Abstract：
The geological condition, design and arrangement of TBM1 construction section of water conveyance tun?
nel of Lanzhou water source construction project are complex and the construction will face challenges, such as mucking by continuous belt conveyor, drainage at the section of variable gradients, treatment of adverse geological section, advanced geological prediction etc. Based on an analysis of the above problems, some specific measures and methods were proposed. Stable operation of continuous belt conveyor at the turning and uphill section is critical, corresponding treatment methods were put forward regarding the common faults; construction drainage systems of branch tunnel downhill section and main tunnel uphill section were designed; a comprehensive advanced geological prediction method combining geological analysis, construction geological sketch and geophysical prospecting was adopted to predict the geological condition in front of the work face, and corresponding measures were taken based on the predicted results in order to avoid or eliminate geological disasters. The TBM1 tunnelling practice shows that the above measures are effective and ensure rapid and safe construction of TBM1 section.
YANG Jihua1 LIANG Guohui2 CAO Jianfeng2 YANG Fengwei1
.Study on Key Techniques for TBM1 Section of the Water Conveyance Tunnel of Lanzhou Water Source Construction Project[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(2): 10-17
2019, Vol. 56 