摘要
为研究适用于多年冻土区高速公路的路基调控结构,对片块石-通风板复合路基、强制弥散式通风路基、通风管路基、单向导热路面-片块石路基4种新型结构,依托共玉高速公路进行了宽12.25 m的分幅示范研究。依托花大高速公路,对填土路基进行了宽24.5 m的整体式路基示范研究。研究结果表明:5种路基结构都能满足高速公路大尺度路基的调控要求,在示范过程中对其工程可行性进行了论证,提出了每种新结构的施工关键技术和控制指标,显著提升了施工效率和质量,通过2年的通车运营,示范工程全段整体技术状况良好,5种新结构目前已在青藏高速公路勘察设计中应用。
In order to research the roadbed control structure suitable for expressways in permafrost regions, four new types of roadbed structures as block stone-ventilated plate composite roadbed, forced dispersion ventilated roadbed, ventilated pipe roadbed, single heat-conducting pavement-block stone roadbed, are studied by a 12.25 m-wide demonstration study onGonghe-Yushu Expressway. And a demonstration study of thewhole embankment with a width of 24.5 m is carried outonHuashixia-Dawu Expressway.The results show that all the five kinds of subgrade structures can meet the regulation requirements of large-scale subgrade of expressway.In the demonstration, the application feasibilities are discussed, and key construction technologies and controlling index are presented for each new subgrade structure, promoting the construction efficiency and quality remarkably.After 2 year's operation, the demonstration segment showed a favorable technical situation. All the 5 new subgrade structures have been applying to the investigation and design of the Qinghai-Tibet Expressway.
引文
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