深厚软弱地层盾构隧道穿越既有铁路群变形分析和控制技术  

Deformation analysis and control technology of shield tunneling through existed railways in deep and weak stratum

作　　者：朱敏 ZHU Min(Changjiang Institute of Survey,Planning,Design and Research Co.Ltd.,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《水利水电快报》2022年第2期21-27,共7页Express Water Resources & Hydropower Information

摘　　要：为确保盾构隧道在深厚软弱地层中顺利穿越既有铁路群,通过工程类比、加强设计、数值模拟与现场监测数据分析相结合等手段,提出了加强洞内管片设计、加强盾构施工控制、优化推进参数、及时填充注浆、地面路基加固、行车限速、回填道砟的保护措施,以及加大铁路变形监测频率和延长监测时间等一整套盾构隧道穿越既有铁路群的变形分析和控制技术。结果表明:提出的变形分析和控制技术可有效降低盾构隧道对铁路路基的影响,确保铁路运营安全。In order to ensure shield tunnel passes smoothly through existed railways in deep and weak stratum,through a series of study methods,such as engineering analogy,strengthening design,numerical simulation and mon⁃itoring data analysis etc.,a set of techniques for deformation analysis and control were proposed,such as strengthen⁃ing internal segment design,strengthening shield construction control,optimizing propulsion parameters and filling grouting in time,surface subgrade reinforcement,speed limitation,ballast backfilling,and increasing the frequency and time of railway deformation monitoring.The practical results showed that the proposed techniques for deforma⁃tion analysis and control can effectively reduce the impact of shield tunnel construction on railway subgrade and en⁃sure the safety of railway operation.

关 键 词：盾构隧道 软弱地层 变形分析 穿越铁路 铁路路基 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]