| The longitudinal cracks have become the main subgrade distress type in the permafrost regions, and there is not a effective solution now. Synthesized the domestic and international current result,the paper presents the geogrids and flexible beams treating technology to ravel out the distress of the longitudinal cracks.In this paper, the geogrids structure,the flexible beams strucrure,the geogrids and flexible beams structure are analysed with ALGOR, and it is used to analys the influence of some paramenters.such as the modulus of structural layers, size of structure,place of structure, non-uniform settlements.And the contrast of the three structures is analysed in this paper.we can see the reasonable size and reasonable place through analyse.The analyse of the test road show that the structures worked well for about two years and the reflection cracks have not be found.At the end of the paper,based on the theory analysis and the result of the test road,a design method is introduced,and a further conceive is put forward. |
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