固化土应力-应变力学特性及其影响因素分析  

Stress-strain Relationships and Influencing Factors of Mechanical Properties of Stabilized Soil

作　　者：赵莹莹[1] 付秀丽 张国忠[1] 周宇[1] 马千惠[1] 肖永[1] ZHAO Ying-ying;FU Xiu-li;ZHANG Guo-zhong;ZHOU Yu;MA Qian-hui;XIAO Yong(School of Architecture Engineering, Jiamusi University, Jiamusi 154007, China;Changchun Jianye Group Co., Ltd, Changchun 13000, China;Changchun City Highway Engineering Supervision Consulting Co., Ltd , Changchun 13000, China)

机构地区：[1]佳木斯大学建筑工程学院,黑龙江佳木斯154007 [2]长春建业集团股份有限公司,吉林长春130000 [3]长春市公路工程监理咨询有限公司,吉林长春130000

出　　处：《佳木斯大学学报（自然科学版）》2018年第6期849-851,882,共4页Journal of Jiamusi University：Natural Science Edition

基　　金：黑龙江省教育厅科学技术研究项目(2016-KYYWF-0572)

摘　　要：通过静三轴试验对固化土进行研究,分析固化剂掺量、养护时间、围压对其应力-应变关系及其强度特性的影响。研究表明,素土和固化土应力-应变关系曲线均呈应变软化型特征,不同的是固化土的软化程度更强,且随着固化剂掺量的增加软化程度越显著。固化剂的加入可有效改善土体工程性能,并在大应变水平下效果更佳。固化土的应力-应变关系曲线随着固化剂掺量、养护时间、围压增加而提升,且早期强度、初始弹性模量、峰值强度和残余强度也随之提升。土体固化技术是一种高效快速改善土体性能的方法,为交通工程建设和施工积累重要技术参数,对不良土应用于路基工程提供有效加固技术。Triaxial tests were carried to study the influences of stabilizer content,curing time and confining pressure on the stress-strain relationship and strength of stabilized soil.Test results showed that the stress-strain curves of plain soil and stabilized soil all present to be stain softening.The strain softening degree of stabilized soil is stronger and significantly increases with increasing stabilizer content.The addition of stabilizer can effectively improve the engineering characteristics of soil,especially at high strain level.The stress-strain curve of stabilized soil lifts with increasing stabilizer content,curing time and confining pressure,also the early strength,initial elastic modulus,peak strength and residual strength.The stabilizer reinforcement technique presents a superiority of efficient and rapid soil enhancement.The technique could accumulate important technical parameters for traffic constructions and provides efficient reinforcement method for bad soil application in roadbed engineering.

关 键 词：三轴试验 固化土 应力-应变关系 应变软化型 

分 类 号：U214.01[交通运输工程—道路与铁道工程]