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根据淋溪河地应力实测值,应用多元线性回归方法获得了地下厂房区的初始地应力场,并在ABAQUS中实现了初始地应力的加载。考虑岩石节理,基于ABAQUS的UEL模块开发了界面单元子程序,在此基础上重点考察了地下厂房开挖过程中围岩应力场及位移场,对洞室围岩稳定性和材料敏感性进行了综合分析,结果表明淋溪河地下厂房洞室群围岩在各种分析工况下能维持稳定状态。
According to the measured data of the stress of the Lixi River, the initial geostress field of the underground workshop area was obtained by using the multiple linear regression method and the initial geostress was loaded in ABAQUS. Considering the rock joints, the UEL module based on ABAQUS developed the interface unit subroutine. On this basis, stress field and displacement field of surrounding rock during excavation of underground powerhouse were investigated emphatically. The stability and material sensitivity of the surrounding rock in the cavern were studied Comprehensive analysis shows that the surrounding rock of caverns in the Lixihe underground powerhouse can maintain a stable condition under various analysis conditions.