基于D-S证据理论的黄土滑坡参数估计及应用
首发时间:2014-04-25
摘要:岩土参数的不确定性是客观存在的,这种不确定性的存在,降低了稳定性评价的可靠性,对工程安全、优化设计等方面有重要影响。而D-S证据理论提供了一种解决不确定信息的有效方法,证据理论能够对各自独立的证据加以综合给出一致性结果,并能处理具有模糊和不确定信息的合成问题,可以达到信息互补。结合实际黄土滑坡的滑带土力学参数试验结果,基于D-S证据理论,构造了滑带土力学参数的识别框架、基本可信度分配,从主观和客观上对滑带土力学参数取值进行信度估计,滑坡滑带土力学参数信度估计值与滑带土强度参数反分析结果相吻合,证明了基于D-S证据理论的黄土滑坡参数估计的有效性,可靠性。
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Research on D-S theory-based Estimation of parameters and its application in loess landslide
Abstract:The uncertainty of geotechnical parameters exists objectively, which reduces the reliability of stability evaluation and has an important influence on the engineering safety, engineering design optimization and so on. The D-S evidence theory, which provides a efficient method to solve uncertain information, can synthesize independent evidence and provide consistent results,in addition,it also deals with synthesis problems of fuzzy and uncertain information in order to achieve complementary information. Combined with the actual mechanical parameters of slip soil of loess landslide by tests, D-S evidence theory was adopted to establish the discernment frame of the mechanical parameters and basic probability assignments. The estimation of the slip soil mechanics parameters is determined subjectively and objectively. Finally, The parameters coincided with the back analysis of the slip soil mechanics parameters , which provide a reliable and accurate proof for the D-S evidence theory.
Keywords: D-S evidence theory uncertainty loess landslide mechanical parameter
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