基床系数静载试验取值方法与应用
摘要:对具有完整加载段、不完整、不规则或缺乏明确临塑荷载的静载试验非线性p-s曲线,提出了估算其地基土层基床系数的方法。通过对非洲大陆4个工程项目静载试验的实例分析,说明对粉细砂土、碎石土层,曲线拟合估算的基床系数比静载试验测试点直接计算的数值低,比现有文献的参考数值高。基床系数对基础结构性状分析存在较大影响,利用静载试验方法估算基床系数对实际工程十分重要。
Abstract:This paper puts forward the methods of calculating modulus of subgrade reaction, based on static loading test which contains full load segments, incomplete, irregular, or lack of clear ultimate load curves. According to static load tests instance in 4 project testing in African continent, the modulus of subgrade reaction on silty sand soil, gravelly soil, testing result based on static loading test is higher than curve fitting, and lower than existing literature. The modulus of subgrade reaction has bigger influence on infrastructure character analysis, get modulus of subgrade reaction from static loading test was important in the actual projects.
中文标题:
基床系数静载试验取值方法与应用
Evaluating Coefficient of Subgrade Reaction by Statically Tests and Its Application
作者:
张武1,张波1,张少琴2
Zhang Wu1,Zhang Bo1,Zhang Shaoqin2
作者简介:张武,男,1963年生,湖北汉川人,博士,研究员,从事岩土工程实践与研究。E-mail:zhangwu422@163.com
通讯地址:
1. 中国建筑科学研究院, 北京 100013; 2. 湖北省地质勘察基础工程公司, 湖北武汉 430071
1.ChinaAcademyofBuildingResearch,Beijing100013,China; 2.GeologicalInvestigationandFoundationConstructionCompanyofHubeiProvince,Wuhan430071,Hubei,China
中图分类号:TU413.4
doi:10.3969/j.issn.1007-2993.2016.02.006
出版物:岩土工程技术
收稿日期:2015-10-29
关键词:基床系数,静载试验,数值拟合,临塑荷载,尺寸效应
Key words:coefficient of subgrade reaction,plate load test(PLA),numerical approximation,ultimate load,scale effect
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