向家坝水电站地下厂房发电机组地震动参数选择研究

Study on Earthquake Dynamic Parameter Selection of Large Underground Generating Unit of the Xiangjiaba Hydropower Station

大型发电机组如采用大坝的抗震设防标准,将会导致制造成本过高。目前国内尚无针对大型地下厂房水力发电机组的抗震设防规范,因此需要通过论证合理选取地下水力发电机组抗震设防的标准,并据此选取设计地震动参数。根据国内相关抗震规范的原则,研究制定了向家坝水电站地下发电机组抗震设防标准,并在此基础上应用波动分析理论及计算程序,分析论证了向家坝电站地下发电机组埋深、地表地形以及基岩弹性模量对地震动参数选择的影响。

If the seismatic fortification criterion of the large dam were used as the seismatic fortification criterion of large underground generating unit, it would be lead high cost of the generating unit manufacture. The domestic still has no anti- earthquake fortification criterion for large underground generating unit currently, so need argument reasonable to establish earthquake defend standard for large underground of large underground generating unit and to selecting earthquake strong motion parameters according to this standard. This paper drew up design earthquake motion parameters of large underground generating unit of the Xiangjiaba project according to the domestic related aseismatic criterion principle. The effect of underground deep, geography and rock modulus were analyzed for selecting the strong motion parameters of large underground generating unit, by using wave motion analysis theories and calculation procedure.