高强土工格室加筋砂土性状的三轴试验

doi:10.12066/j.issn.1007-2861.1721

上海大学学报(自然科学版) ›› 2017, Vol. 23 ›› Issue (4): 590-599.doi: 10.12066/j.issn.1007-2861.1721

高强土工格室加筋砂土性状的三轴试验

彭艾鑫, 张孟喜, 朱华超

上海大学土木工程系, 上海 200444

收稿日期:2015-09-09 出版日期:2017-08-30 发布日期:2017-08-30
通讯作者: 张孟喜(1963—), 男, 教授, 博士生导师, 博士, 研究方向为新型土工加筋技术及地下结构. E-mail: mxzhang@i.shu.edu.cn
作者简介:张孟喜(1963—), 男, 教授, 博士生导师, 博士, 研究方向为新型土工加筋技术及地下结构. E-mail: mxzhang@i.shu.edu.cn
基金资助:
国家自然科学基金资助项目(41372280)

Triaxial test of high strength geocell reinforced soil

PENG Aixin, ZHANG Mengxi, ZHU Huachao

Deptartment of Civil Engineering, Shanghai University, Shanghai 200444, China

Received:2015-09-09 Online:2017-08-30 Published:2017-08-30

摘要/Abstract

摘要：

通过三轴试验方法研究了高强土工格室加筋土的强度及其变形破坏特性, 探论了在不同加筋情况下, 土工格室加筋土强度影响因素及其变化规律, 分析了在筋材用量相同的情况下, 如何选择更合理、更经济的加筋形式. 试验结果表明: 加筋后土体的强度和抵抗变形的能力明显增强; 在围压一定的情况下, 格室高度的提升对加筋土强度的提升程度远远大于节点间距减小的影响; 在筋材用量相同时, 选择格室高度高但是相对层数少的加筋方式更合理; 对加筋效果系数和强度参数分析发现, 随着围压的增加, 加筋效果系数降低, 土工格室加筋有助于提高土体的黏聚力和增大内摩擦角, 其中黏聚力的提高更显著.

关键词: 高强土工格室, 加筋土, 筋材用量, 三轴试验

Abstract:

Strength and deformation characteristics of geocell reinforced soil were studied in a triaxial test. Factors that affected strength and their variation pattern were investigated under different reinforcement conditions. With the same amount of reinforcement, choice of reasonable and economical reinforcement forms was analyzed. The following results are obtained. Strength and anti-deformation capacity of the soil are clearly intensified with reinforcement. Strength is far more improved by increasing the height of geocell than reducing the node spacing when the confining pressure is constant. With the same amount of reinforcement, using large cell height and low reinforced layers is more reasonable. Analysis of the reinforcement effect coefficient and strength shows that the coefficient is reduced with the increasing of confining pressure. Cohesive strength and angle of internal friction of the soil are improved by geocell reinforcement. The improvement of cohesive strength is more significant.

Key words: amount of reinforcement material, high strength geocell, reinforced soil, triaxial test

彭艾鑫, 张孟喜, 朱华超. 高强土工格室加筋砂土性状的三轴试验[J]. 上海大学学报(自然科学版), 2017, 23(4): 590-599.

PENG Aixin, ZHANG Mengxi, ZHU Huachao. Triaxial test of high strength geocell reinforced soil[J]. Journal of Shanghai University（Natural Science Edition）, 2017, 23(4): 590-599.

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高强土工格室加筋砂土性状的三轴试验

Triaxial test of high strength geocell reinforced soil

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