Ground subsidence prevention die foundation and its construction method

摘要

PURPOSE:To enhance the construction efficiency and function by constructing the foundation on an upper layer board after a lower layer board, a plastic foam and the upper layer board are subsequently laminated and combined in a groove hole for the foundation and are arranged. CONSTITUTION:A lower layer board 2 and an upper layer board 5 of reinforced concrete mixed with high strength admixture and a plastic foam 4 having very low specific gravity such as polyurethane or polystyrene are manufactured at a factory. Then, after the excavation of a groove 1, the board 2, the rectangular foam 4 and the board 5 are laid on each other the inside of the groove and are fixed with bolts to form a foundation plate A. After that, forms and reinforcing bars are assembled on the foundation plate A, concrete is placed to construct the foundation B and, at the same time, it is surely fixed to the foundation plate A with bolts. In addition, if necessary, a vibration insulator C is laid under the foundation B. According to the constitution, the ground settlement prevention type foundation has higher compressive strength and lightweight in comparison with conventional ones, so that buoyancy can prevent a poor subsoil from settlement, construction can be easily carried out, and a construction period can be reduced.