Abstract：
Several collapses occurred during the construction of the Qingshui tunnel on the Lanzhou-Chongqing railway. Based on the analysis of their causes, relevant control measures like spoil backfilling combined with temporary supports, condulet grouting, pipe roofing, cavity plugging with C20 concrete and 0.5 m thick fine sand as well as replacing the clearance-intrusion arch were carried out. A comprehensive analysis was also conducted using the LTD ground penetrating radar (GPR) test, Midas GTS numerical simulation and monitoring and measurement, which showed that these treatments are effective with results that meet the engineering requirements.
QI ,
SU 1,
WANG Li-Ying-2 etc
.Analysis of the Treatment of Collapses in the Qingshui Tunnel
on the Lanzhou-Chongqing Railway
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(2): 172-177
2014, Vol. 51 