發(fā)布時(shí)間：2019-01-23 11:55

【摘要】：隨著我國經(jīng)濟(jì)的快速增長,高速公路的建設(shè)也不斷擴(kuò)大。由于工程地質(zhì)條件的復(fù)雜性,特別是山區(qū)高速公路病害的產(chǎn)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(yīng)用很廣泛。目前,鋼花管注漿加固的理論研究遠(yuǎn)落后于實(shí)踐,其工作機(jī)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(shù)得到更好的推廣和應(yīng)用,對(duì)其承載特性及加固機(jī)理進(jìn)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(shí)體試驗(yàn)工程為研究對(duì)象,在分析填方路基病害產(chǎn)生原因的基礎(chǔ)上,對(duì)鋼花管注漿性狀進(jìn)行研究,提出合理的病害處理對(duì)策與方法。然后根據(jù)鋼花管注漿加固的特點(diǎn),分別進(jìn)行了水平鋼花管注漿和垂直鋼花管注漿的設(shè)計(jì)計(jì)算。再通過實(shí)體試驗(yàn)工程,從理論和工程實(shí)踐上探討處理方法的設(shè)計(jì)、施工工藝參數(shù)。本文通過有限差分軟件FLAC3D建立地質(zhì)模型與鋼花管注漿模型,對(duì)路基的應(yīng)力變形規(guī)律和沉降變形規(guī)律進(jìn)行分析和研究,計(jì)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(yīng)力應(yīng)變規(guī)律。模擬結(jié)果與實(shí)際觀測的數(shù)據(jù)基本一致,從側(cè)面證明了模擬結(jié)果的準(zhǔn)確性。同時(shí)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(jié)果表明鋼花管注漿加固使路堤修筑層物理力學(xué)性質(zhì)有明顯提高,提高了路堤承載力,達(dá)到了治理路基病害的效果,保證公路的安全運(yùn)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(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U418.5

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本文編號(hào)：2413743