考虑盾尾注浆隆起的盾构掘进地面位移预测

通过对3个盾构隧道工程实例中盾尾注浆引起的地面隆起的分析，对比了Mindlin解、sa—gaseta法、Verruiit-Booker法、Loganathan—Poulos法、Chi法和Park法6种解析方法及高斯公式预测盾构掘进盾尾注浆引起的地面隆起的适用性，并结合工程实例给出了考虑注浆地面隆起后盾构掘进地面位移计算的修正Peck公式。分析表明：盾尾注浆引起的横断面地面隆起曲线，可以用高斯公式和Chi法较好地拟合，在确定注浆隆起宽度参数K。和沉降影响角口的经验取值后，可预测盾构注浆隆起。考虑注浆隆起的修正Peck公式，可合理地预测包含注浆隆起在内的盾构掘进引起的横断面地面位移。

Prediction of Ground Surface Movements Due to Shield Tunneling with Tail Grouting Heave

Compared with conventional tunneling methods, ground movements behave some different patterns, such as surface heave induced by tail grouting. Through the analysis of ground surface heave due to tail grouting in three cases, the applicability of Gaussian equation and six analytic methods （including Mindlin＇s problem, Sagaseta method, Verruijt-Booker method, Loganathan-Poulos method, Chi method and Park method） to predict ground surface heave induced by tail grouting were verified. Based on case studies, one modified Peck equation was proposed to calculate ground surface movements, including grouting heave due to shield tunneling. The results show that the Gaussian equation and Chi method are applicable to calculate surface heave due to shield tail grouting, and the Modified Peck Equation can predict the total transversal ground surface movements rationally.