Research on Bearing Mechanical Property Test of Highway Subgrade under Soil Improvement—Taking Qingyuan-Yunfu Expressway as an Example
In order to study the bearing mechanical changes of the weak subgrade on Qingyuan-Yunfu Expressway under the influence of different improvement designs and physical environments,this paper adopts mechanical test methods to conduct macroscopic analysis of stress and strain of the improved soil samples under five kinds of modifiers and different dry-wet paths.The test shows that the type of modifier will not change the strain development characteristics of the sample,the bearing stress of the cement curing agent sample is the highest,and the bearing capacity of the foam curing agent sample is the weakest.Under the dry-wet path,the influence of confining pressure on strain characteristics is greater than that of dry-wet path.The larger the difference of water content change under dry-wet path,the lower the peak stress and the larger the confining pressure,which will limit the weakening effect of dry-wet effect on bearing stress.
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