铁路大直径泥水盾构穿越复杂地层同步注浆技术研究
Research on simultaneous grouting technology for large-diameter slurry shield tunneling through complex strata
曹新华1
作者信息
- 1. 中铁十四局集团有限公司,山东 济南 250014
- 折叠
摘要
大直径盾构施工穿越淤泥质黏土、淤泥质粉质黏土、粉质黏土、粉砂及海河地震段断裂带等复杂地层,管片上浮是造成质量问题的重要原因.结合理论分析,同步注浆宜采用双液注浆技术,实践效果显著,科技含量高,通过注浆前后监测情况对比,地表沉降变化小,保压效果好,管片上浮和错台量小,无其他异常情况,验证了工程盾构同步注浆技术的安全性、可行性.
Abstract
In large-diameter shield tunneling,navigating through complex strata such as muddy clay,silty clay,sandy clay,and the seismic fault zones of rivers presents significant challenges.One major cause of quality issues is the buoyancy of the segments.Based on theoretical analysis,it is recommended to employ double-liquid grouting technology during synchronous grouting.This approach has shown remarkable practical effects and high technological content.Comparative monitoring before and after grouting indicates minimal surface settlement,effective pressure maintenance,reduced segment buoyancy,and negligible misalignment,with no other abnormal conditions observed.This validates the safety and feasibility of the synchronous grouting technique used in shield tunneling projects.
关键词
同步注浆/双液浆/管片上浮/复杂地层Key words
simultaneous grouting/dual-fluid grout/segment floating/complex strata引用本文复制引用
出版年
2024
NETL
NSTL
万方数据