高海拔粒料基层沥青路面性能研究

为解决西藏公路半刚性基层易产生冻害和反射裂缝等病害缺陷,并考虑充分利用西藏当地筑路材料,对高寒高海拔地区粒料柔性基层沥青路面性能进行研究,必将对西藏公路的建设有重要的现实指导意义,使路面结构更经济更耐用,促进筑路技术的发展.通过分析西藏国道318日喀则至拉孜段粒料基层沥青路面试验路的材料组成及检测结果,评价粒料基层在高海拔地区的路用性能.从冻融稳定性、路用承载力两方面分析高海拔粒料基层沥青路面路用性能控制要素.

Research on Performance of Granular Base Asphalt Pavement in High Altitude

In order to solve the defects of frost damage and reflective crack that is easy to happen in semi-rigid base pavement in Tibet,and taking full advantage of the materials in the local road,it will have important realistic significance to the highway construction in Tibet to study on the performance of granular base asphalt pavement in high altitude area.It can make the pavement structure more economy and durable,and can also promote the development of road construction technology.Through analysing the material composition and test results of ranular base asphalt pavement experiment road of highway 318 from Shigatse to Lazi in Tibet area,the author appraises the performance of granular base asphalt pavement in High altitude area.It also analyses the road performance control elements of granular flexible base asphalt pavement in High altitude in the aspects of the freeze-thaw stability and road bearing capacity.