Analysis of the influence of verticality control of the guide rail frame of the construction elevator and the connection accuracy of the standard section on the smooth operation

Construction elevators (commonly known as people-cargo elevators) are the main vertical means of transportation for transporting personnel and materials during construction. Their smooth operation is directly related to ride comfort and safety.The core factor that determines the smoothness of operation lies in the verticality control accuracy of the rail frame and the connection accuracy between the standard sections.The rail frame is the track on which the elevator runs, which is made of standard sections connected by high-strength bolts and attached to the building.During the installation process, the overall verticality deviation of the rail frame must be strictly controlled.According to the relevant specifications, the deviation of the installation verticality of the axis line of the rail frame to the horizontal datum of the base should not be greater than the corresponding ratio of the height of the rail frame (such as 1.5/1000).If the verticality is too poor, the cage will produce a lateral force during operation, resulting in additional friction and impact between the roller and the guide rail, causing severe shaking, which not only affects the ride experience, but also exacerbates the wear of the roller and the guide rail, and may even induce the risk of derailment.

The accuracy of the connection between the standard sections is also crucial.The manufacturing accuracy of each standard section (such as the flatness of the end face and the straightness of the main chord) determines its own geometric and dimensional stability.During installation, the end faces of adjacent standard joints must be tightly fitted, and the connecting bolts must be tightened according to the prescribed torque to ensure that a continuous and smooth track surface is formed between the joints.If there are steps or gaps at the connection, the rollers of the cage will have a vertical impact when they pass by, causing bumps.The loosening of the connecting bolts will cause the overall stiffness of the rail frame to decrease, exacerbating the shaking during operation.Therefore, during the installation process, it is necessary to be equipped with a high-precision theodolite or plumb meter to measure and adjust the verticality section by section, and to check the torque of each bolt and mark the anti-loosening.

Regular retest and adjustment during operation are the continuation of maintaining stability.With the settlement and deformation of the main structure of the building, the force adjustment of the attachment device, and the cumulative error of the rail frame itself, the verticality may change.The verticality of the rail frame should be re-tested regularly (for example, after each certain height is raised, or after strong winds and heavy rains), and fine-tuned as needed.At the same time, attention should be paid to the vibration of the cage operation during daily inspections. If there are abnormal bumps, the connection and verticality of the rail frame should be investigated in time.Only by taking the verticality and connection accuracy of the rail frame as the key quality control points, and strictly controlling the whole process from installation to use, can we provide a smooth and reliable operating track for the construction elevator to ensure the safe and efficient transportation of personnel and materials.