市政技术2024，Vol.42Issue(4)：31-37,7.DOI:10.19922/j.1009-7767.2024.04.031
能源隧道附近非饱和土行为的数值模拟评估
Numerical Simulation Assessment of the Unsaturated Soils Behavior Nearby the Energy Tunnel
摘要
Abstract
Geothermal energy can be utilized by installing heat exchange devices in tunnel lining for heating of cooling for the upper building of the tunnel.But thermal activation can affect the degree of saturation of surrounding soil to cause deformation of water sensitive soil such as expansive soil,which may affect the stress state of the tunnel struc-ture.This study conducted a numerical analysis of heat and moisture transfer in the soil around energy tunnels.A 3D finite element model was developed to study the influence of soil type and groundwater level on the hydraulic behavior of energy tunnels.The influence of soil saturation on heat transfer efficiency was deeply studied.When the ground-water level is higher than the tunnel,the effect of natural convection on heat transfer should be taken into account.When the level is lower than the tunnel,it is not appropriate to assess heat transfer efficiency by the simplified dry assumption.The results can be used for thermal activation evaluation of energy tunnels in unsaturated regions.关键词
能源隧道/非饱和土/水热迁移/数值模拟Key words
energy tunnel/unsaturated soil/heat and moisture transfer/numerical simulation分类
能源与动力引用本文复制引用
马春景,洪海件,喻卫华..能源隧道附近非饱和土行为的数值模拟评估[J].市政技术,2024,42(4):31-37,7.基金项目
广东省住房和城乡建设厅研究开发项目(2023-K9-240562) （2023-K9-240562）
广州市建筑集团有限公司科技计划项目(BH20230317604) （BH20230317604）
