橋梁樁基豎向承載能力測試及樁土相互作用的數(shù)值模擬分析
[Abstract]:As an important part of traffic line, bridge crosses rivers, lakes and deep gullies and canyons. Pile foundation is an important part of bridge span structure. With the development of bridge building towards super span and heavy load, pile foundation has large bearing capacity and small settlement. The advantages of convenient construction and strong adaptability to various complicated geological conditions become the preferred foundation form in foundation design. Under the load transfer of the superstructure, the pile foundation not only needs to provide enough bearing capacity, but also needs to control the settlement to ensure the deformation limit of the superstructure. Therefore, it is very important to study the vertical bearing characteristics of pile foundation. In view of this, this paper mainly does the following work and obtains the corresponding conclusion: 1, summarizes the pile foundation application and the development history, the pile foundation bearing capacity test general method and the pile-soil interaction research present situation, This paper provides a theoretical basis for reasonably selecting the test method of vertical bearing capacity of pile foundation and accurately simulating pile-soil interaction by using finite element method. 2. The vertical bearing characteristics of pile foundation, including the transfer mechanism of single pile under vertical load, are discussed. The exertion mechanism of side resistance of single pile, the mechanism of end resistance of single pile and the influencing factors of bearing capacity of single pile (properties of soil around pile, geometric characteristics of pile and material of pile body) are analyzed in detail. For optimizing the design of pile foundation. 3. Based on the design and construction of pile foundation of Taiping Station fourth Line Bridge and Jiefangcun double Line Bridge, The vertical bearing capacity of three test piles was tested by field test. The static load test method of anchor pile and the slow maintenance load method were used to obtain the basic bearing capacity of the stratum, the limit friction around the pile and other soil parameters. The vertical bearing capacity of single pile is determined by load-settlement curve, and the feasibility of friction pile design is verified. 4. Combined with ABAQUS finite element software, the vertical bearing capacity of pile foundation is simulated and analyzed. The comparison between the results under graded load and the field measured results proves the applicability and reasonableness of the pile-soil interaction simulation analysis using ABAQUS. By analyzing the bearing characteristics of pile foundation under different diameter and length of pile, the reasonable size of pile foundation is determined in this paper, so as to optimize the design of pile foundation, reduce the construction difficulty and engineering cost.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:U443.15
【參考文獻】
相關(guān)期刊論文 前5條
1 王坤昂;畢景佩;趙志忠;謝義兵;;自平衡試驗與傳統(tǒng)試驗的比對研究[J];工程勘察;2014年01期
2 程曄;龔維明;張喜剛;戴國亮;;超長大直徑鉆孔灌注樁樁端后壓漿試驗研究[J];巖石力學與工程學報;2010年S2期
3 賴天文;楊有海;;超長樁荷載傳遞機理及有效樁長研究[J];蘭州交通大學學報;2007年06期
4 郭超敏;;樁基豎向抗壓承載力試驗方法探討[J];廣東建材;2006年05期
5 衡朝陽 ,何滿潮 ,姚愛軍;Experimental Research on Large Diameter Cast-in-Place Piles Embedded in Rock[J];Journal of China University of Mining & Technology;2001年02期
相關(guān)博士學位論文 前3條
1 張敏;復雜受力狀態(tài)下鋼管復合樁的工作特性研究[D];西南交通大學;2014年
2 徐麗娜;大直徑樁基承載特性的仿真試驗研究[D];吉林大學;2014年
3 馬曄;超長鉆孔灌注樁樁基承載性能的研究[D];武漢理工大學;2008年
相關(guān)碩士學位論文 前10條
1 裴超;自平衡法在大直徑超長樁基檢測中的應用研究[D];青島理工大學;2014年
2 李勝利;超長大直徑鉆孔灌注樁承載特性研究[D];河北農(nóng)業(yè)大學;2014年
3 劉紅;樁土相互作用接觸單元研究[D];重慶交通大學;2013年
4 趙雙益;超長鉆孔灌注樁單樁豎向承載性能研究[D];中南大學;2013年
5 朱良虎;大直徑深長鉆孔灌注樁豎向承載力試驗及有限元分析[D];重慶交通大學;2012年
6 王博林;自平衡法樁土荷載傳遞機理及承載特性研究[D];蘭州交通大學;2012年
7 于微微;自平衡法試樁在實際工程中的應用研究[D];哈爾濱工程大學;2012年
8 徐勇;樁基自平衡試樁法的理論分析及工程應用研究[D];中南大學;2011年
9 魏瓊;自平衡測試所得樁側(cè)摩阻力與勘察結(jié)果的對比[D];太原理工大學;2009年
10 莫小明;高層建筑考慮樁—土—結(jié)構(gòu)相互作用的近場地震響應分析[D];華中科技大學;2009年
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