摘要
根据热棒的工作原理,利用热棒制冷技术降低隧道冻土围岩的温度。结合青海省共和至玉树公路姜路岭隧道洞口段冻土地层热棒施工,介绍了热棒在隧道洞口冻土段的平面、横断面及监测元件布设情况。通过采用冻土地层热棒制冷控温,对由于隧道开挖后热扰动造成的冻土温度的升高进行有效控制,并使冻土及时回冻保持原状,确保了隧道洞口段结构安全。对以后高寒高海拔地区冻土地层的隧道洞口段施工具有推广价值。
According to the working principle of thermoprobe,the temperature of tunnel surrounding rock can be reduced by using hot rod refrigeration. A case study w as introduced in this paper. T ake the construction of Jiang Lu-Ling tunnel entrance in Gonghe-Yushu Road in Qinghai as an example. T he layout of the thermoprobes and monitoring elements in the frozen soil layer were introduced. W ith the thermoprobe cooling in the frozen layer,the temperature control was realized after the excavation of tunnels,which caused the thermal disturbance and the increase of layer temperature. Furthermore,it helped the frozen layer return back to the undisturbed situation and remain that,ensuring the safety of tunnel entrance section structure. T his technology deserved widely use in the tunnel portal construction in the cold,high altitude region.
出处
《铁道建筑》
北大核心
2014年第10期32-35,共4页
Railway Engineering
关键词
热棒制冷
多年冻土
公路隧道
高海拔
T hermoprobe cooling
Permafrost layer
Highway tunnel
High altitude
