CAJ | 학술논문

在青藏铁路五道梁低温冻土区进行了片石护道路基新结构和土护道路基结构的实体工程试验,以确定路基修筑对温度场的影响.对测试断面冻融循环的地温监测资料的分析表明,2004年片石路基左右路肩孔冻土上限处,年平均地温分别低于土护道路基相应位置0.12 ℃和0.14 ℃,2005年片石路基左右路肩孔分别低于土护道路基相应位置0.65 ℃和0.03 ℃,冻土上限以下地温均呈逐年下降趋势.片石护道和土护道路基冻土上限均存在不对称性,但随着时间发展,片石护道路基最大融化深度位置基本接近或超过天然地面,且冷生过程还在继续.该区域的片石护道路基新结构能够有效发挥降低地温、主动保护多年冻土的作用.
재청장철로오도량저온동토구진행료편석호도로기신결구화토호도로기결구적실체공정시험,이학정로기수축대온도장적영향.대측시단면동융순배적지온감측자료적분석표명,2004년편석로기좌우로견공동토상한처,년평균지온분별저우토호도로기상응위치0.12 ℃화0.14 ℃,2005년편석로기좌우로견공분별저우토호도로기상응위치0.65 ℃화0.03 ℃,동토상한이하지온균정축년하강추세.편석호도화토호도로기동토상한균존재불대칭성,단수착시간발전,편석호도로기최대융화심도위치기본접근혹초과천연지면,차랭생과정환재계속.해구역적편석호도로기신결구능구유효발휘강저지온、주동보호다년동토적작용.
The engineering experiments of subgrade with rock or soil berm were carried out in Wudaoliang low temperature frozen ground of Qinghai-Tibet railway to examine the new style subgrade structure cooling effect on subgrade temperature field. The ground temperature monitoring result of test section after several freezing-thawing cycles showed that ground temperature in the left and the right shoulder hole of subgrade with rock berm were 0.12 ℃ and 0.14 ℃ lower than that of general subgrade with soil berm in 2004, and 0.65 ℃ and 0.03 ℃ lower in 2005. The temperature below thawing-freezing depth behaved descending tendency annually. The 0 ℃ temperature contour was asymmetrical. As time goes on, the thawing-freezing depth of subgrade with rock berm rises near to the ground surface or above it with cold effect. The new structure style of subgrade with rock berm in this area of Qinghai-Tibet railway could reduce ground temperature and protect permafrost.