【摘要】：隨著我國經濟的快速增長,高速公路的建設也不斷擴大。由于工程地質條件的復雜性,特別是山區(qū)高速公路病害的產生往往是不可避免的。在高速公路路基沉降病害治理中,注漿加固應用很廣泛。目前,鋼花管注漿加固的理論研究遠落后于實踐,其工作機理還未完全弄清楚。為了使鋼花管注漿加固處理高速公路沉降病害技術得到更好的推廣和應用,對其承載特性及加固機理進行更深入的研究分析是非常必要的。本論文以石太線路基病害處理(K219~K335)實體試驗工程為研究對象,在分析填方路基病害產生原因的基礎上,對鋼花管注漿性狀進行研究,提出合理的病害處理對策與方法。然后根據鋼花管注漿加固的特點,分別進行了水平鋼花管注漿和垂直鋼花管注漿的設計計算。再通過實體試驗工程,從理論和工程實踐上探討處理方法的設計、施工工藝參數(shù)。本文通過有限差分軟件FLAC3D建立地質模型與鋼花管注漿模型,對路基的應力變形規(guī)律和沉降變形規(guī)律進行分析和研究,計算與分析水平鋼花管注漿與垂直鋼花管注漿的變形沉降特征以及應力應變規(guī)律。模擬結果與實際觀測的數(shù)據基本一致,從側面證明了模擬結果的準確性。同時還通過路堤修筑層注漿滲透過程分析,通過位移矢量圖可明顯看出路堤的破壞趨勢。研究結果表明鋼花管注漿加固使路堤修筑層物理力學性質有明顯提高,提高了路堤承載力,達到了治理路基病害的效果,保證公路的安全運營。
[Abstract]:With the rapid economic growth of our country, the construction of highway is also expanding. Due to the complexity of engineering geological conditions, especially the occurrence of highway diseases in mountainous areas is inevitable. Grouting reinforcement is widely used in the treatment of highway subgrade settlement disease. At present, the theoretical study of steel pipe grouting is far behind practice, and its working mechanism has not been fully understood. In order to popularize and apply the technology of steel-flower pipe grouting to deal with highway subsidence disease, it is necessary to study and analyze its bearing characteristics and reinforcement mechanism. In this paper, based on the analysis of the causes of embankment disease, the grouting behavior of steel flower pipe is studied, and the reasonable treatment measures and methods are put forward based on the research on the solid test project of foundation disease treatment (K219~K335) of Shi-tai railway line. Then, according to the characteristics of steel flower pipe grouting, the design calculation of horizontal steel flower tube grouting and vertical steel flower pipe grouting is carried out. Then the design and construction parameters of the treatment method are discussed in theory and engineering practice through the solid test engineering. In this paper, the geological model and steel pipe grouting model are established by finite difference software FLAC3D, and the stress deformation and settlement deformation of subgrade are analyzed and studied. The deformation settlement characteristics and stress-strain law of horizontal steel pipe grouting and vertical steel pipe grouting are calculated and analyzed. The simulation results are basically consistent with the observed data, and the accuracy of the simulation results is proved from the side. At the same time, through the analysis of grouting infiltration process of embankment construction layer, the damage trend of embankment can be clearly seen by displacement vector diagram. The results show that the physical and mechanical properties of embankment construction layer are obviously improved by grouting with steel flower pipe, the bearing capacity of embankment is improved, the effect of subgrade disease treatment is achieved, and the safe operation of highway is ensured.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U418.5

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