基于实测板桩墙变形数据的地基土层m值的反演分析  

Inversion Analysis of m-Value for Foundation Soil Layer Based on Measured Deformation Data of Sheet Piles Wall

作　　者：赵文虎[1] 杜成斌[1] 钱祖宾[2] 顾明如 

机构地区：[1]河海大学力学与材料学院,江苏南京210098 [2]江苏省水利勘测设计研究院有限公司,江苏扬州225127 [3]江苏省水利建设工程有限公司,江苏扬州225009

出　　处：《江苏水利》2015年第B12期13-15,共3页Jiangsu Water Resources

摘　　要：基于竖向弹性地基梁法，根据板桩墙的水平变形现场测量结果，分析确定作用于竖向弹性地基梁有关土层的m值。研究表明，m值的选取对闸室板桩墙的水平位移和锚杆内力有很大的影响，m值越大墙体水平变形越小。依据m法计算的板桩墙变形与实测值位移最接近的原则，确定出引江河工程场地高程在-2．56—15．0m之间的粉砂土质的m值为2300kN／m4左右。并依据得出的m值对施工不同阶段板桩墙的变形进行了预测，预测值与实测值非常吻合，可为江苏类似地区m值的选取提供重要依据。Based on the monitoring horizontal deformation data of sheet-pile wall, the elastic foundation beam method is used to calculate m-value of foundation soil.The result shows that the selection of m-value has a significant effect on the horizontal displacement of sheet-pile wall and the internal force of the bar. With a greater m-value, a smaller horizontal displacement can be investigated. Based on the principle of the deformation of the sheet-pile wall by the m-value method approaching the monitoring data, the m-value is about 2300 kN/m4 for the silt soil with an elevation between -2.56 and -15.0 m in Yinjiang River engineering site. And the m-value is used to predict the deformation of the sheet-pile wall in different construction phases, the prediction deformation and monitoring data are overall consistent. These results provide an important basis for the selection of m-value in Jiangsu region.

关 键 词：弹性地基梁法 M值 反演分析 板桩结构 

分 类 号：TV551.35[水利工程—水利水电工程]