积石峡堆石坝混合料力学特性的模拟方法

A practical method to simulate mechanical characters of excavation materials mixture in Jishixia CFRD

堆石坝工程中经常采用混合后的开挖石料作为筑坝材料,混合料的使用可以在较大程度上节约工程建设的成本,但开挖混合料筑坝可行性和大坝安全性评价也是须要研究的重要问题。本文基于系统的、多种岩性开挖料的室内试验结果,提出了一种确定混合料的沈珠江模型参数的实用方法;并通过与试验结果和试验得到参数的计算结果对比,验证了本文方法的有效性。最后,通过该方法在积石峡面板堆石坝工程中的应用,说明了该方法的作用和对工程设计与评价的指导意义。

The mixture of excavation materials is usually used in rockfill dam.The use of such a mixture greatly reduces the project cost,but it also bring along the issues of design feasibility and dam safety owing to the deformation behavior of the mixture.This paper proposes a practical method to determine the parameters of Shen Zhujiang＇s elastoplastic model of soil and rockfill materials.The method was verified by a large scale triaxial compression test through a comparison with the measured data and with the parameters derived from the data.An analysis of stress and deformation of the Jishixia CFRD demonstrates application of the method and its significance in guiding engineering design.