摘要
水利水电工程中坝基、边坡及地下引水隧洞等岩体工程,由于地应力的作用,实际工程岩体往往处于三向不等压应力状态,则三向不等压主应力作用下节理岩体的渗流特性研究对水利水电工程的安全性评价与稳定性分析至关重要。三向主应力作用下单节理面渗流特性是最基本的研究课题,对三向主应力作用下单节理面渗流特性的国内主流研究思路与成果进行了系统的归纳与总结,并讨论了各类渗流与应力耦合关系式的优缺点。分析结果表明既有研究成果差异性较大,尚未形成成熟的理论体系。在吸取有益成果的基础上,给出了一种较合理的三向主应力作用下单节理面内渗流与应力耦合关系式,研究结果可为构建节理岩体渗流与应力耦合分析的理论模型及其他工程岩体渗流分析提供有益研究方向。
Engineering rocks in hydraulic and hydropower projects are always in a tri-axial state of unequal principal stresses due to the effect of geo-stress, such as those in dam foundations, slopes or underground water diversion tunnels. Seepage characteristics of the jointed rock masses under such a state are very important to the safety evaluation and stability analysis of these structures. Research on the corresponding cases of rock mass with a single joint is essential and most basic. This paper summarizes the basic studies on the characteristics of seepage in a single rock joint under tri-axial stress state. We systematically review and analyze previous achievements in this type of seepage calculation and discuss the advantages and disadvantages of each seepage-stress coupling formula. Results show that a great disparity exists in the previous formulae, indicating that up to the present, no mature theoretical system has yet been developed for these flows. A more reasonable seepage-stress coupling formula is suggested for calculating a single rock joint in the condition of tri-axial stress state on the basis of existing formulae. The present study would help analysis on the seepage-stress coupling of jointed rock masses or other engineering rock masses.
出处
《水力发电学报》
EI
CSCD
北大核心
2017年第11期111-120,共10页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(51579081
51379065)
关键词
节理岩体
渗流
单节理
主应力
渗流与应力耦合
jointed rock mass
seepage
single joint
principal stress
coupled seepage and stress
