高原多年冻土隧道施工温度场控制的主要因素

The Main Factors Controlling the Temperature Field during Tunneling in Permafrost Regions

施工温度场的控制对于多年冻土隧道的施工有着重要的意义,结合青藏铁路昆仑山、风火山隧道的设计与施工,通过对施工过程中环境温度的测试,综合分析冻土稳定、混凝土施工、施工人员及施工机械等各方面的因素对施工环境温度的要求,提出了适合于青藏铁路高原多年冻土隧道的施工环境温度控制范围。

To control the temperature field is significant during tunneling in permafrost. Based on the design and construction practice of the Kunlunshan Tunnel and Fenghuoshan Tunnel in the Qinghai-Tibet Railway and the measurements of surrounding temperature during tunneling, the re-quirement of surrounding temperature for perma-frost stabilization, for concrete placing, for con-struction staff and for construction machinery when tunneling are analyzed in this paper. A surrounding temperature range available to tunneling in permafrost is also proposed to the Qinghai-Tibet Railway.