斜坡水-岩化学作用问题

SOME PROBLEMS ON CHEMICAL WATER-ROCK INTERACTION IN SLOPES

在滑坡发育的温湿气候地区,水-岩化学作用(CWRI)普遍存在于陆源碎屑岩、碳酸盐岩及浅变质岩等构成的各类斜坡岩体中。CWRI的累积效应在引起介质损伤渐进性加剧的同时,矿物、岩石及岩体结构、变形行为、强度及水力学特性等也将随之发生多方面的深刻变化;CWRI对滑坡孕育的贡献是显著的;在许多情况下,它是暴雨(地震)得以诱发滑坡的重要基础。尽管斜坡CWRI已经引起部分学者的关注并已在某些方面取得一定进展,但对它的认识程度依然是较低的。需要进一步研究的问题包括CWRI过程的水量供给、空间域及其扩展的结构与组分控制机理、低渗透岩块中地下水及化学组分的贮存运移规律、液相组分增量的矿物来源与差异贡献、斜坡岩土体对CWRI的综合时效响应及其对后续CWRI规模与进程的反向驱动等。

In humid-tropical and landslide-prone regions,chemical water-rock interaction (CWRI) takes place in various slopes made up of different bedrocks. CWRI can give rise to the progressive aggravation of different initial damages in slopes and the structure,and the mechanical and hydraulic characteristics of mineral,rock and rockmass will all change with CWRI progress. Under many cases,CWRI is the important basis for rainfall or earthquake to trigger landslide events. Despite some attention received and preliminary improvements,the fundamental mechanisms of CWRI have yet to be established. A thorough understanding of CWRI will contribute to landslide mitigation and prediction. The problems necessary to study further include CWRI space,mechanism of water supplying and chemical-mineral relation of CWRI process,the transport theories of water and aqueous matter in low permeable rock,CWRI space spreading,the contribution to landslide preparation process,and so on.