本文關(guān)鍵詞：寧波地鐵翠柏里站基坑開挖模擬及變形分析　出處：《安徽理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 地鐵車站 深基坑 支護(hù)結(jié)構(gòu) 數(shù)值模擬 現(xiàn)場(chǎng)監(jiān)測(cè)

【摘要】：隨著我國城市化進(jìn)程的加速推進(jìn),城市地下空間的開發(fā)和利用已經(jīng)成為了當(dāng)下城市建設(shè)的一個(gè)熱點(diǎn),這也使得在城市建設(shè)過程中越來越多地涉及到深基坑工程。在沿海地區(qū),復(fù)雜條件下基坑穩(wěn)定性的預(yù)測(cè)評(píng)估變得尤為重要。寧波地鐵四號(hào)線翠柏里站基坑深16.2m,長約200m,且處于沿海淤泥質(zhì)地層,工程施工難度大。本文以此為研究工程背景,通過對(duì)多種土體本構(gòu)模型的分析,選用了適應(yīng)于該種地質(zhì)條件的小應(yīng)變硬化土模型(HSS),并結(jié)合相關(guān)參數(shù)取值經(jīng)驗(yàn),選用了合適的模型參數(shù),在基坑開挖前使用Plaxis巖土工程有限元軟件對(duì)基坑的開挖過程進(jìn)行了建模分析,得到了多種支護(hù)方案下基坑的應(yīng)力變形特性,評(píng)估了基坑的穩(wěn)定性。同時(shí)還使用GE05巖土工程設(shè)計(jì)軟件對(duì)該基坑基于彈性支點(diǎn)法進(jìn)行計(jì)算分析,并與前述結(jié)果相比較。最后,通過對(duì)基坑深層水平位移的現(xiàn)場(chǎng)實(shí)測(cè),得到了實(shí)際變形數(shù)據(jù),并與有限元模擬結(jié)果進(jìn)行對(duì)比,分析了誤差存在的原因,為后續(xù)研究和相似基坑工程的設(shè)計(jì)提供了經(jīng)驗(yàn)。
[Abstract]:With the acceleration of urbanization in China, the development and utilization of urban underground space has become a hot spot of urban construction. This also makes the process of urban construction more and more involved in deep foundation pit engineering. In coastal areas. It is very important to predict and evaluate the stability of foundation pit under complex conditions. The foundation pit depth of Cui Baili Station of Ningbo Metro Line 4 is 16.2 m, which is about 200 m long, and it is located in the silt layer along the coast. Based on the analysis of various constitutive models of soil mass, a small strain hardening soil model suitable for this kind of geological condition is selected. Combined with the experience of selecting the relevant parameters, the appropriate model parameters are selected, and the excavation process of the foundation pit is modeled and analyzed by using the Plaxis geotechnical engineering finite element software before the excavation of the foundation pit. The stress and deformation characteristics of foundation pit under various support schemes are obtained, and the stability of foundation pit is evaluated. At the same time, GE05 geotechnical engineering design software is used to calculate and analyze the foundation pit based on elastic fulcrum method. Finally, through the field measurement of deep horizontal displacement of foundation pit, the actual deformation data are obtained, and compared with the results of finite element simulation, the reason of the error is analyzed. It provides experience for further study and design of similar foundation pit engineering.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU753

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本文編號(hào)：1382560