承台-倾斜桩体系承载力性状分析

发布时间：2018-04-21 21:08

本文选题：桩基工程 + 倾斜群桩　；参考：《长江科学院院报》2015年12期

【摘要】：预应力管桩在施工中发生桩身倾斜的现象屡见不鲜。为得到承台连接下倾斜桩的承载力特性,通过现场实测数据反演得到了合理的土层及桩体参数,之后建立数值模型,分析了承台下有2根桩且其中1根桩为倾斜桩的结构体系,在3种不同倾斜方向工况下的承载力性状。研究结果表明:单根桩体倾斜对承载力的影响不大,特别是工况1条件下,桩体倾斜对承载力的影响甚微;桩身轴力随着桩体倾斜程度的增加而增大,仅在工况1中倾斜桩的轴力发展趋势为先增大后减小。3种工况下桩身弯矩分布特征类似,且桩顶弯矩最大;但是当桩体倾斜方向不同时,桩顶正负弯矩也不同。综合来看,3种工况的承载力大小为工况1工况2工况3。
[Abstract]:The phenomenon of inclined pile body in construction of prestressed pipe pile is common. In order to obtain the bearing capacity characteristics of inclined pile under pile cap connection, reasonable soil layer and pile body parameters are obtained by inversion of field measured data, and then numerical model is established, and the structural system with two piles under the cap and one of which is inclined pile is analyzed. The bearing capacity of three different tilting directions. The results show that the single pile tilting has little effect on the bearing capacity, especially under the condition of working condition 1, and the axial force of the pile increases with the increase of the inclined degree of the pile. Only in working condition 1, the axial force of inclined pile tends to increase first and then decrease. 3. The distribution characteristics of bending moment of pile body are similar, and the bending moment of pile top is the largest, but when the inclined direction of pile is different, the positive and negative moment of pile top is also different. In a word, the bearing capacity of three kinds of working conditions is 1 condition 1, 2 condition 2 condition 3.
【作者单位】：连云港职业技术学院建筑工程系;
【基金】：住房和城乡建设部科技计划项目(2015-K3-023) 江苏省建设系统科技项目(2015ZD37) 江苏省“六大人才高峰”高层次人才资助项目(2014-JZ-016)
【分类号】：TU473.1

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