深基坑“空间效应”不同二次加固方式有限元分析
摘要:应用有限元模拟分析的方法,以云南昆明某典型深基坑地层条件为基础,对基坑长边"空间效应"两种不同加固方式进行了研究。研究成果表明:①采用基坑中部一段二次加固方案,当二次加固范围大于0.54 l(l为基坑侧壁长度)时,基坑侧壁水平位移不再增加;②采用基坑中部两段二次加固方案,当二次加固范围大于0.18 l时,基坑侧壁水平位移不再增加;③基坑中部两段二次加固方案在经济和加固效果上优于一段二次加固方案。研究成果对相关工程的设计和施工具有一定的借鉴意义。
Abstract:Through numerical simulation, the appropriate secondary reinforcement modes and reinforcement ranges have been studied in this paper based on the soil layer structure of a typical deep foundation pit in Kunming, Yunnan province. As shown by calculation, when the one section reinforcement scheme is adopted at the central of foundation, the horizontal dis placement of foundation pit wall scarcely increased after the secondary reinforcement range larger than 0.54l(l:the length of foundation pit sidewall), when the two section reinforcement scheme is adopted at the central of foundation, the horizontal dis placement of foundation pit wall scarcely increased after the secondary reinforcement range larger than 0.18l. The two section reinforcement scheme is superior to the one section reinforcement scheme on the cost and reinforcement effect. The results of this paper providing a reference to similar projects.
中文标题：
深基坑“空间效应”不同二次加固方式有限元分析
Finite Element Analysis of the Secondary Reinforcement Design of Deep Foundation Pit Based on the “Space Effect”
作者：
吕科验1,姚爱军2,张剑涛2
Lu Keyan1,Yao Aijun2,Zhang Jiantao2
作者简介:吕科验,男,1976年生,汉族,陕西兴平人,硕士研究生,高级工程师。E-mail:kizan21@163.com
通讯地址：
1. 中铁建设集团有限公司, 北京 100040; 2. 北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124
1.ChinaRailwayConstructionGroupCo.,Ltd,Beijing100040,China; 2.TheKeyLaboratoryofUrbanSecurityandDisasterEngineering,MinistryofEducation,BeijingUniversityofTechnology,Beijing100124,China
中图分类号:TU433
doi:10.3969/j.issn.1007-2993.2016.04.003
出版物：岩土工程技术
收稿日期:2016-05-06
关键词:深基坑支护,空间效应,二次加固,有限元
Key words:deep excavation support,space effect,secondary reinforcement,finite elements
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