基于回归正交试验的高地应力TBM隧道变形影响因素敏感性研究  

Study on Influencing Factors of Surrounding Rock Deformation of TBM Tunnel With High Ground Stress Based on Regression Orthogonal Test

作　　者：任道远 高新强[1,2,3,4] 马泽骋 樊浩博 朱正国 REN Daoyuan;GAO Xinqiang;MA Zecheng;FAN Haobo;ZHU Zhengguo(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Key laboratory of Mechanics Behavior Evolution and Control of Transport Engineering Structures,Shijiazhuang 050043,China;Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mine,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043 [2]石家庄铁道大学土木工程学院,石家庄050043 [3]河北省交通工程结构力学行为演变与控制重点实验室,石家庄050043 [4]河北省金属矿山安全高效开采技术创新中心,石家庄050043

出　　处：《铁道标准设计》2024年第6期121-128,共8页Railway Standard Design

基　　金：中国铁建股份有限公司科技重大专项(2019-A05);石家庄铁道大学研究生创新资助项目(YC2022017)。

摘　　要：依托某国家重点铁路工程隧道穿越高地应力TBM施工段,通过精细化三维数值模拟与回归正交试验相结合,运用多元线性回归方法对试验结果进行研究,分析不同支护因素的敏感性并判明其对控制围岩变形起到的利弊作用,同时得到该试验的一次回归方程,为结构优化提供快速计算公式,以此来调整参数,优化支护结构。一次回归正交试验选取短锚杆长度、长锚杆长度、钢拱架间距、锚杆环向和纵向间距、喷射混凝土等级与地应力水平作为研究影响因素,采用L8(27)正交表,不考虑交互作用进行回归正交试验,计算常数项与各偏回归项系数,建立回归方程,对试验结果进行方差分析与失拟性检验。检验结果表明:因素地应力水平F值大于F0.001,地应力水平对围岩变形起到决定性影响,短锚杆长度、钢拱架间距与锚杆纵向间距的F值均大于F0.025,其均对控制围岩变形有显著影响;所建立的回归方程显著,失拟性检验不显著,回归方程具有较好的拟合程度。在设计施工时首先应考虑采取措施释放地应力,其次在选取支护参数时应将短锚杆长度、钢拱架间距与锚杆纵向间距纳入重点考虑内容。This paper,based on a national key railway project crossing the high ground stress TBM construction section,studies the test results by means of the combination of refining three-dimensional numerical simulation and regression orthogonal design experiment and multiple linear regression method.The sensitivities of different supporting factors are studied,their advantages and disadvantages in controlling surrounding rock deformation are identified.At the same time,multiple linear regression equation of the experiment is obtained,which provides a fast calculation formula for structural optimization,so as to adjust the support parameters and optimizing the structure.In linear regression orthogonal experiment,the length of short anchor bolt,the length of long anchor bolt,the longitudinal spacing of steel arch,the circumferential and longitudinal spacing of anchor bolt,and the shotcrete grade and ground stress level are selected as the influencing factors.Regression orthogonal design experiment with L8(27)orthogonal table is conducted without considering interaction effect.The constant term and coefficients of partial regression term are calculated,and the multiple linear regression equation is established,and the results are analyzed in terms of variance and testing lose effectiveness of fit.The results show that the F value of ground stress is greater than F0.001,and the ground stress has a decisive influence on the deformation of the surrounding rock.The F values of the length of short anchor bolt,the longitudinal spacing of the anchor bolt and steel arch are all greater than F0.025,which have a significant impact on controlling the deformation of the surrounding rock.The established regression equation is significant,the test of misfit is not significant,so the regression equation has a good degree of fitting.Therefore,measures should be taken to release ground stress in design and construction first,and then the length of short anchor bolt,the spacing of steel arch and the longitudinal spacing of anchor bolt shoul

关 键 词：高地应力隧道 回归正交试验 三维数值分析 多元一次回归方程 敏感性研究 多重联合支护 失拟性检验 

分 类 号：U25[交通运输工程—道路与铁道工程] U459.1[建筑科学—桥梁与隧道工程] U455