In the pouring, each construction c

In the pouring, each construction column should be cast in the order of outward and inward symmetry, not from one direction, to prevent the formwork from being pushed gradually inclined, resulting in accumulation of errors, avoid the bottom of less vibration leakage vibration, and the four corners of the vibration, resulting in edges and corners of concrete segregation, after the removal of the mold affect the appearance of concrete column quality.