本文選題：巖土工程 + 邊坡�。� 參考：《沈陽(yáng)建筑大學(xué)》2015年碩士論文

【摘要】：地質(zhì)災(zāi)害種類繁多,城市邊坡主要災(zāi)害為整體滑坡破壞,影響邊坡穩(wěn)定的因素也多種多樣,降雨是誘導(dǎo)滑坡的主要因素。當(dāng)進(jìn)行邊坡降雨入滲及穩(wěn)定性分析時(shí),為了方便計(jì)算通常將自然界三維狀態(tài)的邊坡簡(jiǎn)化為二維處理,忽略三維效應(yīng)對(duì)降雨邊坡的影響,這顯然這并不能比較全面地反映降雨入滲過(guò)程及降雨對(duì)邊坡穩(wěn)定性的影響。對(duì)于三維邊坡,一方面邊坡形狀會(huì)影響地表徑流的深度和流態(tài),進(jìn)而影響降雨入滲過(guò)程和土坡穩(wěn)定；另一方面,雖然一般認(rèn)為工程上采用的二維分析方法得出的計(jì)算結(jié)果是偏于安全的,但在有些情況下,邊坡體的三維邊界效應(yīng)是不能忽略的,否則會(huì)造成工程建設(shè)的浪費(fèi)或?qū)聶C(jī)制的誤判。本文通過(guò)對(duì)大型有限元軟件ABAQUS的二次開發(fā),建立了合理的三維邊坡降雨入滲模型,在考慮地表徑流與地下流共同作用的基礎(chǔ)上進(jìn)行了流固耦合計(jì)算。著重從土體的性質(zhì)、邊坡的邊界條件、降雨的強(qiáng)度、三維邊坡的幾何形狀四個(gè)角度出發(fā),深入而系統(tǒng)地探討了降雨條件下邊坡的降雨入滲情況及其穩(wěn)定性。通過(guò)對(duì)比三維模型與相同條件下的二維模型計(jì)算結(jié)果,分析了三維效應(yīng)對(duì)降雨入滲及邊坡穩(wěn)定性的影響。
[Abstract]:There are many kinds of geological disasters, the main disasters of urban slope are the whole landslide damage, and the factors affecting slope stability are also various. Rainfall is the main factor to induce landslide. When slope rainfall infiltration and stability analysis are carried out, in order to facilitate calculation, the slope with 3D state in nature is usually simplified to two dimensional treatment, and the effect of 3D effect on rainfall slope is ignored. This obviously does not reflect the rainfall infiltration process and the influence of rainfall on slope stability. For three-dimensional slope, on the one hand, the shape of slope will affect the depth and flow state of surface runoff, and then affect the process of rainfall infiltration and the stability of soil slope; on the other hand, Although it is generally considered that the results obtained by the two-dimensional analysis method used in engineering are relatively safe, in some cases, the three-dimensional boundary effect of the slope can not be ignored. Otherwise, it will cause waste of engineering construction or misjudgment of landslide mechanism. Through the secondary development of the large-scale finite element software ABAQUS, a reasonable three-dimensional slope rainfall infiltration model is established, and the fluid-solid coupling calculation is carried out on the basis of considering the interaction between surface runoff and subsurface flow. From the aspects of soil property, slope boundary condition, rainfall intensity and geometric shape of 3D slope, the rainfall infiltration situation and stability of slope under rainfall condition are discussed deeply and systematically. The effect of 3D effect on rainfall infiltration and slope stability is analyzed by comparing the results of 3D model and 2D model under the same conditions.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P642.22

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