刚性承压板下深部岩体压缩蠕变参数反演

为获得岩体深部的压缩蠕变力学参数，进行了现场刚性承压板中心孔变形试验。推导出了圆形刚性承压板在均布荷载作用下中心孔深部岩体广义Kelvin模型的瞬时弹性变形。基于黏弹性理论，经过拉普拉斯变换和逆变换，进一步得到了黏弹性变形的计算公式。采用了以瞬时弹性模量、黏弹性模量和黏弹性系数为反演值的迭代优化反演法，并将计算公式程序化。该方法应用于一大型水电站坝区边坡工程，有效获得了坝区软弱岩体深部的压缩蠕变力学参数，克服了以往仅以岩体表面位移进行力学参数反演的缺陷。

Inversion of compression creep parameters of deep rock under rigid bearing plate

In order to get the compression creep parameters of deep rock, the center hole deformation test of rigid bearing plate is carried out in site. The generalized Kelvin model’s instantaneous elastic deformation of deep rock under circular rigid bearing plate which bears the uniformly distributed load is deduced. Based on the viscoelastic theory, through Laplace transform and inverse transform, the numerical formula of the viscoelastic deformation is also obtained. Some creep parameters of soft rockmass such as instantaneous elastic modulus, viscoelastic modulus and coefficient have been achieved by way of the optimized inversion method; and the numerical formula is programmed. This method is applied to a slope project in dam zone, the compression creep parameters are obtained appropriately. This method uses the test data completely; and it is much better than the method which uses the surface displacement only.