摘要
初始地应力是分析工程中围岩稳定性与支护结构的重要参数之一.本文根据某水电站地下厂房区的地应力实测资料,考虑岩体的自重和地质历史构造运动对地应力场的影响,采用多元回归分析法对厂区地应力场进行多元线性回归分析.得出厂区初始地应力函数与应力分布变化规律.反演得到的地应力回归值与实测值在数值大小和应力方向上基本吻合,表明反演获得的地下厂区初始地应力场合理可靠,为地下厂房区的开挖及长期稳定性分析提供重要计算依据.
Initial in-situ stress is one of the important parameters to analyze the stability of surrounding rock and supporting structure in engineering.Based on the measured data of in-situ stress in the underground powerhouse area of a hydropower station,considering the influence of the dead weight of rock mass and the tectonic movement in geological history on the in-situ stress field,this paper adopts multiple regression analysis method to analyze the in-situ stress field of the plant area,and obtains the initial in-situ stress function and the change rule of stress distribution.The regression values of in-situ stress obtained by inversion are basically consistent with the measured values in terms of numerical magnitude and stress direction,which indicates that the initial in-situ stress field of underground plant obtained by inversion is reasonable and reliable.It provides an important calculation basis for excavation and long-term stability analysis of underground powerhouse area.
作者
程王润
张文春
刘英
CHENG Wang-run;ZHANG Wen-chun;LIU Ying(School of surveying and prospecting engineering,Jilin Jianzhu university,Changchun 130118,China)
出处
《吉林建筑大学学报》
CAS
2021年第6期12-18,共7页
Journal of Jilin Jianzhu University
关键词
地应力场
有限元
多元线性回归
反演分析
in-situ stress field
the finite element
multiple linear regression
the inversion analysis
