基于ACE法的基坑土层m值反演

发布时间：2018-06-03 14:13

本文选题：基坑 + 均匀试验　；参考：《建筑结构》2016年24期

【摘要】：在基坑工程中,土层m值的选取直接影响支挡结构的位移和内力,但是目前在基坑设计过程中,m值主要是通过经验公式选取。结合均匀试验和ACE非参数回归构建高效的响应面,利用Monte Carlo模拟技术枚举出大量m值参数。以不同工况下的实测位移数据作为约束条件,设定容差范围,通过逐步增加筛分工况和逐步缩小容差范围来重复筛分,从而进一步逼近真实值。通过对某实际基坑工程进行算例分析及验证,结果表明该方法是有效可行的。
[Abstract]:In foundation pit engineering, the selection of soil layer m value directly affects the displacement and internal force of retaining structure, but at present in the foundation pit design process, m value is mainly selected by empirical formula. Combined with uniform test and ACE nonparametric regression, an efficient response surface was constructed, and a large number of m parameters were enumerated by Monte Carlo simulation technique. Taking the measured displacement data under different working conditions as the constraint condition, the tolerance range is set, and the range of tolerance is repeated by increasing the screening condition and gradually reducing the tolerance range, thus approaching the real value further. The results show that this method is effective and feasible through the analysis and verification of an actual foundation pit project.
【作者单位】：昆明理工大学建筑工程学院;
【基金】：国家自然科学基金青年基金项(No.51108217)
【分类号】：TU753

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