Abstract Based on the excavation of Hangzhou Metro Line 1, the commonly encountered problems for advancing EPB shields in silty soil strata are analyzed, and a corresponding improvement proposal is put forward in this paper. According to the wear regularity of the cutterhead and screw conveyor impeller in practical driving, the effective wear-resisting reinforcement measures are presented by way of an experimental comparison, which achieved good results. Meanwhile, the defects of the original foaming system are optimized and improved for system simplification and cost saving purposes, and the optimal thrust force for this type of stratum is obtained by specific tests of thrust force at all levels. Ultimately, the project is completed safely and efficiently with a series of optimized measures, which can be used as a reference for similar engineering endeavors.
Abstract：
Based on the excavation of Hangzhou Metro Line 1, the commonly encountered problems for advancing EPB shields in silty soil strata are analyzed, and a corresponding improvement proposal is put forward in this paper. According to the wear regularity of the cutterhead and screw conveyor impeller in practical driving, the effective wear-resisting reinforcement measures are presented by way of an experimental comparison, which achieved good results. Meanwhile, the defects of the original foaming system are optimized and improved for system simplification and cost saving purposes, and the optimal thrust force for this type of stratum is obtained by specific tests of thrust force at all levels. Ultimately, the project is completed safely and efficiently with a series of optimized measures, which can be used as a reference for similar engineering endeavors.
WANG Zhan-1,
吕Xue-Jin-2 ,
WANG Jin-Chang-3 etc
.Optimization and Improvement of Shield Construction Measures
in a Silty Soil Stratum
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 186-194
2014, Vol. 51 