Research On The Application Of Construction Waste In Highway Subgrade

In recent years, with the urbanization and the expansion of city scale,infrastructure construction developed rapidly. According to statistics, theconstruction waste produced each year more than two billion tons in China.Traditional way of handling most of construction waste is collected by the sanitationdepartment,and then is unified piled up open-air or land filled, which took up a lot oflands, polluted urban environmental. Construction waste regeneration technology ismature abroad, but it is a weak link in our country. From a technical point of view,realizing the construction waste resource utilization is completely feasible in ourcountry on the basis of absorbing foreign advanced technology,especially theapplication in highway engineering technology research work should be worthdeeply developed, thus promoting the construction waste resource utilization in ourcountry, improving the environment, improving the social and economic benefits andachieving green renewable development.Based on the concept of resource conservation and environmental protection,through researching and data accessing, etc.,the paper puts forward the constructionwaste classification methods and standards, classifys according to thestandards;Depended on the reconstruction and expansion engineering of XiBaohighway Epang Palace Interchange, analysis the composition of construction waste,combined with the system of indoor test, studyed the performance of constructionwaste. Using crushed building waste in filling roadbed,determining the parametersunder different rolling pass, such as subgrade settlement,rebound deflection and soon,we gets the reasonable construction machinery combination, compactiontechnology, loose laying thickness and compaction quality control methods;On thebasis of indoor and outdoor experiments,we get the the settlement of roadbedconstruction waste by embeding the advanced equipment to observepost-construction settlement of highway roadbed landfill section.By the development of the research project, succeeding to pave the entityproject and initial succeeding to use the construction waste recycled materials in highway subgrade.Studied the construction waste filling roadbed constructiontechnology and construction quality control methods, put forward the constructiontechnology, construction quality testing methods and standards of the filling roadbedconstruction waste recycled material, laid a good foundation for the large-areaapplication and promotion on the recycled materials. The results of the study notonly has guiding significance for the recycling application of construction waste, andalso has reference for the construction waste filling subgrade engineering.