【摘要】 为解决寒区隧道冻害防治效果与能源消耗之间的矛盾,设计了利用地温能的隧道加热系统,利用隧道中部深埋段围岩自身的地温能经地源热泵提升后对洞口段衬砌和保温水沟进行加热,其由取热段、加热段、热泵和分、集水管路组成。文章以内蒙古扎敦河隧道为工程依托,提出了利用地温能的隧道加热系统加热段长度、供热负荷和取热段长度的设计计算方法,分析了循环介质入口温度和流量对换热量的影响;结合隧道工程的结构特点和施工工艺,提出了利用地温能的隧道加热系统的施工工艺,并归纳总结了利用地温能的隧道加热系统的质量控制措施,对在寒区隧道中推广应用该技术具有重要作用。更多还原

【Abstract】 To solve the contradiction between frost damage prevention and energy consumption for tunnels located in cold regions, a geothermal energy based heating system-consisting of heat-absorbing section, heating section, heat pump and distribution and collection pipes-was developed. This system allows the lining and the insulation ditch at the portal section to be heated by geothermal energy extracted from deep buried surrounding rocks at the middle section using a heat pump. Based on this system, using the construction of the Zhadun river tunnel as an example, this paper provides calculation methods for the heating section length, heating load and heat-absorbing section length; analyzes the influences of the flow rate and inlet temperature of the circulating medium on the heat exchange rate; proposes construction methods based on tunnel structure characteristics and construction technology; summarizes relevant quality control measures.更多还原