摘要
岩土工程中的各种信息都存在模糊性,通过对边坡稳定性分析中模糊因素的研究,提出了一种工程边坡模糊稳定性分析的新方法,建立了边坡稳定性分析的模糊数学模型,并给出了相应的求解方法。该模型可以考虑分析中所涉及到的计算力学参数的模糊性。在分析岩土力学参数试验资料的基础上,结合专家经验提出了岩土力学参数的隶属函数构造方法,利用统计资料构造了边坡稳定性评价的隶属函数,并提出了边坡稳定性评价的具体分类指标和模糊安全系数隶属度的计算方法。实例研究表明边坡稳定性模糊分析方法是一种更为合理的研究边坡稳定性的新方法。
Vague information widely exits in many aspects of the stability analysis of rock and soil slopes. By studying the vague factors in the slopes, a new approach is developed for the slope stability analysis using fuzzy sets,and a new fuzzy mathematical model is proposed to analyze the stability of slopes. In this model, the vague character of mechanical parameter,such as density, cohesion and frictional angle, is considered. For the convenience of computation, interval arithmetic is introduced to substitute fuzzy arithmetic. On the basis of the analysis of test data of rock and soil, a method to construct the membership functions is proposed according to the experience of specialist and a membership function for the evaluation of stability analysis of slopes is also constructed by use of statistical data. A new method used to evaluate membership degree of fuzzy safety coefficient and index for the evaluation of slope stability are also suggested in this paper. The case study indicates that fuzzy analysis method of slope stability is a more reasonable analysis method.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2003年第4期409-413,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目(50128908)
国家重点基础研究发展规划项目(973项目)(2002CB412707)
水利科技创新基金资助项目(SCX200055)
