基于间隙参数法的软土盾构隧道施工不确定性表征  

Characterization of uncertainty in shield tunneling excavated in soft soils based on gap parameter

作　　者：杨文钰 郑俊杰[1,2] 仉文岗 章荣军 梁正斌 陶应建 YANG Wenyu;ZHENG Junjie;ZHANG Wengang;ZHANG Rongjun;LIANG Zhengbin;TAO Yingjian(College of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China;China Railway Eighth Engineering Group First Engineering Co.,Ltd.,Chongqing 400053,China)

机构地区：[1]华中科技大学土木与水利工程学院,湖北武汉430074 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]重庆大学土木工程学院,重庆400045 [4]中铁八局集团第一工程有限公司,重庆400053

出　　处：《岩土工程学报》2024年第S02期107-113,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(52078236,52338007,52122806);国家资助博士后研究人员计划(GZC20242129);广州地铁集团公司科研委托项目(JT204-10011-23001);中铁八局集团有限公司科研委托项目(H20240979)。

摘　　要：为防御软土盾构隧道施工引发过大地层位移的风险,有必要对盾构隧道地层位移进行概率分析。间隙参数法通过将地层损失分为三个分量,详尽地解释了盾构隧道掘进过程中地层损失的来源,基于间隙参数法对盾构隧道掘进过程中众多参数不确定性进行表征,为实现概率分析提供重要前提。基本思路为分别确定三个分量,即等效三维间隙、盾构姿态相关间隙与物理间隙的统计特征。等效三维间隙与盾构姿态相关间隙相对复杂,根据文献给出了与之相关的地层参数与掘进参数的统计特征。物理间隙与注浆效果有直接关系,通过搜集到的地质雷达数据确定注浆填充率,给出了物理间隙的统计特征。To prevent the risk of displacement induced by shield tunneling,it is necessary to conduct probabilistic analysis.Gap parameter explains the source of ground loss in detail by dividing the ground loss into three parts.Based on it,the uncertainty of many parameters in the shield tunneling process is characterized,which provides an important prerequisite for probability analysis.The main idea is to obtain the statistics of three components of the gap parameter:three-dimensional equivalent gap u*3D,gap due to workmanshipωand physical gap g.The three-dimensional equivalent gap u*3D and the gap due to workmanshipωare relatively complicated,and the statistics of the relevant geological and tunneling parameters are given according to the literatures.The physical gap g is directly related to the grouting effects.The filling rate of grouting is determined by the geological radar data,and the statistics of the physical gap are given.

关 键 词：软土 盾构隧道 间隙参数 地层变形 不确定性 

分 类 号：TU432[建筑科学—岩土工程]