本文選題：南寧盆地 + 第三系泥巖�。� 參考：《廣西大學(xué)》2016年碩士論文

【摘要】：南寧盆地第三系泥巖廣泛分布,且第三系泥巖具有軟化性、崩解性、膨脹性等特點。由泥巖組成的滑坡遇到降雨極易滑坡,給工程建設(shè)帶來極大的危害。因此研究不同地層組合下南寧盆地滑形成機理對于預(yù)測以及治理第三系泥巖滑坡災(zāi)害有重要意義。本文收集南寧市涉及第三系泥巖滑坡的勘查報告近百份,統(tǒng)計分析其中第三系泥巖的物理力學(xué)參數(shù)以及膨脹性參數(shù),以此作為數(shù)值模擬的參數(shù)。同時根據(jù)勘察報告將南寧盆地涉及第三系泥巖的地層進行分析整理,簡化地層組合模型,并以此為基礎(chǔ)進行有限元數(shù)值模擬。模擬邊坡在降雨后的情景,通過數(shù)值模擬找出不同坡度的邊坡的臨界高度,即邊坡在此高度之下出于穩(wěn)定狀態(tài),而高于此高度則在降雨后極易失穩(wěn)。之后對不同坡度下對應(yīng)的臨界高度進行擬合。得出不同模型下坡度-臨界坡高曲線。論文一方面總結(jié)了南寧盆地第三系泥巖的參數(shù),可以為相關(guān)的工程建設(shè)提供參考。另一方面,論文繪制出不同模型下坡度-臨界坡高曲線,可以為工程實踐提供重要參考。
[Abstract]:Tertiary mudstone is widely distributed in Nanning Basin, and Tertiary mudstone is characterized by softening, disintegrating and swelling. Landslide composed of mudstone is easy to landslide when it comes to rainfall, which brings great harm to engineering construction. Therefore, it is of great significance to study the mechanism of slip formation in Nanning Basin under different stratigraphic assemblages for predicting and controlling the landslide hazard of Tertiary mudstone. In this paper, we collect nearly 100 reports on the exploration of Tertiary mudstone landslides in Nanning, and analyze the physical and mechanical parameters and swelling parameters of Tertiary mudstones, which are taken as the parameters of numerical simulation. At the same time, according to the survey report, the strata involved in Tertiary mudstone in Nanning Basin are analyzed and sorted, and the stratigraphic assemblage model is simplified, and the finite element numerical simulation is carried out on the basis of this model. In order to simulate the slope after rainfall, the critical height of slope with different slope degree is found by numerical simulation, that is, the slope is stable under this height, but the slope above this height is easy to lose stability after rainfall. Then the critical height corresponding to different slopes is fitted. The slope-critical slope height curves under different models are obtained. On the one hand, the paper summarizes the parameters of Tertiary mudstone in Nanning Basin, which can provide reference for related engineering construction. On the other hand, the paper draws the slope-critical slope height curve under different models, which can provide an important reference for engineering practice.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P642.22

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本文編號：1803644