發(fā)布時(shí)間：2018-08-27 20:40

【摘要】：近年來，隨著濱海新區(qū)開發(fā)開放，天津港迎來難得的歷史機(jī)遇，港口進(jìn)入大規(guī)模建設(shè)期。由于本區(qū)域新增土地多利用港口建設(shè)及疏浚航道所廢棄的大量海底淤泥進(jìn)行吹填造陸，這種人工吹填軟土地基的加固處理已成為不可避免的技術(shù)問題。本文在分析評述國內(nèi)外有關(guān)水泥攪拌樁復(fù)合地基處理技術(shù)理論和實(shí)踐的基礎(chǔ)上，結(jié)合天津港南疆港區(qū)26號碼頭工程實(shí)例，主要對區(qū)域土質(zhì)特性、吹填土地基整體加固過程、水泥土攪拌法加固機(jī)理、試樁過程（對不同的布樁方案、不同樁徑、攪拌工藝、水泥摻量的攪拌樁進(jìn)行了多組組合對比試驗(yàn)）、對不同工況進(jìn)行了數(shù)值模擬做了簡要介紹，并得到了一些有益的結(jié)論。 通過水泥攪拌樁在天津港南疆港區(qū)復(fù)合地基應(yīng)用研究，驗(yàn)證了采用梅花樁布樁方案及雙軸單向水泥攪拌樁工藝在本區(qū)域的適用性，對該水泥攪拌施工工藝進(jìn)行了總結(jié)和改進(jìn)；由于該工藝技術(shù)成熟功效較高，，在滿足工期的要求前提下減少了費(fèi)用；通過實(shí)驗(yàn)分析得出本場地水泥攪拌樁施工總體上呈上部樁身質(zhì)量優(yōu)于下部樁身的特點(diǎn)，為便于現(xiàn)場易操作性，對檢測標(biāo)準(zhǔn)進(jìn)行了優(yōu)化；結(jié)合實(shí)驗(yàn)數(shù)據(jù)，通過分析數(shù)值模型，將設(shè)計(jì)樁長優(yōu)化至16m，大大節(jié)省了工程造價(jià)；為同類型地基水泥攪拌樁施工提供了參考。
[Abstract]:In recent years, with the development and opening of Binhai New area, Tianjin Port ushered in a rare historical opportunity, and the port entered the period of large-scale construction. As the newly added land in this area is mostly filled with a large amount of sea silt abandoned by port construction and dredged waterway, the reinforcement and treatment of this artificial draught soft soil foundation has become an inevitable technical problem. On the basis of analyzing and commenting on the theory and practice of cement mixing pile composite foundation treatment at home and abroad, combined with the engineering example of No. 26 wharf in Nanjiang Port of Tianjin Port, this paper mainly deals with the regional soil quality characteristics and the whole reinforcement process of filled soil foundation. The reinforcement mechanism of cement-soil mixing method and the process of pile test are introduced briefly in this paper, which includes different pile arrangement schemes, different pile diameters, mixing process, cement mixing piles and cement mixing piles. Some useful conclusions are obtained. Through the application research of cement mixing pile in the composite foundation of Nanjiang Port of Tianjin Port, the applicability of adopting the scheme of plum-blossom pile and two-axis unidirectional cement mixing pile in this area is verified, and the cement mixing construction technology is summarized and improved. Due to the high mature effect of this technology, the cost is reduced on the premise of meeting the requirement of construction period. Through the experimental analysis, it is concluded that the quality of the upper pile body is better than that of the lower pile body in the whole construction of the cement mixing pile in this site. In order to make the site easy to operate, the test standard is optimized, the design length of pile is optimized to 16m by analyzing the numerical model, and the construction cost is greatly saved, which provides a reference for the construction of cement mixing pile of the same type foundation.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU753.3

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