重载铁路路基填料性能改良试验研究
Experimental Study on Improvement of Heavy-haul Railway Subgrade Filler
武伟刚 1李岩2
作者信息
- 1. 四川铁道职业学院,四川成都 170032;西南交通大学土木工程学院,四川成都 170032
- 2. 中国十九冶集团有限公司,河北石家庄 050000
- 折叠
摘要
基于静动力学试验,研究纤维改良、固化剂改良及纤维-固化剂改良三种加固方法对重载铁路路基填料性能的影响,进而提出最佳改良方案.结果表明:采用固化剂改良,固化土中固化剂掺量为5%时,强度达到峰值,养护时间越长强度越高.采用纤维改良,当纤维掺量为 0.2%时,纤维土静动力学性能达到最佳;当纤维长度为 0～12 mm时,强度随着纤维长度的增加而增强,当长度为 12～18 mm时,强度随着纤维长度的增加而降低.采用纤维-固化剂联合改良方案加固效果最好.建议该地区采用纤维-固化剂联合改良方案增强路基填料物理力学性能,试验得出的最佳掺量为:固化剂掺量 5%,纤维掺量 0.2%,纤维长度 12 mm.
Abstract
Based on static and dynamic triaxial tests,the effects of three reinforcement methods,including fiber improvement,curing agent improvement,and fiber-curing agent improvement,on the performance of heavy-haul railway subgrade filler were stud-ied,and the best improvement scheme was proposed.The results show that when the curing agent content in the curing soil is 5%,the strength reaches the peak,and the longer the curing time,the higher the strength.With fiber improvement,when the fiber content is 0.2%,the soil static dynamic performance of fiber reaches the best;When the fiber length is 0～12 mm,the strength increases with the increase of fiber length,and when the length is 12～18 mm,the strength decreases with the increase of fiber length.The fiber-curing agent combined improvement scheme is the best reinforcement effect.It is recommended that the fiber-curing agent combined improve-ment scheme be used to enhance the mechanical properties of the subgrade filler,and the optimal curing agent content is 5%,fiber con-tent is 0.2%,and fiber length is 12 mm.
关键词
路基填料/纤维改良/固化剂改良/纤维-固化剂改良Key words
subgrade filler/fiber improvement/curing agent improvement/fiber-curing agent improvement引用本文复制引用
出版年
2024
NETL
NSTL
万方数据