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地下連續(xù)墻基坑支護(hù)技術(shù)在舊改深基坑工程中的應(yīng)用研究

發(fā)布時(shí)間:2018-01-20 07:07

  本文關(guān)鍵詞: 深基坑支護(hù)技術(shù) 地下連續(xù)墻 數(shù)值模擬 優(yōu)化設(shè)計(jì) 關(guān)鍵施工技術(shù) 出處:《安徽理工大學(xué)》2017年碩士論文 論文類型:學(xué)位論文


【摘要】:目前,隨著我國政治、經(jīng)濟(jì)、文化的全面建設(shè)工作的開展,各地新興城市的建設(shè)及開發(fā)也呈現(xiàn)出了前所未有的蓬勃態(tài)勢(shì)。然而,新舊城市城區(qū)發(fā)展規(guī)劃思路不符的現(xiàn)狀成為這些城市發(fā)展的短板,一定程度上阻礙了城市全面開發(fā)之路,尤其是北上廣深及沿海等地率先發(fā)展起來的城市,舊城規(guī)劃掣肘城市發(fā)展的情況更為突出。而近年來城市地價(jià)暴漲及用地趨緊的現(xiàn)實(shí)狀況,也給各地城市規(guī)劃部門計(jì)劃采取的城市發(fā)展中心逐步轉(zhuǎn)移的開發(fā)思路帶來了沉重的打擊。在這樣的現(xiàn)實(shí)背景下,人們開始將目光聚焦在一些始建于上世紀(jì)90年代的體量較大的建筑上,通過改造老舊建筑來滿足新城市發(fā)展規(guī)劃的需求,而對(duì)老舊建筑基坑支護(hù)體系處理效果的好壞將直接影響到改造項(xiàng)目運(yùn)營成本的高低及后續(xù)結(jié)構(gòu)施工質(zhì)量的好壞;拥耐练介_挖及支護(hù)作為建筑行業(yè)一項(xiàng)重要的工程內(nèi)容,已廣泛應(yīng)用于上海、深圳等大型城市及沿海軟土地區(qū)的一些中小城市,目前常用的基坑支護(hù)形式有放坡支護(hù)、土釘墻噴錨支護(hù)、排樁支護(hù)、地下連續(xù)墻支護(hù)及包含多種支護(hù)形式的復(fù)合型結(jié)構(gòu)支護(hù)等,放坡開挖占地較大,土釘墻支護(hù)易對(duì)周圍環(huán)境造成較大擾動(dòng),而排樁支護(hù)往往需在支護(hù)結(jié)構(gòu)與地下室外墻之間為工人預(yù)留一定的操作空間,以便于結(jié)構(gòu)模板工程、鋼筋工程等的正常開展,該操作空間在地下室結(jié)構(gòu)施工完畢后予以回填,導(dǎo)致大面積建筑空間的浪費(fèi)。因此,在舊改深基坑工程中采用地下連續(xù)墻基坑支護(hù)技術(shù)無論是為理論研究提供依托,還是為類似工程提供借鑒都具有深遠(yuǎn)的現(xiàn)實(shí)意義,本課題以作為舊改深基坑工程的珠海萬菱環(huán)球中心項(xiàng)目為依托,對(duì)地下連續(xù)墻基坑支護(hù)技術(shù)進(jìn)行了深入的探討及研究,以探索該支護(hù)方式在特定施工條件下的合理性,并總結(jié)施工經(jīng)驗(yàn),為類似工程的施工提供借鑒及參考。
[Abstract]:At present, with the overall construction of politics, economy and culture in our country, the construction and development of emerging cities in various places have also shown unprecedented vigorous situation. New and old urban development planning ideas of the status quo has become a short board for the development of these cities, to a certain extent hindered the road to comprehensive development of the city, especially in the north of Guangzhou-Shenzhen and coastal areas to take the lead in the development of cities. Urban planning constraints urban development is more prominent. In recent years, urban land prices have skyrocketed and land use has become tighter. It has also brought a heavy blow to the development thinking of the urban development center gradually transferred by the urban planning departments. In such a realistic background. People began to focus on some of the larger buildings that were built in -10s to meet the needs of the new urban development plan through the transformation of old buildings. The treatment effect of foundation pit support system in old buildings will directly affect the operation cost of reconstruction project and the quality of subsequent structure construction. Excavation and support of foundation pit is an important part of the construction industry. The content of the project. Has been widely used in Shanghai, Shenzhen and other large cities and some small and medium-sized cities in the coastal soft soil areas. At present, the commonly used forms of foundation pit support are slope support, soil nailing wall shotcrete anchor support, pile row support. The underground continuous wall support and the composite structure support including many kinds of support forms, the slope excavation occupies a large area, and the soil nailing wall support is easy to cause great disturbance to the surrounding environment. In order to facilitate the normal development of structural formwork and reinforcement engineering, it is necessary to reserve a certain operation space between the supporting structure and the exterior wall of the basement. The operation space is backfilled after the construction of the basement structure, which leads to the waste of large area of building space. It is of far-reaching practical significance to use the retaining technology of underground continuous wall foundation pit in the old and deep foundation pit engineering, whether it is to provide the support for theoretical research or for similar projects to provide reference. Based on the project of Wanling Global Center of Zhuhai, which is used as the old project to reform deep foundation pit, this paper makes a deep discussion and research on the supporting technology of underground continuous wall foundation pit. In order to explore the rationality of the support method under the specific construction conditions, and summarize the construction experience, to provide reference and reference for the construction of similar projects.
【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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