摘要
寒区隧道修建的技术问题比一般地区要复杂得多,其中一个关键问题是这些地区一般要受到冻融、冻胀状态的影响。这两种状态周期性的交替变化将造成隧道结构的破坏。隧道处在何种状态可由隧道衬砌与围岩温度场的变化情况得出。通过对寒区隧道温度场的计算分析,确定隧道开挖前后围岩温度场的变化情况,为隧道采取相应的防冻技术措施提供依据。考虑相变潜热情况下对雀儿山隧道围岩瞬态温度场进行数值计算分析,确定隧道开挖前初始地温场。计算和预测隧道围岩在正常运营通风条件下的温度场变化,得出不同情况下保持隧道衬砌与围岩100年不冻的隔热层敷设厚度。
The technical problems,cold tunnel construction than general area is much more complex,one of the key problems is subject to these areas are often freezing-thaw and frost heaving state influence,the two states cyclical variations will cause the destruction of tunnel structure,tunnel in tunnel lining what state of surrounding rock by with the change of temperature field is obtained.Through the tunnel of cold temperature field analysis and calculation to determine rock tunnel excavation of temperature field before changing conditions and take appropriate anti-freeze for tunnel provide a basis for the technical measures.Phase change of latent cases of surrounding rock Queershan transient temperature field numerical calculation and analysis is considered.To determine the tunnel excavation before initial geothermal field,the surrounding rock under normal operation ventilation conditions temperature changes is calculated and forecasted,obtained the thermal insulation layer thickness under different conditions of laying which keep tunnel lining and rock 100 years don′t frozen.
出处
《科学技术与工程》
2011年第18期4262-4267,共6页
Science Technology and Engineering
基金
交通部西部交通建设科技项目资助
关键词
雀儿山隧道
瞬态温度场
相变潜热
隔热层
Queershan tunnel the transient temperature field phase change of latent heat the thermal insulation layer
