Cause analysis of construction accident in Putian wanda plaza

The construction accident in Putian wanda plaza was caused by the instability of the supporting system. According to the relevant data, when the foundation pit is excavated to the bottom of the pit, the steel support system is destroyed first, which leads to the sharp increase of the deformation of the maintenance wall, and the first reinforced concrete support breaks at the joint of the support and purlin, which eventually leads to the failure and collapse of the whole support system. The direct cause of the accident is the instability of the second supporting system, which leads to the sharp increase of the deformation of the retaining pile and the failure of the whole supporting system.