热棒在青藏高原风火山地区的实测效果分析

ANALYSIS ON MEASUREMENT RESULT OF PROBES IN FENGHUOSHAN AREA OF QINGHAI-TIBET PLATEAU

热棒作为一种主动保护多年冻土的有效措施,在青藏铁路及其他一些有多年冻土的现场得到了广泛的应用。介绍了青藏高原风火山试验路基中使用热棒的一些基本情况,详细地分析了热棒的工作状态及热棒周围土体地温场的变化,现有观测数据表明热棒的传热影响范围将随热棒工作时间的延长而扩大,试验热棒对降低基底地温、保护多年冻土具有较明显的效果,可以在多年冻土区应用。

The thermal probes,as a kind of effective method to protect permafrost actively,are used widely in Qinghai-Tibet railway and some other places with permafrost distributed. Some basic situations are presented about the thermal probes used in Fenghuoshan test subgrade of Qinghai-Tibet plateau,and analysis is made on its operation state and the change of ground temperature field around it. Finally,it is concluded that the thermal probes are effective to decrease the base temperature and to protect permafrost,and thus it can be used in permafrost regions.