公路高切坡分类及其破坏模式

目前,公路高切坡缺乏一个统一的分类,从而造成其破坏模式分析混乱,降低了公路高切坡治理的针对性和有效性.因此,根据岩体结构面的控制性及现场易识性原则,将公路高切坡分成3大类9小类.依据岩性及其组合、岩体结构、岩体强度、结构面间距、走向与边坡走向的关系、结构面倾角与坡角的关系等各种不同组合情况具体分析了公路高切坡可能破坏的具体模式.在此基础上,提出了楔形体-平面滑动破坏模式、崩塌-滑动破坏模式、滑动-拉裂型破坏模式及滑动-压裂型破坏模式等4种复合破坏模式,对高切坡的稳定性分析及潜在破坏面的识别具有指导意义.

Classification of High-Cutting Slope along Road and Its Failure Models

At present,there isn't a uniform classification on the high-cutting slope along road.Therefore,this induces confusion in analyzing its failure models and reduces the pertinence and validity in governing the high-cutting slope along road.According to control of rock fissure and easy identification in-situ,the authors classfied high-cutting slope along road as three big kinds and nine small kinds,and analysed the possible failure models of every kind of high-cutting slope by lithology and its combination,rock fabric,rock intension,space between fissures,the relationship of fissures' and slopes' tend,the relationship of fissures' and slope's obliquity etc. Then four complex failure models of high-cutting slope are given: cuniform body-plane slide failure model,collapse-slide failure model,slide-ripping failure model,slide-crushing failure model.These provide directions on stability analysis and recognizing of its failure fissures.