Large-tonnage steel truss arch segment non-moving lifting method based on cable hoisting system accurate calculation

Abstract

The invention discloses a large-tonnage steel truss arch segment non-moving lifting method based on cable hoisting system accurate calculation. A segmental catenary numerical iteration method and a tower top cable force continuation method are adopted for conducting cable hoisting system construction stage accurate calculation; by means of the method, steel truss components of different positions and different weights are lifted and installed successfully, the dosage of cable hoisting system suspension clasp tower system materials is less, selection of the size of a cable main load-bearing rope is reasonable, the construction cost is greatly reduced, the construction efficiency is improved, wide-range traction after load lifting is reduced through component non-moving lifting, the construction safety risk is lowered to the maximum extent, the problems that for a traditional lifting technology, cable system and suspension clasp tower system arrangement is conducted according to the maximum lifting weight, a larger number of materials are used, and the control difficulty is high are solved, and the method is a lifting method which is closer to practice, scientific and reasonable.

Description

technical field [0001] The invention relates to a hoisting method, in particular to a fixed-point hoisting method for large-tonnage steel truss arch segments based on accurate calculation of a cable hoisting system. Background technique [0002] Types of common hoisting methods: [0003] (1) The symmetrical hoisting method is suitable for workshops and other occasions where self-propelled cranes are difficult to hoist. (2) The sliding hoisting method is mainly aimed at towering equipment or structures with a high height. (3) The basic principle of the rotary hoisting method is to connect the bottom of the equipment or component to its foundation with a rotary hinge, and use a crane to rotate the equipment or component around the hinge to achieve an upright position. (4) The hoisting method of super-high-altitude inclined cable-supported lifting equipment is suitable for hoisting medium and small equipment at super-high altitudes, and uphill cableways in mountainous areas. ...

AI Technical Summary

Problems solved by technology

[0004] The existing member cable hoisting system is designed according to the maximum hoisting weight, but after accurate calculation of the cable hoisting system using two methods, it can be concluded that hoisting each different hoisting position and different weight components is the force of the cable system, because it may The force of the cable system is not controlled by the heaviest component (the stress position of the cable system is different, and the maximum weight that can be hoisted is also different). The conventional cable hoisting system does not propose the concept of "fixed-point lifting" and requires components The posture is the same as the design posture before hoisting; therefore, it needs to be improved

Images