摘要
研究浅埋区间隧道开挖引起的地表沉降对维护施工安全、降低施工风险具有十分重要的实际意义,但目前广泛应用的Peck公式对浅埋区间隧道的适用性较差。本文以北京地铁14号线与7号线10个地铁区间工程为背景,基于叠加原理,研究适合于浅埋双线隧道的叠加Peck公式的应用;通过对大量现场监控量测数据进行位移反分析,得到适用叠加公式的区间隧道埋深范围;总结北京地区黏性土与砂性土互层的特定地质条件下浅埋双线隧道开挖引起的沉降槽宽度参数K和地层损失率Vl的取值范围;通过实际工程的验证,证明所研究的沉降公式的有效性与可靠性,结果可为北京地区后续的地铁建设提供参考和依据。
Study on the surface subsidence caused by shallow buried tunnel excavation has very important practical significance. However,the application of Peck formula to the shallow buried tunnel is not so well. Taking the excavation of the 10 subway sections from line 14 and line 7 in Beijing area as background,based on superposition principle,suitable application of Peck formula for shallow buried double lines subway tunnel was deduced. A large amount of field monitoring data is used to back analysis the displacement of typical sections to obtain the suitable depth range of the tunnel for the revision of the formula. The range of the trough width parameters and the volume loss in the specific geological conditions of the shallow buried tunnel in Beijing area is summarized. Suggested method is proven and verified by practical engineering projections and it can provide reference and guidance for the follow-up subway construction in Beijing area.
出处
《地下空间与工程学报》
CSCD
北大核心
2016年第S1期225-231,239,共8页
Chinese Journal of Underground Space and Engineering
关键词
隧道工程
双线隧道
PECK公式
地表沉降
沉降槽宽度
tunnel engineering
double line tunnel
Peck formula
surface subsidence
trough width parameter
