| 摘要: |
| 本文搭建了隧道围岩土壤蓄放热特性缩尺模型实验台，在实验台验证模拟准确性的基础上，用CHAMPS-BES软件建立与实验台等比例（1:1）的物理模型并进行模拟，研究隧道空气温度、围岩盾构、土壤温度对土壤蓄放热的影响规律。结果表明：隧道空气温度越高，土体年净蓄热量越大，同时土体的蓄热能力随土体温度升高而逐渐减弱，土体的蓄热能力在15年内的衰减由前期的每年净蓄热量衰减24%逐渐降至4%；不同区间盾构边界条件下模拟的年净蓄热量差异在5%以内，因此可以忽略区间盾构厚度和盾构导热系数对土体蓄放热的影响；土体初始温度越低，蓄热能力越大。初始温度为9 ℃的土体蓄热量约为初始温度为22 ℃的土体蓄热量的5倍。 |
| 关键词: 地铁隧道 围岩土体 蓄放热 空气温度 土体参数 |
| DOI： |
| 投稿时间：2019-05-15 修订日期：2019-09-29
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| 基金项目:国家自然科学基金（51878408）资助项目 |
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| Analysis of Influencing Factors on Soil Heat Storage and Release Potential in Long Period Evolution of Subway Tunnel |
| Wang Lihui,Zhang Jihua,Du Zhiping,Zheng Yi,Song Jie,Zou Xuecheng |
| (School of Environment and Architecture, University of Shanghai for Science and Technology;Shanghai DFYH Tech Services Co., Ltd.;Shanghai Shentong Metro Co., Ltd.) |
| Abstract: |
| In this study, a scale model experiment platform was built for soil heat storage and release characteristics of a tunnel surrounding rocks, and a physical model (1:1) was built and simulated using CHAMPS-BES software. Comparing the simulation results with the experimental results of the temperature field, heat storage, and heat release of the tunnel surrounding the rock mass, it is found that for a higher air temperature of the tunnel, the annual net heat storage of the soil is greater, and the heat storage capacity of the soil gradually decreases with an increase in the soil temperature. The heat storage capacity of the soil is attenuated within 15 years and annual net heat storage gradually decreases from 24% to 4%. The difference in annual net heat storage simulated under different shield boundary conditions is less than 5%, hence the influence of the interval shield thickness and shield thermal conductivity on the soil heat storage and discharge can be neglected. In the initial condition, for a lower temperature, the heat storage capacity of the soil is greater. The stored heat in the soil at an initial temperature of 9 ℃ is approximately 5 times that at an initial temperature of 22 ℃. |
| Key words: subway tunnel surrounding rock heat storage and release air temperature soil parameters |
