玄武岩纤维改良华东地区红黏土的工程适用性分析
Engineering Applicability Analysis of Basalt Fiber Modified the Red Clay in East China
葛宏盛 1刘丽萍 1汪朝明 2郑贞成2
作者信息
- 1. 西安工业大学 建筑工程学院, 陕西 西安 710021
- 2. 浙江成明试验检测有限公司, 浙江 衢州 324300
- 折叠
摘要
高液限红黏土在华东地区分布广泛,若治理不当极易引发工程灾害.通过室内土工试验和数值模拟分析玄武岩纤维改良高液限红黏土的可行性.结合室内试验结果,采用有限元差分软件FLAC3D 模拟均质红黏土路基和添加玄武岩纤维红黏土路基在施加均布荷载情况下对两者塑形区、应力及沉降进行对比.室内土工试验表明,玄武岩纤维能大幅提高土体的黏聚力、无侧限抗压强度以及土体静态弹性模量.数值模拟分析表明,纤维加筋技术能缓解土体塑性流动,提升抗挤压能力,缓解沉降变形.依托纤维加筋技术改良高液限红黏土,可为特殊土体路基改良提供新的理论依据.
Abstract
High liquid limit red clay is widely distributed in East China,which can easily lead to engineering disasters if improperly treated.The feasibility of enhancing high-liquid limit red clay with basalt fiber was analyzed through laboratory geotechnical tests and numerical simulation.The laboratory test results were combined with the finite element difference software FLAC3D to simulate the plastic zone,stress,and settlement of two types of subgrade——the homogeneous red clay subgrade and the basalt fiber red clay subgrade under uniform load conditions.The aim was to compare the performance of the two types of subgrade.Laboratory geotechnical test results indicate that adding basalt fiber can significantly improve the cohesiveness,unconfined compressive strength,and static elastic modulus of red clay.The numerical simulation demonstrates that fiber reinforcement technology can improve soil plasticity,anti-squeezing ability,and alleviate settlement deformation.The reinforcement of high-liquid limit red clay with fiber technology provides a new theoretical basis for improving special soil roadbeds.
关键词
玄武岩纤维/高液限红黏土/室内土工试验/FLAC3D/沉降变形Key words
basalt fiber/high liquid limit red clay/laboratory geotechnical test/FLAC3D/settlement deformation引用本文复制引用
基金项目
西安工业大学2021年国家级大创项目(202110702052)
西安工业大学研究生教育教学改革研究项目(XAGDYJ190219)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据