论文部分内容阅读
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。
In foundation pit engineering, the selection of m value directly affects the displacement and internal force of the retaining structure. However, in the design process of foundation pit, the value of m is mainly selected by empirical formula. Combined with uniform test and ACE non-parametric regression to construct efficient response surface, Monte Carlo simulation technique is used to enumerate a large number of m-value parameters. Taking the measured displacement data under different conditions as the constraint conditions, the tolerance range is set, and the real value is further approximated by gradually increasing the screening condition and gradually narrowing the tolerance range to repeat the screening. Through an example analysis and verification of a practical foundation pit project, the results show that the method is effective and feasible.