In addition, the foundation ponding is easy to cause the bearing capacity of the foundation to decline or uneven settlement, resulting in the verticality deviation of the elevator or additional external forces on the underframe and other structures.
02 there should be drainage facilities around the foundation in violation of article 4.1.2 of the safety code for construction lifts (gb10055-2007).
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03 the analysis shows that the underframe of the construction elevator is soaked in the water for a long time, which is easy to cause the corrosion of the steel of the underframe, resulting in the thinning of the wall thickness and the reduction of the strength; The underframe weld is rusted, which is prone to open welding; The anchor bolts connecting the underframe and the foundation are rusted, resulting in the weakening of the tensile strength of the bolts and the failure of the connection.
01 hidden danger indicates that the foundation is not provided with measures to prevent ponding or drainage, and the foundation and underframe of the construction elevator are soaked by ponding.
