深埋地下洞室传湿量的计算方法研究

发布时间：2018-06-19 01:22

本文选题：传湿 + 地下洞室　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：随着城市化和城镇化进程不断加快,大力开发利用地下空间资源尤其是深部空间资源,是社会发展的必然趋势。地下洞室群中,如地下水电站、地铁或人防工程及国防工程中环境湿度计算及控制问题是目前尚有待于进一步研究解决的问题。湿环境对洞室内人员健康和机电设备的使用寿命有重要影响。深埋地下洞室不同于地上建筑,受地形地貌及其它因素影响较大,不受阳光照射,壁面渗透传湿影响较大。本课题中考虑因埋深变化导致的湿度和压力梯度变化(暂不计入温度影响),分析压力梯度对传湿的影响,提出了深埋地下洞室传湿计算方法。通过对地下洞室壁面质传递过程(以土壤、砂石为例)分析,基于质传递理论方法,提出了地下洞室壁面传湿和洞室埋深之间的关系式,获得了洞室壁面传质系数随洞室埋深变化规律。2014年7月对河北石家庄张河湾抽水蓄能电站交通洞进行实地测试,测试得出交通洞环境、物性等参数,将传质系数理论方程运用到张河湾电站中。取张河湾电站交通洞壁面一指定区域,通过理论方程计算得出所选壁面区域通过渗透作用的质量流量,并将其与Fluent数值模拟所得质量流量进行对比,验证方程正确性。该研究为工程中科学计算地下洞室湿负荷、改善地下建筑湿环境提出了理论依据。
[Abstract]:With the acceleration of urbanization and urbanization, it is an inevitable trend of social development to develop and utilize underground space resources, especially deep space resources. The calculation and control of environmental humidity in underground caverns, such as underground hydropower stations, subway or civil air defense projects and national defense projects, are still to be further studied and solved. The wet environment has an important effect on the health of the personnel and the service life of the electromechanical equipment in the cavern. The deep buried underground cavern is different from the above ground building, which is greatly influenced by topography and other factors, not exposed to sunlight, and the wall permeation and moisture transfer is greatly affected. In this paper, the change of humidity and pressure gradient caused by the change of buried depth is considered. The influence of pressure gradient on moisture transfer is analyzed, and the calculation method of moisture transfer in deep buried underground cavern is put forward. Based on the analysis of the mass transfer process of underground cavern wall (taking soil, sand and stone as an example) and based on the theory of mass transfer, the relationship between the wall moisture transfer of underground cavern and the buried depth of underground cavern is put forward. The variation law of mass transfer coefficient on the wall of the cavern with the buried depth of the cavern was obtained. In July 2014, the traffic tunnel of Zhanghewan pumped Storage Power Station in Shijiazhuang, Hebei Province, was tested on the spot, and the traffic tunnel environment, physical properties and other parameters were obtained. The theoretical equation of mass transfer coefficient is applied to Zhanghewan Hydropower Station. In this paper, the mass flux of the selected wall area through permeation is calculated by taking a specified area of the traffic wall surface of Zhanghewan Hydropower Station, and compared with the mass flow rate obtained by fluent numerical simulation, the correctness of the equation is verified. The research provides a theoretical basis for the scientific calculation of the wet load of underground caverns and the improvement of the wet environment of underground buildings.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU962

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