中文摘要：

盾构隧道开挖面支护压力的确定一直是隧道工程界普遍关注的核心问题之一。对开挖面支护压力计算的6种模型进行深入的讨论，并在此基础上，针对黏性土地层的特点，修正著名的 Horn 筒仓模型，推导考虑土拱效应的黏性土开挖面支护压力计算公式。以钱江隧道工程为背景，详细分析开挖面支护压力7种确定方法的计算结果，论证各计算方法的工程实用性，并对计算参数的选取进行讨论，为类似工程提供重要的建议值。

英文摘要：

The determination of the face supporting pressure has been one of the key problems in tunnelling engineering. This paper presents a discussion in depth on six different calculating models of the face supporting pressure. Based on the characteristics of clayey soil,the famous Horn′s silo model was modified and the calculation equation on clayey soil,which considers the soil arching effect,was successfully derived. Taking Qianjiang tunnel for example,the calculating results by seven different face supporting pressure methods were analyzed;and their applicability was investigated as well. Detailed discussion on the choosing of calculation parameters was given;so as to provide reference values for similar projects.