本文選題：高填方邊坡 + 紅黏土地基�。� 參考：《中國礦業(yè)大學》2017年碩士論文

【摘要】：隨著我國西南地區(qū)基礎設施建設的快速發(fā)展,機場、公路、鐵路等項目的建設帶來的高填方邊坡日益增多,加上西南地區(qū)地質條件極為復雜,因此對高填方邊坡變形和穩(wěn)定性的研究變得至關重要,不僅關系到工程建設能否順利完成,而且直接影響建設場地日后的正常使用。西南地區(qū)廣泛分布紅黏土,紅黏土作為一種特殊性地基土,對上覆填方邊坡的變形和穩(wěn)定性有重要影響,因此對于紅黏土作為邊坡基底的研究也顯得至關重要。本文以云南安寧地付罐區(qū)高填方邊坡為研究對象,綜合多種方法研究該紅黏土基底高填方邊坡的變形和穩(wěn)定性,對同類型的工程有一定的指導意義。論文主要工作內容如下:(1)根據(jù)收集的勘察、設計和施工資料,掌握并概述研究區(qū)的地形地貌、地質構造、地層結構、水文地質等,同時也分析了施工技術參數(shù)和變形特征。(2)根據(jù)收集的勘察資料,概述了研究區(qū)巖土體的結構特性及其物理力學性質。通過分析三個階段的室內土工試驗數(shù)據(jù),結合原位測試手段,研究分析了填方施工前后,下覆軟弱土層紅黏土的物理力學性質的變化,同時通過surfer軟件依據(jù)收集的鉆孔資料分析得到了填土和紅黏土的分布特征。(3)利用GEO-SLOPE軟件SIGMA模塊和有限差分軟件FLAC3D分別從二維和三維對填方邊坡的施工過程進行模擬計算,分析填方邊坡的位移變化和拉應力分布。然后根據(jù)數(shù)值模擬結果,分析地付罐區(qū)裂縫產生的原因,及其與基底紅黏土的相關性。(4)根據(jù)工后坡體地表監(jiān)測數(shù)據(jù),結合類似工程變形,分析和預測坡體的變形趨勢,并且通過兩者來對比數(shù)值模擬的結果,從而驗證數(shù)值模擬的有效性。(5)利用SLIDE軟件基于簡化BISHOP法對四個典型剖面進行一般工況和地震工況的穩(wěn)定性計算,同時為了分析裂縫形成原因及對罐區(qū)東側整個坡體的穩(wěn)定性的影響,假定滑動面后緣位置為裂縫區(qū)域,再次利用SLIDE軟件進行穩(wěn)定性計算。然后利用FLAC3D軟件基于強度折減法對邊坡進行折減計算,得到相應的安全系數(shù),并與SLIDE軟件計算結果比較。最后采用《公路工程抗震規(guī)范》中的計算公式驗證SLIDE軟件計算的地震工況下最危險剖面的穩(wěn)定性。(6)結合多種方法對高填方邊坡的分析計算結果,綜合評估填方邊坡的穩(wěn)定性。同時根據(jù)之前的工作,研究分析紅黏土基底對整個填方邊坡變形及穩(wěn)定性的影響,以及與坡體裂縫產生的關系。
[Abstract]:With the rapid development of infrastructure construction in southwest China, the construction of airports, highways, railways and other projects has resulted in an increasing number of high fill slopes, and the geological conditions in southwest China are extremely complex. Therefore, the study of deformation and stability of high fill slope becomes very important, which not only relates to the successful completion of engineering construction, but also directly affects the normal use of construction site in the future. Red clay is widely distributed in southwest China. As a special foundation soil, red clay has an important effect on the deformation and stability of overlying fill slope, so it is very important to study red clay as the base of slope. In this paper, the deformation and stability of the high fill slope of the red clay foundation are studied by taking the high fill slope of Anning Tiefu area in Yunnan Province as the research object, which has certain guiding significance for the same type of project. The main work of the paper is as follows: (1) based on the collected survey, design and construction data, the topographical features, geological structure, stratigraphic structure, hydrogeology and so on of the study area are mastered and summarized. At the same time, the construction technical parameters and deformation characteristics are analyzed. (2) based on the survey data collected, the structural characteristics and physical and mechanical properties of rock and soil in the study area are summarized. The physical and mechanical properties of red clay overlying soft soil layer before and after filling construction were studied and analyzed by analyzing the data of three stages of indoor geotechnical test and in situ testing. At the same time, based on the analysis of borehole data collected by surfer software, the distribution characteristics of fill and red clay are obtained. The construction process of filling slope is simulated by GEO-SLOPE software SIGMA module and finite difference software FLAC3D from 2D and 3D, respectively. The displacement variation and tensile stress distribution of fill slope are analyzed. Then, according to the results of numerical simulation, the causes of cracks and their correlation with red clay are analyzed, and the deformation trend of slope is analyzed and forecasted according to the surface monitoring data of post-construction slope and similar engineering deformation. The results of numerical simulation are compared with each other to verify the validity of numerical simulation. (5) using SLIDE software to calculate the stability of four typical sections under general and seismic conditions based on simplified BISHOP method. At the same time, in order to analyze the cause of crack formation and the influence on the stability of the whole slope body in the east side of the tank area, it is assumed that the position of the back edge of the sliding surface is the crack area, and the stability calculation is carried out again by using SLIDE software. Then the slope is reduced by FLAC3D software based on the strength reduction method, and the corresponding safety factor is obtained, and the calculated results are compared with those of the SLIDE software. Finally, the stability of the most dangerous section under seismic condition calculated by SLIDE software is verified by the calculation formula in "Code for earthquake Resistance of Highway Engineering". The stability of the slope is evaluated synthetically by combining the results of analysis and calculation of high fill slope with various methods. At the same time, according to the previous work, the influence of red clay base on the deformation and stability of the whole fill slope and the relationship between the red clay base and the cracks in the slope body are studied and analyzed.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU446

