Abstract：
Shield tunnelling in mudstone strata confronts severe challenges like low advancing efficiency and high cutter wear rate. Cutter replacing under atmospheric pressure improves the efficiency of cutter replacement and evades the risk of cutter replacement under high pressure, but this inevitably brings about a more serious problem of cutterhead clogging caused by mud cake which accelerates the cutter wearing progress. Based on the river-crossing tunnel at Sanyang road of Wuhan city, it studied the encountered technical problems and corresponding countermea?sures during tunnelling, summarized and evaluated the effect of optimization of cutting tool configuration, reform of central flushing system and mud cake removing by chemical way on improving efficiency of shield driving by a parametric analysis on the monitoring data at site. The results show that the method mentioned in this paper can effectively improve the efficiency of tunnel driving, reduce the frequency of cutter replacement and the risks of shield downtime
ZHOU Wenbo WU Huiming ZHAO Jun
.On Driving Strategy of the Shield Machine with Atmospheric Cutterhead in Mudstone Strata[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(4): 8-15
2019, Vol. 56 