摘要
为解决浅埋大直径隧道开挖沉降预测受到开挖隆起效应影响的问题,采用有限元数值模拟手段计算,结果表明开挖隆起效应使得地表沉降量明显偏小。基于现场地表的沉降监测结果数据,引入Clough修正公式计算沉降槽宽度系数i,对Loganathan&Puolos公式、Celestino公式进行修正和非线性拟合分析,得出结论:地层损失率Vl未知,修正Loganathan&Puolos公式拟合度最高,Celestino公式根据地层损失率Vl预测地面沉降拟合度最高。联合公式绘制完整的沉降预测曲线与现场监测数据曲线相关性达到85%,趋势基本一致,说明沉降预测理论的预测结果具有较好的预测准确度。
To investigate the impact of the excavation uplift effect on the settlement prediction of shallow-buried largediameter tunnels,finite element numerical simulation method is used to conduct calculations.The results show that the excavation uplift effect results in the ground settlement is significantly smaller.Based on the settlement monitoring data of the on-site ground surface,the Clough modified formula is introduced to calculate the width coefficient i of the settlement trough.The Loganathan&Puolos and Celestino formulas are modified and non-linear fitting analysis is carried out.It is concluded that the formation loss rate Vlis unknown,and the fitting degree of the modified Loganathan&Puolos formula is the highest,and the fitting degree of the Celestino formulas is the highest for land subsidence based on the formation loss rate Vl.The correlation between the complete settlement prediction curve drawn by the combined formula and the on-site monitoring data curve reaches 85%,and the trend is basically the same,indicating that the prediction method has a good prediction accuracy.
作者
张继超
曾垂刚
崔乐健
杨振兴
孙飞祥
翟乾智
ZHANG Jichao;ZENG Chuigang;CUI Lejian;YANG Zhenxing;SUN Feixiang;ZHAI Qianzhi(State Key Laboratory of Shield Machine and Boring Technology,Zhengzhou 450001,Henan,China;China Railway Tunnel Group Co.,Ltd.,Guangzhou 510000,Guangdong,China;China Railway Tunnel Stock Co.,Ltd.,Zhengzhou 453000,Henan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2022年第S01期274-280,共7页
Tunnel Construction
基金
河南省科技攻关计划(212102310282)
广东省重点领域研发计划(2019B111108001)
中国中铁重大专项(2018-专项-Ⅱ类-03)
中铁隧道科技开发计划(隧研合2017-05)
