基于绍兴盾构施工地表沉降的Peck公式修正  

Modification of Peck formula based on surface settlement of shield construction in Shaoxing

作　　者：吴祥泰 朱金贤 李建强 WU Xiangtai;ZHU Jinxian;LI Jianqiang(Shaoxing Rail Transit Group Co.,Ld.,haoxing 312000 Zhejiang,China)

机构地区：[1]绍兴市轨道交通集团有限公司,浙江绍兴312000

出　　处：《工程建设》2022年第6期30-35,共6页Engineering Construction

摘　　要：Peck公式法是目前预测盾构施工引起地表沉降最简单同时也是最广泛的方法,但因其存在一定的局域性,在应用前应先进行基于研究区域工程实测资料的验证工作。本文以绍兴市轨道交通1号线某盾构区间为例,取40组监测断面的地表沉降数据,利用线性回归方法,通过引入Peck公式两个修正参数:地表最大沉降修正参数α、沉降槽宽度修正参数β,对绍兴深厚软土地层盾构施工引起的地表沉降进行研究,提出了符合绍兴软土地层特点的Peck修正公式,并取其他盾构区间实测数据进行验证。研究结果表明:当α在0.368~0.818范围内,β在0.946~1.118范围内,修正后的Peck公式与修正前的相比获得的预测曲线更贴近工程实际。The Peck formula method is currently the simplest and the most extensive method for predicting ground settlement caused by shield construction.However, due to its locality, the verification work based on the measured data of the research area should be carried out before application.Taking a shield section of the No.1 line of Shaoxing City as an example, the surface settlement data of 40 groups of monitoring sections are taken, and the linear regression method is adopted to introduce two correction parameters of the Peck formula: the maximum surface settlement correction parameter α,the settlement groove width correction parameter β is to study the ground settlement caused by the shield construction of the Shaoxing deep soft soil layer, the peck correction formula in line with the characteristics of Shaoxing soft soil layer is proposed, which is verified by the measured data of other shield sections.The results of the study show that when α is in the range of 0.368~0.818 and β is in the range of 0.946~1.118,the revised Peck formula is closer to the engineering reality than the predicted curve obtained before the revision.

关 键 词：盾构施工 PECK公式 地表位移 修正系数 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]