盾构隧道开挖引起的深层土体沉降槽宽度参数取值分析  

Analysis of the Parameter Values for Settlement Trough Width Induced by Shield Tunnel Excavation in Deep Soil

作　　者：祁军 王忠杰 陈子君 林存刚 谢稳江 梁禹 赵茗洁 赵辰洋 QI Jun;WANG Zhongjie;CHEN Zijun;LIN Cungang;XIE Wenjiang;LIANG Yu;ZHAO Mingjie;ZHAO Chenyang(Guangdong Zhuzhao Railway Co.,Ltd.,Guangzhou 510000;Guangdong Key Laboratory of Marine Civil Engineering,Guangdong Research Center for Underground Space Exploitation Technology,School of Civil Engineering,Sun Yat-sen University,Guangzhou 510275;State Key Laboratory for Tunnel Engineering,Guangzhou 510275;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,519082)

机构地区：[1]广东珠肇铁路有限责任公司,广州510000 [2]中山大学土木工程学院广东省海洋土木工程重点实验室广东省地下空间开发工程技术研究中心,广州510275 [3]隧道工程灾变防控与智能建养全国重点实验室,广州510275 [4]南方海洋科学与工程广东省实验室(珠海),珠海519082

出　　处：《现代隧道技术》2024年第5期29-41,共13页Modern Tunnelling Technology

摘　　要：为了研究盾构开挖引起的深层土体沉降槽形态的变化规律,对既有的深层沉降经验公式进行总结,根据收集的21组黏土地层、20组砂土地层和8组卵石地层的现场实测和模型试验案例,对沉降槽宽度参数K(z)取值进行反演分析。研究得出,在任意地层中,使用双曲线形式和幂函数形式的经验公式都能较好地描述隧道开挖引起的沉降槽宽度参数K(z)随埋深比的变化趋势,在黏土和砂土地层中各经验参数的建议值分别为c=0.323、0.197,n=0.479、0.456;卵石地层中,沉降槽宽度参数与埋深比呈简单的线性关系。To investigate the variation patterns of the deep soil settlement trough shape caused by shield tunnel excavation,existing empirical formulas for deep settlement were summarized.Based on the collected field measurements and model test cases—21 groups for clay,20 groups for sandy soil,and 8 groups for gravel—the settlement trough width parameter K(z)was analyzed through back-calculation.The findings indicate that in any type of stratum,both hyperbolic and power function empirical formulas can effectively describe the trend of the settlement trough width parameter K(z)with the depth ratio.The recommended empirical parameter values for clay and sandy soil are c=0.323、0.197,and n=0.479、0.456,respectively.In gravel layers,the settlement trough width parameter shows a simple linear relationship with the depth ratio.

关 键 词：盾构隧道 深层土体沉降 经验公式 沉降槽宽度参数 

分 类 号：U456.1[建筑科学—桥梁与隧道工程]