Steel truss girder chord member three-direction deformation monitoring and early warning device and installation method thereof

Abstract

The invention discloses a steel truss girder chord member three-direction deformation monitoring and early warning device and an installation method thereof. The steel truss girder chord member three-direction deformation monitoring and early warning device comprises a box-shaped shell. A transverse deformation monitoring mechanism, a vertical deformation monitoring mechanism and a longitudinal deformation monitoring mechanism are sequentially arranged in the box-shaped shell from left to right at intervals, each monitoring mechanism comprises a displacement amplifying unit and a signal transmitting unit, and even micro deformation of a steel truss chord member can be monitored through cooperation of the displacement amplifying units and the signal transmitting units. Corresponding deformation data are obtained through terminal equipment, and meanwhile, when the deformation exceeds a set threshold value, early warning is carried out; in addition, the device further comprises a displacement conduction mechanism and a leveling mechanism, and a plurality of devices can be arranged on the steel truss girder chord member to be detected in an end-to-end connection mode, and initial position adjustment is carried out. The deformation monitoring and early warning device is reasonable in structural design, high in monitoring precision, convenient to install and capable of monitoring and early warning the steel truss chord member in real time in an all-around mode, and it is guaranteed that a bridge runs safely all the time.

Description

technical field [0001] The invention belongs to the technical field of bridge monitoring, and particularly relates to a three-dimensional deformation monitoring and early warning device of a steel truss girder chord and an installation method thereof. Background technique [0002] Steel truss girder bridges have high bearing capacity and spanning properties, and have been widely used in highway and railway construction, such as Wuhan Yangtze River Bridge, Nanjing Yangtze River Bridge, Wuhu Yangtze River Bridge and Dashengguan Yangtze River Bridge. It is a milestone, their main girder structure adopts steel truss girder structure, which shows that steel truss girder has an important position in the field of bridge construction in my country. [0003] As we all know, the main structure of the steel truss bridge is composed of the main truss, the connection system, the deck system and the brake connection system. Among them, the main truss, as the main load-bearing structure of...

AI Technical Summary

Problems solved by technology

Among them, the geodetic method mainly uses the total station and the level to measure the angle and distance between the reference points, which has the advantages of high precision and flexible application. It is easily affected by weather conditions and other external factors, and it is easy to miss important signals. There are also problems such as heavy workload, long monitoring cycle, low sampling frequency, automatic measurement of monitoring points, and unification of monitoring time and point. And other problems, and the reliability of local deformation monitoring is poor; while GPS technology has the advantages of all-weather, high precision, high efficiency, etc., but the cost of use is high

That is to say, there is no device for monitoring and early warning of steel truss girder chord deformation in the prior art

Images