DDC桩法桩周土挤密影响范围的试验研究  

Experimental study on compaction influencing scope of the soil by DDC pile method

作　　者：刘晶晶[1] 丁伟[1] 宋鹏波 郭军[1] 石明禄[1] 

机构地区：[1]河北建设勘察研究院有限公司,石家庄050031

出　　处：《工程勘察》2016年第10期6-9,共4页Geotechnical Investigation & Surveying

摘　　要：依托山西某电厂项目地基处理工程实例,进行了灰土挤密桩桩周土挤密效果的试验,根据实测桩周土体径向位移、土压力、干密度、单桩复合地基承载力静载荷等试验数据,分析表明:DDC桩法桩周土体(距桩中心)有效挤密范围约为0.7D(D为成桩直径),挤密影响范围约为1.5D,处理后单桩复合地基承载力有较大幅度提升,能够满足设计要求。Based on a foundation treatment engineering project,the compaction effect tests of the soil surrounding piles for lime-soil compaction piles are carried out. According to the testing scheme combined with the measured data of the soil horizontal displacement,earth pressure,dry density and the bearing capacity of single pile from composite foundation static loads to analyze,the analysis results show that under the DDC creating pile method the effective compaction scope（ from the centre of pile） is about 0. 7D（ D is the diameter of pile） and the compaction scope of the soil surrounding pile is about 1. 5D. After the foundation treatment,the bearing capacity of the compound foundation has significant improvement and satisfies the requirement of design.

关 键 词：DDC桩法 土体位移 土压力 挤密系数 

分 类 号：TU472[建筑科学—结构工程]