兰州地铁围岩热物理参数测试研究
Test Study on thermal physical parameters of surrounding rock of Lanzhou subway
摘要
本文通过采取地铁站原状土样，使用Hot Disk热常数分析仪测量，研究了兰州地铁站围岩的热物理性质。通过对不同深度试样的导热系数、热扩散系数、体积比热的测量，发现导热系数随深度增加而增加，体积比热和热扩散系数不具有明显规律；通过分析影响热物理参数的因素发现，含水量是各因素中变化最大的，于是利用烘干法调节试样含水量，研究了热物理参数随含水量变化的规律，发现兰州地铁站围岩土体试样随含水量增加土体导热系数呈线性增长，体积比热随含水量增加先降低后增高，热扩散系数随含水量增加先升高后缓慢降低。Abstract
In this paper the thermal properties of soils taken from Lanzhou subway station was studied by Hot Disk heat constant analyzer. Firstly, thermal conductivity, thermal diffusion coefficient and volume specific heat of samples from different depth had been measured, as a result, thermal conductivity increases with depth deepens，at the same time, volume specific heat and thermal diffusion coefficient have no remarkable law. With changing moisture content by drying, as the moisture content is the most changeable factor among all factors which would influence thermal properties of soils, the law of soils had been discussed. With increasing moisture content, the thermal conductivity increases linearly, the volume specific heat increases after decreasing to minimum at relatively lower moisture content, the thermal diffusion coefficient decreases slowly beyond increasing to maximum at relatively lower moisture content. 关键词
兰州地铁/导热系数/热扩散系数/体积比热Key words
The Lanzhou subway/thermal conductivity/thermal diffusion coefficient/volume specific heat引用本文复制引用
盖玉玺,甄作林,马国梁.兰州地铁围岩热物理参数测试研究[EB/OL].(2016-09-27)[2025-12-14].http://www.paper.edu.cn/releasepaper/content/201609-235.学科分类
矿业工程理论与方法论/矿山地质、矿山测量
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