本文選題：深基坑 + 支護(hù)體系�。� 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：隨著我國經(jīng)濟(jì)發(fā)展和城市化建設(shè)的推進(jìn),大量深基坑項(xiàng)目涌現(xiàn),甚至一些超高層建設(shè)處于成熟的市區(qū)商業(yè)金融中心。這種情況下,對深基坑支護(hù)的要求并不僅僅停留在原先比較單一的形式,當(dāng)周邊復(fù)雜的環(huán)境和有限的場地條件不允許采用放坡開挖時(shí),對支護(hù)方式選擇提出了非常苛刻的標(biāo)準(zhǔn)。而周邊的既有建筑更是對深基坑實(shí)際開挖和支護(hù)增加大量額外的難題。所以在深基坑工程中,既要保證既有建筑不受基坑開挖影響,又要保障基坑本身的質(zhì)量、安全和進(jìn)度。既有建筑使得基坑的在地下水和側(cè)向土壓力問題上出現(xiàn)很多安全隱患,對施工工藝和實(shí)際可操作性也會(huì)有較大的影響。合理、科學(xué)、可行的支護(hù)方式是確保深基坑的安全和質(zhì)量的前提。故如何因地制宜的選擇支護(hù)方式對深基坑工程而言是一個(gè)最重要的課題。本文在廣泛搜集和查閱文獻(xiàn)資料基礎(chǔ)上,對深基坑工程支護(hù)方式存在的問題、研究意義、國內(nèi)外研究現(xiàn)狀以及發(fā)展趨勢進(jìn)行分析,并結(jié)合實(shí)際工程案例深圳市達(dá)實(shí)智能大廈改擴(kuò)建項(xiàng)目,以緊鄰地鐵區(qū)間隧道和既有建筑為背景,綜合工程地質(zhì)條件、周邊的環(huán)境、基坑設(shè)計(jì)對深基坑支護(hù)進(jìn)行研究分析。本文所做的主要工作如下:介紹深基坑常見支護(hù)方式、特點(diǎn)及適用類型;根據(jù)工程地質(zhì)條件與現(xiàn)場實(shí)際條件,研究分析達(dá)實(shí)智能大廈改擴(kuò)建項(xiàng)目基坑支護(hù)方式,對其合理性、可行性、技術(shù)性論證,分析整合基坑監(jiān)測單位反饋數(shù)據(jù);利用有限差分軟件MIDAS對緊鄰軌道交通1號(hào)線區(qū)間隧道的基坑進(jìn)行了三維模擬,研究基坑的受力特性和變形規(guī)律,并與實(shí)際監(jiān)測數(shù)據(jù)進(jìn)行比較。
[Abstract]:With the development of economy and urbanization in China, a large number of deep foundation pit projects have emerged, and even some super-high-rise construction is in the mature urban commercial and financial center. In this case, the requirement of deep foundation pit support is not only in the original relatively single form, when the surrounding complex environment and limited site conditions do not allow the use of slope excavation, a very harsh standard for the choice of supporting mode is put forward. The surrounding existing buildings add a lot of additional problems to the actual excavation and support of deep foundation pit. Therefore, in the deep foundation pit engineering, it is necessary to ensure that both buildings are not affected by the excavation, and the quality, safety and schedule of the foundation pit itself must be guaranteed. Existing buildings make the foundation pit in the groundwater and lateral earth pressure problems appear a lot of hidden dangers, and will also have a greater impact on the construction technology and practical maneuverability. Reasonable, scientific and feasible supporting method is the premise to ensure the safety and quality of deep foundation pit. Therefore, how to choose the supporting method according to local conditions is the most important subject for deep foundation pit engineering. Based on the extensive collection and reference of literature, this paper analyzes the existing problems, research significance, domestic and foreign research status and development trend of deep foundation pit engineering support. Combined with actual engineering cases, the reconstruction and extension project of Dashi Intelligent Building in Shenzhen City is studied and analyzed on the background of adjacent subway tunnel and existing building, comprehensive engineering geological conditions, surrounding environment, foundation pit design and support for deep foundation pit. The main work of this paper is as follows: introduce the common supporting methods, characteristics and applicable types of deep foundation pit, according to the engineering geological conditions and field actual conditions, study and analyze the supporting method of foundation pit in the extension project of Dashi Intelligent Building, and make it reasonable. Feasibility, technical demonstration, analysis and integration of the feedback data of foundation pit monitoring unit, 3D simulation of the foundation pit adjacent to the tunnel of line 1 of rail transit is carried out by using finite difference software MIDAS, and the stress characteristics and deformation law of the foundation pit are studied. And compared with the actual monitoring data.
【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)】：U456.3;U231;TU753

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