水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2011年
6期
55-58
,共4页
坝坡稳定分析%非稳定渗流%有限元法%极限平衡法
壩坡穩定分析%非穩定滲流%有限元法%極限平衡法
패파은정분석%비은정삼류%유한원법%겁한평형법
slope stability analysis%unsteady seepage%finite element method%limit equilibrium method
库水位下降过快往往引起坝坡上游失稳。为了研究库水位骤降条件下坝体稳定性受非稳定渗流场的影响情况，采用有限元法，考虑非饱和区的影响对坝体非稳定渗流场进行模拟。利用得出的瞬态渗流场分布等结果，运用极限平衡法对坝坡稳定性进行计算分析。结果表明：非稳定渗流场分布影响上游坝坡稳定性；水位下降速度越大，上游坝坡稳定性降低速度越快，降低幅度越大。
庫水位下降過快往往引起壩坡上遊失穩。為瞭研究庫水位驟降條件下壩體穩定性受非穩定滲流場的影響情況，採用有限元法，攷慮非飽和區的影響對壩體非穩定滲流場進行模擬。利用得齣的瞬態滲流場分佈等結果，運用極限平衡法對壩坡穩定性進行計算分析。結果錶明：非穩定滲流場分佈影響上遊壩坡穩定性；水位下降速度越大，上遊壩坡穩定性降低速度越快，降低幅度越大。
고수위하강과쾌왕왕인기패파상유실은。위료연구고수위취강조건하패체은정성수비은정삼류장적영향정황，채용유한원법，고필비포화구적영향대패체비은정삼류장진행모의。이용득출적순태삼류장분포등결과，운용겁한평형법대패파은정성진행계산분석。결과표명：비은정삼류장분포영향상유패파은정성；수위하강속도월대，상유패파은정성강저속도월쾌，강저폭도월대。
The upstream dam slope would be in unstable state due to the water table drawdown. To study the effect of the water table drawdown upon the stability of upstream dam slope, it is necessary to simulate the seepage field and the changes in stability in the case of the water table drawdown. The unstable Seepage field is simulated by using the method of finite element and considering the effect of non-saturated region. The upstream dam slope stability is calculated by us- ing the limit equilibrium method and the results of transient seepage field distribution obtained from simulation and so on. The real example analysis indicates that the upstream dam slop stability is affected by the distribution of the unstable seepage field, and the greater the rate of water table drawdown is, the faster the stability of upstream dam slope decreases and the larger is the extent.
