青藏铁路多年冻土区片石通风路堤施工技术

结合工程实例详细介绍青藏铁路高原多年冻土地段片石通风路堤的参数选择、施工方法以及保证措施.通过以上的施工技术,取得了相应的阶段性成果:片石路基片石层顶面、底面与路基基底位置处地温分别低于普通路基相同位置处地温,片石路基有利于降低路基地温,是一种有效的主动保护多年冻土工程措施;片石路基在调节路基阴阳坡地温起到了积极的作用,减轻了路基地温不对称性的发生;对比片石路基和普通路基的路基变形量,片石路基的变形量相对较小.

The Construction Techniques of Air-Convection Embankment with Crushed Rock in the Permafrost Regions of Qinghai-Tibet Railway

In this paper,through engineering examples,the preferences,construction methods and safeguard measures of the crushed-rock embankment in the permafrost regions of Qinghai-Tibet railway are described in detail.Applying those engineering techniques,at present,the following results are obtained: the ground temperatures on the top and at the bottom of an embankment made of crushed rock are all lower than those of common embankment,so the crushed rock embankment is of great advantage of decreasing embankment temperature,and becomes an effective and initiative engineering measure to protect permafrost;the crushed rock embankment can actively adjust the temperature difference between south slop and north slop,and mitigate the asymmetry of ground temperature;the deformation of the crushed rock embankment is less than that of common embankment.