The construction method of Tunnel Boring Machine (TBM) is more and more widely used in major national engineering construction such as transportation and water conservancy due to its "safe, efficient and economical" characteristics. However, TBM has poor adaptability to unfavourable geological hazards, such as fault fracture zone, mud outburst and water gushing, resulting in low tunneling efficiency, construction delay and serious economic loss. In order to ensure the safety and smooth tunneling of TBM construction, a comprehensive advanced geological prediction system is put forward. The geological analysis method, seismic wave method and excitation polarization method are used to forecast the unfavorable geological area in advance, and the location of the unfavorable geological body such as fault fracture zone and water body in front of the tunnel face is proved. The research results have been successfully applied to TBM construction section of Xianglushan tunnel in central Yunnan water diversion project. Taking section D1K55+086~D1K54+986 as an example, the comprehensive advanced geological prediction system was adopted to confirm the degree of surrounding rock breakage and groundwater development in front of the tunnel in advance. It provides scientific basis for construction unit and reference for tunnel construction under similar geological conditions.
Yang Hongxia
,
Chen Andong
,
Sun Xingbang
,
Dai Xueyu
,
Meng Songjian
. Practice of TBM Advanced Prediction System for Xianglushan Tunnel in Yunnan Water Diversion Project[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S2)
: 834
-840
.
DOI: 10.20174/j.JUSE.2024.S2.37
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