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Analysis of Construction Control Parameters in Rock Shield-driven Tunnelling
(1 The Fourth Engineering Co., Ltd, of China Railway No.9 Engineering Group Co., Ltd., Liaoning 110000; 2 Railway Noise and Vibration Environment Engineering Research Center of the Ministry of Education, East China Jiaotong University, Jiangxi 330013;3 National Demonstration Center for Experimental Civil Engineering Education, East China Jiaotong University, Nanchang, Jiangxi 330013)
Abstract There are many factors influencing the construction parameters in shield tunnelling, and regarding the re? search on correlation among the construction parameters in shield tunnelling it is mainly based on theoretical analysis. It is difficult to clarify the influencing factors and mechanism of the construction parameters in shield tunnelling. This paper collects and analyzes the construction control parameters during EPB shield tunnelling in rock strata in Dalian, and the results show that: the correlation between the total thrust and advancing speed, the cutterhead rotation speed and torque, and the screw conveyor rotation speed and torque are all not significant; due to the significant soil arch effect in rock strata and thus the low frictional resistance between the shield shell and the surrounding rock, the total thrust is mainly used to provide the horizontal interaction between the cutterhead and the excavation face; the correlation between the rotation speed of the screw conveyor and the advancing speed of the shield machine is significant; the screw conveyor controls the fullness of the soil chamber through the rotation speed, influencing the excavated soils entering the chamber, so the muck discharge efficiency of the screw conveyor has a significant effect on the advancing speed and cutterhead torque.
Abstract：
There are many factors influencing the construction parameters in shield tunnelling, and regarding the re? search on correlation among the construction parameters in shield tunnelling it is mainly based on theoretical analysis. It is difficult to clarify the influencing factors and mechanism of the construction parameters in shield tunnelling. This paper collects and analyzes the construction control parameters during EPB shield tunnelling in rock strata in Dalian, and the results show that: the correlation between the total thrust and advancing speed, the cutterhead rotation speed and torque, and the screw conveyor rotation speed and torque are all not significant; due to the significant soil arch effect in rock strata and thus the low frictional resistance between the shield shell and the surrounding rock, the total thrust is mainly used to provide the horizontal interaction between the cutterhead and the excavation face; the correlation between the rotation speed of the screw conveyor and the advancing speed of the shield machine is significant; the screw conveyor controls the fullness of the soil chamber through the rotation speed, influencing the excavated soils entering the chamber, so the muck discharge efficiency of the screw conveyor has a significant effect on the advancing speed and cutterhead torque.
YIN Sujiang1 YAN Shishun1 PEI Baizheng1 HUANG Dawei2,
3
.Analysis of Construction Control Parameters in Rock Shield-driven Tunnelling[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(4): 218-223
2021, Vol. 58 