刘俊杰, 刘俊伟, 任晓敏,等.土岩复合地层隧道盾构开挖地表沉降Peck公式修正[J].河南理工大学学报（自然科学版）,2022,41(2):171-177.

LIU J J, LIU J W, REN X M, et al. Modification of Peck formula for ground settlement caused by shield tunneling in soil-rock composite stratum[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(2):171-177.

土岩复合地层隧道盾构开挖地表沉降Peck公式修正

刘俊杰1, 刘俊伟1,2, 任晓敏3, 贾宁1

1.青岛理工大学 土木工程学院,山东 青岛  266033;2.山东半岛蓝色经济区工程建设与安全协同创新中心,山东 青岛  266033;3.中建八局轨道交通建设有限公司,江苏 南京  210046

摘要:为了准确预测土岩复合地层中隧道盾构开挖引起的地表沉降量,采用数理统计中的线性回归拟合方法,对青岛地铁8号线某区间隧道盾构掘进时的地表沉降监测数据进行拟合,并引入地表最大沉降修正系数a和沉降槽宽度修正系数G对Peck公式进行修正。结果表明,采用线性回归方法拟合隧道横断面地表沉降得到的曲线与实际数据吻合度高,修正系数α∈（0.2, 0.5） , β∈ （1.0,1.4）时得到的修正Peck公式精度最高,对应回归常数项α∈（1.6,2.8）,回归线性系数b∈（0.010,0.022）得到的线性拟合曲线吻合度高。研究成果成功了预测青岛地铁8号线开挖过程中地表沉降量,还可为类似土岩复合地层中隧道盾构施工提供一定的理论指导。

关键词:土岩复合地层;盾构隧道;地表沉降;Peck公式;修正系数;线性拟合

doi:10.16186/j.cnki.1673-9787.2020060011

基金项目:国家自然基金资助项目（41502304）

收稿日期:2020/06/03

修回日期:2020/09/29

出版日期:2022/03/15

Modification of Peck formula for ground settlement caused by shield tunneling in soil-rock composite stratum

LIU Junjie1, LIU Junwei1,2, REN Xiaomin3, JIA Ning1

1.School of Civil Engineering, Qingdao University of Technology, Qingdao  266033 , Shandong, China;2.Cooperative Innovation Center of Engineering Construction and Safety of Shandong Peninsnla Blue Economic Zone, Qingdao  266033 ,Shandong, China;3.Rail Transit Construction Co. ,Ltd. of China Construction Eighth Engineering Division Co. , Ltd. , Nanjing  210046 , Jiangsu, China

Abstract: In order to accurately predict the amount of ground settlement caused by shield tunnel construction in soil-rock composite stratum,the linear regression fitting method in mathematical statistics was adopted to fit the monitoring data of land subsidence of shield tunneling in a certain section of Qingdao metro line 8,and the Peck formula was corrected by introducing the correction coefficient α of the maximum surface settlement and the correction coefficient β of the settlement trough width.The results showed that the curve obtained by using linear regression to fit the horizontal settlement of the earth's surface had a high degree of agreement with the actual data,and the fitting result was highly significant,the accuracy of the modified Peck formula was the highest when the correction coefficient α was in the range of( 0.2,0.5) ,β was in the range of( 1.0,1.4) ,and the linear fitting curve was obtained when the corresponding regression constant term a was in the range of ( 1.6,2.8) and the regression linear coefficient b was in the range of( 0.010,0.022) .At the same time,the research results could provide some theoretical guidance for shield tunnel construction in similar soil-rock composite stratum.

Key words:soil-rock composite stratum;shield tunnel;surface settlement;Peck formula;correction coefficient;linear fitting

 土岩复合地层隧道盾构开挖地表沉降Peck公式修正_刘俊杰.pdf