岩土力学2017，Vol.38Issue(11)：3231-3239,9.DOI:10.16285/j.rsm.2017.11.019
红层软岩遇水崩解特性试验及其界面模型
Experimental study of disintegration characteristics of red-bed soft rock within water and its interface model
摘要
Abstract
Disintegration of soft rock within water is considered as a fatal factor causing the engineering disasters.It is widely accepted that the disintegration results of soft rock from the variation of the microstructure of soft rock within the water.However,only a few studies were carried out to quantitatively describe soft rock disintegration,based on its meso-mechanism.We conducted experiments on the static disintegration of soft rock and immersion tests of soft rock debris in the laboratory.Besides,the compositions of soft rock at different soaking stages were analyzed by scanning electron microscopic as well.Finally,this study revealed the microscopic evolution of the interface between water and soft rock,according to the obtained results.The disintegration mechanism of the red-layer soft rock was generally caused by the hydration,diffusion and loss of clay particles in the water-rock interface in the mud-filled area of the soft rock fragments.Then the related shale cementation was reduced,resulting in the decrease of cohesion between debris.The cohesion between fragments of soft rock decreased exponentially with time under hydrostatic action.On the basis of the above analysis,the loss of hydrated clay particles in soft rock and the cracking type of model Ⅱ between soft rock fragments were quantitatively identified by using the interface and colloid chemistry and fracture mechanics theory.The interfacial model of soft rock with water disintegration was established,and the disintegration process of soft rock was further demonstrated quantitatively.By comparing the obtained results,the flaking time of soft rock fragments calculated by the above model was similar to that observed in the experiment,which verified the rationality of the model.关键词
红层软岩/崩解特性/水-岩作用/界面模型Key words
red-bed soft rock/disintegration characteristic/water-rock interaction/interface model分类
建筑与水利引用本文复制引用
潘艺,刘镇,周翠英..红层软岩遇水崩解特性试验及其界面模型[J].岩土力学,2017,38(11):3231-3239,9.基金项目
国家自然科学基金重点项目(No.41530638) （No.41530638）
国家自然科学基金科学仪器基础研究专项(No.41227002) （No.41227002）
国家自然科学基金面上项目(No.41372302,No.41472257) （No.41372302,No.41472257）
国家重点研发计划专项项目(No.SQ2017YFSF060085).This work was supported by the National Natural Science Foundation of China (Key Program) (41530638),the Special Foundation for State Major Basic Research Program of China (41530638),the National Natural Science Foundation of China (General Program) (41372302,41472257) and the National Key Research and Development Program (SQ2017YFSF060085). （No.SQ2017YFSF060085）
