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青藏铁路第七标段多年冻土路基按保护冻土原则进行设计,高含冰量冻土地段采用片石通风路堤、通风管路堤、保温护道等措施减少冻土扰动,缩小冻土融化沉降范围;采用换填保温层、设置挡水埝、U型水沟等防排水保温措施,使冻土路基重建热量平衡系统,满足了多年冻土路基质量要求。
The permafrost subgrade at the Seventh Section of Qinghai-Tibet Railway is designed according to the principle of protection of frozen soil. By using such measures as stone ventilated embankment, ventilation pipe embankment and thermal insulation road to reduce the disturbance of permafrost, the frozen subsidence range of frozen soil is reduced; Replace the insulation layer, set water retaining 埝, U-shaped drainage ditch insulation measures to make the frozen roadbed reconstruction thermal balance system to meet the permafrost subgrade quality requirements.