板裂介质理论在牟珠洞滑坡机理分析中的应用

来源期刊：中南大学学报(自然科学版)2006年第1期

论文作者：傅鹤林 周宁 罗强 郭建峰

文章页码：188 - 193

关键词：板裂介质;顺层滑坡;溃屈破坏

Key words：sheet crack theory; bedding landslide; creep collapse

摘    要：牟珠洞滑坡是困扰重庆至北海高速公路运营的一大安全隐患,牟珠洞滑坡为顺层溃屈滑坡,曾出现多次滑坡,几经整治,但仍未根治。为了确保再次整治取得良好效果,结合能量耗散机理,采用板裂介质力学计算模型,确定了顺层滑坡发生弯曲破坏的力学判据,并对该滑坡进行应用分析。分析结果表明:该滑坡岩体破坏的具体形式为岩梁弯曲折断,其中复杂的地质构造及较发育的地下水是产生该滑坡的主要因素;此外,边坡浅层岩体风化导致岩体强度降低,边坡岩体出现蠕变性也是影响边坡稳定性的重要因素。

Abstract: Mouzhudong landslide is a momentous safety problem that disturbs the highway use from Chongqing to Beihai. This landslide is bedding creep landslide. Landslide has occurred many times. This paper, according to the energy dissipation mechanism, adopted mechanical calculation model of sheet slope crack, established mechanical criterion by which bending failure appeared the bedding landslide, and carried through idiographic analyses of this landslide. The analysis results indicate that Mouzhudong landslide is a typical failure of rock beam bend. The complex geologic condition and enough groundwater are major factors. The superficial rock weathering in slope results in strength abasement and rock creeps are key factors that affect slope stability.