hao3   

  1. 1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 2. Gaotang County People's Government Construction Project Bidding Management Office, Liaocheng, Shandong 252800, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2014-03-16 Online:2014-10-31 Published:2014-11-12

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Abstract: The deformation of rock mass around underground facility is confined by excavation face. Under the confinement, the spatial effect of excavation face is remarkable. Field test was performed to investigate the characteristics of the spatial effect of excavation face. An empirical hyperbolic tangent formula is proposed to describe the spatial effect. The stability of an underground cavern was analyzed using the proposed empirical formula. It is shown from this study that for a certain section, the spatial effect is not the most remarkable when the excavation face is passing the section. For rock mass of low quality, the spatial effect is less significant than that of high quality. The total displacement could not be obtained using the conventional monitoring method, which takes influence on back analysis of mechanical parameters of rock mass. The standard for stability control could be obtained using the principle of spatial effect. This study will benefit the understanding of the spatial effect and provide the reference for the stability control of underground facility.

Key words: underground facility, excavation face, spatial effect, stability, back analysis of parameters, control standard of displacement, empirical equation

CLC Number: 

  • U 45
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