滑坡灾害孕育—激发过程中的水-岩相互作用  

Water-rock interaction in process of landslide preparing and triggering

作　　者：徐则民[1] 黄润秋[2] 范柱国[1] 

机构地区：[1]昆明理工大学土木系,云南昆明650224 [2]成都理工大学工程地质研究所,四川成都610059

出　　处：《自然灾害学报》2005年第1期1-9,共9页Journal of Natural Disasters

基　　金：国家自然科学基金资助重大研究计划项目(90102002);国家自然科学基金资助项目 (40272119 );云南省自然科学基金资助项目(2001E0001G)

摘　　要：降雨造成的地下水与斜坡岩土体之间的复杂作用———水 -岩相互作用不仅是滑坡灾害的主要激发因素,它在滑坡孕育过程中也发挥着重要作用。以往的相关研究主要集中在与滑坡激发有关的空隙水压力、基于空隙水压力效应的滑坡临界降雨量、地下水富集斜坡的稳定性评价、水 -力耦合及地下水对岩石的软化效应等方面。孕育过程在滑坡研究中居于重要的基础性地位。以流-固耦合等理论为基础对岩体进行时效变形预测,对于斜坡演化研究是重要的,但是,由于大多数滑坡的孕育都是在近地表的侵蚀性地球化学环境中进行的,与深埋地下空间的开挖问题存在明显区别。作为水 -岩相互作用主要类型之一的水-岩化学作用是造成这种差别的主要因素。深入开展滑坡灾害孕育过程中的水-岩化学作用研究不仅对斜坡维护、加固及滑坡预报是重要的,而且可以促进水-力双重耦合、水-热-力及水-热-力-化学多重耦合等复杂理论的发展。The complicated action between groundwater stemming from rainfall and rockmass of slopes is the main triggering factor of landslide hazard events, at the same time it plays an important role in the preparation (pregnant) process of landslides. The previously related researches are mainly focused on pore water pressure, landslide-triggering rainfall thresholds, stability analysis of slopes enriched with groundwater, hydro-mechanical coupling, softening effect of groundwater on rock and so on, most of which are have direct relationships with landslide trigger process. Preparation process has a significant position in landslide researches. Time-dependent deformation prediction based on hydro-mechanical coupling theory is important to slope evolution research. However, because preparation processes of most of landslides take place in erodent geochemical environment near the earth surface, slope rockmass deformation differs from the time-dependent response of the underground openings wall rock to excavation. The difference is brought on mainly by chemical water-rock interaction(CWRI). The study on the CWRI in respect of preparation processes of landslides are important to landslide repair and forecast, at the same time it will promote the development of hydro-mechanical coupling, hydro-thermo-mechanical coupling and hydro-thermo-mechanical-chemical coupling theories.

关 键 词：滑坡 孕育过程 激发过程 水-岩相互作用 

分 类 号：P642.22[天文地球—工程地质学]