井点降水联合强夯法对周围环境的影响

Effect of well point dewatering combined with dynamic compaction on surrounding environment

井点降水联合强夯法是一种新型"静-动力"结合的排水固结软基处理技术,可适用于高地下水位条件下饱和淤泥质土快速加固。以广州港南沙港区粮食及通用码头工程软基处理试验区科研项目为背景,介绍该法的基本思想和工艺,并通过现场试验研究结合实时监测,重点从周边地下水位变化、地表沉降、深层水平位移发展及强夯振动加速度、速度衰减规律等方面较系统地考察对周围环境的影响,给出施工安全距离,为该法的进一步推广应用提供有益的参考。

Deep well dewatering combined with dynamic compaction is a new static-dynamic loading soft ground treatment technology developed on the basis of the static drainage consolidation method and dynamic compaction method,which is suitable for saturated muddy soil with a high groundwater level.Based on Guangzhou Nansha Harbor Grain and Universal Terminal Project Soft Foundation Improvement Test Area,this paper describes the basic idea of the method and construction technology.Based on the in-situ test and real-time monitoring,we work out the safety distance for construction by summarizing the influence on the surrounding environment caused by variation of ground water,ground settlement,deep horizontal displacement and by the acceleration,speed and displacement attenuation of the dynamic compaction.All the results are dedicated to the further industrial applications.