摘要
基于修正的非线性的Hoek-Brown屈服准则,对中国首个大型水封式地下洞室变形特性进行研究。采用非线性的Hoek-Brown屈服准则,在考虑渗透力条件下,分析地下洞室开挖后塑性区范围;运用离散元软件UDEC,块体选用H-B模型,根据施工巷道开挖过程中围岩变形情况,对围岩参数进行校正,获得较为可靠的随机节理分布的洞库围岩参数,并分析了节理随机分布的地下洞室开挖后边墙附近的水平方向、竖向、法向及切向的应力变化情况。
Based on the modified nonlinear Hoek-Brown yield criterion,the deformation of the first large water seal underground crude oil storage cavern was studied.Using nonlinear Hoek-Brown yield criterion,the plastic zone of underground cavern after excavation is researched considering the condition of seepage force;Using the discrete element software UDEC,the back analysis for the other parameters of surrounding rock was performed according to the deformation in rock mass around the service tunnel under construction.The distributions of horizontal stress,vertical stress,normal stress and shear stress around the caverns of Joint random distribution after the excavation are analyzed with block choosing H-B model;The research provides reference for surrounding rock support of underground caverns and has important guiding significance to water sealed underground cavern engineering.
作者
尹军涛
平洋
YIN Juntao;PING Yang(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China;Technology Center of China State Construction Engineering Corporation,Beijing 101300,China)
出处
《路基工程》
2018年第A01期85-90,95,共7页
Subgrade Engineering
