中文摘要：

通过对杭州庆春路过江隧道施工中泥水盾构掘进参数及地面沉降的分析，讨论泥水盾构掘进参数对地面沉降的影响。分析表明：①适当提高切口泥水和同步注浆压力使地面微量隆起，可抵消部分地层损失，降低地面总沉降量；②及时快速的盾尾同步注浆是减少盾尾地层损失的关键，而单纯增加注浆量并不能起到控制盾尾沉降的作用；③在保证掘进稳定均匀的前提下，提高掘进速度可以降低地面沉降，相反，盾构长时间搁置会加剧地面沉降；④适当降低刀盘扭矩的同时加大转速，可以加快推进速度，减少刀盘的扰动和盾构偏转，同时降低切削土块的尺寸，减少盾构掘进泥浆管堵塞的风险；⑤良好的盾构姿态控制，可以减少超挖以及盾壳对周围土层的摩擦、挤压，从而减少地层损失和固结沉降；⑥盾构掘进所致地面隆起变形较无规则，使得横断面地面沉降偏离高斯曲线分布。

英文摘要：

Through analysis of shield driving parameters and ground settlements in the construction of the Qing-chun Road river-crossing tunnel, the influence of shield driving parameters on ground settlements induced by tunneling were studied. The studies show that： ①Increasing the pressure of slurry and synchronized grouting appropriately can counterbalance some ground loss, so as to reduce the ground settlements. ②The key to reducing shield tail ground loss is to fill the tail void immediately and effectively with synchronized grouting, but it should not be simply increasing the grouting volume. ③With stabilization of the shield driving, higher advance rate leads to smaller ground settlements, whereas long time stop would lead to larger ground settlements. ④Decreasing the torque of the cutter head while increasing the rotational speed can accelerate the shield driving and decrease the disturbance to surrounding soils and revolution of the shield. It can also decrease the size of the muck from working face, so as to avoid the blocking of the slurry pipelines.⑤Good control of the shield posture can decrease over-cut, friction and squeezing between the shield shell and the surrounding soils, so as to decrease the ground loss and consolidation. ⑥The irregular ground heave movements caused the shape of transverse ground settlements deviate from Gaussian curve pattern.