摘要
采用ABAQUS有限元软件,考虑斜坡嵌岩群桩施工与承载等流程,以及桩岩相互作用力学性状与材料应力应变非线性影响,构建斜坡-四边形四桩三维模型体系,在桩嵌岩深度、斜坡坡度等变化情况下,对斜坡四边形四桩的水平承载能力进行分析。分析表明,不同坡度和嵌岩深度条件下嵌岩群桩水平承载能力,是群桩桩身刚度与桩前岩体抗力、群桩基础的空间效应等综合作用的体现。随着坡度的逐渐增加,前排桩(桩1和桩2)桩顶水平承载力发挥程度逐渐减小,后排桩(桩3和桩4)桩顶水平承载力发挥程度逐渐增大,即对限制承台中心点水平位移的贡献度逐渐增加。
In this paper, ABAQUS is used to establish a three-dimensional model of the slope rock-socketed group piles system(quadrilateral four piles). The modeling process includes construction and bearing load of the slope rock-socketed group piles system, and the nonlinear effects of material and pile-rock contact are considered when three-dimensional models of the slope rock-socketed group piles system are established. The horizontal bearing capacity of slope rock-socketed group piles is analyzed under different slope angle and socketed depth. Results show that under different slope angle and socketed depth, horizontal bearing capacity of slope rock-socketed group piles is the comprehensive reflection of pile stiffness of pile groups, rock resistance before pile, spatial effect of group piles foundation etc. With the gradual increase of slope angle, the horizontal bearing capacity of front row piles(piles 1 and 2) decreases gradually while that of post piles(pile 3 and pile 4) increases gradually, and the contribution to limiting the horizontal displacement of the center of the cap increases gradually.
作者
周世良
王永艺
ZHOU Shiliang;WANG Yongyi(Chongqing Southwest Research Institute for Water Transport Engineering,Chongqing Jiaotong University,Chongqing 400016,China;School of Civil Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《水利与建筑工程学报》
2019年第1期113-118,共6页
Journal of Water Resources and Architectural Engineering
基金
宁波市交通运输科技项目(201704)
关键词
陡岩河岸
高桩墩式码头
群桩基础
水平承载
steep rock bank of river
high pile pier type wharf
group piles
horizontal bearing
