摘要
为研究冻融循环作用下加筋土的力学性能,开展不同加筋层数条件下加筋土的力学特性试验,系统分析了加筋层数和冻融循环次数对加筋土无侧限抗压强度的影响,并探讨了冻融循环作用下加筋土的强度损伤演化规律。结果表明:加筋可以提高土体的无侧限抗压强度;随着加筋层数的增加,加筋土的无侧限抗压强度呈现先增大后减小的趋势;不同加筋层数的试样表现出不同的破坏特征,但加筋能有效抑制裂隙扩展;随着冻融循环次数的增加,素土与加筋土的无侧限抗压强度均呈现下降趋势;但在同一冻融循环条件下,加筋土的强度始终高于素土,其中以两层加筋的增强效果最为显著。
To investigate the mechanical properties of reinforced soil under freeze-thaw cycles,experiments were conducted to examine the mechanical characteristics of reinforced soil with different numbers of reinforcement layers.The effects of the number of reinforcement layers and the number of freeze-thaw cycles on the unconfined compressive strength of reinforced soil were systematically analyzed,and the evolution of strength deterioration of reinforced soil under freeze-thaw cycles was explored.The results show that reinforcement can increase the unconfined compressive strength of soil.As the number of reinforcement layers increases,the unconfined compressive strength of reinforced soil first increases and then decreases.Samples with different numbers of reinforcement layers exhibit different failure characteristics,but reinforcement can effectively inhibit the propagation of cracks.As the number of freeze-thaw cycles increases,the unconfined compressive strength of both plain and reinforced soils decreases.However,under the same freeze-thaw conditions,the strength of reinforced soil is always higher than that of plain soil,with the enhancement effect being most significant for soil with two reinforcement layers.
作者
徐丽娜
高越新
孙爽
牛雷
XU Lina;GAO Yuexin;SUN Shuang;NIU Lei(School of Transportation Science and Engineering,Jilin Jianzhu University,Changchun 130118,China;School of Civil Engineering,Jilin Jianzhu University,Changchun 130118,China)
出处
《铁道建筑》
北大核心
2025年第11期48-53,共6页
Railway Engineering
基金
吉林省自然科学基金(20250101049JJ)。
关键词
冻融循环作用
加筋土
加筋间距
加筋层数
力学性能
freeze-thaw cycle
reinforced soil
reinforcement spacing
reninforcement layer number
mechanical property
