季冻区路基土冻胀主要影响因素对冻深的影响规律  

Laws of Main Influencing Factors on Frozen Depth of Subgrade Frost Heaving in Seasonal Frozen Zone

作　　者：张玉富[1,2] 于天来[1] 

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040 [2]黑龙江省交通科学研究所,哈尔滨150080

出　　处：《森林工程》2014年第3期131-135,193,共6页Forest Engineering

摘　　要：依托黑龙江省庆安冻土科学试验场,开展了不同土质冻胀量和冻深等的试验观测。根据试验和观测数据,分析土质、土的冻胀率及坡向与路基冻深的关系,得到3个主要影响因素对路基土冻深的影响规律,分析土质、冻胀率及地形坡向对路基冻深的影响程度。基于上述研究结论,提出土质、冻胀率及地形坡向对路基土冻深的修正系数。利用三个修正系数,可以实现对标准冻深的修正,计算路基的实际冻深,作为路基换填以及路面抗冻厚度设计的依据。Based on Qingan scientic field of frost soil in Heilongjiang province,tests and observations on different soils have been conducted. According to the results of tests and observations,the relationship between soil types,frost heaving ratio,terrain slope and frozen depth of subgrade were analyzed and the influence laws of the three main influencing factors on frozen depth of subgrade were obtained. The impact degree of soil types,frost heaving ratio and terrain slope on frozen depth of subgrade were analyzed. On the basis of the conclusions above,the modified coefficients of frozen depth of subgrade with respect to soil types,frost heaving ratio,and terrain slope were proposed. Using these three coefficients,we can modify the Standard Frozen Depth,and calculate the real frozen depth of the subgrade. Such results can be used to determine the replacement thickness of subgrade and the frost-resistance thickness of pavements.

关 键 词：路基 冻胀 影响因素 季冻区 

分 类 号：U416.1[交通运输工程—道路与铁道工程] S773.3[农业科学—森林工程]