纤维加筋水泥土力学性能研究  

Study on the Mechanical Properties of Fiber Reinforced Soil

作　　者：汤东 TANG Dong(China Southwest Municipal Engineering Design&Research Institute Co.,Ltd.,Chengdu 610081,China)

机构地区：[1]中国市政工程西南设计研究总院有限公司,成都610081

出　　处：《路基工程》2022年第2期79-83,共5页Subgrade Engineering

摘　　要：依托四川某二级公路路堤工程,通过室内试验研究水泥土、玻璃纤维水泥土和玄武岩纤维水泥土力学性能,结果表明:水泥土力学强度随养生龄期增加呈幂函数关系增长;水泥土力学强度与水泥剂量正相关,且建立的强度增长模型能较好地预测水泥土强度增长趋势;水泥掺量≥6%时,水泥土水稳系数提高速率减缓;水泥土掺入纤维后力学强度提高显著,且玄武岩纤维加筋效果略优于玻璃纤维,掺1%玻璃纤维的水泥土抗压强度和劈裂强度分别提高230.0%,27.5%;纤维水泥土强度增长规律与水泥土基本一致,养生前28天力学强度增长显著,纤维水泥土28天抗压强度至少是180天抗压强度的78.9%;28天劈裂强度至少是180天劈裂强度的77.8%。Based on Sichuan secondary highway embankment project. the mechanical properties of cement-soil,glass fiber cement-soil and basalt fiber cement-soil have been studied through laboratory tests.The results show that the mechanical strength of soil-cement increases in a power function relationship with the increase of maintenance period. The mechanical strength of soil-cement is positively correlated with the cement dose, and strength growth trend of soil-cement can be predicted by the strength growth model established. When the cement content is more than 6 %, the increasing rate of soil-cement water stability coefficient slows down. The mechanical strength of soil-cement mixed with fiber has significantly improved, and the reinforcement effect of basalt fiber is slightly better than that of glass fiber. The compressive strength and splitting strength of soil-cement mixed with 1 % glass fiber have increased by 230.0 %, 27.5 % respectively. The strength growth of fibrous soilcement is basically consistent with that of soil-cement. The 28 d mechanical strength of fibrous soil-cement has increased significantly before incubation, and the compressive strength of fibrous soil-cement at 28 d is at least78.9 % of that at 180 d. and the splitting strength at 28 days is at least 77.8 % of that of 180 d splitting strength.

关 键 词：路基工程 纤维水泥土 力学强度 水稳定性 试验研究 

分 类 号：U414[交通运输工程—道路与铁道工程]