本文選題：長期滲水滑坡 + 滑坡穩(wěn)定性　； 參考：《西安科技大學》2017年碩士論文

【摘要】：滑坡已成為地質災害中最為嚴重、影響范圍最大、人員傷亡最多的災害。我國地形地質復雜,是世界上滑坡災害比較嚴重的國家之一。以陜西省寶雞市麟游縣崔木煤礦工業(yè)廣場滑坡為研究對象,通過對其地質條件、滑坡基本特征及變形機制、長期滲水作用機理等較為全面的系統(tǒng)探索,取得的主要成果包括:(1)崔木煤礦工業(yè)廣場滑坡屬深層、復合型、特大型滑坡。該滑坡可分為古滑坡、次級滑坡和新滑坡。古滑坡受特殊的地層條件形成;新滑坡為地表水長期下滲引起地下水位上升,從而誘發(fā)的古滑坡局部復活;次級滑坡主要受新滑坡的牽引作用形成。(2)建立水文地質模型,利用GEO Studio軟件中的seep/w模塊,進行了非飽和瞬態(tài)滲流數(shù)值模擬長期滲水誘發(fā)滑坡形成過程,得出不同時期坡體孔隙水壓力云圖。(3)基于非飽和抗剪強度的極限平衡法,考慮地下水位線變化與滑坡土體內基質吸力分布狀態(tài)的關系,采用Morgenstern-Price法對滑坡地質模型進行了穩(wěn)定性分析。穩(wěn)定分析結果表明該類滑坡存在“穩(wěn)定性突降期”,在此期間,坡體穩(wěn)定性較之整個滑坡形成期降幅最快。(4)針對該類滑坡滑動面埋深較大,提出兩套地下排水措施,即“井點抽水”和“排水盲洞”,利用數(shù)值模擬的方法,驗證排水措施的有效性。研究結果表明,“井點抽水”和“排水盲洞”方案均能快速降低坡體內地下水位,能大幅降低孔隙水壓力,以滲流模擬結果計算滑坡體穩(wěn)定性,驗證了兩套地下排水措施的實效性。
[Abstract]:Landslide has become the most serious geological disaster, the largest impact range, the most casualties of disasters. China is one of the countries with serious landslide disasters because of its complicated topography and geology. Taking the Cuimu Coal Mine Industrial Square landslide in Linyou County, Baoji City, Shaanxi Province as the research object, this paper makes a comprehensive and systematic exploration on the geological conditions, the basic characteristics and deformation mechanism of the landslide, the mechanism of long-term seepage, and so on. The main results obtained include: 1) Cuimu Coal Mine Industrial Square landslide is deep, complex and super large landslide. The landslide can be divided into ancient landslides, secondary landslides and new landslides. The ancient landslide is formed by special formation conditions; the new landslide is caused by the underground water level rising due to the long-term infiltration of surface water, thus inducing the local revival of the ancient landslide; the secondary landslide is mainly towed by the new landslide to form a hydrogeological model. Using the seep/w module of GEO Studio software, the numerical simulation of the formation process of landslide induced by long term seepage with unsaturated transient seepage is carried out, and the pore water pressure cloud map of slope body in different periods is obtained, which is based on the limit equilibrium method of unsaturated shear strength. Considering the relationship between the variation of underground water level and the distribution of matrix suction in landslide soil, the stability of landslide geological model is analyzed by Morgenstern-Price method. The results of stability analysis show that there is a "period of sudden fall of stability" in this kind of landslide. During this period, the stability of slope body is decreased more rapidly than that of the whole landslide. (4) two sets of underground drainage measures are put forward in view of the large buried depth of sliding surface of this kind of landslide. Namely "well point pumping" and "drainage blind hole", using numerical simulation method to verify the effectiveness of drainage measures. The results show that both the "well point pumping" and "drainage blind hole" schemes can rapidly reduce the groundwater level in the slope and greatly reduce the pore water pressure. The stability of the landslide body is calculated by the seepage simulation results. The effectiveness of two sets of underground drainage measures is verified.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD74;P642.22

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