固化盐渍土路用力学性能试验研究  

Experimental Study on Mechanical Properties of Solidified Saline Soilin Roads

作　　者：杨力谨 马鲁宽 高达辰 YANG Lijin;MA Lukuan;GAO Dachen(Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科技》2025年第2期1-6,共6页Transportation Science & Technology

基　　金：国家自然科学基金青年科学基金项目(52308462)资助。

摘　　要：针对现有盐渍土处治利用问题,采用纤维固化剂对新疆和田地区的盐渍土开展固化处治,并研究其路用力学性能。以CBR为固化性能力学分析指标,通过室内试验,确定纤维固化剂最佳掺配比例,并在93%和96%2种压实度和最佳含水率、最佳含水率+2%、最佳含水率-2%3种含水率工况下,探究掺加纤维固化剂对CBR、无侧限抗压强度、抗剪强度和回弹模量等力学性能的影响,最后分析固化盐渍土强度指标的相关性与路用性能的可行性。结果表明,纤维复合固化剂对盐渍土掺配比例宜选取为5%,在养生过程中需避免水分侵入,且可使用DCP贯入度表征固化盐渍土的CBR、回弹模量、无侧限抗压强度等指标,为盐渍土的改良应用提供一定的参考。Aiming at the problem of utilizing saline soil,fiber solidifying agent was used to treat saline soil in Hotan area of Xinjiang,and its mechanical properties for road use were studied.Taking CBR as the mechanical analysis index of solidification performance,the optimal mixing ratio of fiber solidifying agent was determined through laboratory tests.Under two compaction degrees of 93% and 96%,and three water content conditions of optimal moisture content,optimal moisture content +2%,and optimal moisture content-2%,the effects of adding fiber solidifying agent on mechanical properties such as CBR,unconfined compressive strength,shear strength and resilient modulus were investigated.Finally,the correlation of strength indicators and feasibility of road use performance of solidified saline soil were analyzed.The results show that the optimal mixing ratio of fiber composite solidifying agent for saline soil should be 5%.Water intrusion should be avoided during curing process.The CBR,resilient modulus,unconfined compressive strength and other indicators of solidified saline soil can be characterized by DCP penetration,which provides some reference for the improvement and application of saline soil.

关 键 词：盐渍土 固化配比 力学性能 纤维固化剂 

分 类 号：U416[交通运输工程—道路与铁道工程]