Construction Improvement Technology of Subgrade Filling in Expansive Soil Environment for Municipal Road
The municipal road subgrade is the bottom structure of road engineering,which is the load-bearing foundation of the entire road and should have sufficient strength and stability.If the expansive soil environment is not properly treated and directly filled,it can lead to settlement and deformation of municipal roads,road cracking,and even landslides under the influence of severe cold weather,seriously threatening road driving safety.In order to improve the construction technology of filling roadbeds under the expansive soil en-vironment in the severely cold region of Northeast China,innovative methods such as the best lime content experiment,the determina-tion of the best compaction time,and the construction of test sections on site were adopted;And applied in the construction of municipal roads on Dingxiang Avenue in Harbin.The following conclusion has been drawn:the optimal lime content for treating expansive soil en-vironment is 6%,the optimal lime filling time is2 hours,and the strength of roadbed soil at different ages has been tested through un-confined compressive strength experiments,and its strength meets the requirements.
municipal expansive soil environmentsubgradefilling constructionoptimal sealing time
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