【參考文獻】

相關期刊論文 前10條

1 楊校輝;朱彥鵬;周勇;楊曉宇;師占賓;;山區(qū)機場高填方邊坡滑移過程時空監(jiān)測與穩(wěn)定性分析[J];巖石力學與工程學報;2016年S2期

2 曲泰霖;徐巖;張金力;;高填方路基變形影響因素數(shù)值模擬研究[J];北方交通;2016年04期

3 侯俊偉;唐秋元;李楊秋;馬新巖;;西南某山區(qū)機場高填方邊坡穩(wěn)定性研究[J];重慶交通大學學報(自然科學版);2016年03期

4 李新旺;甘鵬山;李國昌;蔣川;;山區(qū)復雜地形條件下高填方邊坡穩(wěn)定性分析[J];路基工程;2015年05期

5 向章波;張家銘;周曉宇;夏冬生;周治平;;基于Slide的某紅層路塹邊坡穩(wěn)定性分析[J];水文地質工程地質;2015年04期

6 田繼雪;魏迎奇;蔡紅;李維朝;曲偉;劉盈斐;;極端降雨條件下高填方工程的穩(wěn)定性研究[J];水利學報;2014年S2期

7 許文學;羊遠新;李鋒;錢清玉;薛宗建;申瑾;趙偉冬;;高填方機場邊坡變形監(jiān)測新方法[J];測繪工程;2014年11期

8 翁鑫榮;;軟土地區(qū)某堆山工程的有限元數(shù)值模擬分析[J];地下空間與工程學報;2014年S2期

9 陳國慶;黃潤秋;石豫川;許強;;基于動態(tài)和整體強度折減法的邊坡穩(wěn)定性分析[J];巖石力學與工程學報;2014年02期

10 盧坤林;朱大勇;;坡面形態(tài)對邊坡穩(wěn)定性影響的理論與試驗研究[J];巖石力學與工程學報;2014年01期

相關碩士學位論文 前4條

1 馬麗慧;遂寧機場高填方邊坡穩(wěn)定性分析[D];成都理工大學;2013年

2 申光凝;強夯黃土填方邊坡的室內模型試驗及數(shù)值模擬研究[D];中北大學;2013年

3 張宏云;模糊數(shù)學在邊坡穩(wěn)定性評價中的應用[D];昆明理工大學;2011年

4 馬可;軟土地基上高填土邊坡穩(wěn)定性研究[D];南京大學;2011年

，

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