近海洪冲积土界限含水率影响因素研究  

Study on Influencing Factors of Boundary Water Content for Offshore Allu-vial Soil

作　　者：唐建琼 钟贤勍 TANG Jian-qiong;ZHONG Xian-qing(Guangxi Guitong Engineering Consulting Co.,Ltd.,Nanning,Guangxi,530028;College of Civil Engineering and Architecture,Guangxi University,Nanning,Guangxi,530004)

机构地区：[1]广西桂通工程咨询有限公司,广西南宁530028 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《西部交通科技》2019年第2期7-11,共5页Western China Communications Science & Technology

摘　　要：界限含水率是土的基本物理特性指标之一,是土的工程性质分析的重要参考依据。针对目前规范试验中采用粒径<0.5mm的土进行液塑限试验的规定与土的分类中细粒土粒径划分标准不一的问题,文章通过分析广西北部湾近海洪冲积混合土的颗粒组成与界限含水率的关系,发现中间状态土(粒径在0.075~0.5mm)的粒径分布的波动性对土的液塑限大小具有重要的影响,并且可以通过分析中间状态土的颗粒变异性判断土的液塑限值的真实程度,为精确测定混合土的界限含水率提供参考依据。The boundary water content is one of the basic physical characteristics of soil,and it is an important reference basis for the engineering property analysis of soil.In view of the problem that the particle size dividing standard of fine-grained soil is different between the specifications of using the soil with particle size less than 0.5 mm for liquid-plastic limit test and the classification of soil in current standard test,this article analyzes the relationship between the particles composition and the boundary water content of offshore alluvial mixed soil in Guangxi Beibu Gulf,and finds the fluctuation of particle size distribution of intermediate state soil(particle size of 0.075~0.5 mm)has an important influence on the liquid plastic limit of the soil,and the true degree of liquid-plastic limit of the soil can be judged by analyzing the particle variation of intermediate state soil,which can provide the reference basis for accurately determining the boundary water content of mixed soil.

关 键 词：近海洪冲积混合土 界限含水率 中间状态土 液塑限试验 

分 类 号：U416.03[交通运输工程—道路与铁道工程]