关于红黏土先期固结压力的探讨  

On preconsolidation pressure of red clay

作　　者：廖义玲[1] 毕庆涛[1] 席先武 赵坤[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵阳550003 [2]贵州省喀斯特环境与地质灾害防治重点实验室,贵阳550003

出　　处：《岩土力学》2006年第11期1931-1934,共4页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.46302001);贵州省科学技术基金项目(No.[2001]3073)

摘　　要：土力学传统理论认为,土的先期固结压力受控于应力历史,与曾经受到的压力有关。然而,通过室内试验发现,红黏土这类区域性特殊土的先期固结压力所表现出的规律与传统理论相悖。研究表明,红黏土的先期固结压力主要受土的成因、结构和成分制约,上覆压力对其影响甚微。笔者分析了土力学传统观点在解释红黏土特性时存在的缺陷,探讨了红黏土先期固结压力的真正含义,提出了对红黏土先期固结压力的新认识。The traditional theory of soil mechanics considered that the preconsolidation of soil was controlled by the pressure force and stress history, However, based on the experimental results, the rule of the preconsolidation of red clay that is territorial peculiar soil is different from the traditional theory. The studies show that, the preconsolidation of red clay is most constrained by soil genesis, structure and component, and is affected by the overlying pressure in little degree. Finally, the defect of traditional soil mechanical view on red clay is analyzed; and the genuine signification of preconsolidation pressure of red clay was studied; and the new understanding about the preconsolidation is presented.

关 键 词：红黏土 土力学 先期固结压力 压缩曲线 结构强度 

分 类 号：TU411[建筑科学—岩土工程]