Peck修正公式在富水砂卵石地层盾构隧道地表沉降预测中的适用性研究  

Research on the applicability of Peck modified formula in surface subsidence prediction of shield tunnel with water-rich sand and pebble formation

作　　者：杨峰峰 晏红波 田力[1] 孙广 樊行鑫 Yang Fengfeng;Yan Hongbo;Tian Li;Sun Guang;Fan Xingxin(Hebei Construction Survey and Research Institute Co.,Ltd.,Shijiazhuang 050031,China;College of Geomatics and Geoinfbrmation,Guilin.University of Technology,Guilin 541004,China;Guangxi Key Laboratory for Spatial Information and Geomatics,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]河北建设勘察研究院有限公司,石家庄050031 [2]桂林理工大学测绘地理信息学院,广西桂林541004 [3]广西空间信息与测绘重点实验室,广西桂林541004

出　　处：《工程勘察》2021年第11期72-78,共7页Geotechnical Investigation & Surveying

摘　　要：Peck公式在不同地质环境下预测盾构隧道掘进过程中引起地表沉降有着广泛的应用。在成都富水砂卵石地层中,通过对地铁8号线和9号线的不同直径的盾构隧道实施回归分析,同时加入2个修正系数:一个是α,另一个是β。倘若Peck表达式修正系数设定α的值在0.4到1.2这个范围内,β在0.5~1.1区间时,修正得出的Peck公式预测曲线与实测数据曲线更加接近,为以后成都地区地铁修建、规划选线、沉降突变提供数据预测的支持。Peck formula is widely used to predict the ground settlement caused by shield tunneling in different geological environments. In Chengdu water rich sandy cobble stratum, through regression analysis of shield tunnels with different diameters of metro Line 8 and line 9, two correction coefficients are added: one is α, the other is β. If the correction coefficient of Peck expression is set in the range of 0.4 to 1.2, and β is in the range of 0.5 to 1.1, the modified Peck formula prediction curve is closer to the measured data curve, which provides settlement prediction support for future subway construction, planning and route selection, and abrupt subsidence in Chengdu.

关 键 词：PECK公式 盾构隧道 地表沉降 修正系数 沉降预测 

分 类 号：U451[建筑科学—桥梁与隧道工程]