Research on Design Method and Construction Technology of Weak Expansive Soil Subgrade
Because expansive soil has the characteristics of water absorption expansion and water loss shrinkage,it is easy to play a greater destructive role in the process of engineering construction.In order to ensure the engineering quality,it is necessary to effectively prevent the harm of expansive soil.The characteristics and classification of expansive soil are expounded and analyzed,and the design method and construction technology of weak expansive soil subgrade are summarized.Taking a highway as an example,the attenuation of dry density and the quality of rolling construction of weak expansive soil subgrade are analyzed.The results show that the dry density value decreases with the increase of age,and the degree of compaction also decreases with the increase of age,and the degree of attenuation increases gradually.The number of rolling times is not the more the better,and the appropriate number of rolling times can be determined according to the stability of soil density.
expansive soilsubgrade designdry densitydegree of compaction
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