Abstract:With the rapid development of the national economy, the highway construction mileage is increasing year by year. By the end of 2021, the total construction mileage of all kinds of highways in China ranks first in the world. In the next few years, China"s urbanization process will still maintain a rapid speed, new buildings, roads, bridges and other infrastructure will increase steadily, and there is a great demand for subgrade filler. At the same time, the amount of construction waste soil produced in the construction of various infrastructure projects in urban development is also increasing. The statistical data as of 2021 show that the annual amount of construction waste soil in China is about 3.5 billion tons, accounting for more than 1 / 3 of the total amount of urban waste, and its growth rate is still growing rapidly. On the one hand, there is a shortage of subgrade filler, on the other hand, it is difficult to dispose of waste earthwork. The utilization of waste earthwork filler has become a method of resource transformation and utilization. Combined with the reconstruction project of shangyu gaibei Daoxu section of national highway 329, this paper studies the reuse of waste earth to fill the subgrade, and analyzes the applicability of the waste soil mixed with ash in the soft foundation and rainy sections in eastern Zhejiang, so as to provide a useful technical reference for the filling construction scheme of ash mixed improved soil subgrade in the future.
