本文選題：凍脹變形 + 凍脹試驗(yàn)系統(tǒng)��； 參考：《北京工業(yè)大學(xué)學(xué)報(bào)》2017年09期

【摘要】：為了研究土體在不同環(huán)境下的凍脹特性,自主設(shè)計(jì)研制了土體凍脹試驗(yàn)系統(tǒng).該系統(tǒng)模擬自然條件下路基土的工作狀態(tài),從溫度荷載的加載方式、上覆荷載的加載方式、水分補(bǔ)給方式、側(cè)向約束條件等方面嚴(yán)格控制試驗(yàn)環(huán)境.基于溫度控制盤、滑動(dòng)絕熱裝置的創(chuàng)新設(shè)計(jì),在實(shí)驗(yàn)室內(nèi)實(shí)現(xiàn)了對(duì)路基土凍脹過程的真實(shí)模擬,并實(shí)現(xiàn)了凍結(jié)過程中溫度分布、上覆壓力和凍脹變形的實(shí)時(shí)監(jiān)測(cè).最后,通過飽和粉質(zhì)黏土凍脹試驗(yàn)的測(cè)試結(jié)果,驗(yàn)證了該系統(tǒng)的可靠性和有效性,明確了土體凍結(jié)過程中的溫度分布特征和凍脹變形規(guī)律.
[Abstract]:In order to study the frost heave characteristics of soil in different environments, a soil frost heave test system was designed and developed. The system simulates the working state of subgrade soil under natural conditions, and strictly controls the test environment from the aspects of loading mode of temperature load, loading mode of overburden load, water supply mode, lateral constraint condition and so on. Based on the innovative design of temperature control disc and sliding adiabatic device, the real simulation of frost heave process of subgrade soil is realized in laboratory, and the real time monitoring of temperature distribution, overlying pressure and frost heave deformation during freezing process is realized. Finally, the reliability and effectiveness of the system are verified by the results of the frost heave test of saturated silty clay, and the characteristics of temperature distribution and the law of frost heave deformation in the process of soil freezing are clarified.
【作者單位】： 福州大學(xué)土木工程學(xué)院;哈爾濱工業(yè)大學(xué)交通科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目資助(51578200,51408163) 福州大學(xué)科研啟動(dòng)基金項(xiàng)目資助(510406)
【分類號(hào)】：U416.168
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本文編號(hào)：1812961