胡小波,王海燕.南亚抗震不利地段海陆交互复杂互层地基加固性能研究[J].水运工程,2024,(3):165-170
南亚抗震不利地段海陆交互复杂互层地基加固性能研究
Reinforce performance of complex interlayer foundation with sea-land interaction in disadvantageous seismic regions of South Asia
  
DOI:
中文关键词:  海陆交互沉积  复杂互层地基  砂土液化  沉降特性
英文关键词:sea-land interaction sedimentation  complex interlayer foundation  sand liquefaction  settlement characteristics
基金项目:
作者单位
胡小波 中交上海三航科学研究院有限公司上海 200032 
王海燕 中交上海三航科学研究院有限公司上海 200032 
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中文摘要:
      针对孟加拉国某港口工程海陆交互相复杂互层地基加固中遇到的地层特性复杂、加固效果难以预测以及软黏土和粉细砂互层土场地地震液化的问题,结合场地地质条件、使用功能、工程特点等,对插板预压联合降水强夯在该场地条件下的加固效果展开研究。依托项目试验区块,通过对加固前后土体物理力学指标的对比分析和沉降-时程曲线、孔隙水压力-时程消散曲线等的研究,得到插板预压联合降水强夯加固的过程特性以及对原状土和吹填土的加固效果。研究表明,插板预压联合降水强夯法对于复杂互层土上吹填砂场地具有较好的适应性,加固效果可满足设计承载力和工后沉降控制要求,该法对于减轻砂土层的液化具有一定的作用。研究成果对于南亚地区复杂互层土吹填场地设计具有指导意义。
英文摘要:
      This article focuses on the complex geological characteristics encountered in the reinforcement of the complex interlayer foundation between land and sea in a port project in Bangladesh,which makes it difficult to predict the reinforcement effect,as well as the problem of seismic liquefaction in the soft clay and fine sand interlayer soil site.Based on the geological conditions of the project site,functional requirements for site use,engineering characteristics and other conditions,the reinforcement effect of the combination of plate pre compression and precipitation dynamic compaction under the site conditions is studied.Based on the experimental block of the project,by comparing and analyzing the physical and mechanical indicators of the soil before and after reinforcement,and studying the settlement time history curve,pore water pressure time history dissipation curve,etc.,the process characteristics of inserting plate preloading combined with precipitation dynamic compaction reinforcement and the reinforcement effect on the original soil and hydraulic fill soil are obtained.The results show that the combination of plate precompression and precipitation dynamic compaction method has good adaptability for complex interlayer soil filling sand sites,and the reinforcement effect can meet the design bearing capacity and post construction settlement control requirements.This method has a certain effect on reducing the liquefaction of sand layers.The research results have certain guiding significance for guiding the design of complex interlayer soil reclamation sites in South Asia
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