During the design of foundation of a high-rise building with large space requirement at the ground floor, CFG piles are used in substitution for cast-in-place piles. By advanced design and construction, the project was completed successfully. In this paper, the experience was introduced according to the procedure of actual construction.

The Minneapolis bridge disaster that happened recently shows, our quality of science of bridge building taking quantitative index as main basis in use evaluates and has certain defects systematically synthetically at present, reflect the actual conditions in order to enable thinking the system can be true effectively, need to introduce into expert's system of judging, utilize its abundant experience to carry on the qualitative judgment to the bridge. This paper makes use of unascertained theory dealt with synthetically systematically to that the expert judge, the ones that avoided evaluating in the work are subjective and random, strengthen the scientific and objective fairness of evaluating the work, thus improve the authenticity of appraising the result.

Considering the various loads combination and durability,pile’s diameter,embedded depth,anchor’s rod, anchorage length need to be strengthened in the permanent supporting foundation engineering.Based on Chengdu Museum foundation project, the influencing factors such as pile’s diameter,embedded depth,anchor’s pretentioned force are discussed.With comparasion of calculated data and monitoring data, this paper generalized influence of pile diameter, embedded depth, anchor pretensioned force on permanent pars mechanics properties.