發(fā)布時(shí)間：2018-10-13 14:42

【摘要】：基于熱棒的工作原理,結(jié)合唐古拉山凍土區(qū)的道砟填土路基,考慮熱棒材料本身的高導(dǎo)熱性、陰陽坡、凍土相變等因素,采用有限單元法計(jì)算分析熱棒對(duì)填土路基的降溫效果。研究結(jié)果表明:第1年熱棒運(yùn)行結(jié)束后在路基陽坡下方形成直徑大約為8.6 m、溫度低于-0.5℃的低溫區(qū);右坡腳(陰坡)下形成直徑大約為9.6 m、溫度低于-0.5℃的低溫區(qū),并在低溫區(qū)內(nèi)熱棒周圍形成了溫度低于-3℃的條形低溫核;第3年路基下方靠近陰坡位置形成溫度低于-0.8℃的低溫區(qū),熱棒起到了很好的制冷效果,保證路基下伏凍土不融化,從而保證路基的穩(wěn)定性。
[Abstract]:Based on the working principle of hot bar, combined with the roadbed of ballast fill in the frozen soil area of Tanggula Mountain, considering the factors such as high thermal conductivity of heat bar material itself, yin and yang slope and phase change of frozen soil, the cooling effect of hot bar on fill subgrade is calculated and analyzed by finite element method. The results show that the diameter of the hot bar is about 8.6 m and the temperature is lower than -0.5 鈩，

本文編號(hào)：2268991