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Highway construction scale and expanding the number of land , the expansion and renovation of the old road is increasingly becoming the new direction of development and need . Old road expansion and renovation of our land can not only ease the tension and economic energy conservation can also play a role . The combined disposal Qingdao Highway 1 widening project actual gravel pile , grille gravel mattress layer , the preloading consolidation drainage composite disposal program , and test of the system in the construction process research . Detection analysis results show that : the expansion and renovation of the old road , the combined disposal of soft ground , fast, economical , convenient and effective features , provides a practical method for such projects . In relying on the actual disposal of the effect of Qingdao Highway 1 , through in-depth analysis of the data measured subgrade settlement , summed up the coastal the soft subgrade old Road broaden the transformation process of the construction process and disposal measures , designed to guide similar to the construction of the highway .
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