无填料振冲法加固吹填粉细砂现场试验研究  

Local Test Study of Vibroflotation on Hydraulic Backfilled Silty and Fine Sand without Additional Backfill Materials

作　　者：叶观宝[1,2] 苌红涛[1,2] 徐超[1,2] 安家豪 

机构地区：[1]同济大学地下建筑与工程系,上海市200092 [2]同济大学岩土及地下工程教育部重点实验室,上海市200092 [3]中国兵器工业北方勘察设计研究院,石家庄市050011

出　　处：《勘察科学技术》2009年第4期3-6,9,共5页Site Investigation Science and Technology

基　　金：上海市重点学科建设项目(B308)

摘　　要：该文基于无填料振冲法加固机理,结合某近海电厂工程试验区吹填粉细砂的地基处理工程实践,对无填料振冲法加固饱和吹填粉细砂地基的适宜性及加固效果进行了现场试验研究。根据地基处理时孔隙水压力监测情况及原位测试结果,对振冲法施工时的留振时间、振冲点间距等问题进行了分析。试验结果表明,无填料振冲法加固饱和吹填粉细砂地基效果良好,为类似地基处理提供了参考依据。Based on the mechnism of vibrofiotation method without additional backfill materials, combined with ground treatment example by hydraulic backfill silty and fine sand at an electric power plant , the suitability and strengthening effect of vibroflotation without additional backfill materials on silty and fine sand is experimentally studied. The vibration time and the distance between two vibration spots are analyzed through the monitoring condition of pore water pressure and result of in-situ test. The test results show that the vibroflotation without additional backfill materials is a good method for strengthening the hydraulic backfill silty and fine sand, and it provides references for similar ground treatment.

关 键 词：地基处理 无填料振冲法 吹填粉细砂 原位测试 

分 类 号：TU472[建筑科学—结构工程]