地质指标分析下的裂隙岩体渗透系数估算模型构建

Construction of Estimation Model of Permeability Coefficient of Fractured Rock Mass Under Geological Index Analysis

岩体渗透系数作为水文地质重要参数,对水文地质评价、工程防渗设计影响较大,需要较为准确地估算数值,从而为工程其他工作的开展提供可靠依据。为了优化渗透系数估算模型,选取充填物FSD、岩石质量RQD、埋深Z因素作为研究指标,提出Z-RQD-FSD估算模型研究。该模型采用幂函数描述方法,创建各个因素之间的关系体系。验证结果显示,与其他模型相比,本模型的渗透系数估算结果与实测结果更为贴近,可以作为施工方案设计参考依据。

As an important parameter of hydrogeology,the permeability coefficient of rock mass has a great impact on hydrogeological evaluation and engineering anti-seepage design.It needs to estimate the value more accurately,so as to provide a reliable basis for the development of other works of the project.In order to optimize the permeability coefficient estimation model,the factors of filling FSD,rock quality RQD and buried depth z are selected as the research indexes,and the z-rqd-fsd estimation model is proposed.The model uses the power function description method to create the relationship system between various factors.The verification results show that compared with other models,the estimated permeability coefficient of this model is closer to the measured results,which can be used as a reference for construction scheme design.