884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（1 寧波市機(jī)電工業(yè)研究設(shè)計(jì)院 315012;  2 寧波大學(xué)地基處理中心 315000）
【提要】 預(yù)制空心方樁兼?zhèn)漕A(yù)制樁和預(yù)應(yīng)力管樁的一些特性。簡(jiǎn)要介紹了空心方樁的技術(shù)參數(shù)特性，分析了空心方樁樁側(cè)和樁端阻力特征，并通過(guò)實(shí)驗(yàn)室試驗(yàn)和大量工程實(shí)例論述了單樁承載力和變形特性，提出了空心方樁極限承載力的計(jì)算公式。結(jié)論認(rèn)為，在飽和軟土地區(qū)，空心方樁單樁的工作性狀良好，可有效提高樁側(cè)阻力，減小沉降，比預(yù)應(yīng)力管樁的單樁承載力高出20%～40%左右。
【關(guān)鍵詞】 空心方樁 單樁 承載性狀 承載力 特性
Bearing Performance and Engineering Application of Steel Concrete Hollow Square Pile/Pan Qi 1,Zhuang Zuocheng1, Chen Zhong2, Kong Chao2, Zhu Jiping1 (1 Ningbo Research Design Institude of MechanicalElectrical Industry, Ningbo　315012, China; 2 Soil Improvement Center of Ningbo University, Ningbo　315000,China)
Abstract:Prefabricate hollow square pile is a kind of new pile, of which performance is between the solid square pile and prestressed pipe pile. The technical parameter characteristics of hollow square pile and the characteristics of pile side and pile end resistance are introduced. Single pile bearing capacity and distortion characteristics got from experiments in the laboratory and many engineering examples are discussed and the calculation formula of hollow square pile limit bearing capacity is provided. It shows that the hollow square pile performances well in saturable soft slay area. It can improve pile side resistance effectively and decrease the sink. The single pile bearing capacity of hollow square pile is about 20%～40% higher than that of the prestressed pipe pile.
Keywords:hollow square pile； single pile； bearing performance； bearing capacity； characteristic