本文選題：滑坡 + 滲透壓力　； 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年11期

【摘要】：基于庫區(qū)水位漲落或暴雨入滲,經(jīng)過演變易造成滑坡,研究滲透壓作用下裂隙損傷效應(yīng)對(duì)滲透張量的影響,通過理論推導(dǎo),提出裂隙巖體滲流場與損傷場耦合的分析模型;以湖北潘口水電站進(jìn)水口邊坡為研究對(duì)象,建立基于連續(xù)介質(zhì)的裂隙巖體流固耦合滲流數(shù)值計(jì)算分析方法。研究結(jié)果表明:邊坡在開挖過程中變形以卸荷回彈變形為主,回彈變形范圍隨開挖逐級(jí)增大,各級(jí)邊坡開挖對(duì)鄰級(jí)邊坡變形的影響最顯著,對(duì)較遠(yuǎn)坡段的影響逐步減弱;邊坡開挖面基本處于小拉應(yīng)力狀態(tài),邊坡淺表層拉應(yīng)力區(qū)分布范圍及量值均很小;邊坡全部開挖完成后,邊坡的塑性區(qū)主要沿近壩的開挖馬道外緣分布,分布范圍小,在表層巖體內(nèi);裂隙巖體流固耦合模型的三維數(shù)值計(jì)算能夠較真實(shí)地模擬邊坡開挖過程位移場、應(yīng)力場、塑性區(qū)、拉應(yīng)力區(qū)的分布規(guī)律。
[Abstract]:Based on the fluctuation of water level in reservoir area or the infiltration of rainstorm, it is easy to cause landslide through evolution. The influence of fracture damage effect on permeable Zhang Liang under osmotic pressure is studied. Through theoretical derivation, an analytical model of coupling seepage field and damage field of fractured rock mass is put forward. Taking the intake slope of Pankou Hydropower Station in Hubei Province as the research object, a numerical calculation and analysis method for fluid-solid coupling seepage of fractured rock mass based on continuous medium is established. The results show that the deformation of slope is mainly unloading and springback deformation, and the range of springback deformation increases with the excavation step by step. The influence of slope excavation on adjacent slope deformation is the most significant, and the influence on the far slope is gradually weakened. The excavating surface of the slope is basically in the state of small tensile stress, the distribution range and quantity of the tensile stress zone of the shallow surface of the slope are very small, and after all the excavation of the slope is completed, the plastic zone of the slope mainly distributes along the outer edge of the excavation track near the dam, and the distribution range is small. The three-dimensional numerical calculation of fluid-solid coupling model of fractured rock mass in the surface rock body can simulate the distribution of displacement field, stress field, plastic zone and tensile stress region in the excavation process of slope.
【作者單位】： 中南大學(xué)地球科學(xué)與信息物理學(xué)院;中國電建集團(tuán)中南勘測(cè)設(shè)計(jì)研究院有限公司地質(zhì)工程處;長沙理工大學(xué)交通運(yùn)輸工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51508042)~~
【分類號(hào)】：TV223

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