基于逐个修正法的滑带土参数取值优化

发布时间：2018-07-07 23:10

本文选题：滑带土 + 强度参数　；参考：《南水北调与水利科技》2017年02期

【摘要】：滑带土强度参数是滑坡评价及治理工程设计的关键参数。较为常见的取值方法是剖面反演,单剖面反演的结果为参数的多种组合,然而两个以上剖面反演则存在数学上超定问题,不存在唯一的解。基于最优化理论与方法,重点讨论了多剖面反演参数方程组出现超定问题时,将逆问题转化为正问题,构造目标函数,利用逐个修正法间接反演参数,获得最优的参数取值。实现得到综合反映滑带土特点并适用于各个剖面的强度参数的目标。以黄角树滑坡为例,结合室内试验和反演分析结果,确定参数取值范围,用逐个修正法对参数取值进行优化,得到的优化参数为c=9.76kPa,φ=6.81°,验证各剖面均与变形状态相符合。对滑坡防治工程中的滑带土参数取值问题具有一定借鉴意义。但该方法并不适用所有情况,仅在必须要获得一组综合参数的情况下,具有一定的合理性。
[Abstract]:The strength parameter of sliding zone soil is the key parameter of landslide evaluation and engineering design. The more common method is section inversion, the result of single section inversion is a combination of parameters, but more than two sections inversion has the problem of mathematical overdetermination, and there is no unique solution. Based on the optimization theory and method, this paper mainly discusses the problem of overdetermination of the multi-section inversion parameter equations, the inverse problem is transformed into a positive problem, the objective function is constructed, and the optimal parameter values are obtained by indirect inversion of the parameters one by one. The objective of synthetically reflecting the characteristics of sliding zone soil and applying to the strength parameters of each section is achieved. Taking Huangjiaoshu landslide as an example, combining the results of laboratory test and inversion analysis, the range of parameter values is determined, and the parameter values are optimized by the method of correction one by one. The optimized parameters are cn9.76kPaand 蠁 6.81 掳, which verify that each profile is in accordance with the deformation state. It can be used for reference in landslide prevention and control project. However, this method is not applicable to all cases and is reasonable only if a set of synthetic parameters must be obtained.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;北京航空航天大学计算机学院;四川省水利水电勘测设计研究院;
【基金】：地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2012K032)~~
【分类号】：P642.22

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