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MODERN TUNNELLING TECHNOLOGY 2019, Vol. 56 Issue (4) :8-15    DOI:
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On Driving Strategy of the Shield Machine with Atmospheric Cutterhead in Mudstone Strata
(Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032)
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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
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ZHOU Wenbo WU Huiming ZHAO Jun
Keywords： Super-large diameter shield   Cutterhead in atmospheric pressure   Mudstone stratum   Driving strategy   Cutter replacement technique   Cutter wear   Mud cake removing by chemical solution     
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
Keywords： Super-large diameter shield,   Cutterhead in atmospheric pressure,   Mudstone stratum,   Driving strategy,   Cutter replacement technique,   Cutter wear,   Mud cake removing by chemical solution     
Cite this article:   
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
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