Raft thickness must first be controlled according to punching. When the punching does not meet the requirements, the column pier is partially thickened under the column. Its size is generally beyond the punching critical plane. After preliminarily determining the pier size, the raft reinforcement is calculated in JCCad. Due to the stress concentration around the pier, the raft reinforcement around the pier may be large, so it needs to be adjusted again, or the pier is larger. Different designs can not be exactly the same, and the Angle of consideration will sometimes be different.
For example, a design feels that the reinforcement around the pier is too large, it is not good to construct, perhaps he will increase the pier, and some designs may feel that the local reinforcement is a little bigger, it may be that his pier just presses the punching control.