摘要
利用可靠度理论,结合工程实例,对加筋土路堤整体稳定可靠指标进行分析。认为设计参数均值与变异性对加筋土路堤整体稳定都有不同程度的影响;当设计参数数量有限而无法准确确定其所服从的概率模型时,建议假定填土的重度服从极I型分布,而粘聚力、内摩擦角和筋材拉力服从正态分布,所得到的结果偏于安全;另外对筋材层数、间距和整体稳定计算模式与加筋土路堤整体稳定的可靠指标之间的关系进行了探讨,所得出的结论可为加筋土路堤设计提供参考。
The paper analyzes reliability index of integral stability of reinforcement embankment with reliability theory based on engineering examples. The calculations preliminarily indicate that the average of design parameters and the coefficient of variability may have different degrees of impacts on integral stability of reinforcement embankment. And when it can not be integral precisely determined whether design parameters are obey with probability model or not because its amount is limited, it is suggested that if unit weight of the fill obey the extremal type Ⅰ largest, cesion, angle of internal friction and tensile force obey normal distribution, then the results are safety. Finally, the relationships among reliability index, the layer number of geosynthetics, the space of geosynthetics and calculation model are discussed. And the conclusions will provide the reference for design of reinforced embankment.
出处
《勘察科学技术》
2007年第2期7-10,共4页
Site Investigation Science and Technology
基金
交通部西部交通建设科技项目"加筋土路基力学行为与设计方法的研究(200431800006)。"
关键词
加筋土路堤
整体稳定
可靠指标
蒙特卡罗法
reinforced embankment
integral stability
reliability index
Monte-Carlo method
