Research on Rheological Properties of Rockfill Material under Stress Unloading

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Li, Jie^1 ; Jin, Zhuan^1

Dianchi College, Yunnan University, Kunming

650100, China^1

关键词: Additional hardening;    Deformation control;    High earth-rock dams;    Rheological behaviors;    Rheological property;    Rock fill materials;    Unloading process;    Water conservancy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022036/pdf
DOI  :  10.1088/1755-1315/300/2/022036

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A number of super high earth-rock dams will be built in China in the near future. Deformation control is the key issue in the safety construction and operation of these major water conservancy projects.In this paper, the effect of stress loading process on the subsequent rheological development is studied, and a new accumulation rule of rockfill rheology is proposed, that is, the current rheological variable of rockfill unit at a certain time is equal to the hardening rheological variable that can cause additional hardening of rockfill at that time.Then, the influence of stress unloading process on the subsequent rheological development law is further studied. It is found that after stress unloading, there are positive rheological zone, no rheological zone and reverse rheological zone in the rheological behavior of rockfill material. The rheological accumulation rule proposed in this paper is also applicable to the case of stress unloading.