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加筋砂砾料残余变形特性研究

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Indexed by:期刊论文

Date of Publication:2009-10-25

Journal:水力发电学报

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:28

Issue:5

Page Number:158-162

ISSN No.:1003-1243

Key Words:岩土力学;残余变形;三轴试验;砂砾料

Abstract:在筑坝砂砾料三轴试样内水平铺设土工格栅,应用中型动三轴仪(试样尺寸φ200mm×500mm),研究了加筋(土工格栅)后砂砾料残余变形与振动次数的关系,并与不加筋的砂砾料残余变形特性进行了对比.在此基础上,采用改进的沈珠江模型分别拟合了加筋前后砂砾料的残余变形试验结果.研究表明:加筋可抑制砂砾料的残余剪切变形和残余体积变形.加筋前后的砂砾料永久变形特性均可采用改进的沈珠江模型描述,加筋后的模型参数明显降低.

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