基于正交数值试验法深厚软土区复合地基按沉降控制优化设计  

Settlement-based Optimization Design on Composite Foundation in Region with Deep Soft Soils by Orthogonal Numerical Tests

作　　者：陈昌富[1] 李欣[1] 毛凤山 CHEN Changfu;LI Xin;MAO Fengshan(Geotechnical Engineering Institute,Hunan University,Changsha,Hunan 410082,China)

机构地区：[1]湖南大学岩土工程研究所,湖南长沙410082

出　　处：《公路工程》2018年第2期49-53,107,共6页Highway Engineering

基　　金：国家重点研发计划(2016YFC0800203);国家自然科学基金资助项目(51278186)

摘　　要：基于正交试验设计方法,提出一种基于响应面沉降代理模型的深厚软土区水泥搅拌桩复合地基优化设计方法。该方法首先利用正交试验设计方法进行试验方案设计;再采用有限元方法进行复合地基沉降的计算,并通过响应面法建立复合地基的沉降代理模型;然后,以复合地基沉降为约束条件工程造价为目标函数建立复合地基优化设计数学模型。最后,基于粒子群算法对该数学模型进行全局寻优,并输出满足规范要求的最经济的深厚软土区水泥搅拌桩复合地基加固方案。On the basis of orthogonal tests design,an optimization design method of soil-cement columns supported composite foundation was proposed based on the response surface methodology.Firstly,the schemes of numerical tests were designed based on the orthogonal tests design.Secondly,settlements of the composite foundations were calculated using the finite element analysis,and the settlement’s surrogate models of composite foundations were established by response surface methodology.Then,the mathematical model of optimization design was established with the settlements of the composite foundations as controlled conditions and the engineering costs as the object functions.Finally,the global optimal of the mathematical models was searched out by the particle swarm optimization,and the most economical stabilizing layout of cement mixing pile composite foundation in the deep-thick soft clay area is exported,under the condition of the standard requirements.

关 键 词：复合地基 正交设计 有限元 响应面法 粒子群算法 

分 类 号：TU472.3[建筑科学—结构工程]