Discussion on Classification Methods of Special Surrounding Rock of Tunnels CHEN Shoutang, WU Qiujun, YANG Jiaxi, SU Peng, JIANG Li

Tunnel Construction ›› 2011, Vol. 31 ›› Issue (3): 307-310.

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Discussion on Classification Methods of Special Surrounding Rock of Tunnels CHEN Shoutang, WU Qiujun, YANG Jiaxi, SU Peng, JIANG Li

CHEN Shoutang, WU Qiujun, YANG Jiaxi, SU Peng, JIANG Li

Southwest Jiaotong University, Chengdu 610031, China

Received:2011-01-25 Revised:2011-05-18 Online:2011-06-20 Published:2011-07-08

Abstract

Abstract:

The classification methods of special surrounding rocks of tunnels in loess, swelling soil and fault and fracture zones in China and abroad are summarized. Parameters that can reflect the characteristics of the special surrounding rocks of tunnels are obtained. The study shows that loess can by classified by considering the geologic age, natural water content and dry density, swelling soils can by classified by considering the plastic index, free swelling rate and normal water content and fault and fracture zones can be classified by considering the geological and mechanical characteristics.

Key words: special surrounding rock, classification method, loess, swelling soil, fault and fracture zone

CHEN Shou-Tang, TUN Qiu-Jun, YANG Jia-Xi, SU Feng, JIANG Li. Discussion on Classification Methods of Special Surrounding Rock of Tunnels CHEN Shoutang, WU Qiujun, YANG Jiaxi, SU Peng, JIANG Li[J]. Tunnel Construction, 2011, 31(3): 307-310.

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Discussion on Classification Methods of Special Surrounding Rock of Tunnels CHEN Shoutang, WU Qiujun, YANG Jiaxi, SU Peng, JIANG Li

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