基于微观结构的软土地基加固效果评价  

Effect evaluation of the Reinforcement of Soft Ground Based on Microstructure

作　　者：周翠英[1] 林春秀[2] 刘祚秋[1] 李亚生[2] 丘建金 李德福[2] 

机构地区：[1]中山大学应用力学与工程系,广东广州510275 [2]中山大学地球科学系,广东广州510275 [3]深圳市勘察测绘院,广东深圳518028

出　　处：《中山大学学报（自然科学版）》2004年第5期20-23,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(59809037);广东省自然科学基金资助项目(980274);广东省科技攻关项目专项基金资助项目(2001B30903)

摘　　要：以深圳市宝安新中心区软基处理工程为研究对象,根据强夯、堆载联合塑料排水板地基处理过程,取得实验过程和地基处理后软土再压缩的电镜扫描(SEM)图片,通过图像处理和定量化研究,得到土体微结构参数(孔隙分布分维d)及其随压力变化的规律,从而,对施工场地不同的地基处理方案进行了加固效果对比分析。结果表明:堆载预压法对软土地基的加固效果在研究的时间段内要优于强夯处理法。This paper associating the consolidation experiment with the reinforcement of soft ground by dynamic compaction and preloading; get the photos of the scanning of electrical microscope(SEM); get a quantitative parameter-pore fractal dimension and its developmental trend along with the pressure through imaging manipulation and quantitative analysis; gave a effect evaluation of the reinforcement of soft ground by dynamic compaction and the influenced area of the compaction as well as the preloading. The results show that the preloading is better than dynamic compaction on the reinforcement effect in the research-time.

关 键 词：软土 微观结构 室内固结试验 孔隙分布分维 堆载预压 动力固结(强夯) 

分 类 号：TU471[建筑科学—结构工程]