本文選題：填方邊坡 + 降雨入滲�。� 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：對西南山區(qū)城市,城市化進(jìn)程的不斷推進(jìn)與工程用地的矛盾日益突出,而高填方工程成為解決建設(shè)用地的有效途徑之一。在填方工程的穩(wěn)定性影響因素中,降雨入滲對坡體滲流場分布有著重大影響,無疑是高填方工程失穩(wěn)的主要誘發(fā)因素。本文基于飽和-非飽和滲流理論和邊坡穩(wěn)定性分析方法,結(jié)合重慶魚洞某填方邊坡,通過對研究區(qū)域(對稱)進(jìn)行二維簡化,利用有限元軟件分析降雨條件下邊坡的滲流特性、變形情況及其穩(wěn)定性。并結(jié)合實(shí)測數(shù)據(jù)對沉降作了預(yù)測評估,結(jié)合雨水入滲深度及坡底飽和區(qū)面積對雨后坡體安全系數(shù)進(jìn)行回歸分析。其內(nèi)容主要包括:①運(yùn)用SEEP/W有限元軟件對降雨作用下的高填方邊坡的降雨入滲過程及滲流場變化進(jìn)行分析,包括暫態(tài)飽和區(qū)的發(fā)展過程、孔隙水壓力及體積含水率的變化規(guī)律、不同降雨類型的滲流場分布討論。②運(yùn)用非飽和土邊坡穩(wěn)定性分析理論,結(jié)合降雨過程的孔隙水壓力分布情況對該填方邊坡的雨后變形及穩(wěn)定性情況進(jìn)行討論;同時結(jié)合穩(wěn)定性影響因子進(jìn)行敏感性比較,為同類高填方工程設(shè)計(jì)施工提供參考;③結(jié)合對該填方邊坡的實(shí)測沉降數(shù)據(jù)建立回歸方程預(yù)測邊坡后期沉降;同時根據(jù)降雨入滲深度及坡底飽和區(qū)的面積,建立雨后安全系數(shù)回歸方程。
[Abstract]:For the mountainous cities in southwest China, the contradiction between urbanization and engineering land is becoming more and more serious, and high fill project is one of the effective ways to solve the problem of construction land. Among the factors affecting the stability of fill engineering, rainfall infiltration has a great influence on the distribution of seepage field in slope, which is undoubtedly the main inducing factor of instability in high fill engineering. Based on saturated-unsaturated seepage theory and slope stability analysis method, combined with a filling slope of Chongqing Yudong, the seepage characteristics of slope under rainfall condition are analyzed by using finite element software through two-dimensional simplification of the study area (symmetry). Deformation and its stability. Combined with the measured data, the settlement was forecasted and evaluated. Combined with the depth of Rain Water infiltration and the area of the saturated area at the bottom of the slope, the safety factor of the slope after rain was analyzed by regression analysis. The main contents include the analysis of rainfall infiltration process and seepage field change of high fill slope under rainfall by using SEEPP / W finite element software, including the development process of transient saturated area, the variation law of pore water pressure and volume water content. The distribution of seepage field of different rainfall types is discussed by using the theory of stability analysis of unsaturated soil slope, combining with the distribution of pore water pressure during rainfall, the deformation and stability of the fill slope after rain are discussed. At the same time, the sensitivity is compared with the influence factors of stability, which provides a reference for the design and construction of similar high fill projects. Combined with the measured settlement data of the fill slope, the regression equation is established to predict the late settlement of the slope. At the same time, according to the depth of rainfall infiltration and the area of saturated area of slope bottom, the regression equation of safety factor after rain is established.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU43

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本文編號：1983590