TBM法隧道施工效能与岩石力学参数相关性研究

Research on correlation between tunnel construction efficiency of TBM method and rock mechanics parameters

本文以重庆轨道交通4号线二期王家城站—生基堡站区间隧道为背景,运用SPSS回归分析软件研究凿碎比功、磨损宽度与岩石弹性模量、单轴抗压强度、泊松比、完整性系数、软化系数和纵波速度的相关关系,并验证公式的可靠性。结果表明:在单因素相关分析中,除与泊松比的相关性较低外,凿碎比功、磨损宽度与其他参数均具有较高的相关系数R;在多因素回归分析中,凿碎比功与岩石单轴抗压强度和软化系数高度相关,磨损宽度则与岩石单轴抗压强度和完整性系数高度相关;在验证拟合公式的过程中发现,提出的凿碎比功公式和磨损宽度拟合公式均具有较高的参考价值。

Based on the tunnel between Wangjiacheng station and Shengjibao station of Chongqing rail transit line 4,SPSS regression analysis software is used to study the correlation between the chiseling specific work,wear width and rock modulus of elasticity,uniaxial compressive strength,Poisson’s ratio,integrity coefficient,softening coefficient and longitudinal wave velocity,and the reliability of the formula is verified.The results show that,in the single factor correlation analysis,except for the low correlation with Poisson’s ratio,the chiseling specific work,wear width and other parameters are highly related with coefficient R;In multivariate regression analysis,the chiseling specific work is highly correlated with the uniaxial compressive strength and softening coefficient of rock,while the wear width is highly correlated with the uniaxial compressive strength and integrity coefficient of rock.In the process of verifying the fitting formula,it is found that the proposed formula of chiseling specific work and the fitting formula of wear width have higher reference value.