为探明北京地区大直径泥水平衡盾构在复杂互层地层下的掘进参数变化情况，依托北京地区目前最大直径泥水平衡盾构工程清华园隧道，使用数理统计的方法针对盾构由粉质黏土掘进至卵石土、砂、粉质黏土互层地层时盾构掘进参数的变化规律及波动情况进行研究。研究结果表明： 泥水平衡盾构在粉质黏土区域掘进时，盾构刀盘转矩及盾构推力波动情况不明显；泥水平衡盾构在复杂互层地质条件下掘进时，盾构刀盘转矩及盾构推力分别增长46.43%和46.03%，同时盾构刀盘转矩的波动情况较粉质黏土区域有所增长，而盾构推力的波动情况与粉质黏土区域类似。

In this paper, the largest diameter slurry balance shield used in Tsinghua Yuan Tunnel in Beijing is taken as an example to study the variation laws of shield parameters driving in interbedded strata of pebble, sand and silty clay by mathematical statistics method. The study results show that: (1) The cutterhead torque and shield thrust force vary little when slurry balance shield driving in silty clay area. (2) The cutterhead torque and shield thrust force increase by 46.43% and 46.03% respectively when slurry balance shield driving in complex interbedded strata comparing to shield driving in silty clay area; the fluctuation of cutterhead torque when slurry balance shield driving in complex interbedded strata is different from that when driving in silty clay area, and the fluctuation of shield thrust force when slurry balance shield driving in complex interbedded strata is similar to that when driving in silty clay area.