基于邓肯-张模型的土工膜心墙堆石坝应力应变分析  

Stress⁃strain Analysis of Geomembrane Core Rockfill Dam Based on Duncan⁃Chang Model

作　　者：刘松成 王可[2] 熊将[2] 胡索奥 王涛[1] LIU Song-cheng;WANG Ke;XIONG Jiang;HU Suo-ao;WANG Tao(State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,Hubei Province,China;PowerChina Beijing Engineering Corporation Limited,Beijing 100024,China)

机构地区：[1]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072 [2]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《中国农村水利水电》2025年第1期215-220,226,共7页China Rural Water and Hydropower

基　　金：中国电力建设股份有限公司重点科技项目(DJ-ZDXM-2023-03)。

摘　　要：研究利用FLAC3D软件提供的二次开发平台,在VC++环境下开发了邓肯-张本构模型,并通过数值模拟三轴压缩试验验证了开发模型的准确性。在此基础上建立了某土工膜心墙堆石坝(最大坝高78 m)的三维数值计算模型,并分析了竣工期和蓄水期两种工况下的应力应变规律。研究结果表明,心墙底部与混凝土基座连接处存在应力集中现象,心墙中应力分布出现明显的拱效应,采用有效应力法判断心墙尚未达到水力劈裂发生的条件,表明心墙堆石坝在目前的工况下是稳定的。This study utilizes the secondary development platform in the VC++environment of FLAC3D software to enhance the Duncan-Zhang model and validate its accuracy through numerical simulations of triaxial compression tests.Building upon this,a three-dimensional numerical model of a geomembrane-core rockfill dam(with a maximum height of 78 m)is established to analyze stress-strain behaviors during construction and reservoir stages.Results indicate that there exists stress concentration at the joint between the core wall base and the concrete foundation,and the stress distribution in the core wall shows an obvious arch effect.Applying the effective stress method confirms that the core wall is below hydraulic fracturing conditions,affirming the stability of the dam under current operational conditions.

关 键 词：邓肯-张模型 堆石坝 土工膜 应力应变 FLAC3D 

分 类 号：TV641.41[水利工程—水利水电工程]