摘要
为了精确计算地下工程岩土环境下的传热问题,建立了第一类和考虑辐射影响的第三类边界条件下地下工程岩土初始温度场模型。开发了地下工程岩土初始温度场软件,避免了复杂的测量过程。通过与南京地区实测数据比较,证明了该理论模型和软件的正确性。结果表明,第三类边界条件下温度场需要一定的时间才能稳定并与实测值相符。对于南京地区,至地下15m左右处年温度波动趋于消失。岩土表面与周围大气对流换热系数对于浅层的岩土温度场影响较大,随着深度的增加,其值对岩土温度场的影响减小。
To calculate the heat transfer in rock and soil for underground engineering accurately, the initial temperature profile mathematical model of rock and soil for underground engineering with the first and third boundary conditions was derived. Based on this, a toolkit for calculating the initial temperature profile was developed to compute the soil and/or rock temperatures at different depths and time which avoided the difficulties in the field test. Finally, the toolkit was validated by the measured data in Nanjing. The results show that it may take some time for the third kind boundary condition to achieve the measured results, that the annual temperature fluctuate disappears at the depth of about 15 m in Nanjing, that the convection heat transfer coefficient influences the temperature profile more in the shallow layer of the soil than in the deep layer and that the influence decreases as the depth increases.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2010年第2期152-157,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
地下传热
岩土环境
MATLAB
初始温度场
underground heat transfer
rock and soil environment
MATI.AB
initial temperature profile
