石灰改良潮湿黏性土的路用性能研究OA

Due to environmental effects,subgrade fill with high moisture content cannot be directly used for subgrade filling,thus delaying the construction progress.Therefore,research on the road performance of modified moist clayey soil is of significant engineering importance.By preparing soil samples with different moisture contents,lime contents and soaking conditions,the California Bearing Ratio(CBR)was adopted as the evaluation index to quantitatively study the road performance of lime-improved moist clayey soil.The results indicate that lime has an obvious im-provement effect on the CBR value of moist clayey soil.Under the conditions of optimum moisture content and rela-tively high moisture content,1％lime content can meet the requirements of subgrade filling.When the moisture content increases to the natural moisture content,the CBR value of the improved soil cannot meet the road perfor-mance requirements;Compared with the soaking condition,the CBR value of the improved soil under the non-soaking condition is significantly increased.Under the optimum moisture content and relatively high moisture con-tent conditions,the non-soaking condition has a significant improvement effect on the CBR value of soil samples with 3％and 5％lime content;For actual working conditions with high natural moisture content,the moisture con-tent of fill can be reduced to near the optimum moisture content by means of air drying and mixing with dry soil,and then combined with lime stabilization and sealing measures to ensure that subgrade fill meets the specification re-quirements.These research results can provide a reference for subgrade engineering construction in moist clayey soil areas and shorten the project construction period.