真空降水联合强夯置换软基处理新技术与应用  

New technology and application of vacuum dewatering combined with dynamic compaction replacement for soft ground improvement

作　　者：祝思明 伍翔飞 曾华健 嵇汉卿 郑海波 ZHU Si-ming;WU Xiang-fei;ZENG Hua-jian;JI Han-qing;ZHENG Hai-bo(Jiangsu Geotechnical Engineering Company,Nanjing 210018,Jiangsu,China;Shenzhen Sukan Geotechnical Engineering Co.,Ltd.,Shenzhen 518100,Guangdong,China)

机构地区：[1]江苏省岩土工程公司,江苏南京210018 [2]深圳市苏勘岩土工程有限公司,广东深圳518100

出　　处：《地基处理》2023年第S02期34-39,53,共7页Journal of Ground Improvement

摘　　要：针对传统软基处理方法在仓储物流园、工业厂房等大面积深厚软基处理工程应用中存在工期、成本及环保等方面的局限性,提出采用真空降水联合强夯置换软基处理技术,即通过真空井点降低地下水位及减小土体含水率,随后进行强夯置换施工,其中降水与强夯置换交叉进行,通过两遍强夯置换与三次降水,最终达到软基处理目的。阐述了该技术工艺原理、工艺特点、工艺流程及施工工艺参数等;随后以具体工程实例为背景,详细介绍了该技术在具体工程中的应用情况,并依据原位试验及工后沉降监测对处理效果进行了反馈验证。In light of the limitations encountered with conventional methods for treating soft foundations,specifically pertaining to construction duration,costs,and environmental considerations when applied in extensive and deep soft foundation treatment projects like warehousing and logistics parks and industrial plants,the technology of soft foundation treatment by combining vacuum dewatering with dynamic compaction replacement was introduced in this paper.This innovative approach involves the sequential reduction of underground water levels and soil moisture content through vacuum dewatering,followed by the implementation of dynamic compaction replacement construction.The dewatering and dynamic compaction replacement procedures are executed alternately,culminating in a comprehensive soft foundation treatment achieved through two cycles of dynamic compaction replacement and three rounds of dewatering.The principles,characteristics,procedural flow,and construction process parameters of this technology are expounded upon.Subsequently,leveraging a specific project as a case study backdrop,we provide an exhaustive account of the practical application of this technology and validate its treatment efficacy through in-situ testing and post-construction settlement monitoring.

关 键 词：真空降水 强夯置换 软土地基 沉降监测 施工工艺 

分 类 号：TU472[建筑科学—结构工程]