| 摘要: |
| 地铁区间隧道空气温度受围岩土体影响较大，而地铁区间隧道围岩土体温度分布又受许多因素的影响，为了更准确地得到围岩土体热库与传热的演化规律，需要了解各因素对传热的影响程度。本文采用CHAMPS-BES软件进行数值模拟，通过改变土体和空气温度对围岩传热影响的因素，利用正交实验法分析讨论各因素对围岩土体温度分布特性的影响程度和显著性，发现土壤导温系数对围岩土体热库峰值位置的影响为非常显著，当土壤导温系数为7.6×10-7 m2/℃时传热较快，连续运营20年热库厚度已超出了50 m的范围；在已有研究基础上，研究不同地区隧道围岩土体热库特性及蓄热量变化，得知地理位置越北，土体初始温度越低，对应的土体热库特性变化越显著，土体的年净蓄热量也越大，哈尔滨地区约为1023 00 MJ，相当于列车散热量的1.8％，但整体上土体年净蓄热量随着运营年限的增大而逐渐减小。 |
| 关键词: 地铁隧道 围岩土体 蓄放热 正交试验 土壤导温系数 |
| DOI： |
| 投稿时间：2018-07-19 修订日期：2018-10-07
|
| 基金项目:国家自然科学基金（51878408),上海市科学促进会联盟计划项目（LM201735）和上海申通地铁集团有限公司科研计划项目（JS-BZ15R011）资助。。 |
|
| Simulation Study on the Influence Factors of Thermal Characteristics of Surrounding Rocks in Subway Tunnels |
| Wang Lihui,Zhang Yuan,Du Zhiping,Zhang Yumeng,Gao Renyi,Zheng Yi,Song Jie |
| (School of Environment and Architecture, University of Shanghai for Science and Technology;Shanghai DFYH Tech Services Co., Ltd.;The Technological Centre of Shanghai Shentong Metro Group Co., Ltd.) |
| Abstract: |
| The air temperature in a subway tunnel is influenced by the surrounding rocks. The temperature distribution in the surrounding rock is affected by many factors. To obtain the evolution trend of the heat transfer and thermal reservoir of the surrounding rocks, we need to understand the influence of various factors on the heat transfer. In this study, the CHAMPS-BES software is used to simulate the effect of the soil property and air temperature on the heat transfer in the surrounding rocks and the significant degree of influence of various factors on the temperature distribution characteristics in the surrounding rocks using an orthogonal experimental method. We find that the influence of the soil thermal diffusivity on the peak position of the surrounding rocks is very significant. When the soil thermal diffusivity is 7.6 × 10-7 m2/℃, the heat transfer is faster, and the thickness of the heat sink for 20 years exceeds the range of 50 m. On the basis of this research, the study on the characteristics of heat storage and change of the heat storage in the surrounding rocks in different regions reveals that the soil in north area has lower initial temperature, and the annual net heat storage of the soil is greater. In the Harbin area, the annual net heat storage of the soil is approximately 102300 MJ, which is equivalent to 1.8% of the train heat dissipation. However, the annual net heat capacity of the soil gradually decreases with the increase in the operation years. |
| Key words: subway tunnel surrounding rock and soil thermal storage orthogonal test soil thermal diffusivity |
