Water insulation roadbed structure

The invention provides a water insulation roadbed structure. The water insulation roadbed structure comprises a black cotton soil roadbed base, at least two first water insulation layers located on the two sides of the base and connected with the base, and a second water insulation layer located at the top of the base and attached to the tops of the at least two first water insulation layers. By the adoption of the water insulation roadbed structure, water and gas exchange between the atmosphere and black cotton soil in the roadbed base can be stopped, it is guaranteed that the black cotton soil in the roadbed base is not affected by atmosphere rainfalls and evaporation, the water content of the black cotton soil in the roadbed base is kept stable, and therefore the stability of a roadbed is guaranteed. 本发明提供了一种隔水路基结构，该隔水路基结构包括：黑棉土路基基底；位于所述基底两侧、且与所述基底相连的至少两处第一隔水层；位于所述基底顶部、且与所述至少两处第一隔水层顶部贴合设置的第二隔水层。采用本发明提供的路基隔水结构，能够阻断大气和路基基底中的黑棉土进行水气交换，保证路基基底中的黑棉土不受大气降雨和蒸发的影响，使得路基基底中的黑棉土的含水量保持稳定，从而保证了路基的稳定性。