Abstract: With the development of urbanization, the methods of mountain cutting, and trench filling are more common in the southwest mountainous area, which is bound to form many landfilling sites. The settlement performance of landfilling sites is an engineering construction concern. In this paper, the site settlement was estimated through drilling, acoustic wave velocity testing and other in-situ testing means as well as using a large number of engineering analogy analysis. At the same time, the deformation modulus of the engineering site and the later possible deformation were also estimated and compared with the actual monitoring results. Although the estimation results are greater than the monitoring results, but it does not affect the overall judgment of the project. After comprehensive analysis, it is concluded that stone cast-fill with good uniformity can be used as the foundation site of power line tower after proper treatment of the shallow surface foundation soil when the filling life is more than 5 years. The estimation and analysis methods of this paper can be used as a reference for the estimation and analysis of similar engineering.

Key words: End-Dump Backfill Soils, Settlement, Engineering Analogy Analysis, Power Lines