中南大学学报（自然科学版）2024，Vol.55Issue(3)：1082-1091,10.DOI:10.11817/j.issn.1672-7207.2024.03.021
考虑刀土摩擦的砂土盾构隧道开挖面支护压力计算方法
Calculation method of supporting pressure of shield tunnel excavation face in sand considering friction between cutter and soil
摘要
Abstract
The determination of the face limit supporting pressure is one of the key problems in tunnelling engineering.The friction between cutter and soil is generally ignored,and the calculation results of supporting pressure are conservative.In order to solve the problem,firstly,by considering the influences of the vertical friction between the shield cutter and the cut soil,the horizontal friction between the wedge and the upper soil,and the tunnel depth on the limit supporting pressure,a formula to calculate the limit supporting pressure in sand strata was deduced via trapezoidal wedge model.Secondly,the rationality of the proposed method was verified by comparing with other theoretical results and experimental results.Finally,the influence of friction between cutter and soil on the face limit supporting pressure under different conditions was discussed by parameter analysis.The results show that when other parameters remain unchanged,the face limit supporting pressure decreases almost linearly with the increase of the friction angle between cutter and soil.The friction between cutter and soil has positive influence on the face stability,and the influence on the limit supporting pressure can not be ignored.The stability of the excavation face can be effectively enhanced by properly increasing the friction angle between cutter and soil.The influence of soil-cutter friction on the limit supporting pressure in shallow tunnels is obviously greater than that in deep tunnels,which should be considered in cutter selection of the shield tunnelling.关键词
盾构隧道/砂土地层/支护压力/楔形体模型/土拱效应Key words
shield tunnel/sand strata/supporting pressure/wedge model/arching effect分类
建筑与水利引用本文复制引用
应宏伟,吕忠泽..考虑刀土摩擦的砂土盾构隧道开挖面支护压力计算方法[J].中南大学学报（自然科学版）,2024,55(3):1082-1091,10.基金项目
国家自然科学基金资助项目(51678523) （51678523）
中央高校基本科研业务费资助项目(B200201012) （B200201012）
浙江省建设科研项目(2018K119)(Project(51678523)supported by the National Natural Science Foundation of China （2018K119）
Project(B200201012)supported by the Fundamental Research Funds for the Central Universities （B200201012）
Project(2018K119)supported by the Construction Research Program of Zhejiang Province) （2018K119）
