秦山核电站二期工程地基动态参数的测定

DETERMINATION OF DYNAMIC PARAMETERS OF FOUNDATION OF THE SECOND-STAGE PROJECT OF THE QINSHAN NUCLEAR POWER STATION

核电站地基必须经受住特定设计荷载条件下的动力荷载作用,采用动力分析法,为此,需要提供正确的动力参数。动力参数的正确性是以先进的测试技术为前提,以保证测试数据的可靠性,此外,尚需综合考虑各种影响因素,合理取值,本文就秦山核电站二期地基的动态测试中,有关横波的激发与接收,速度弥散,阻尼比的计算等问题进行了探讨。这些问题在各类地基的动态参数测试工作中都是难以遇避的,本文试图通过这些问题的探讨,进一步深化对地基动态参数测试技术的认识,赋予其更完善的理论基础。在这方面起一抛砖引玉的作用。

The foundation of a nuclear power station should withstand the dynamic load under the specially designed load condition, and dynamic analysis is needed. For this purpose, accurate dynamic parameters are to be provided, whose accuracy presupposes the advanced testing techniques which may guarantee the reliability of test data. In addition, various influencing factors should be considered comprchensively in order to choose values reasonably. This paper deals with problems about the excitation and reception of transverse waves, velocity diffusion, and calculation of damping ratio during the dynamic testing of the secondstage foundation of the Qinshan Nuclear Power Station. Through the discussion of these problems which can hardly be evaded in the determination of dynamic parameters of various foundations, this paper attempts to deepen the cognition of testing techniques of dynamic parameters of foundations and to perfect their theoretical basis.