关于地下厂房纵轴线方位的优化设计

Optimized Design on the Direction of Longitudinal Axle of Underground Plant

从地下洞室周边切向应力的英格里(Inglis)公式出发,提出针对不同环境的地应力场进行地下厂房纵轴线方位优选的简便方法,并编程计算了四川二滩等多个地下厂房不同纵轴线方向所对应的洞室周边切向应力,分析不同纵轴线方向条件下洞室周边切向应力的极值,并与实际工程所选取的纵轴线方向所对应的切向应力值比较,讨论了工程所选纵轴线的合理性以及洞室周边应力的集中程度。结果表明,通过地下厂房纵轴线方位的合理选取可以改善围岩的应力状态和稳定性,减小洞壁切向应力的集中程度。

Based on the Inglis formula, which calculates the tangential stress of the surrounding rock of geological stress field in different circumstances, programme is developed to compute the corresponding tangential stress of the surrounding rock of several underground plants, for instance, Ertan project of Sichuan according to different directions of longitudinal axle. The tangential stress limit of the surrounding rock of the underground cavity is analyzed for different direction of longitudinal axle, then the result is compared with the actual project on the tangential stress, finally, the rationality of the choosed longitudinal axle, the concentrating degree of the surrounding stress of the underground cavern are disscussed. The result shows reasonable direction selection of longitudinal axle can improve the stress state and stability of the surrounding rock of the underground plant and reduce the concentration degree of tangential stress surrounding the cavity.