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

作　　者：葛宏盛 刘丽萍[1] 汪朝明 郑贞成 GE Hong-sheng;LIU Li-ping;WANG Chao-ming;ZHENG Zhen-cheng(Xi′an Technological University,Xi′an 710021,China;Zhejiang Chengming Experimental Testing Co.,Ltd.,Quzhou 324300,China)

机构地区：[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

出　　处：《河北地质大学学报》2024年第1期78-85,共8页Journal of Hebei Geo University

基　　金：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)。

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FLAC^(3D)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。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 FLAC 3D 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 FLAC~(3D) 沉降变形 

分 类 号：TU47[建筑科学—结构工程]