井点降水联合强夯法对周围环境的影响
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摘要
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.
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.
引文
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[3]刘嘉,罗彦,张功新,等.井点降水联合强夯法加固饱和淤泥质地基的试验研究[J].岩石力学与工程学报,2009,28(11):2222-2227.
[4]周健,曹宇,贾敏才,等.强夯-降水联合加固饱和软黏土地基试验研究[J].岩土力学,2003,24(3):376-380.
[5]周健,张健,姚浩.真空降水联合强夯法在软弱路基处理中的应用研究[J].岩土力学,2005,26(S1):198-200.
[6]周健,姚浩,贾敏才.大面积软弱地基浅层处理技术研究[J].岩土力学,2005,26(10):1685-1688.
[7]Shi Dan-da,Zhou Jian,Liu Wen-bai,et al.In-situ test research on vacuum dynamic consolidation method to improve double-layered soft ground[C]//Proceedings of the18th International Offshore and Polar Engineering Conference,2008:791-796.
[8]周健,崔积弘,贾敏才,等.吹填细砂软弱地基处理试验研究[J].岩土力学,2008,29(4):859-864.
[9]张丽娟,李彰明,韩江.动静力排水固结法在淤泥质地基处理工程中的应用[J].岩土力学,2009,30(2):567-571.
[10]Chen Fu-g,Tseng Tzu-jung,Chen Jing-wen.A case study and new concept of soil improvement techniques on reclaimed land[C]//Proceedings of the17th International Offshore and Polar Engineering Conference,2007:1282-1286.
[11]Chen Jing-wen,Chen Fu-cheng,Lu Chun-wei.The experimental study on effectiveness of water levels for dynamic impacts on reclaimed soils[C]//Proceedings of the18th International Offshore and Polar Engineering Conference,2008:625-630.
[12]蒋鹏,李荣强,孔德坊.强夯振动影响的数值分析[J].地下空间,2001,21(5):544-548.
[13]蒋维强,欧阳立胜.强夯地震效应特征研究[J].防震减灾工程学报,2005,25(1):45-48.
[14]范维恒.强夯法加固地基的原理与应用[M].太原:太原工业大学,1985.
[15]方磊,经绯,刘松玉.强夯振动影响与构筑物安全距离研究[J].东南大学学报:自然科学版,2001,31(3):1-4.
[16]GB50011—2001建筑抗震设计规范[S].
[17]任书考.强夯振动测试与资料分析研究[J].工程勘察,1983(4):1-5.
[18]吴绵拔,李俊如.强夯对环境的振动影响研究[J].土工基础,1992,6(2):13-18.
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