水泥生物酶复合固化红砂岩土的力学与耐久性能  

Mechanical Properties and Durability of Red Sandstone Soil Solidified by Cement and Biological Enzyme

作　　者：关宏信[1] 张海翔 杨海荣[1] 杨飞 郑天一 GUAN Hongxin;ZHANG Haixiang;YANG Hairong;YANG Fei;ZHENG Tianyi(School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hunan Hengyong Expressway Construction and Development Co.,Ltd,Yongzhou 425001,China)

机构地区：[1]长沙理工大学交通运输工程学院,长沙410114 [2]湖南省衡永高速公路建设开发有限公司,永州425001

出　　处：《硅酸盐通报》2025年第2期765-773,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(52278438);长沙理工大学专业学位研究生“实践创新与创业能力提升计划”(CLSJCX23015)。

摘　　要：为研究生物酶土壤固化剂与水泥复合固化红砂岩土的性能,探究复合固化红砂岩土用于高速公路底基层的可行性,以及研究生物酶土壤固化剂掺量对固化土力学性能与耐久性能的影响,并结合扫描电子显微镜微观试验分析稳定机理。结果表明:生物酶土壤固化剂的掺入可提高固化土的无侧限抗压强度、劈裂强度、抵抗贯入强度和弹性模量,最佳掺量为2%;相同应力比下,复合固化土的疲劳寿命相比水泥单一固化土增长不明显,相同应力下,复合固化土的疲劳寿命相比水泥单一固化土显著增加。本研究为复合固化红砂岩土用于高速公路底基层提供参考。In order to study the performance of red sandstone soil solidified by biological enzyme soil curing agent and cement,and to explore the feasibility of composite solidified red sandstone soil used in expressway subbase,the effects of biological enzyme soil curing agent dosages on mechanical properties and durability of solidified soil were carried out,and microscopic tests were carried out in combination with scanning electron microscopy to analyze the stability mechanism.The results show that the addition of biological enzyme soil curing agent improves the unconfined compressive strength,splitting tensile strength,penetration resistance strength and elastic modulus of solidified soil,and the optimal dosage is 2%.Under the same stress ratio,the fatigue life of composite solidified soil has no obvious advantage compared with that of single solidified soil by cement,but under the same stress,the fatigue life of composite solidified soil increases significantly compared with that of single solidified soil by cement.This study provides a reference for the practical engineering application of composite solidified red sandstone soil in expressway subbase.

关 键 词：生物酶土壤固化剂 红砂岩土 路面底基层 力学性能 耐久性能 

分 类 号：U416.2[交通运输工程—道路与铁道工程]