真空联合堆载预压处理深厚软土效果分析  

Effect analysis of vacuum combined with surcharge preloading for deep soft soil

作　　者：张红 张金良 朱永年 龚丽飞[1,2] 朱方方 吴月龙 

机构地区：[1]南京瑞迪建设科技有限公司,南京210029 [2]南京水利科学研究院,南京210029

出　　处：《土工基础》2014年第6期43-46,共4页Soil Engineering and Foundation

摘　　要：软土由吹填土和原状淤泥质土构成,平均深度为25m,且表层覆盖回填土层,采用真空联合堆载预压法进行处理。检测结果表明,该场地表层承载力达到100kPa以上,下部淤泥质土层承载力达到80kPa,平均沉降153.14～202.79cm,加固效果非常明显。实践证明,针对该区的深厚淤泥质软土地基,真空联合堆载法具有加固效果好、工期短和施工安全等优点,值得在该地区工程建设中推广应用。This paper presents a case history of improvement of thick soft soils by using a combination of vacuum preloading and surcharge methods. The subsurface conditions of the Economic Development Zone of Golan, Zhuhai, consist of hydraulic dredged soils and mucky soils with an average thickness of 25 meters. The soil improvement technique and construction monitoring results are analyzed. The results indicate that the allowable bearing capacity of the surface soil is 100 kPa and the capacity of the deeper soils could be 80 kPa. The average ground settlement of the site varied from 153.14 cm to 202.79 cm. The vacu- um preloading combined with surcharge has the characteristics of short construction duration; safe installations, and excellent improvement result.

关 键 词：真空联合堆载预压 深厚淤泥软土 监测与检测 沉降 位移 固结度 

分 类 号：TU472[建筑科学—结构工程]