發(fā)布時(shí)間：2018-02-27 14:29

  本文關(guān)鍵詞： 人工挖孔灌注樁 樁基參數(shù)設(shè)計(jì) 樁基施工 樁基檢測(cè) 樁基承載力　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】：隨著國民經(jīng)濟(jì)和工程技術(shù)的飛速發(fā)展,越來越多的高、大、重型建筑物出現(xiàn)在人們的視野中,這就給基礎(chǔ)的承載性帶來了更大的要求和更強(qiáng)的挑戰(zhàn)。大直徑挖孔樁在這種環(huán)境下就得到了更為廣泛的應(yīng)用,并遍布世界的每個(gè)角落。論文以合肥某公司軟件研發(fā)生產(chǎn)樓工程為案例,根據(jù)該工程的地質(zhì)條件和施工條件,從保證施工安全并盡可能的降低成本出發(fā),通過對(duì)采用的人工挖孔灌注樁受力形式、破壞形式以及單樁承載力等方面進(jìn)行分析,結(jié)合上部結(jié)構(gòu)的荷載傳遞情況及地基土層分布情況合理的選擇了樁型并對(duì)樁的參數(shù)(包括直徑、深度、擴(kuò)大頭尺寸、根數(shù)和鋼筋籠、混凝土參數(shù)等)進(jìn)行優(yōu)化設(shè)計(jì)。嚴(yán)格按照設(shè)計(jì)的施工工藝(測(cè)量樁位的放樣-砌筑孔臺(tái)-逐級(jí)挖孔及現(xiàn)澆混凝土護(hù)壁-中間驗(yàn)收-擴(kuò)孔-成孔驗(yàn)收-清渣排水-吊裝、焊接、固定鋼筋籠-灌注混凝土成樁)和安全技術(shù)措施施工。采用低應(yīng)變反射波法和聲波透射法分別對(duì)完成的挖孔樁進(jìn)行基樁的完整性和承載力的檢測(cè),通過分析比較兩種方法對(duì)基樁完整性的檢測(cè)數(shù)據(jù)發(fā)現(xiàn),兩種方法得到結(jié)果十分的吻合,從而驗(yàn)證了本工程的55根樁完整性良好性,因此可以下結(jié)論本工程人工挖孔灌注樁達(dá)到了一類樁的范疇。
[Abstract]:With the rapid development of national economy and engineering technology, more and more high, large and heavy buildings appear in people's view. This brings greater demands and challenges to the bearing capacity of the foundation. Large diameter excavated piles are more widely used in this environment. This paper takes the software R & D and production building project of a company in Hefei as a case study. According to the geological conditions and construction conditions of the project, it is necessary to ensure the safety of construction and to reduce the cost as far as possible. Through the analysis of the force form, the failure form and the bearing capacity of the single pile, the manual excavated cast-in-place pile is used. Combined with the load transfer of the superstructure and the distribution of the soil layer of the foundation, the pile type is reasonably selected and the parameters of the pile (including diameter, depth, enlarged head size, root number and reinforcement cage) are selected reasonably. Optimization design is carried out in accordance with the design construction technology (measuring pile position layout-masonry hole platform-step by step digging hole and cast-in-situ concrete wall protection-intermediate acceptance-hole expansion-hole completion acceptance-slag drainage-hoisting, welding, welding, etc.). The construction of fixed steel cage and pouring concrete pile) and the construction of safety measures. The integrity and bearing capacity of the foundation pile were tested by using low strain reflection wave method and acoustic wave transmission method respectively. By analyzing and comparing the data of the two methods on the integrity of foundation pile, it is found that the results of the two methods are in good agreement with each other, thus verifying the integrity of 55 piles in this project. Therefore, it can be concluded that the artificial excavated cast-in-place pile reaches the category of a class of piles.
【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)】：TU753.3

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