鄱阳湖软土物理性质试验研究与分析

Experimental Study and Analysis of the Physical Properties of Poyang Lake Soft Soils

近些年,随着经济与工程技术的飞速发展,软土地基上的桥梁等交通道路工程数量急剧增加,对软土地基处理的要求相应变得也越来越高。针对湖相软土的特殊性及工程项目的需要,通过现场取土开展了一系列室内土工试验对湖相软土进行物理工程性质研究,包括密度、含水率、比重、界限含水率以及渗透试验。实验结果表明,鄱阳湖软土为典型的湖相软土,该地区下卧有较深的淤泥质土,其具有较大的含水率、强度低、渗透性差等特点,研究为今后鄱阳湖软土地基处理以及工程参数取值提供了依据。最后还对鄱阳湖地区淤泥质土的物理性质间的相关性进行了分析。

In recent years,with the rapid development of economy and engineering technology,the number of highway transportation projects such as bridges on the soft soils has increased dramatically.The requirements for the soft soil treatment have also become more restrictive.In view of the particularity of the lacustrine soft soils and the demands from engineering projects,a series of geotechnical investigations were conducted on the lacustrine soft soils through the on-site soil testing,including density,moisture content,specific gravity,Atterberg Limits and permeability tests.The experimental results show that the Poyang Lake soft soil is a typical lacustrine soft soil.There exists a deep silty soil in this area,which has the characteristics of the large water content,low strength and poor permeability.The study results will be used for the future treatment of the Poyang Lake soft soils and for the value of the engineering parameters.Finally,the correlations among the physical properties of the silty soil in the Poyang Lake area are analyzed.