南水北调与水利科技2017，Vol.15Issue(2)：170-175,6.DOI:10.13476/j.cnki.nsbdqk.2017.02.026
基于逐个修正法的滑带土参数取值优化
Landslide soil parameters optimization based on one-by-one correction method
摘要
Abstract
Landslide soil strength parameters are the key parameters in the landslide evaluation and management engineering design.Currently a common value-selection method is profile inversion.The result of single profile inversion is multiple combinations of parameters.The inversion of two or more profiles would present a mathematically overdetermined problem with no unique solution.Based on the optimization theory and method,when the equation set of multi-profile inversion parameters had an overdetermined problem,this paper transformed the inverse problem into a direct problem,constructed an objective function,indirectly inversed the parameters using the one-by-one correction method,and obtained the optimal values of the parameters.Thus,it obtained the strength parameters that reflected the characteristics of sliding soil and were suitable for each profile.In this paper,with Huangjiaoshu landslide as an example,we combined the results of indoor experiments and inversion analysis to determine the range of parameters values,and used one-by-one correction method to optimize parameters values.The optimized parameters were c=9.76 kPa,φ=6.81°,and they tallied with the deformation state when verified with each profile.This paper can provide reference for landslide soil parameters values selection in landslide prevention engineering.But the method does not apply to all cases;it is only feasible when a set of comprehensive parameters are needed.关键词
滑带土/强度参数/逐个修正法/优化Key words
landslide soil/strength parameters/one-by-one correction method/optimization分类
建筑与水利引用本文复制引用
李子隆,许模,郭健,徐晨梓,赵勇..基于逐个修正法的滑带土参数取值优化[J].南水北调与水利科技,2017,15(2):170-175,6.基金项目
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) （SKLGP2012K032）
Geological Disaster Prevention and Environmental Protection Foundation of State Key Laboratory(SKLGP2012K032) （SKLGP2012K032）
