本文關(guān)鍵詞： 土石壩 必要性 滲流分析 壩坡穩(wěn)定 Seep/w Slope/w 安全系數(shù)　出處：《蘭州理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：土石壩滲流與壩坡穩(wěn)定分析是水利工程中長期以來一個(gè)極其重要的研究課題,因土石壩具有就地取材、造價(jià)低、結(jié)構(gòu)簡單、對(duì)自然條件的適應(yīng)性強(qiáng)、抗震性好、工作可靠、工作壽命長以及施工管理簡便等優(yōu)點(diǎn)而被廣泛采用。在它的發(fā)展過程中已經(jīng)積累了大量的分析計(jì)算方法和工程技術(shù)經(jīng)驗(yàn),但是土石壩失事事故頻發(fā),因滲流引起的滑坡、滲透破壞尤為嚴(yán)重,所以合理、正確地大壩滲流分析與壩坡穩(wěn)定分析是保證土石壩安全運(yùn)行的關(guān)鍵。 文中回顧了滲流理論和邊坡理論的發(fā)展過程,從影響滲流和邊坡穩(wěn)定的因素出發(fā),基于滲流和邊坡穩(wěn)定分析的基本理論和基本方法,給出了滲流穩(wěn)定分析的連續(xù)性方程、微分方程以及極限平衡法和有限元法,建立了二維土石壩滲流和邊坡穩(wěn)定分析的數(shù)值模型。 以青海大寺溝水庫大壩作為研究的典型實(shí)例,運(yùn)用Geo-Studio有限元分析軟件中的Seep/w模塊和Slope/w模塊重點(diǎn)分析了在不同水位荷載組合工況下壩體滲流場、浸潤線和逸出點(diǎn)位置,并將此滲流計(jì)算成果直接應(yīng)用到壩坡穩(wěn)定分析中,得出了在四個(gè)不同運(yùn)行條件下的壩坡穩(wěn)定安全值,將其與《碾壓式土石壩設(shè)計(jì)規(guī)范》(SL274-2001)的安全系數(shù)做比較,得出壩坡是否安全。通過計(jì)算得出,大寺溝水庫大壩在正常蓄水位時(shí)的滲流量為0.054m3/d,校核洪水位時(shí)的滲流量為0.0602m3/d,水位降至死水位時(shí)的滲流量為0.0087m3/d。依據(jù)此滲流計(jì)算的結(jié)果,大壩壩坡在正常運(yùn)行情況、非常運(yùn)行工況Ⅰ、非常運(yùn)行工況Ⅱ以及水位降落時(shí)上游壩坡穩(wěn)定的安全系數(shù)分別為1.88、1.50、1.29和1.27,下游壩坡穩(wěn)定的安全系數(shù)分別為1.71、1.67、1.24和1.19,通過將計(jì)算所得數(shù)值與規(guī)范規(guī)定的安全數(shù)值進(jìn)行對(duì)比分析,得出大寺溝水庫大壩滲流場符合一般規(guī)律,壩型設(shè)計(jì)方案較為合理,在滲流場作用下壩坡穩(wěn)定滿足要求,大壩是安全可靠的。
[Abstract]:The dam seepage and slope stability analysis of embankment is water conservancy project has long been a very important research topic, because the earth rock dam with local materials, low cost, simple structure, strong adaptability to natural conditions, good shock resistance, reliable work, long service life and has the advantages of simple construction and pipe etc. and is widely used in. Its development process has accumulated a lot of experience and methods of analysis and calculation of engineering technology, but the accident frequently caused by seepage of earth rock dam, landslide, seepage damage is particularly serious, so reasonable, correctly analyzing dam seepage and slope stability analysis is the key to ensure the safe operation of the dam.
This paper reviews the development process of seepage theory and the theory of slope, starting from the influence of seepage and slope stability factors, analysis of the basic theory of seepage and stability of slope and the basic method based on the continuity equation of seepage stability analysis is given. The differential equation and the limit equilibrium method and finite element method, a numerical model was established to analyze two-dimensional debris dam seepage and slope stability.
In Qinghai province Ditch Reservoir Dam as a typical example of the use of Seep/w module and Slope/w module on Geo-Studio finite element analysis software in the analysis of the water level in different load combination of dam seepage, seepage line and exit point position, and the seepage calculation results directly applied to dam slope stability analysis, the the dam slope stability safety in four different operating conditions, the design specification of earth rockfill dam "rolling type > (SL274-2001) comparing the safety coefficient, the slope of the dam is safe. By calculation, temple Ditch Reservoir Dam in the normal water level when the seepage flow is 0.054m3/d, flow rate of 0.0602m3/d leakage check flood water level, the water level dropped dead water level when the seepage flow is 0.0087m3/d. on the basis of the seepage calculation results of dam slope in normal operating conditions, operating conditions of very, very 2 and operating conditions The safety coefficient of water landing when the upstream dam slope stability were 1.88,1.50,1.29 and 1.27, the downstream dam slope stability safety factor of 1.71,1.67,1.24 and 1.19 respectively, by contrast the numerical calculation of safety regulations and norms of the numerical, the temple groove dam seepage field is consistent with the general rules, dam type design is reasonable, to meet the requirements the stability of dam slope seepage field, the dam is safe and reliable.

【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV641;TV223.4

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本文編號(hào)：1538386