侧限条件下加筋对土体沉降的影响
摘要:针对侧限条件下加筋对土体沉降的影响问题，开展离心模型试验，设置三组对比试验，即在试验土体中未铺设筋材、铺设竖向间距分别为5 cm和3 cm间距的筋材，记录土体中典型点沉降量。试验发现典型点沉降随加速度增加而增加，未铺设筋材、铺设5 cm间距筋材及铺设3 cm间距筋材的土体沉降量依次降低。表明侧限情况下加筋也能够减小土体沉降，而且加筋间距越小，控制土体沉降效果越显著。侧限情况下筋材仍能起作用可能与土体变形不均有关。这种发现有利于深入理解加筋的作用机理。
Abstract:Centrifugal model tests were conducted to investigate the influence of the reinforcement on soil settlement under confined conditions.Three tests were carried out.One has no reinforcement,the other two were reinforced with reinforcement(vertical)spacing of 5 cm and 3cm,respectively.The settlements of typical points ware recorded during the test.Results shows that settlements of the typical point increase with the increase of acceleration.The soil settlements without reinforcement,with 5cm spacing reinforcement and 3cm spacing reinforcement successively reduce,indicating that under confined conditions the reinforcement can still decrease the soil settlement.The smaller the reinforcement spacing,the better effect it can bring.The reason may likely lie in the facts that the soil displacement is uneven during the process of deformation.The study is helpful to understand comprehensively the mechanism of reinforced soil.
中文标题：
侧限条件下加筋对土体沉降的影响
Reinforcement on Soil Settlement Under Confined Conditions
作者：
傅志斌1,2,刘志华3,介玉新3
Fu Zhibin1,2,Liu Zhihua3,Jie Yuxin3
作者简介:傅志斌，男，1973年生，正高级工程师，主要从事工程勘察、岩土设计治理咨询等工作。E-mail：fuzb@cigis.com.cn
通讯地址：
1. 中国地质大学(武汉), 湖北武汉 430074; 2. 建设综合勘察研究设计院有限公司, 北京 100007; 3. 水沙科学与水利水电工程国家重点实验室(清华大学), 北京 100084
1.ChinaUniversityofGeosciences,Wuhan430074,Hubei,China; 2.ChinaInstituteofGeotechnicalInvestigationandSurveyingLtd.,Beijing100007,China; 3.StateKeyLaboratoryofHydroscienceandEngineering,TsinghuaUniversity,Beijing100084,China
中图分类号:TU43
doi:10.3969/j.issn.1007-2993.2019.04.013
出版物：岩土工程技术
收稿日期:2019-05-13
关键词:加筋土,离心模型试验,侧限状态,土体沉降,筋材间距
Key words:reinforced soil,centrifugal model test,confined condition,soil settlement,reinforcement spacing
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基金项目：
基金项目: 十三五国家重点研发计划（2017YFC0404802）；科技部科研院所基金项目（NCSTE-2007-JKZX-261）；住建部科技项目（2018-K5-005）；北京市百千万人才工程项目（2017A30）
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