EXCAVATION WORK FOR WEAK GROUND

PURPOSE:To shorten the period of construction as well as reduce the cost of construction by a method in which outer form panels are driven, the ground is excavated, inner form panels for concrete are set to make up a foundation portion, reinforcing bars are set, and concrete is placed. CONSTITUTION:Outer form panels 2 are driven around the foundation portion 5 of the ground 1, and the ground inside the panels 2 is excavated. Inner form panels 7 for concreting are set in the inside of the panels 2, and reinforcing bars 8 assembled previously are set on the foundation portion 5 by hanging them by a crane. Concrete is then placed into the panels 7. Only the panels 2 are drawn out, formworks 11 for columns are set on the column portions 8b of the bars 8, and concrete is placed. The formwork 11 is then taken apart and embedding work is made. The amount of excavated soil to be carried can be reduced without the needs to excavate the ground excessively, and the degradation of the ground in the foundation portion can be prevented.