本文選題：邊坡 + 降雨入滲��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：邊坡失穩(wěn)引起滑坡是全球性的地質(zhì)災(zāi)害之一，對人類社會和經(jīng)濟建設(shè)構(gòu)成巨大危害，降雨是引起邊坡穩(wěn)定性降低，導(dǎo)致邊坡失穩(wěn)的最主要和最普遍的外界因素，降雨類型的滑坡約占滑坡總數(shù)的70％，而且降雨類型的滑坡中95％的滑坡發(fā)生在雨季�？梢娧芯拷涤耆霛B對邊坡地下水位及土體飽和度的影響，是邊坡穩(wěn)定性研究的重要內(nèi)容。 論文首先介紹了非飽和滲流的基本概念、基本微分方程以及飽和—非飽和滲流的有限元解法。其次，以一個理想土坡模型為對象，研究了降雨量、土體滲透系數(shù)、基質(zhì)吸力、土水特征曲線（滲透系數(shù)與基質(zhì)吸力關(guān)系曲線、體積含水量與基質(zhì)吸力關(guān)系曲線）等參數(shù)對入滲結(jié)果的影響。降雨條件下土體中的浸潤線有單線和雙線兩種形式，浸潤線的形式是土體滲透系數(shù)、降雨量、降雨持時、孔隙比、基質(zhì)吸力以及邊坡幾何尺寸的多元函數(shù)，當降雨量小、滲透系數(shù)大、降雨持時短、基質(zhì)吸力小、邊坡高度低時，浸潤線易呈單線形式，，相反則易呈雙線形式。然后，分析了魯?shù)乩娬究菽続滑坡區(qū)的工程地質(zhì)條件、滑坡的形態(tài)及規(guī)模、滑坡的邊界特征、滑坡的結(jié)構(gòu)特征、滑坡的變形破壞特征及形成機制。在此基礎(chǔ)上，以滑坡體中的天然穩(wěn)定水位線為判據(jù)，以設(shè)計基礎(chǔ)參數(shù)為初值，反演分析了枯木A滑坡堆積體非飽和土力學(xué)參數(shù)，包括基質(zhì)吸力與飽和度的關(guān)系，飽和度與相對滲透系數(shù)的關(guān)系；以反演參數(shù)為依據(jù)，研究了滑坡體原始地下水位線分布；研究了天然河水位和正常蓄水位在無、有滲控措施（排水洞+上仰排水孔）條件下，滑坡體內(nèi)地下水位線、非飽和區(qū)含水量、孔隙水壓力等的變化規(guī)律，指出該邊坡處于欠穩(wěn)定狀態(tài)，必須進行工程治理；排水洞+上仰排水孔工程治理措施是有效的，對于飽和度和含水量雖有很大減小，但對于降低非飽和區(qū)的飽和度和含水量效果有限。
[Abstract]:Slope instability caused by landslide is one of the global geological disasters, which constitutes a great harm to human society and economic construction. Rainfall is the most important and universal external factor causing slope stability reduction and slope instability. The rainfall type landslides account for about 70% of the total number of landslides, and 95% of the landslides in the rainfall type landslides. In the rainy season, we can see that the influence of rainfall infiltration on groundwater level and soil saturation is an important part of slope stability research.
The basic concept of unsaturated seepage, basic differential equation and finite element method for saturated unsaturated seepage are introduced. Secondly, the rainfall, soil permeability coefficient, matrix suction, soil water characteristic curve (relation curve of permeability coefficient and matrix suction, volume water content and matrix) are studied. The infiltration line in the soil has two forms of single and double lines, and the infiltration line is the coefficient of soil permeability, rainfall, rainfall holding, pore ratio, matrix suction and the geometric dimensions of the slope, when the rainfall is small, the permeability coefficient is large, the rain holding is short, matrix is short. When the suction is small and the height of the slope is low, the infiltration line is easy to form a single line, but on the contrary, it is prone to double line form. Then, the engineering geological conditions, the shape and scale of the landslides, the boundary characteristics of landslides, the structural characteristics of landslides, the characteristics of the landslide and the formation mechanism of the landslide are analyzed. On the basis of this, the landslide body is made. The natural stable water level line is considered as the criterion, and the basic parameters are designed as the initial value. The mechanical parameters of unsaturated soil in the A landslide accumulation body of the dead wood are analyzed, including the relationship between the base suction and saturation, the relation of saturation to the relative permeability coefficient, and the distribution of the original groundwater level line of the landslide body is studied based on the inversion parameters, and the days of the study are studied. However, the water level of the river and the normal water level are not. Under the conditions of seepage control (drainage hole + upside drainage hole), the groundwater level line, water content in unsaturated zone, pore water pressure and so on in the landslide, point out that the slope is in the under stable state and must be treated by engineering, and the treatment measures of drainage hole + upside drainage hole are effective, Although saturation and water content decrease greatly, the effect of reducing saturation and water content in unsaturated zone is limited.

【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV223.4

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