聚丙烯纤维与水泥固化广州南沙软土的试验研究  

EXPERIMENTAL RESEARCH ON POLYPROPYLENE FIBER AND CEMENT REINFORCED NANSHA SOFT SOIL IN GUANGZHOU

作　　者：梁仕华[1] 林焕生 周世宗 牛九格 李烁 LIANG Shihua;LIN Huansheng;ZHOU Shizong;NIU Jiuge;LI Shuo(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院

出　　处：《工业建筑》2018年第7期87-90,152,共5页Industrial Construction

基　　金：国家自然科学基金项目(51508109);广东省自然科学基金项目(2016A030313692,2016A030310345)

摘　　要：为了改善水泥固化软土存在的不足,采用聚丙烯纤维-水泥对广州南沙软土进行固化,分析探讨了纤维水泥固化土的受压破坏方式以及纤维掺量、纤维长度、水泥掺量、龄期对纤维水泥固化土无侧限抗压强度的影响。试验结果表明：在水泥土中掺入纤维能在一定程度上提高其无侧限抗压强度,且在一定范围内,无侧限抗压强度随纤维掺量和纤维长度的增加而增大;纤维水泥土中水泥的最优掺量为12%;纤维水泥土的无侧限抗压强度随着龄期的增长而增大,并且早期强度增长较快,后期增长较慢并趋于稳定;纤维能增加水泥土的抗拉强度,减少水泥土试样破坏时的裂缝宽度和数量,改善它们的脆性破坏形式。In order to improve the performance of cement reinforced soft soil,polypropylene fiber was added to cement to reinforced Nansha soft soil in Guangzhou. The research included failure mode,the effects of fiber amount,cement amount and fiber length on the unconfined compressive strength（ UCS） of fiber-cement reinforced soil. The test results showed that the fiber could improve the unconfined compressive strength of cement soil in a certain extent,and the strength of cement soil increased as the fiber content and fiber length increased; the optimal mixing ratio of cement in cement soil was 12%; the unconfined compressive strength of cement soil increased as the growth of the age,and the early strength grew faster; fiber could improve the tensile strength of cement soil,reduce the width and number of cracks in cement soil samples,hence improving the form of brittle failure.

关 键 词：纤维 水泥土 固化 广州南沙软土 无侧限抗压强度 

分 类 号：TU447[建筑科学—岩土工程]