As the concrete design arrangements for modern urban transport construction requirements have been improved, the construction links are relatively strict, but most of the construction team is still only stay in the use of traditional technology, while the specific design requirements and material supply is not rich enough , In order to save costs in the concrete match filled with a certain amount of coarse material, resulting in porosity in the overall structure of the large area of ??the spread, beyond the national traffic road construction requirements, especially in the rainy season of water permeability, which is caused by potholes The main reason for the lack of grass-roots leadership, resulting in the construction team is not necessary to monitor the supervision department, resulting in the separation of the mixture, serious, the road put into use, the gravel structure will exacerbate the segregation phenomenon, resulting in local aggregate relative And the interference structure between the asphalt concrete and the grassroots is also the main factor causing the phenomenon of the pit. As the local floating soil and the floating slurry are not completely removed, the whole concrete structure is mixed with the muddy material, The process, resulting in the spread of the local isolation layer, if the corresponding asphalt concrete layer of water leakage phenomenon, it will form a mud package, resulting in specific requirements of the road surface compression capacity and shear capacity of less than the expected level and effect, the internal mud Will be repeated after the road rolling out, resulting in the collapse of the overall road structure or interruption, a serious impediment to people's driving needs, is not conducive to the further completion of the cause, resulting in the accumulation of late repair work, greatly increased the unnecessary costs Capital investment, is not conducive to the further implementation of national sustainable development strategy.
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