物化型软岩微结构单元特征及其胀缩性研究  

STUDY ON MICROSTRUCTURE UNIT CHARACTER AND ITS SWELL-SHRINK PROPERTY FOR PHYSICO-CHEMICAL SOFT ROCK

作　　者：柴肇云[1] 康天合[1] 李义宝[1] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024

出　　处：《岩石力学与工程学报》2006年第6期1265-1269,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50474057)

摘　　要：在对物化型软岩的物质组成、矿物结构及其失水–吸水过程的物理力学机制研究的基础上,提出物化型软岩由硬质砂粒–黏土矿物叠层构成的四面体微结构单元的胀缩几何模型,建立相应的胀缩几何方程。所建立的胀缩方程为定量进行软岩胀缩性能的研究提供理论基础,但这个胀缩方程的具体应用还有待于对各类软岩的成分组成、各类黏土矿物的结构特征以及胀缩性能参数等进行进一步的定量研究。The physicochemical soft rock is a rock containing a great amount of clay minerals. Under engineering disturbance conditions, it is easy to swell and shrink by wetting and drying and to reduce rapidly its engineering properties. It is one of the biggest rock mechanics problems in geotechnical engineering. Because the physicochemical soft rock is of such physical and mechanical properties as hydrate swelling, strength dropping down and softening break etc.; it has brought a great influence on the stability of many important projects. Based on the analysis of the composition of the physicochemical soft rock, the microstructure shape change and swell-shrink mechanism in the drying-wetting process of the clay minerals, the swell-shrink geometrical model and its corresponding equation of the tetrahedral microstructure unit consisting of hard sand and clay minerals tactic strata in the physicochemical soft rock are put forward. This equation offers a theoretical foundation for the quantitative research of the swell-shrink property of soft rock. But it is necessary to do further study in the composition, mineral microstructure and mineral swell-shrink parameters etc. for its application in practice.

关 键 词：岩石力学 物化型软岩 黏土矿物 单元模型 胀缩方程 

分 类 号：TU457[建筑科学—岩土工程]