CAJ | 학술논문

为研究东北寒区频发的渠道冻胀问题，针对黑龙江北安二龙山农场灌渠渠底冻胀情况，将其简化为一维冻胀模型，设计并制作了符合一维冻胀工况的试验装置，采用正交试验方法对影响渠底土冻胀力的因素进行分析，结果表明：平均冻胀温度是最主要的影响因素，冻胀力随温度的降低而升高，且在－40℃时（其他因素不变）法向冻胀力最大，为1．49 MPa；含水率影响也比较显著，冻胀力随含水率增大而升高，但当含水率超过18％时冻胀力略有下降，含水率为18％时（其他因素不变）冻胀力最大，为1．45 MPa；当含水率为14％、平均冻胀温度为－40℃、预加压力为1 kN、土样孔隙率为62％时，冻胀力最大，冻胀最明显。
위연구동북한구빈발적거도동창문제，침대흑룡강북안이룡산농장관거거저동창정황，장기간화위일유동창모형，설계병제작료부합일유동창공황적시험장치，채용정교시험방법대영향거저토동창력적인소진행분석，결과표명：평균동창온도시최주요적영향인소，동창력수온도적강저이승고，차재－40℃시（기타인소불변）법향동창력최대，위1．49 MPa；함수솔영향야비교현저，동창력수함수솔증대이승고，단당함수솔초과18％시동창력략유하강，함수솔위18％시（기타인소불변）동창력최대，위1．45 MPa；당함수솔위14％、평균동창온도위－40℃、예가압력위1 kN、토양공극솔위62％시，동창력최대，동창최명현。
In order to investigate the problem of canals'frost heaving damage in the cold area of northeast of China,a one-dimensional mod-el of frost heaving was set up and calculated for simulating the bottom of channel in Erlongshan Farm of Beian State Farm in Heilongjiang Province. A testing device conforming to the one-dimensional working condition was designed and fabricated. The factors of influencing the frost heaving force of canal's subsoil were analyzed by using of the orthogonal experiment. The results show that the frosting temperature range is the most impacting factor. Frost heaving force increases with the decreasing of temperature. And when the temperature reaches to -40℃, the maximum frost heaving force is 1. 49 MPa. The second important impacting factor is the water ratio. The frost heaving force increases with the increasing of water ratio,however the frost heaving force slightly decreases when the water ratio exceeds 18%. At this point,the maxi-mum frost heaving force is 1. 45 MPa. The maximum frost heaving force can be got on the condition that the water ratio is 14%,the frost temperature is -40℃,the pressure is 1kN and soil porosity is 62%. In this condition,the most obvious frost heaving effect can be arrived.