摘要
为研究天然边坡内土体岩性和湿度异质性对边坡稳定性的影响,首先解析了非均质边坡内土体湿度和强度的变异。之后,基于简布法构建考虑土体非均质性和土体强度水敏性耦合影响的边坡稳定性分析模型。最后对比分析了土体强度水敏性对均质/非均质边坡稳定性的影响。结果表明,受土体岩性和湿度双重因素影响,界面两侧土体的强度会发生变异;该变异导致了非均边坡内土体的重度、黏聚力和内摩擦角表现出明显的空间异质性;边坡的稳定性对边坡土体岩性和土体强度水敏性具有明显依赖性。在文中所设置的条件下,考虑土体强度水敏性的非均质边坡稳定性最好。
To study the influence of soil lithology and moisture heterogeneity on slope stability in natural slopes,the paper analyzes the variation of soil moisture and strength in heterogeneous slopes.Then,based on the simplified Bishop method,a slope stability analysis model considering the coupling effect of soil heterogeneity and soil strength water sensitivity is constructed.Finally,the influence of soil strength water sensitivity on the stability of homogeneous/heterogeneous slopes is compared and analyzed.The results show that the strength of soil on both sides of the interface varies due to the dual factors of soil lithology and moisture;this variation leads to obvious spatial heterogeneity of soil weight,cohesion and internal friction angle in heterogeneous slopes;slope stability has obvious dependence on slope soil lithology and soil strength water sensitivity.Under the conditions set in the paper,the stability of heterogeneous slopes considering soil strength water sensitivity is maximum stability.
作者
陈茜
Chen Xi(Shaanxi Water Resources&Hydropower Engineering Group Co.,Ltd.,Xi’an Shaanxi 710018,China)
出处
《山西建筑》
2023年第13期117-120,共4页
Shanxi Architecture
关键词
土体岩性
湿度
空间异质性
边坡稳定性
简布法
soil lithology
humidity
spatial heterogeneity
slope stability
Janbu method
