基于变形规律的堆石料弹、塑性湿化力学参数研究  

Elastic and plastic wetting mechanical parameters of rockfill based on deformation law

作　　者：周雄雄 黄佳铄 范志东 纪天瑞 迟世春[4] ZHOU Xiongxiong;HUANG jiashuo;FAN Zhidong;JI Tianrui;CHI Shichun(Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education,Northwest A&F University,Yangling 712100,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China;Shaanxi Province Institute of Water Resources and Electric Power Investigation and Design,Xi'an 712100,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]西北农林科技大学旱区农业水土工程教育部重点实验室,陕西咸阳712100 [2]西北农林科技大学水利与建筑工程学院,陕西咸阳712100 [3]陕西省水利电力勘测设计研究院,陕西西安712100 [4]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《岩土工程学报》2025年第5期1082-1088,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金青年项目(52209168);陕西省博士后科研项目(2023BSHGZZHQYXMZZ14);中央高校基本科研业务费(2452020207)。

摘　　要：湿化变形是土石坝的主要后期变形之一,对坝体的应力变形性状及初次蓄水坝体安全具有重要影响。基于前期湿化变形特性研究成果和提出的湿化变形模型,在进一步全面分析大量湿化试验成果的基础上,总结并完善了湿化应变间的相互关系及变化规律,推导了代表此特性的弹性和塑性力学参数。在非线性弹性理论框架下,提出了新的湿化泊松比计算公式,确立了湿化泊松比、平均有效应力p和广义剪应力q三者之间的密切关系;在塑性理论框架下,提出了精确的湿化剪胀方程。通过多组试验数据论证,发现提出的湿化泊松比与剪胀比的计算结果与试验数据的相关系数均在0.95以上。因此,提出的湿化泊松比和湿化剪胀比的计算方法是普遍适用且精确可靠的,研究成果可为堆石料湿化变形特性和堆石坝湿化变形弹塑性模拟等方面的研究提供重要的参考和支撑。Wetting deformation is part of the main post-completion deformation of earth-rock dams,which has important influences on the stress deformation behavior of dam body and the safety of dam body for the initial impoundment.Based on the previous research results of wetting deformation characteristics,the proposed wetting deformation model and further comprehensive analysis of a large number of wetting test results,the relationship between wetting strains and their variation rules are summarized and improved,and the elastic and plastic mechanical parameters representing this characteristic are deduced.Under the framework of the nonlinear elasticity theory,a new formula for calculating the Poisson's ratio of wetting is proposed,and the close relationship among the wetting Poisson's ratio,the average effective stress p and the generalized shear stress q is established.In the framework of the plasticity theory,an accurate wetting dilatancy equation is proposed.It is found that the correlation coefficient between the calculated results of the Poisson's ratio and the dilatancy ratio proposed in this study and the test data is above 0.95.Therefore,the proposed methods for the wetting Poisson's ratio and the wetting dilatancy ratio are generally applicable,accurate and reliable,and the research results can provide important reference and support for the study of the wetting deformation characteristics of rockfill and the elastic or plastic simulation of the wetting deformation of rockfill dams.

关 键 词：堆石料 湿化变形 湿化泊松比 剪胀方程 湿化剪胀比 

分 类 号：TV641[水利工程—水利水电工程]