- 摘 要
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(1 河南大學(xué)材料與結(jié)構(gòu)研究所，開封 475001; 2 河南大學(xué)土木建筑學(xué)院，開封 475001)
［摘要］為探討鋼筋混凝土預(yù)制樁和水泥土攪拌樁組合樁(簡稱組合樁)在水平荷載作用下的受荷特性和承載力，基于組合樁的水平載荷試驗結(jié)果和土體離散層模型，分析了這種組合樁受水平力作用時的變形、內(nèi)力和樁周土壓力分布。結(jié)果表明，鋼筋混凝土預(yù)制樁芯樁的插入改變了水泥土攪拌樁的傳力特點，提高了樁的側(cè)摩阻力和側(cè)向承載力；組合樁具有較好的抗側(cè)向變形的能力，樁體側(cè)向變形主要集中于樁的上部；樁周土體的側(cè)壓力上部較大，上部和下部受力方向相反；組合樁樁體的彎矩和剪力主要分布在樁體的上半部；芯樁對樁體的剛度、側(cè)向變形大小起決定作用，而對樁體的彎矩和剪力的分布影響較小。
［關(guān)鍵詞］鋼筋混凝土預(yù)制樁；水泥土攪拌樁；組合樁；水平受荷；芯樁
中圖分類號：TU473.1文獻標識碼：A文章編號：1002-848X(2011)03-0095-03
Characteristic of composite piles of reinforced concrete precast pile and cement mixed pile under lateral load
Peng Yanwei1, Yue Jianwei1, 2, Wei Kun2
(1 Research Institute of Material and Structural Engineering, Henan University, Kaifeng 475001, China；
2 School of Civil and Architectural Engineering, Henan University, Kaifeng 475001, China)
Abstract:To study the characteristic and capacity of a newstyle composite pile under lateral loads based on test results and discrete layer model of soil, the pile deformation, moment, shear and soil pressure around the pile were analyzed under lateral loads. The results indicate that inserting a core pile can modify stiffness and transfer way of the cement mixed pile and improve its side frictional resistance and lateral capacity. The composite pile has bigger lateral stiffness and lateral deformation is mainly distributed in the upper part of the pile under lateral load. Soil pressure around the composite pile in the upper part is bigger than that of in the lower part and has reverse direction. Moment and shear of the composite pile are also mainly distributed in the upper part. Contrast results show that the core pile plays an important role in stiffness and lateral deformation of the composite pile, and has less influence on moment and shear of the composite pile.
Keywords:cement mixed pile; reinforce concrete precastpile; composite pile; lateral load; core pile
作者簡介：彭燕偉，碩士研究生，Email：pyw0316@163.com。
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