【摘要】 多年冻土区修筑道路工程后,由于受坡向的影响,不同道路走向的路基两边坡热状况不同,从而导致路基下伏冻土的融化形态不同。鉴于青藏高原独特的自然环境以及实测地温和气象资料获取的困难性,根据青藏铁路沿线有限的实测地温,通过统计的方法建立不同道路走向路基阴阳坡浅层(0.5m)地温差与太阳辐射差的回归方程,并对该回归方程进行验证。结果表明,回归方程能较好反映北麓河地区不同走向铁路路基两边坡的年平均温差,并可为高原多年冻土区道路建设和维护提供可靠的科学依据及保障。更多还原

【Abstract】 The temperature variations are the hot issues in freeze soil mechanics. After roadbed being built in permafrost regions,there will be dissimilar thermal regime on slopes because of different roadbed orientations,which will lead to distinct thawing morphologies under the embankment. In view of the specific natural environment of Qinghai—Tibet Plateau,field monitored ground temperature and meteorological data are difficult to obtain,therefore a regression equation by statistics method between the temperature difference of shallow ground(0.5m) and solar radiation difference on slopes is adopted,and the equation is validated,which can better disclose the mean annual temperature difference on slopes of railway roadbed along different routes in Beiluhe. The equation may provide the dependable science basis for the road construction and maintenance on permafrost regions of plateau.更多还原