摘要
对渠道受冻胀时其刚性衬砌层 (板 )受冻胀力的情况进行了室内模型测试试验 ,结果表明 :其边坡衬砌层 (板 )所受的冻胀力是平行于该衬砌层 (板 )的切向冻胀力 ,该力大小及正负与渠床土含水量沿渠道横断面高度的分布直接相关 .另外 ,渠道边坡衬砌层 (板 )和其下冻土层之间冻结约束的存在与否是边坡衬砌层 (板 )会不会受冻胀力的必要条件 ,若此约束存在 ,则可能受冻胀力 ,若此约束不存在(被解除 ) ,则其不可能受冻胀力 .从对试验结果的分析中 ,还找到了造成渠道刚性衬砌层 (板 )冻胀破坏的最终原因 ,并据此提出了一些针对性很强的防治渠道冻胀破坏的方法 .
A laboratory model test was carried out to study the lining slate when canals suffered the frost heaving. It was found that the frozen\|heaving force acted on the slate was parallel to the slate, a tangential force. The magnitude and positive or negative sign of the force directly relates to the water content of canal\|bed soil distributed along the canal cross section. Moreover, frozen restraint between the slate and the underneath frozen soil is an important condition for frost heaving of the slate. Frost heaving may occur when the frozen restraint exists, and vice versa. Analyzing the test results, the conclusive cause of frost failure of a rigid lining slate was found. Base on this analysis, some measures against frost heaving damage to canals were provided.
出处
《冰川冻土》
CSCD
北大核心
2002年第5期639-641,共3页
Journal of Glaciology and Geocryology
基金
国家重大科技产业工程子专题 (99 0 2 1)资助
关键词
渠道
刚性衬砌层
切向冻胀力
渠床土含水量
冻胀破坏原因
tangential frost\|heaving force
minitype rigid lined canal
frozen restraint
water content of canal-bed soil
cause of frost failure
