摘要
盾构隧道下穿施工引起的地表沉降变形是施工中亟需解决的重要问题,克泥效工法辅助盾构隧道施工是控制地表沉降变形的重要措施。为探究克泥效工法对泥岩地层盾构隧道施工地表沉降变形的影响规律及其控制效果,依托成都轨道交通13号线四川师大站—娇子立交站区间隧道,通过数值模拟研究盾构穿越泥岩地层时克泥效工法对地表变形的影响规律,同时开展室内试验揭示不同原材料配比下克泥效试样的黏度值变化规律,最后在工程中采用克泥效工法辅助施工,验证和分析克泥效工法的有效性。结果表明:(1)采用克泥效浆液充填盾构开挖间隙对地表沉降影响显著,可减少约23.48%的地表最大沉降量;(2)土水比对克泥效浆液黏度影响明显,土水比越小浆液黏度越大,外加剂在一定范围内可以调节浆液黏度;(3)现场实测数据与研究结果一致性较好(误差在10%左右),地表沉降值在工程要求-20 mm之内。
Ground settlement and deformation caused by shield tunnelling is a critical issue that needs to be addressed during construction.The clay shock construction method is an important measure to control surface settlement and deformation during shield tunnelling.To explore the effect law of the clay shock method on surface settlement and deformation in mudstone strata during shield tunnel construction and its control effect,this study uses Sichuan Normal University station to Jiaozili Flyover station running tunnel section of the Chengdu Metro Line 13 as a case study.The research investigates the impact of the clay shock method on surface deformation when tunnelling through mudstone strata,and indoor tests are conducted to reveal the viscosity variation of clay shock samples with different material ratios.Finally,the clay shock method is applied in the field construction,verifying and analyzing its effectiveness.The results indicate:(1)Filling the shield excavation gap with clay shock slurry has a significant impact on surface settlement,reducing the maximum surface settlement by approximately 23.48%;(2)The soil-towater ratio significantly affects the viscosity of the clay shock slurry.The smaller the soil-to-water ratio,the higher the slurry viscosity,and the additives can regulate the slurry viscosity within a certain range;(3)The field measurement data and research results are consistent(with an error of approximately 10%),and the surface settlement value is within the engineering requirement of-20 mm.
作者
张昕阳
申玉生
常铭宇
刘童
孙天赦
胡帅
ZHANG Xinyang;SHEN Yusheng;CHANG Mingyu;LIU Tong;SUN Tianshe;HU Shuai(Key Laboratory of Transportation Tunnel Engineering of the Ministry of Education,Southwest Jiaotong University,Chengdu 610031;Nation Engineering Research Center of Geological Disaster Prevention Technology in Land Transportation,Southwest Jiaotong University,Chengdu 610031;China Railway No.4 Engineering Group Co.,Ltd.,Hefei 230022;The Second Engineering Co.,Ltd.of CTCE Group,Suzhou 215131)
出处
《现代隧道技术》
北大核心
2025年第2期282-290,共9页
Modern Tunnelling Technology
基金
国家重点研发计划(2019YFC0605104)。
关键词
盾构隧道
地表沉降
克泥效工法
室内试验
现场监测
Shield tunnel
Surface settlement
Clay shock construction method
Indoor experiment
Field monitoring
作者简介
张昕阳(1999-),男,硕士研究生,主要从事隧道与地下工程的研究工作,E-mail:1018899739@qq.com;通讯作者:申玉生(1976-),男,博士,教授,博士生导师,主要从事隧道与地下工程方面的教学和科研工作,E-mail:sys1997@163.com.
