荒沟蓄能电站地下厂房地应力状态与工程稳定性研究

A Study of Stress State and Engineering Stability of Underground Houses at the Huanggou Accumulation Power Station

为了解黑龙江荒沟抽水蓄能电站地下厂房区应力状态 ,在探洞内布置了 4个地应力测点 ,利用空芯包体应力计进行地应力测量。测量结果表明 :最大主应力近于水平 ,最大主应力量值为 9.6MPa ,最大主应力方向为N78°W。根据实测结果对该区应力作用特征进行了分析 ,测量结果与现今区域构造应力场相吻合。在地应力实测和岩石力学性质试验基础上 ,对地下厂房周边应力状态进行了有限元分析 ,为地下厂房轴线的选择提出了建设性意见。

In order to detect stress state of underground houses at Huanggou accumulation power station in Heilongjiang Province, the authors made stress measurement by means of hollow inclusion gauge method. The results indicate that the maximum principal stress is nearly horizontal, trending N78°W with value of 9.6 MPa. The measurement is consistent with the present regional tectonic stress field. On the basis of stress measurement, rock mechanical testing and finite element calculation, an optimum direction of the long axis of underground houses is suggested from an overall consideration of the measured direction of maximum principal stress, enginee ring geology and construction facilities.