摘要
渗流场与应力场耦合作用下边坡渗流规律对研究边坡稳定性至关重要,应用基于等效连续介质模型和Louis经验公式建立的各向异性岩体渗流应力耦合模型,对顺倾向层状边坡的各向异性渗流规律进行了模拟分析。研究表明:顺倾向层状边坡中水位降深随结构面倾角θ的增大先升高、后降低,呈现两头低、中间高的形态,且越靠近溢出点,结构面倾角对水位降深影响越大;θ约为42°时水位降深最大,潜水面最低,同时渗透各向异性系数达到最大值;顺倾向边坡岩层产状一定时,随着埋深的增加,岩体渗透各向异性系数逐渐减小,裂隙控渗特征由显著到逐渐变弱,表现出向各向同性渗流过渡的趋势。
Slope seepage law with interaction of seepage and stress is very important for slope stability analysis. The anisotropic seepage-stress coupled model established based on the equivalent continuum model and Louis empirical formula is applied to the numerical simulation of seepage in dip layered rock slope. The numerical simulation results show that for the dip layered rock slope, the value of drawdown first increases then decreases with the dip angle of structural plane θ. The outline is like a shoulder, low on both sides and high in the middle. In addition, the closer to the spill points of water is, the greater the influence on the drawdown value of structural plane dip angle;When θ is about 42°, the drawdown reaches its maximum, meanwhile, the anisotropic ratio of permeability also reaches its maximum. When the attitude of strata of dip layered rock slope is given, the anisotropic ratio of permeability decreases with the increase of the buried depth, and the seepage field controlled by the layered structural planes becomes weak gradually, showing a trend of transition to isotropic seepage.
作者
师文豪
杨天鸿
Shi Wenhao;Yang Tianhong(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China;School of Resources and Civil Engineering,Northeastern University,Shenyang110819,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2021年第6期1783-1788,共6页
Journal of Jilin University：Earth Science Edition
基金
国家重点研发计划项目(2016YFC0801602)
江苏省自然科学基金项目(BK20200993)。
关键词
层状边坡
渗透各向异性系数
渗流
渗流应力耦合
数值模拟
layered slope
anisotropic ratio of permeability
seepage
coupled seepage and stress
numerical simulation
