| 砂性地层地铁暗挖施工地表沉降预测方法 |
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| 引用本文： | 王亮.砂性地层地铁暗挖施工地表沉降预测方法[J].城市轨道交通研究,2017(12):90-92,96. |
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| 作者姓名： | 王亮 |
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| 作者单位： | 辽宁省交通高等专科学校,110122,沈阳 |
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| 基金项目： | 辽宁省交通高等专科学校优秀青年教师成长支持计划项目 |
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| 摘 要： | 通过对地层沉降机理和地表沉降空间分布形态的分析,对Peck公式进行了修正,把隧道中轴线处地表沉降z中和地表沉降槽的宽度系数i都拓展成y的函数,得到了适用于砂性地层地铁暗挖施工开挖进程的三维空间地表沉降预测方法。根据沈阳地铁实际工程地表沉降实测值反推出预测公式中z中(y)和i(y)的具体形式及其他系数值,并对不同断面横向地表沉降计算值和实测值进行对比分析,结果证明该预测方法可应用于工程实践。
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| 关 键 词： | 砂性地层 地铁暗挖 开挖施工进程 地表沉降 预测方法 |
On Surface Settlement Prediction for Metro Excavation in Sandy Strata |
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| Abstract: | Based on an analysis of the deformation mechanism of strata settlement,the Peck formula is modified.Through expanding the surface settlement along the tunnel axis (Z中) and the width coefficient (i) of the surface settlement trough into the functions of "y",the surface settlement prediction method of three-dimensional space is obtained,which is suitable for sandy strata in metro tunnel excavation process.According to the actually measured surface settlement value of Shenyang metro project,the specific form of z中 (y)and i(y) in the prediction method and other coefficient values are derived reversely.Through a comparison between calculated value and measured value of the surface settlement from different cross sections,the prediction method is verified to be applicable for engineering practice. |
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| Keywords: | sandy strata metro excavation excavation construction process surface settlement prediction method |
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