张河湾抽水蓄能电站地应力测量试验研究

Experiment Study on Geostatic Stress for the Zhanghewan Pumped Storage Power Station

张河湾抽水蓄能电站位于河北省石家庄市甘陶河干流上，电站分上、下两个水库．电站水道系统的压力管道水平段、下弯段、尾水洞段以及地下厂房均设在甘陶河群蒿亭组二段上部的变质安山岩中，其抗压强度平均为208．1MPa，静弹模平均为84GPa，密度为3g／cm3．用YG－73型压磁应力计及KX-81型空芯包体式三轴应力计进行了地应力测量，通过对两种不同方法测量结果的分析比较，论证了测试部位地应力量级为几个兆帕，方向总体为N60°E，及地应力的分布规律，指出所测地应力场的方向与本区域的构造轨迹十分吻合；采用两种应力计测量结果基本是一样的，表明本次测量结果的可靠性高．

The Zhanghewan Pumped Storage Power Station is lcoated at Gantao River, upstream near Shijiazhuang City in the Hebei Province. There are two reservoir (up and down).The underground power house and most parts of waterway system are all in the metarnorphosedandesite. In the andesite, compressive strength is 208. 1 MPa averagely, static modules of elastic-ity is 84 GPa averagely, density is 3 g/cm3. The geostatic stress was tested with YG-73 pressmagnetometer and KX-81. By using two different testing method, the results indicated that geo-static stress is not more than 10 MPa, general direction is N60°E, and the distribution of the geo-static stress. The results tested with two different equipments are almost same. lt also indicatethat the results are very reliable.