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Optimization of construction scheme and supporting technology for HJS soft rock tunnel 被引量:8
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作者 Wang Shuren Li Chunliu +1 位作者 Liu Zhaowei Fang Junbo 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期847-852,共6页
For a soft rock tunnel under high stress in jointed and swell soft rock (HJS), two construction schemes pilot-tunneling enlarging excavation and step-by-step excavation were optimized using FLAC20, and the deformati... For a soft rock tunnel under high stress in jointed and swell soft rock (HJS), two construction schemes pilot-tunneling enlarging excavation and step-by-step excavation were optimized using FLAC20, and the deformation effects of the two construction schemes were verified by field tests. Based on engineer- ing geological investigation and mechanical analysis of large deformations, the complex deformation mechanisms of stress expansion and structural deformation of the soft rock tunnel were confirmed, and support countermeasures from the complex deformation mechanism converted to a single type were proposed, and the support parameters were optimized by field tests. These technologies were proved by engineering practice, which produced significant technical and economic benefits. 展开更多
关键词 Soft rock tunnel High stress Deformation mechanism Support parameters optimization
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