基于模糊综合评判及遗传算法的初始地应力场反演
|
摘要
自重场和构造场是形成初始地应力场的两个主要因素,而构造运动的作用形式、作用组合方式、作用方向和作用大小则是反演分析初始地应力场的关键。提出一种初始地应力场反演方法,建立各种可行方案的模糊评判库及隶属度函数,采用模糊评判的方法辨识初始地应力场构造运动作用形式、组合方式及作用方向,利用遗传算法反演出各系数,从而得到整个区域的初始地应力场。最后通过算例进行了验证分析,表明该方法的有效和可行性。
The initial in-situ geo-stress field is composed of the gravity field and the structural field.The form,combination,direction and magnitude of the structural motion actions are the key factors for inversion analysis of initial in-situ field.An inversion method of initial in-situ geo-stress field is proposed in this paper.Fuzzy evaluation database and fuzzy subordinate degree for each of the feasible options are established.A method of fuzzy evaluation is used to identify the forms,combination and direction of the structural motion actions of the initial geo-stress field,and the genetic algorithm is used to obtain the coefficients,thus the initial in-situ geo-stress field of the whole region is obtained.The case study results show that the method is very effective and feasible.
The initial in-situ geo-stress field is composed of the gravity field and the structural field.The form,combination,direction and magnitude of the structural motion actions are the key factors for inversion analysis of initial in-situ field.An inversion method of initial in-situ geo-stress field is proposed in this paper.Fuzzy evaluation database and fuzzy subordinate degree for each of the feasible options are established.A method of fuzzy evaluation is used to identify the forms,combination and direction of the structural motion actions of the initial geo-stress field,and the genetic algorithm is used to obtain the coefficients,thus the initial in-situ geo-stress field of the whole region is obtained.The case study results show that the method is very effective and feasible.
引文
[1]郭怀志,马启超,薛玺成,等.岩体初始应力场的分析方法[J].岩土工程学报,1983,5(3):64-75.
[2]杨林德.岩土工程问题的反演理论与工程实践[M].北京:科学出版社,1999.
[3]朱伯芳.岩体初始地应力反分析[J].水利学报,1994,(10):30-35.
[4]庞作会,陈文胜,邓建辉,等.复杂初始地应力场的反分析[J].岩土工程学报,1998,20(4):44-47.
[5]杨志法,熊顺成,王存玉,等.关于位移反分析的某些考虑[J].岩石力学与工程学报,1995,14(1):11-16.
[6]中国地震学会地震地质专业委员会.中国活动断裂[M].北京:地震出版社,1982.
[7]戚蓝.初始地应力场系统分析理论与研究[D].天津:天津大学,2002.
[8]Holland J H.Adaptation in natural and artificial system[M].The University of Michigan Press,1975,MIT press,1992.
[9]周明,孙树栋.遗传算法原理及应用[M].北京:国防工业出版社,1999.
[2]杨林德.岩土工程问题的反演理论与工程实践[M].北京:科学出版社,1999.
[3]朱伯芳.岩体初始地应力反分析[J].水利学报,1994,(10):30-35.
[4]庞作会,陈文胜,邓建辉,等.复杂初始地应力场的反分析[J].岩土工程学报,1998,20(4):44-47.
[5]杨志法,熊顺成,王存玉,等.关于位移反分析的某些考虑[J].岩石力学与工程学报,1995,14(1):11-16.
[6]中国地震学会地震地质专业委员会.中国活动断裂[M].北京:地震出版社,1982.
[7]戚蓝.初始地应力场系统分析理论与研究[D].天津:天津大学,2002.
[8]Holland J H.Adaptation in natural and artificial system[M].The University of Michigan Press,1975,MIT press,1992.
[9]周明,孙树栋.遗传算法原理及应用[M].北京:国防工业出版社,1999.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心