基于实测数据的隧道地表沉降Peck经验参数研究  

Peck Empirical Parameters of Tunnel Surface Settlement Based on Measured Data

作　　者：张建全[1] 张克利 姚爱敏 闫宇蕾[1] 程贵方 ZHANG Jianquan;ZHANG Keli;YAO Aimin;YAN Yulei;CHENG Guifang(Beijing Urban Construction Exploration&Surveying Design Research Institute Co.Ltd,Beijing 100101,China;Beijing Key Laboratory of Deep Foundation Pit Geotechnical Engineering of Rail Transit,Beijing 100101,China;Beijing Urban Rail Transit Construction Engineering Co.Ltd,Beijing 100101,China)

机构地区：[1]北京城建勘测设计研究院有限责任公司,北京100101 [2]城市轨道交通深基坑岩土工程北京市重点实验室,北京100101 [3]北京城建轨道交通建设工程有限公司,北京100101

出　　处：《铁道工程学报》2023年第3期89-95,共7页Journal of Railway Engineering Society

基　　金：2017年北京市地方标准制修订计划项目:建设工程第三方监测技术规程子课题;北京市科技新星计划资助项目。

摘　　要：研究目的:地下工程施工诱发的地表沉降预测模型及参数,不仅与施工方法密切相关,更因区域地质条件的变化而具有很大的局限性。为精确获得暗挖隧道地表沉降的Peck模型经验参数,依据北京地区大量岩土工程勘察报告所揭示的不同区域地层岩土力学参数进行区域划分,基于不同区域矿山法和盾构法工程地表沉降监测大数据,利用理论计算与回归分析方法,对Peck公式预测模型参数(沉降槽宽度参数K及地层损失率Vl)进行大量的反演分析,获得不同区域典型地质条件下的经验参数,给出精确参数的取值范围,从而为本地区及类似地质条件下的暗挖工程地表沉降变形预测及工程安全风险管控提供技术支持。研究结论:(1)北京西部砂卵石地层、中部中粗砂地层、东部黏性土地层的暗挖隧道地表沉降Peck公式预测参数的取值范围如下:盾构法隧道沉降槽宽度参数K分别为0.32~0.44、0.34~0.51、0.48~0.73,地层损失率Vl分别为0.60%~1.24%、0.83%~1.38%、1.28%~2.52%;(2)西、中、东部区域矿山法隧道地表沉降Peck公式参数适宜的取值范围如下:沉降槽宽度参数K分别为0.29~0.44、0.47~0.61、0.59~0.70,地层损失率Vl分别为0.97%~1.51%、1.13%~1.90%、1.65%~2.00%;(3)本研究成果可应用于类似地质条件下的暗挖工程领域地表沉降的变形预测。Research purposes:The prediction model and parameters of ground settlement induced by underground engineering construction are not only closely related to the construction method,but also have great limitations due to the changes of regional geological conditions.In order to accurately determine the empirical parameters of the Peck model for the surface settlement of the underground excavation tunnel,the regional division is carried out according to the geotechnical parameters of the strata in different regions revealed by a large number of geotechnical engineering survey reports in Beijing,and based on the large data of the monitoring of the surface settlement of the mining method and the shield method in different regions,the theoretical calculation and regression analysis methods are used,the Peck formula prediction model parameters(settlement trough width parameter K and formation loss rate Vl)have been extensively inverted and analyzed,and the empirical parameters under typical geological conditions in different regions have been obtained,and the range of accurate parameters has been given,which can provide technical support for the prediction of surface settlement and deformation of underground excavation projects and the control of engineering safety risks in the region and similar geological conditions.Research conclusions:(1)The predicted parameters of the Peck formula for the surface settlement of the buried tunnel in the sandy gravel stratum in the west of Beijing,the medium-coarse sand stratum in the middle and the cohesive soil stratum in the east are as follows:the width parameter K of the shield tunnel settlement trough is 0.32~0.44,0.34~0.51,0.48~0.73,and the formation loss rate Vl is 0.60%~1.24%,0.83%~1.38%,1.28%~2.52%,respectively.(2)The appropriate range of Peck formula parameters for surface settlement of mining tunnel in the west,middle and east regions is as follows:the width parameter K of settlement trough is 0.29~0.44,0.47~0.61,0.59~0.70,and the formation loss rate Vl is 0.97%~1.51%,1.13%

关 键 词：暗挖工程 地表沉降 预测参数 风险控制 

分 类 号：P258[天文地球—测绘科学与技术]