南昌工程学院学报2025，Vol.44Issue(1)：27-36,10.
聚丙烯纤维与土壤稳定剂联合改良煤系土的应力-应变特征及其本构模型研究
Stress-strain characteristics and constitutive model of coal bearing soil improved by combination of polypropylene fiber and soil stabilizer
摘要
Abstract
In order to study the stress-strain relationship of coal measure soil improved by polypropylene fiber and soil stabi-lizer,the mechanical properties of soil stabilizer combined with polypropylene fiber and soil stabilizer were studied by con-ventional triaxial tests.Based on the triaxial test results,the improvement of the Duncan-Chang model by introducing the Ra-tio of soil stabilizer incorporation as a characteristic parameter,and the accuracy of the model modification were verified.The results show that the soil stabilizer content has a significant effect on the strength of the combined improved coal measure soil.When the incorporation ratio was increased from 1％to 2.5％,the cohesion of the improved coal measure soil increases from 115kPa to 176kPa,an increase of 53％.The stress-strain curve of the combined modified coal measure soil with poly-propylene fiber and soil stabilizer shows a strain-hardening characteristic.The initial tangential elastic modulus,bulk modu-lus and limit principal stress difference of the combined modified coal measure soil increase with the increase of the Ratio of soil stabilizer incorporation and confining pressure,while the ratio of soil stabilizer incorporation and confining pressure have little influence on the failure ratio of the combined modified coal measure soil.The prediction curve of the modified Duncan-Chang model is basically consistent with the triaxial test curve,indicating that the modified Duncan-Chang model can accu-rately characterize the real stress state of coal measures soil improved by the combination of polypropylene fiber and soil sta-bilizer,which provides a theoretical guidance for its application in roadbed engineering.关键词
煤系土/联合改良/聚丙烯纤维/土壤稳定剂/邓肯-张修正模型Key words
coal bearing soil/combined improvement/polypropylene fiber/soil stabilizer/Duncan-Chang modified model分类
土木建筑引用本文复制引用
朱瑞,廖良健,周子敬,张淑怡,王志博,张鸿..聚丙烯纤维与土壤稳定剂联合改良煤系土的应力-应变特征及其本构模型研究[J].南昌工程学院学报,2025,44(1):27-36,10.基金项目
国家自然科学基金资助项目(52068053) （52068053）
江西省南昌市优势科技创新团队项目(2017CXTD012) （2017CXTD012）
