全自动固结试验系统测定软土的次固结系数特性  

The coefficient of secondary consolidation of soft clay determined by full automatic consolidation test system

作　　者：冯蓓蕾 钮建定 杨秋芳 

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海201612

出　　处：《工程勘察》2011年第3期11-14,共4页Geotechnical Investigation & Surveying

摘　　要：次固结系数是反映软粘土在恒载下随时间的增长而变形的一个重要特征指数。目前国内缺乏测试次固结系数的有效手段和方法,国家标准《土工试验方法标准》和其它地方、行业规范中都没有次固结系数测试的明确方法和要求。本文根据次固结系数定义及土工试验国标中测定沉降速率的要求,利用全自动固结试验系统测定各类软土在各级压力下土的次固结系数,分析研究其与荷载、土颗粒组成等因素变化的关系,建立不同土层次固结系数和压力的相关方程式。Coefficient of secondary consolidation reflects the soft clay under constant load with time in the growth of an important feature of the deformation index.Currently,the lack of effective testing means and methods of secondary consolidation coefficient,the national standard＂Standard for soil test method＂and elsewhere,industry standards are not clear to secondary consolidation coefficient test methods and requirements.This paper presents the results of secondary consolidation tests of different soft clay under different stresses using full automatic consolidation test system.The relationship of the consolidation of secondary coefficient with loading,soil particle components,and other factors are studied.The equations are established to assess relationship between the secondary consolidation coefficient and the stress.

关 键 词：软土 压力 粘粒含量 次固结系数 

分 类 号：U652.2[交通运输工程—港口、海岸及近海工程]