Construction of Large Volume Concrete for the Raft foundation of the Basement

Abstract

This paper analyzes the construction technology of large volume concrete for the raft foundation of the basement with engineering examples. In view of the difficulties in the construction of raft foundation, the design of concrete mix proportion, the temperature of the concrete into the mold, the concrete pouring and maintenance of concrete are discussed, which provides a theoretical basis for the construction of mass concrete. Keywords-Raft foundation; Mass concrete; Construction technology; Concrete crack I. ENGINEERING SURVEY This paper takes a building in the basement raft foundation engineering as an example, analysis and research the construction of large volume concrete of raft foundation for, the project for 20 layer on the upper part and underground part for layer 2, the project area foundation is strong weathering gravel argillaceous sandstone, artificial foundation takes raft foundation. The length of the raft foundation is 60 m, width of 20m, in the center of the bottom plate part, set a post pouring belt based along the short side direction, the average thickness of the floor is about 2m, bottom reinforcement using Ф22 @ 100 bar, use impermeability concrete, namely, S8, C40, total amount of more than 5000 cubic meters, belonging to the large volume concrete project.