摘要
确定盾构始发试掘进段施工参数,减弱盾构施工对地层的影响一直是地铁盾构隧道施工的难点。以深圳地铁16号线江岭站—东纵站区间隧道盾构始发为例,针对始发井临近既有污水管、始发试掘进段近距离下穿河流等风险,建立数值模型并结合监测数据,研究复杂环境下盾构始发关键施工技术。结果表明:(1)根据监测数据及时调整注浆参数、推力等施工参数并对相应地层进行加固,可显著控制地表及既有建(构)筑物沉降;(2)采用钢套筒方式始发以及TSS管后退式水平注浆加固地层,可以减小盾构始发对既有管线的影响;(3)数值模拟可以反映盾构施工对地表、既有建(构)筑物的影响,为始发试掘进段施工参数提供依据。
Determining the construction parameters for the launching excavation section of shield tunnelling and mitigating the impact of shield construction on the surrounding strata has always been a challenge in subway shield tunnel construction.Taking the shield launching at Jiangling Station of Shenzhen Metro Line 16 as an example,this study establishes a numerical model and combines monitoring data to analyze key construction technologies in a complex environment near the launch shaft,which is close to existing sewage pipes and requires tunnelling beneath a river.The results indicate that:(1)Timely adjustments to grouting parameters,shield thrust,and other construction parameters based on monitoring data,along with reinforcement of the corresponding strata,can significantly control surface setlement and the subsidence of existing buildings and structures;(2)Shield launching from a steel sleeve and using TSS pipes for back-reamed horizontal grouting can reduce the impact on pipelines during shield launching;(3)Numerical simulations can reflect the impact of shield construction on the surface and existing buildings and structures,providing a basis for the construction parameters of the shield launching excavation section.
作者
朱双厅
王胜军
庞先国
潘秋景
ZHU Shuangting;WANG Shengjun;PANG Xianguo;PAN Qiuyjing(Powerchina Huadong Engineering Corporation,Hangzhou 310014;School of Civil Engineering,Central South University,Changsha 410075;China Railway 22nd Bureau Group Rail Engineering Co.,Ltd.,Beijing 102444)
出处
《现代隧道技术》
CSCD
北大核心
2024年第S01期932-940,共9页
Modern Tunnelling Technology
关键词
复杂环境
盾构始发
关键技术
注浆加固
钢套筒始发
Complex environment
Shield launching
Key technologies
Grouting reinforcement
Launching from steel sleeve
作者简介
朱双厅(1990-),男,硕士,高级工程师,主要从事隧道与地下工程设计工作,E-mail:Zhu-st@ecidi.com.
