Abstract: In the early planning stage of land reclamation in Yan’an New Area, some geotechnical engineering experts proposed suggestions on the engineering geological hazards that Yan’an New Area will face. Currently, the first phase of the earthwork construction in Yan’an New Area has been completed for about 7 years. Based on the initial suggestions and monitoring results after the construction completion, the Pingshan land reclamation project in Yan’an New Area has achieved success. This article summarizes the theoretical and practical experience of loess high fill. At the same time, a review and an analysis were conducted on the handling of key and difficult issues in various stages of the earthwork. Experience was summarized on the key and difficult issues of geotechnical engineering that have received great attention from several aspects, such as quality control of the backfill operation, design of the high slope treatment, design of the underground drainage body, the treatment of collapsible loess, and the foundation treatment of the gully bank slopes. This provides a guidance and a reference for similar projects in the future.

Key words: Quality Control, Backfills, High Slope, Collapsible Loess, Drainage system