【摘要】：為了研究基坑開挖的變形規(guī)律以及變形的預(yù)測,以國家地理信息科技產(chǎn)業(yè)園5A地塊的基坑工程為背景,針對基坑變形的形態(tài)、變形的影響因素和變形的控制進(jìn)行了研究,同時(shí)對樁錨支護(hù)結(jié)構(gòu)的作用機(jī)理進(jìn)行了分析；結(jié)合該基坑的設(shè)計(jì)和施工情況,對該基坑的樁頂水平位移以及周圍的地表沉降變形進(jìn)行現(xiàn)場監(jiān)測,通過對監(jiān)測數(shù)據(jù)的分析得到了該基坑的變形規(guī)律；利用灰色理論的關(guān)聯(lián)度分析,以監(jiān)測的數(shù)據(jù)為參考依據(jù),對觀測點(diǎn)之間以及位移和沉降之間的關(guān)聯(lián)度進(jìn)行了分析,得到了它們之間的關(guān)聯(lián)程度；同時(shí)利用GM(1,1)模型對基坑開挖的變形進(jìn)行了預(yù)測應(yīng)用,驗(yàn)證了GM(1,1)模型在基坑的變形預(yù)測中精度較高,可以用來進(jìn)行變形的預(yù)測；利用MIDAS有限元分析軟件對該基坑的開挖進(jìn)行模擬,通過模擬結(jié)果對開挖的變形規(guī)律進(jìn)行了分析,同時(shí)對施工中的超挖和超載對基坑的變形影響進(jìn)行了模擬,分析了超挖和超載對基坑開挖的影響規(guī)律。
[Abstract]:In order to study the deformation law and prediction of foundation pit excavation, taking the foundation pit engineering of 5A block of National Geographic Information Science and Technology Park as the background, the shape of foundation pit deformation, the influencing factors of foundation pit deformation and the control of deformation are studied. At the same time, the mechanism of pile-anchor supporting structure is analyzed. Combined with the design and construction of the foundation pit, the horizontal displacement of the pile top and the ground subsidence deformation around the foundation pit are monitored on the spot, and the deformation law of the foundation pit is obtained through the analysis of the monitoring data. Based on the data of monitoring, the correlation degree between observation points and between displacement and settlement is analyzed by using the correlation degree analysis of grey theory, and the correlation degree between them is obtained. At the same time, the GM (1t1) model is used to predict the deformation of foundation pit excavation. It is verified that GM (1t1) model has high accuracy in the prediction of foundation pit deformation, and it can be used to predict the deformation of foundation pit. The MIDAS finite element analysis software is used to simulate the excavation of the foundation pit. The deformation law of the excavation is analyzed through the simulation results, and the influence of overexcavation and overload on the deformation of the foundation pit is simulated. The influence of overexcavation and overload on foundation pit excavation is analyzed.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU753

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