Abstract: According to the complicated geology conditions of the foundation's main bearing stratum which partial contains weak intercalation, treatment methods are usually be used such as replacement method and composite foundation. Combined with practical work, some reinforcement designs are introduced and the applicability of the construction methods are discussed. In the base of the former research results, the new idea of reinforcement design through control settlement is been proposed. In view of the difficult problems that treated foundation is invisible and can not excavation to test directly, the multichannel transient surface wave method is be quoted firstly to test the reinforcement effects and the result is satisfied. It can be a useful reference for similar engineering practice.