本文關(guān)鍵詞：粉煤灰路堤在貴州山區(qū)軟土地基上的應(yīng)用　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 粉煤灰 粉煤灰路堤 軟土路基 有限元分析 經(jīng)濟效益

【摘要】：隨著貴州省火電工業(yè)的迅速發(fā)展,大量燃煤電廠投產(chǎn)使用,貴州已成為我國電力資源輸出的重點省份。然而粉煤灰排量也同步增長,只有很小部分被回收利用,大部分粉煤灰被閑置,造成嚴重的環(huán)境污染及土地資源浪費,并將制約貴州省電力工業(yè)發(fā)展,如何大量利用粉煤灰的是急需解決的問題,而將粉煤灰大量有效用于公路建設(shè)是解決難題的重要途徑之一。 本文首先對貴州省各主要火力發(fā)電廠及其粉煤灰的排放量和利用量進行了實地調(diào)查,概括了貴州省粉煤灰的主要分布情況,并根據(jù)該分布情況和貴州省高速公路網(wǎng)規(guī)劃選取了五個具有代表性的電廠排放的粉煤灰,進行粉煤灰的物理性能、化學指標、力學特性和工程特性的研究,得到了粉煤灰的基本性能參數(shù),結(jié)合規(guī)范評價了貴州高速公路沿線粉煤灰作為工程結(jié)構(gòu)物原材料的適用性。 依據(jù)杭瑞高速公路貴州境遵義至畢節(jié)段軟基處理說明,分析貴州山區(qū)地形地貌特征及其軟土地基的特點,進行試驗研究得出該路段軟基的重度、飽和重度、粘聚力等有關(guān)參數(shù),為理論計算提供可靠的參數(shù)。簡要分析貴州省高速公路軟土地基處理的主要方法及技術(shù)特點,為提出新的軟基路段道路修筑方法做準備。 分析路堤的破壞形式,弄清粉煤灰路堤的主要破壞類型,作為路堤穩(wěn)定性分析的依據(jù),用有限元軟件PLAXIS,模擬軟土地基上的粉煤灰路堤。結(jié)合貴州山區(qū)軟土地基的特點,針對某一厚度的軟土層上不同斷面路堤進行穩(wěn)定性、應(yīng)力及變形計算,對不同路堤高度及坡度的計算結(jié)果比較分析,根據(jù)粉煤灰路堤的變形及受力情況,找到合理的粉煤灰路堤設(shè)計方案,為工程處理找到正確設(shè)計方法和施工步驟。最后通過粉煤灰路堤試驗路總結(jié)了煤灰路堤的施工工藝并進行經(jīng)濟分析,為以后貴州地區(qū)進行這類路基的設(shè)計和施工提供參考。 本文在總結(jié)國內(nèi)外粉煤灰在道路工程中的應(yīng)用途徑和使用狀況的基礎(chǔ)上,結(jié)合貴州省粉煤灰的實際情況和高速公路建設(shè)現(xiàn)狀,研究了粉煤灰筑路的適用性以及經(jīng)濟性。結(jié)果顯示,在貴州省利用粉煤灰筑路切實可行,為貴州省的粉煤灰綜合利用開拓了新途徑,為貴州省的公路建設(shè)開發(fā)了新的筑路材料。
[Abstract]:With the rapid development of thermal power industry in Guizhou Province, a large number of coal-fired power plants have been put into use, Guizhou has become the key province of power resources export in China. Most of the fly ash is idle, resulting in serious environmental pollution and waste of land resources, and will restrict the development of electric power industry in Guizhou Province, how to make full use of fly ash is an urgent problem to be solved. The effective use of fly ash in highway construction is one of the most important ways to solve the problem. In this paper, first of all, the discharge and utilization of fly ash from main thermal power plants in Guizhou province are investigated, and the main distribution of fly ash in Guizhou province is summarized. According to the distribution situation and the highway network planning of Guizhou Province, five representative power plant fly ash emissions were selected to study the physical properties, chemical indexes, mechanical properties and engineering characteristics of fly ash. The basic performance parameters of fly ash are obtained, and the applicability of fly ash along Guizhou expressway as raw material for engineering structures is evaluated. According to the soft foundation treatment of the section from Zunyi to Bijie in Hangzhou and Rui Expressway, the characteristics of terrain and geomorphology in Guizhou mountainous area and the characteristics of soft soil foundation are analyzed. In order to provide reliable parameters for theoretical calculation, this paper briefly analyzes the main methods and technical characteristics of soft soil foundation treatment of expressway in Guizhou Province, and makes preparations for proposing a new road construction method for soft foundation section. The failure form of embankment is analyzed, and the main failure types of flyash embankment are clarified. As the basis of stability analysis of embankment, the finite element software PLAXIS is used. The fly ash embankment on soft soil foundation is simulated. According to the characteristics of soft soil foundation in Guizhou mountainous area, the stability, stress and deformation of different sections of embankment in a certain thickness of soft soil are calculated. According to the deformation and stress of fly ash embankment, the reasonable design scheme of fly ash embankment is found out by comparing and analyzing the calculation results of different embankment height and slope. Find out the correct design method and construction procedure for the project treatment. Finally, summarize the construction technology of the coal ash embankment and carry on the economic analysis through the fly ash embankment test road. It provides a reference for the design and construction of this kind of subgrade in Guizhou area. On the basis of summing up the application and application of fly ash in road engineering at home and abroad, combining with the actual situation of fly ash in Guizhou province and the present situation of highway construction. The applicability and economy of fly ash road construction are studied. The results show that it is feasible to use fly ash in Guizhou province, which opens up a new way for comprehensive utilization of fly ash in Guizhou province. A new road construction material has been developed for the highway construction in Guizhou province.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.1

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