深厚杂填土地基挤密桩加固效果试验研究  

Experimental study on the reinforcement effect by gravel columns in fill ground

作　　者：宋斌 李朋朋 王鹏宇[1] Song Bin;Li Pengpeng;Wang Pengyu(AVIC Institute of Geotechnical Engineering Co.,Ltd.,Beijing 100098,China)

机构地区：[1]中航勘察设计研究院有限公司,北京100098

出　　处：《工程勘察》2024年第5期40-43,共4页Geotechnical Investigation & Surveying

摘　　要：在深厚杂填土场地地基处理时,挤密桩由于较好的适用性和经济性而得到广泛应用。但是,在挤密桩的加固效果计算上尚有诸多不足。在夯扩挤密桩试验研究中,通过设置观测标点,研究在以粉土、砂质粉土、黏土及碎石素填土为主的深厚杂填土场地夯扩挤密桩地基处理的效果,判断夯扩挤密桩挤密影响范围,并采用干密度试验比照分析,对定位点测量的结果进行验证。通过综合分析得到挤密桩较精确的地基加固范围,并分析竖直方向加固效果的变化,为类似工程设计提供参考。In the ground treatment of deep fill ground,compaction pile is extensively employed due to applicability and economic,but there are many defects in the reinforcement effect calculation.In this paper,the application effect of compaction pile enlarged by tamping in deep fill ground composited with silt,sandy silt,clay and gravel is studied through the observation markers,and the result is used to analyze the influencing range of enlarged compaction pile by tamping.Comparative analysis on dry density is used to verify the results of the observation point.The accurate results of the reinforcement effect of the compaction are obtained by comprehensive analysis,and then the variation of the vertical reinforcement effect is analyzed.The analysis could be referred by the similar engineering design.

关 键 词：杂填土 夯扩挤密桩 挤密影响范围 挤密效应 

分 类 号：TU625[建筑科学—建筑技术科学]