發(fā)布時間：2018-10-15 16:11

【摘要】：地下連續(xù)墻作為一種優(yōu)良的擋土防水結(jié)構(gòu),自問世以來,經(jīng)過將近一個世紀(jì)地發(fā)展,在世界上得到了廣泛的應(yīng)用,不僅積累了大量的施工經(jīng)驗,其理論知識也已成體系。到目前為止,矩形與圓形等簡單形狀地下連續(xù)墻已經(jīng)為世人所熟練運(yùn)用,但是隨著對地下連續(xù)墻安全性與經(jīng)濟(jì)性更高的追求,工程師開始采用一些特殊形狀的地下連續(xù)墻結(jié)構(gòu),并希望以此得出相關(guān)理論,積累施工經(jīng)驗,從而推動地下連續(xù)墻技術(shù)的全面發(fā)展。本文以岳陽洞庭湖第二大橋君山側(cè)錨碇深基礎(chǔ)工程為依托,對其世界罕見,國內(nèi)第一的葫蘆型地下連續(xù)墻進(jìn)行了分析研究。首先,對所提供的地下連續(xù)墻的施工圖進(jìn)行詳盡地研究,同時熟悉相關(guān)工程地質(zhì)資料,再通過巖土工程界常用的大型計算軟件FLAC3D建立完整的三維地質(zhì)模型,并按照施工步驟進(jìn)行數(shù)值模擬。其次,對數(shù)值模擬結(jié)果進(jìn)行分析,通過得出的地表沉降,地下連續(xù)墻水平位移、縱向彎矩、環(huán)向彎矩,基地隆起等結(jié)果,得到施工過程中的最不利工況等關(guān)鍵數(shù)據(jù),并整體把握結(jié)構(gòu)的安全性。最后,利用數(shù)值模擬得出的結(jié)果,擬定一份完整的施工監(jiān)測方案,做到降低施工安全風(fēng)險,積極應(yīng)對施工事故的目的,確保整個施工過程中的生命與財產(chǎn)安全。數(shù)值模擬分析了葫蘆型地下連續(xù)墻的變形與內(nèi)力,為工程設(shè)計與施工提供了理論指導(dǎo)和技術(shù)支持,再通過科學(xué)有效的監(jiān)測方案最終保證該重難點施工工程的安全。
[Abstract]:As an excellent retaining and waterproof structure, underground continuous wall has been widely used in the world after nearly a century of development. It not only has accumulated a lot of construction experience, but also its theoretical knowledge has been systematized. Up to now, rectangular and circular underground continuous walls with simple shapes have been used skillfully in the world. However, with the pursuit of higher safety and economy of underground continuous walls, engineers have begun to adopt some special shape underground continuous wall structures. It is hoped that the relevant theories can be obtained and the construction experience will be accumulated to promote the overall development of underground continuous wall technology. In this paper, based on the deep foundation project of Junshan side Anchorage of the second Bridge of Dongting Lake in Yueyang, the paper makes an analysis and research on the hoist type underground continuous wall, which is rare in the world and the first in China. First of all, the construction drawings of underground continuous wall are studied in detail, at the same time familiar with the relevant engineering geological data, and then the complete three-dimensional geological model is established by using the large-scale calculation software FLAC3D, which is commonly used in geotechnical engineering. Numerical simulation is carried out according to the construction procedure. Secondly, through the analysis of the numerical simulation results, the key data such as surface subsidence, horizontal displacement of underground continuous wall, longitudinal moment, circumferential moment, base uplift and so on are obtained. And overall grasp the security of the structure. Finally, using the results of numerical simulation, a complete construction monitoring scheme is drawn up to reduce the construction safety risk, actively respond to the construction accident, and ensure the safety of life and property in the whole construction process. The deformation and internal force of hoist type underground continuous wall are analyzed by numerical simulation, which provides theoretical guidance and technical support for engineering design and construction, and finally ensures the safety of the heavy and difficult construction project through scientific and effective monitoring scheme.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.55;U448.25
，

本文編號：2273073