摘要
基于传统Peck经验公式,引入断面修正系数进行修正,并研究北京地区砂卵石典型地层下大跨度PBA法施工车站地表沉降规律,通过工程实例验证修正后Peck公式的适用性。研究结果表明,修正后Peck曲线与实测数据吻合较好,可利用部分监测数据较好地预测施工沉降。砂卵石地层沉降槽宽度为8. 75~15. 15m,最大地表沉降为48. 85~77. 61mm,地层体积损失率为0. 365%~0. 860%。
Based on traditional Peck empirical formula,the typical large-span surface settlement rule of PBA station construction is studied in the sand and gravel stratum in Beijing by introduction of profile modification coefficient,and the applicability of Peck correction formula is verified through engineering examples.The results show that higher degree of agreement of monitoring data between the corrected Peck curve and actual data,and the construction settlement of sand and gravel stratum in Beijing can be predicted based on a part of monitoring data.The width of settlement trough of sand and gravel stratum ranges from 8.75~15.15m,the maximum surface settlement value ranges from 48.85~77.61mm,and the formation loss rate ranges from 0.365%~0.860%.
作者
付春青
田世文
刘波
张功
FU Chunqing;TIAN Shiwen;LIU Bo;ZHANG Gong(General Contracting Department of Rail Transit and Municipal Engineering,Beijing Uni-construction Group Co.,Ltd.,Beijing 100029,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing,Beijing 100083,China;BUCEA Jingjing Dafang Engineering Management Co.,Ltd.,Beijing 100044,China)
出处
《施工技术》
CAS
2020年第9期74-77,共4页
Construction Technology
基金
国家重点研发计划(2016YFC080250504)
国家自然科学基金(41472259)。
关键词
地铁
车站
砂卵石地层
沉降
预测
subways
stations
sand and gravel stratum
settlement
prediction
