冻融作用对土体物理力学性质影响研究进展  

Research progress on the effect of freezing and thawing on the physical and mechanical properties of soil

作　　者：汪恩良[1] 姜海强[1] 张栋[1] 刘风波[1] 

机构地区：[1]东北农业大学水利与土木工程学院,哈尔滨150030

出　　处：《东北农业大学学报》2017年第5期82-88,共7页Journal of Northeast Agricultural University

基　　金：国家自然科学基金(51541901);黑龙江省应用技术研究与开发计划(GZ16B020);黑龙江省自然科学基金(E201405)

摘　　要：冻融作用是强风化作用,显著改变土物理、力学性质,影响寒区构筑物安全性和耐久性。通过比对分析冻融后土的物理性质和力学性质,表明试验材料和方法是试验结果差异主要成因,尤以孔隙率和内摩擦角差异性最显著。在解决工程实际问题时,应结合实际气象资料确定温度控制模式,采用模型比尺选取温度变化范围和速率,与实际气温变化吻合。由于土体冻融过程复杂性,开敞和封闭系统下冻融过程对土体物理性质、力学性质影响差异显著。Freezing and thawing cycle could make a great change on the physical and mechanical pro- perties of the soil. As strong weathering which will affect the safety and durability of the structure. The following conclusions were drawn by summarizing the results of previous experiments and making contrastive analysis on the physical and mechanical properties of the soil after the freezing and thawing cycle. The main reason of different results were attributed to the different test materials and methods, especially the porosity and internal friction angle. In solving engineering problems, the confirmation of temperature control mode and the range and rate of temperature were based on the actual meteorolo- gical data and the model scale respectively, which consisted with the actual condition. Meanwhile, the model had a higher credibility in the actual project. Due to the complexity of the soil freezing and thawing process, the difference of the physical and mechanical properties under the open and closed systems should be attention.

关 键 词：寒区 冻融 物理性质 力学性质 差异性 

分 类 号：U213.14[交通运输工程—道路与铁道工程] U416.168