Maintenance system and maintenance method for straight tower column of double-cable-plane cable-stayed bridge

Abstract

The invention discloses a maintenance system for a straight tower column of a double-cable-plane cable-stayed bridge. The maintenance system comprises a lifting point device, an anti-falling device body and a suspension operation platform. The lifting point device is fixed to a parapet wall at the top end of the straight tower column and comprises a fixed support, a movable support, a telescopic mechanism and a lifting rope; the lifting rope is hung at the end of the movable support, the movable support penetrates through the fixed support and the fixed support is fixed to the tower top parapet wall; and the length, stretching out of the tower column wall, of the movable support is adjusted through the telescopic mechanism. The anti-falling device is fixed at the top end of the straight tower column; and the suspension operation platform is connected with the tower top movable support through the lifting rope. The tower top external lifting point device of the maintenance system is small in size, has little influence on arrangement of tower top ancillary facilities, and is low in maintenance workload; when the movable support of the lifting point device is not used, the movable support can retract into the parapet wall at the tower top through the telescopic mechanism, and the influence on bridge landscape is small; the suspension operation platform can cover the whole sectionof the straight tower column; during maintenance operation, due to the small operation influence range, the influence on bridge deck driving is small.

Description

technical field [0001] The invention relates to the maintenance field of bridge engineering, in particular to a maintenance system and a maintenance method for straight tower columns of a double-cable cable-stayed bridge. Background technique [0002] Cable-stayed bridges have been widely used in the field of bridge engineering because of their beautiful shape, reasonable force, and large spanning capacity. As the main load-bearing components, the tower columns of cable-stayed bridges bear various bridge deck loads transmitted by cable-stayed cables. General Specifications" (JTG / T D60-2015) and "Detailed Rules for the Design of Highway Cable-Stayed Bridges" (JTG / T D65-01-2007) also clearly require that in the design of cable-stayed bridges, necessary maintenance facilities to meet maintenance requirements during operation. In the design of cable-stayed bridges in the past, due to lack of awareness of maintenance and inspection requirements, a considerable part of the cable...

AI Technical Summary

Problems solved by technology

In the design of cable-stayed bridges in the past, due to lack of awareness of maintenance and inspection requirements, a considerable part of the cable-stayed bridges did not install tower maintenance systems, and sometimes even had to use hot air balloons to climb the towers when maintenance was required; Bridges only set up maintenance platforms at several key maintenance parts of the tower columns, which cannot meet the maintenance requirements for full coverage of the tower columns; in recent years, some newly built cable-stayed bridges have installed a 360-degree rotatable Crane, the length of the crane arm is retractable, and a basket is hung at the end of the crane arm, and the tower column is inspected and repaired by lifting the basket

This kind of maintenance system has problems such as interference with auxiliary facilities such as lightning rods and aerial lights on the top of the tower, high maintenance costs in the open air, short service life and high cost.

Images