【摘要】 基于热棒工作原理及已有的研究成果,依托青藏公路整治改建工程实施大规模热棒试验工程。介绍青藏公路多年冻土区公路路基热棒试验情况,通过现场设置观测装置观测地温变化,分析研究热棒的工作状态、冷却路基效果及对冻土热稳定性的影响。1年观测结果表明,进入大气负温期后,热棒开始工作,路基及基底土体冷储量显著增加,且总增加量随冻结期增长;热棒影响范围内,距离热棒越远,冷量增长期越滞后且增幅越小,符合一般规律;路基工程中使用热棒保护冻土和改善路基热稳定性是有效的。更多还原

【Abstract】 Based　on　the　work　principle　of　heat　pipe　and　it’s　research　result,this　paper　describes　the　test　conditions　of　heat　pipe　used　for　permafrost　subgrade　of　Qinghai-Tibet　highway.A　large　scale　of　heat　pipe　testing　was　made　into　practice　in　the　project　of　the　treatment　and　reconstruction　of　Qinghai-Tibet　highway,according　to　the　various　earth　temperature　data　from　the　site　observation　unit,the　work　conditions　of　heat　pipe,it’s　effect　and　the　influence　on　the　stabilization　of　the　frozen　soil　were　analyzed.The　first　year　observation　result　shows　that　once　the　atmosphere　temperature　is　below　temperature　of　frozen　soil,the　heat　pipe　would　work　and　the　contained　cool　of　the　subgrade　and　the　foundation　soil　body　increase　obviously.The　total　cool　will　increase　with　growth　of　the　frozen　period.In　the　influencing　range　of　the　heat　pipe,it　is　the　general　principle　that　the　longer　distance　from　the　heat　pipe,the　later　the　cool　increasing　and　the　less　the　cool　contained.The　research　result　indicates　that　the　heat　pipe　can　be　used　effectively　in　the　subgrade　construction　to　protect　the　frozen　soil　and　improve　the　heat　stabilization　of　subgade.更多还原