Abstract：The aging process of Jinkou municipal refuse landfill in Wuhan city，China，is still in the unstable period，and it will greatly influence the foundation and security of the large-scale refuse transfer station which will be built on the landfill. Based on indoor geotechnical experiments，in-situ plate loading test and slope reverse analysis，the compressibility and the bearing capability and shearing strength of refuse soil are studied，and the refuse soil is defined as a kind of special loose cohesionless soft soil with organism and a great deal of fiber. The refuse soil is of high compressibility，uneven settlement characteristic，and high bearing capacity and shear strength. Foundation types for this case is discussed，the large-diameter bored pile foundation is chosen for the main part of project，and the raft foundation for annexes to deal with the problem of high and uneven foundation settlement. Based on the empirical formula，the negative friction caused by the settlement of landfill should be considered in the bearing capacity of piles. Based on chemical test and investigation in site，it is concluded that the refuse soil is of medium corrosively and the leachate is of intense corrosively to piles. Then，the three-level protective measures for reinforced concrete are put forward. There are plenty of pollutants of higher concentration in the leachate. After analysis on pollutant pathway to underground water in construction，major pollution-controlled measures are put forward，including whole-length steel tube timbering of bore，bentonite-mud protection of bore wall，and reduction of interval time between the ending of bore drilling and the beginning of concrete filling. Theoretic calculation shows that these measures are available to reduce the contaminated degree of underground water. There are plenty of poisonous gases in the landfill，and production of is still in the fastigium. The gases should be discharged before construction for long-term security of workmen and constructions，so a special cover layer is designed.
