ISSN 2096-4498
CN 44-1745/U
ISSN 2096-4498
CN 44-1745/U
Discussion and Prospects on TBM Pilotheading and Enlarging Method
Received date: 2014-11-07
Revised date: 2014-12-18
Online published: 2015-02-11
In this paper, the concept and effect of pilotheading method are presented, and the characteristics and applicable conditions of pilotheading method are analyzed. The construction schedules of 3 tunnels located in different geological conditions are simulated in terms of excavation and primary support, and comparison and contrast is made between simulated construction schedules and actual/designed construction schedules. Conclusions drawn are as follows: 1) TBM pilotheading method is not suitable for singletube tunnels located in soft, weak and fractured strata; 2) Instead of other construction galleries, TBM pilotheading method may be adopted for singletube tunnels. 3) Twin TBM pilotheading method is suitable for twintube extralong tunnels, which has advantages in terms of construction schedule, cost and coping with unfavorable geological conditions; 4) TBM pilotheading method is suitable for the construction of tunnels in Sichuan and Chongqing area. Finally, the application of TBM pilotheading method is prospected.
Key words： tunnel; TBM pilotheading; enlarging method; drilling and blasting method
WANG Lichuan , CHEN Haiyong , WANG Zhanjun , XU Runze , PAN Jianping , CHEN Hongyu . Discussion and Prospects on TBM Pilotheading and Enlarging Method[J]. Tunnel Construction, 2015 , 35(2) : 149 -159 . DOI: 10.3973/j.issn.1672-741X.2015.02.009
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