支盘桩承受动、静组合荷载时桩侧土中应力分析  

Stress analysis in soil of the squeezed branch and plate pile side bearing dynamic and static loads

作　　者：高笑娟[1] 高敬民[1] 周桂元[1] 刘滔[1] 周金龙[1] 

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023

出　　处：《河南理工大学学报（自然科学版）》2016年第3期424-429,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(11502072);河南省教育厅重点基金资助项目(14A410003)

摘　　要：研制了一套能够对模型桩基同时施加竖向荷载和水平向周期荷载的加载装置,保证水平周期荷载施加过程中竖向荷载保持轴心位置。在此装置上对一根等直径桩和两根承力盘位置不同的支盘桩施加了竖向荷载和水平周期荷载,研究了桩侧土中压力的变化情况。结果表明,水平向激振荷载的大小、激振频率的大小、有无承力盘以及承力盘的位置等因素对桩侧土中压力的大小均存在明显影响。根据试验结果对如何提高基桩承受水平动荷载的能力提出了合理的建议。To study the stress characteristics of the soil beside the branch and plate pile under vertical staticand lateral period loads,the experiment test device was made. The test device may ensure the vertical axiallyloaded during the lateral period load applying. Then, three model pile of one equal-diameter pile and twosqueezed branch and plate piles with one plate were made and tested on the equipment. The three piles wereall applied vertical static load and lateral period load. The results show that lateral period load, excitation frequencyand position of plate along pile body are influencing factors to the soil pressure. Some reasonable suggestionswere put forward for practical engineering.

关 键 词：支盘桩 组合荷载 应力特性 水平周期荷载 土压力 

分 类 号：TU443[建筑科学—岩土工程]