滑坡灾害孕育-激发过程中的水-岩相互作用

降雨造成的地下水与斜城岩土体之间的复杂作用--水-岩相互作用不仅是滑城灾害的主要激发因素,它的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滑城激发有关的突隙水压力效应的滑城临界降雨量、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.孕育过程在滑城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,对于斜坡研究中居于重要的,但是,由于大多数滑城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.深入开展滑城灾害孕育过程中的水-岩化学作用研究不仅对斜城维护、加固及滑城预报是重要的，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.

Water-rock interaction in process of landslide preparing and triggering

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.