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顺向边坡是工程中较常见的不稳定边坡,依据边坡赋存条件的不同,可以出现崩塌,滑动和隆胀破坏。崩塌破坏边坡常见于厚层块裂结构,滑动和隆胀在软硬相间的层状边坡中则较为常见。1 滑动破坏1.1 滑动条件:新鲜、干燥的层面间,粘滞力和抗剪强度值较高,被切脚的边坡岩体可维持相对稳定。遇水软化后,粘滞力和抗剪强度降低很快,特别是层面上含有泥膜或为薄层页岩时,饱和后粘滞力接近于0,降雨时或雨后,被切断坡脚的顺向边坡岩体极易垮塌。设计施工中切忌造成顺层陡倾边坡的切脚现
Forward slope is a common unstable slope in engineering. According to different occurrence conditions of slope, collapse, sliding and swelling can occur. Collapsing and sabotaging slopes are common in thick, massive structures, and sliding and bulging are more common in stratified slopes between soft and hard phases. Sliding failure 1.1 Sliding conditions: fresh, dry layer, the higher the value of the viscous force and the shear strength, the slope of the rock mass to be cut feet can be maintained relatively stable. When softened by water, the viscous force and shear strength decrease rapidly, especially when the muddy film or thin layer shale is on the surface, the viscous force after saturation is close to 0, and when the rain or rain falls, the cut foot The forward slope of rock easily collapse. Design and construction should not cause the sloping feet along the steep slopes