基于响应面法的纤维复合固化黏砂土性能试验研究  

Experimental study on performance of fiber composite solidified clay sand based on response surface method

作　　者：王浩[1] 付德伟 张士科[2] WANG Hao;FU Dewei;ZHANG Shike(School of Architecture and Engineering,Henan University,Kaifeng 475004,China;School of Architecture and Engineering,Anyang Normal University,Anyang 455000,China)

机构地区：[1]河南大学建筑工程学院,河南开封475004 [2]安阳师范学院建筑工程学院,河南安阳455000

出　　处：《人民长江》2025年第2期190-200,共11页Yangtze River

基　　金：河南省科技攻关项目(242102320370,232102320028,242102321007);河南省高等学校重点科研项目(24B560002)。

摘　　要：水泥稳定类材料作为道路基层存在强度低、易产生裂缝、耐久性差等缺陷,为此考虑往其中添加聚甲醛(POM)纤维制作复合固化土。采用Box-Behnken响应面法进行试验设计,通过无侧限抗压强度试验、劈裂强度试验、水稳定性试验、冻融循环试验进行纤维复合固化黏砂土性能提升研究。结果表明:水泥掺量5.47%、纤维掺量0.32%、纤维长度8.09 mm时,固化土7 d无侧限抗压强度提升最明显;各单因素对于固化土影响显著性从大到小排序为水泥掺量>POM纤维掺量>POM纤维长度;POM纤维能够提高固化土劈裂强度,增强水稳定性和抗冻性,POM纤维掺量0.30%、纤维长度8 mm时,固化土劈裂强度最大,同时水稳定性和抗冻性提升效果较为显著。研究成果可为黄泛区黏砂土的性能改良提供借鉴。As a road base,cement stabilized materials have the defects of low strength,easy to produce cracks and poor durability.Therefore,it is considered to add polyformaldehyde(POM)fiber to make composite solidified clay sand.The Box-Behnken response surface method was used for experimental design,and the unconfined compressive strength test,splitting strength test,water stability test and freeze-thaw cycle test were used to explore the performance improvement of composite solidified clay sand.The results showed that when the cement content was 5.47%,the POM fiber content was 0.32%,and the fiber length was 8.09 mm,the 7 d unconfined compressive strength of the solidified soil was the most obvious.The importance ranking of each single factor on the performance of solidified clay sand was:cement content>POM fiber content>POM fiber length.POM fiber could improve the splitting strength of solidified clay sand,enhance water stability and frost resistance.When the POM fiber content was 0.30%and the fiber length was 8 mm,the splitting strength of solidified soil was the largest,and the water stability and frost resistance were significantly improved.The research results can provide reference for the performance improvement of clay sand in the Yellow River flood area.

关 键 词：黏砂土 聚甲醛(POM)纤维 响应面法 力学性能 耐久性能 

分 类 号：U414[交通运输工程—道路与铁道工程]