水利科技与经济
水利科技與經濟
수리과기여경제
2014年
10期
43-46
,共4页
各向异性%饱和-非饱和%渗流分析%稳定性分析
各嚮異性%飽和-非飽和%滲流分析%穩定性分析
각향이성%포화-비포화%삼류분석%은정성분석
permeability anisotropy%saturated-unsaturated%seepage analysis%stability analysis
基于饱和-非饱和理论,以均质土石坝为例,采用固定网格法,运用ABAQUS有限元软件分析了渗透特性各向异性情况下的浸润线、流速分布,将流场作为初始应力导入到坝坡的稳定性计算中,基本解决了坝坡渗流与稳定性分析耦合问题。计算结果表明,坝坡浸润线、下游溢出点随着各向异性的增大而抬升;坝坡安全系数随着各向异性程度的增大而减小,论证了考虑各向异性渗流特性的必要性。
基于飽和-非飽和理論,以均質土石壩為例,採用固定網格法,運用ABAQUS有限元軟件分析瞭滲透特性各嚮異性情況下的浸潤線、流速分佈,將流場作為初始應力導入到壩坡的穩定性計算中,基本解決瞭壩坡滲流與穩定性分析耦閤問題。計算結果錶明,壩坡浸潤線、下遊溢齣點隨著各嚮異性的增大而抬升;壩坡安全繫數隨著各嚮異性程度的增大而減小,論證瞭攷慮各嚮異性滲流特性的必要性。
기우포화-비포화이론,이균질토석패위례,채용고정망격법,운용ABAQUS유한원연건분석료삼투특성각향이성정황하적침윤선、류속분포,장류장작위초시응력도입도패파적은정성계산중,기본해결료패파삼류여은정성분석우합문제。계산결과표명,패파침윤선、하유일출점수착각향이성적증대이태승;패파안전계수수착각향이성정도적증대이감소,론증료고필각향이성삼류특성적필요성。
Based on saturated -unsaturated theory , using the fixed mesh finite element method , the saturation line and the velocity distribution of a homogeneous earth dam are studied , by the finite ele-ment software ABAQUS.The problem of coupling seepage with stability of dam is solved basically , by calculated the flow field as the initial condition.The results shows that the saturation line is in-creasing with the increasing of permeability anisotropy coefficient , so do the downstream overflow point.The safety coefficient of dam decreases with the increase of the permeability anisotropy coeffi-cient.It is necessary to consideration of the permeability anisotropy in seepage analysis.