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一、绪言近年来,在野外地质调查过程中,我们经常在岩质斜坡上遇到一种由岩层滑移一弯曲变形的逐渐发展而导致的滑坡现象。这种滑坡与国外报导的弯曲型滑坡(Buckling)不同,在其发展过程中能形成连续而并不折断的强烈“褶曲”,通常不能用属弹性分析的欧拉方法来预测其产生条件。研究表明,这类斜坡变形破坏的发展与岩体的弹粘性性状密切相关。为阐明其形成机制,本文拟就黄河上游某拟建水库近坝地段的二个典型实例来加以讨论。
I. INTRODUCTION In recent years, during the field geological survey, we often encounter a kind of landslide caused by the gradual development of rock strata-bending deformation on the rock slope. This kind of landslide is different from the Buckling reported abroad. It can form a continuous “strong fold” in the process of its development without breaking. The Euler method of elasticity analysis can not usually predict the conditions of its occurrence. Research shows that the development of such slope deformation and failure is closely related to the elastic-viscous properties of rock mass. In order to elucidate the formation mechanism, this paper intends to discuss two typical examples of a dam near a proposed reservoir in the upper Yellow River.