成都富水砂卵石地层EPB盾构出土量参数研究  

Study on EPB Shield Excavation Parameters in Water-Rich Sandy Cobble Stratum in Chengdu

作　　者：张延杰 胡长明[2] 龚晓南[3] 吴荣琴 Zhang Yanjie;Hu Changming;Gong Xiaonan;Wu Rongqin(Yunnan Dianzhong Water Diversion Engineering Co.Ltd.,Kunming 650000,P.R.China;School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,P.R.China;Coastal and Urban Geotechnical Engineering Research Center,Zhejiang University,Hangzhou 31005,P.R.China)

机构地区：[1]云南省滇中引水工程有限公司,昆明 [2]西安建筑科技大学土木工程学院,西安710055 [3]浙江大学滨海和城市岩土工程研究中心,杭州310058

出　　处：《地下空间与工程学报》2022年第6期2005-2015,共11页Chinese Journal of Underground Space and Engineering

基　　金：云南省重大科技专项计划项目(202002AF080003,202102AF080001)。

摘　　要：出土量参数作为土压平衡盾构的主动性控制参数之一,为得到出土量参数对盾构隧道施工影响规律,解决该参数异常对盾构隧道施工的不利影响,通过大数据分析现场掘进数据,对出土量参数进行统计分析和理论推导。研究表明:盾构隧道埋深的大小对盾构掘进的出土量参数无直接影响。得出了成都盾构隧道施工的出土量参数限值的取值范围,给出体积系数α和密度系数β的取值范围,验证了通过使用正态分布统计和T估计法进行富水砂卵石地层下盾构掘进出土量参数处理的可行性。出土量参数研究成果目前只适用于富水砂卵石地层和以砂卵石为主的富水复合地层中。开挖前,运用研究结论可确定开挖区间的出土量取值范围,为实际施工提供建议和参考;开挖过程中,可预测开挖环出土量,也可反推掌子面开挖土层密度,与地勘报告进行对照,以确定实际削切土层,进而及时改变盾构掘进模式和掘进参数。Excavated volume is one of the active control parameters of the earth pressure balance shield. In order to examine the influence of excavated volume on shield tunnel construction, and mitigate potential adverse effects from abnormal data, statistical analysis and theoretical derivation of earth pressure balance shield are carried out by analyzing the field excavation data. Research shows that the buried depth of the shield tunnel has no direct influence on the excavation parameters of shield tunneling. The range of the volume coefficient and density coefficient of the excavated soil is obtained. Also, it is concluded that the normal distribution and T estimation method is suitable in the parameter study of the excavated volume in water-rich sandy cobble stratum. At present, the research results of excavated quantity parameters are only applicable to water-rich sandy cobble stratum and composite stratum dominated by sand cobble. Before excavation, the research conclusions can be used to determine the range of excavated volume. During excavation, the proposed research can predict the excavation volume of the excavation ring, and can also predict the excavation soil density of the face. The shield tunneling mode and tunneling parameters can therefore be adjusted in time.

关 键 词：砂卵石土 盾构隧道 出土量 体积系数 密度系数 

分 类 号：U231.3[交通运输工程—道路与铁道工程]