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（1 哈爾濱工業(yè)大學(xué)建筑設(shè)計(jì)研究院， 哈爾濱 150090; 2 哈爾濱工業(yè)大學(xué)土木工程學(xué)院， 哈爾濱 150090）

［摘要］采用穩(wěn)態(tài)比較法，自行研制室內(nèi)凍土導(dǎo)熱系數(shù)測(cè)定裝置，并開(kāi)展了溫度、含水量對(duì)凍土導(dǎo)熱系數(shù)的影響研究。結(jié)果表明，原狀土的導(dǎo)熱系數(shù)略小于重塑土的導(dǎo)熱系數(shù)。依據(jù)《土工試驗(yàn)方法標(biāo)準(zhǔn)》（GB/T 50123—1999），進(jìn)行混凝土與凍土間的凍結(jié)強(qiáng)度試驗(yàn)。試驗(yàn)結(jié)果表明，凍結(jié)力隨著位移變化經(jīng)過(guò)兩個(gè)階段：強(qiáng)化階段與弱化階段。

［關(guān)鍵詞］凍土； 導(dǎo)熱系數(shù)； 凍結(jié)強(qiáng)度

中圖分類號(hào)：TU475+.2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)12-0101-04

Experimental determination on heat exchange coefficient and freezing strength of frozen soil

Xu Chunhua1, Xin Yu1, Xu Xueyan2

(1 The Architectural Design and Research Institute of HIT, Harbin 150090, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

Abstract:By using steady state comparison method, special experimental setup was developed to measure coefficient of thermal conductivity of indoor frozen soil. Then the influences of temperature and water contents on thermal conductivity coefficient of frozen soil were analyzed. It was found that the thermal conductivity coefficient of undisturbed soil was slightly smaller than that of disturbed soil. The freezing strength test between concrete and frozen soil was conducted based on the Standard for soil test method（GB/T 50123—1999）. The experimental results show that the relationship between frozen freezing force and displacement can be divided into two stages, which are hardening stage and weakening stage respectively.

Keywords:frozen soil; coefficient of thermal conductivity; freezing strength

作者簡(jiǎn)介：徐春華，博士，高級(jí)工程師，Email:2991212180@qq.com。