工程地质学报2025，Vol.33Issue(3)：827-844,18.DOI:10.13544/j.cnki.jeg.2023-0172
改良川西红层软岩填料崩解特性试验研究
EXPERIMENTAL STUDY ON DISINTEGRATION CHARACTERISTICS OF IMPROVED RED-BED SOFT ROCK FILLER IN WESTERN SICHUAN
摘要
Abstract
Red-bed soft rock is a special kind of rock-soil,which has the characteristics of low strength,easy sof-tening and disintegration in water.When it is directly used as engineering filler,it will cause many engineering geo-logical problems such as foundation cracking,subsidence,collapse and so on.Therefore,in order to improve the disintegration of red-bed soft rock filler,we choose the soft rock filler excavated from red-bed slopes in Jintang County and Zhongjiang County of western Sichuan as research object.Then,using guar gum,lignin fiber and poly-propylene fiber as modified materials,we carry out the disintegration experiment of remodeling red-bed soft rock filler in western Sichuan under the conditions of single and guar gum-lignin fiber and guar gum-polypropylene fiber composites.By comparing the disintegration macroscopic morphology,disintegration rate,disintegration velocity and final disintegration rate of Jintang and Zhongjiang in western Sichuan under different improvement conditions,we analyzed the improvement effect of disintegration resistance and revealing the mechanism of action from a microscop-ic perspective.The results show that guar gum has the best improvement effect when using one single material,and the best blending ratio is 1％.The improvement effect of polypropylene fiber is weaker,and its improvement effect is related to the length and blending.The polypropylene fiber length is 6 mm and the incorporation ratio is 0.8％.The improvement of using lignin fiber on the disintegration resistance of remodeling red-bed soft rock filler in west-ern Sichuan is almost 0.Compared with single material,the composite improvement of guar gum-polypropylene fiber and guar gum-lignin fiber has a more significant effect on the disintegration resistance of remodeling red-bed soft rock filler in western Sichuan,and the improvement effect of guar gum-polypropylene fiber is the best.The research results will provide some reference for engineering construction and disaster prevention in Jintang,Zhongjiang and other red-bed soft rock areas.关键词
红层软岩填料/崩解特性/崩解率/崩解速率/最终崩解率/最佳掺比Key words
Red-bed soft rock filler/Disintegration characteristics/Disintegration rate/Disintegration velocity/Final disintegration rate/Optimum blending ratio分类
天文与地球科学引用本文复制引用
刘凤云,郑文凤,谢飞,罗怀瑞,邱恩喜,王知深,万旭升..改良川西红层软岩填料崩解特性试验研究[J].工程地质学报,2025,33(3):827-844,18.基金项目
国家自然科学基金项目(资助号:42071087),西南石油大学启航计划项目(资助号:2021QHZ003).This research is supported by the National Natural Science Foundation of China(Grant No.42071087)and the Scientific Research Starting Project of SWPU(Grant No.2021QHZ003). （资助号:42071087）
