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Qinghai-Tibet Expressway experimental research

ISSN号：1000-0240
期刊名称：《冰川冻土》
时间：0
分类：U412.1[交通运输工程—道路与铁道工程] U412.366[交通运输工程—道路与铁道工程]
作者机构：[1]State Key Laboratory of Frozen Soils Engineering, Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
相关基金：The QTE EDP was funded by the Western Project Program of the Chinese Academy of Sciences （Grant No. KZCX2-XB2-10）; Major Program of the National Natural Science Foundation of China （Grant No.40730736）; National Science Foundation for Distinguished Young Scholars of China （Grant No. 40625004）

作者： Wei Gu QiHao Yu Jin Qian HuiJun Jin JianMing Zhang[1]

关键词：高速公路网规划, 青藏高原, 高速公路路基, 多年冻土, 冻土路基, 实验, 工程基础, 试验示范项目, permafrost Qinghai-Tibet Expressway mitigative measures experimental demonstration project

中文摘要：

作为在中国计划的国家高速公路网络的一部分，到拉萨的从 Golmud 的Qinghai西藏高速公路( QTE )将越过永久冻土 lands.Due 的大约 630 km 在Qinghai西藏高原( QTP )的内部被造到在设计基础和永久冻土之间的有问题的相互作用， QTE 的结冰土壤路基将为长期的热、机械的稳定性 w 由于更宽的黑 surface.The 设计和构造受到更强烈的热骚乱

英文摘要：

As one part of the National Highway Network Planning in China, the Qinghai-Tibet Expressway （QTE） from Golmud to Lhasa will be built in the interior of the Qinghai-Tibet Plateau （QTP） across about 630 km of permafrost lands. Due to the problematic interactions between the engineering foundations and permafrost, the frozen-soil roadbed of the QTE will be subjected to the more intense thermal disturbances due to the wider black surface. The design and construction for long-term thermal and mechanical stability will face more severe challenges than those in ordinary highways and railways in the same region. In order to provide scientific support for cold regions engineering practices, the QTE Experimental Demonstration Project （EDP） was constructed in situ in the vicinity of the Beilu＇he Permafrost Station in the interior of the QTP. In this paper, the anticipated problems of the proposed QTE project are enumerated, and the structures of the test sections for QTE EDP are described. Through numerical simulations, it was found that the heat transfer processes occurring in each specific road structure are significantly different. The heat accumulation in the highway embankment is mainly due to the black bituminous pavement, but in the railway embankment with its gravel surfaces, it mainly comes from the side slopes. As a result, the net heat accumulation of the highway embankment is three times higher than that in the railway. In expressway, the heat accumulation is further increased because of the wider pavement so that significantly more heat will be accumulated in the roadbed beneath the centerline area. Thus, the thermal stability of the fro- zen-soil roadbed and the underlying permafrost of the QTE can be seriously threatened without proper engineering measures protection against thawing. Based on research and practical experiences from the operating Qinghai-Tibet Railway （QTR） and the Qinghai-Tibet Highway （QTH）, combined with the predicted characteristics of heat transfer in an expressway e

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