论文部分内容阅读
为了预测北京地铁7号线隧道开挖引起的地表沉降,基于地铁7号线达官营站的工程地质情况和车站开挖期间地表位移监测资料,采用回归分析方法对实测数据进行了拟合分析,并与经验Peck公式进行了对比研究,由于Peck公式具有很强的地域性,因此采用地表最大沉降量修正系数和沉降槽宽度修正系数对经验公式进行了修正,研究表明,所选取的两个断面中地表最大沉降修正系数α介于0.613-0.620之间,沉降槽宽度修正系数β介于1.584-1.748之间;经过修正的Peck公式所绘出的预测曲线较经验Peck公式绘出的预测曲线精度有大幅度提高,与实测结果更加吻合。
In order to predict surface subsidence caused by tunnel excavation of Beijing Metro Line 7, based on the engineering geological conditions of Daguanying Subway on Line 7 and surface displacement monitoring data during station excavation, the measured data were fitted and analyzed by regression analysis method. And compared with the empirical Peck formula. Because the Peck formula has strong regional characteristics, the empirical formula is modified by using the correction coefficient of the maximum settlement of the earth’s surface and the width of the settling tank. The results show that the two selected sections The correction coefficient α of maximum settlement on the ground surface is between 0.613-0.620 and the correction coefficient β of settlement trough width is between 1.584-1.748. The predicted curve drawn by the modified Peck formula is better than the predicted Peck formula A substantial increase, more in line with the measured results.