| 考虑测量误差的路堤工程位移反分析 |
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| 引用本文： | 陈建峰,柳军修.考虑测量误差的路堤工程位移反分析[J].低温建筑技术,2010,32(9):81-83. |
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| 作者姓名： | 陈建峰 柳军修 |
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| 作者单位： | 1. 同济大学地下建筑与工程系,上海,200092;同济大学岩土及地下工程教育部重点实验室,上海,200092
2. 同济大学地下建筑与工程系,上海,200092 |
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| 基金项目： | 上海市重点学科建设项目资助 |
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| 摘 要： | 由于测量误差的存在,使反分析参数的可靠性降低。本文分析了路堤工程测量误差的来源以及确定方法,以及采用极大似然法导出了包含协方差矩阵的最小化目标函数表达式,并推导了测斜仪的协方差矩阵。将最小化目标函数值作为遗传算法的适应度值可以优化土性参数。给出一个实例,得出考虑测斜仪误差比未考虑测斜仪误差的计算结果更符合实际情况。
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| 关 键 词： | 路堤 测量误差 反分析 优化算法 |
BACK-ANALYSIS OF DISPLACEMENTS IN EMBANKMENT CONSTRUCTIONS CONSIDERING MEASURING ERRORS |
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| CHEN Jian-feng,LIU Jun-xiu.BACK-ANALYSIS OF DISPLACEMENTS IN EMBANKMENT CONSTRUCTIONS CONSIDERING MEASURING ERRORS[J].Low Temperature Architecture Technology,2010,32(9):81-83. |
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| Authors: | CHEN Jian-feng LIU Jun-xiu |
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| Affiliation: | 1. Department of Geotechnical Engineering, Tongii University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China) |
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| Abstract: | Because of the measuring errors, the soil parameters that are back analyzed by the meas uring values are sometimes unreliable. This paper analyzes all sorts of the measuring errors in an embankment project, and discusses how to determine these errors. A minimum objective function including covariance matrix is derived by the maximum likelihood method. The soil parameters can be back analyzed when the minimum objective function becomes the fitness function of Genetic Algorithm. By analyzing an embankment, the results considering the measuring errors of inclinometer are more reliable than those didn＇t considering the errors. |
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| Keywords: | embankment measuring errors back analysis ： ootimum algorithm |
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