中文摘要：

泥水盾构在高强度基岩地层中掘进,盾构自身刀具无法有效破岩,采用基岩爆破预处理的控制钻爆法能严格控制破碎碴块体量,提高刀具破岩能力,但盾构施工过程中,掘进参数与岩石之间关系非常复杂。以台山核电站取水隧道为背景,对现场获得的工作数据进行挖掘,分析基岩爆破前后地层中盾构刀盘推力、刀盘扭矩及掘进速度的参数的选用特点。在此基础上,引入参数转换量FPI、TPI指数及比能进行研究,研究表明,未经处理基岩地层,岩石强度过高,刀盘推力先达到最大值,但切深很浅,扭矩很难发挥最大能力;经爆破处理后,基岩岩体受到不同程度破碎,盾构机推力及扭矩能有效发挥其功能,掘进效能提高。因此,在盾构机的工作负荷范围内,应依据基岩岩体破碎效果,调整刀盘推力和扭矩,使之更好地适应地层,力争达到高效安全的掘进目的。

英文摘要：

The shield cutter cannot effectively break the rock with the slurry shield tunneling in the high-strength granites, while pretreatment of the bedrock by controlled blasting can strictly control the broken block size to enhance stronger rock breaking capacity, but the relationship between tunneling parameters and rock is very complicated during shield construction. Based on the intake tunnel of Taishan Nuclear Power Station, the field parameters are studied to analyze selection features of thrust force and torque of cutter head and tunneling rate. On this basis, the parameter conversion indices FPI, TPI and specific energy are introduced for analysis. The results show that the rock is too hard in the high-strength granites, the thrust force is close to its peak value, however the penetration is lower, it is too difficult to give full play of the torque capacity of the cutter head. The bedrock is destroyed by blasting to a certain extent, thus the slurry shield can take full advantage of its torque force as well as the thrust. In this situation, the tunneling performance is improved. Therefore the thrust and torque are adjusted to better adapt to the strata within the workload scope of the shield machine according to the fragmentation effect of blasting so as to achieve efficient and safe excavation.