Bridge splicing seam vehicle-induced vibration deformation monitoring and control system and method

Abstract

The invention belongs to the technical field of bridge splicing and widening, and particularly relates to a bridge splicing seam vehicle-induced vibration deformation monitoring and control system and method. An internal force transmission channel is established between the new bridge and the old bridge through the steel trusses and the I-shaped steel, during splicing seam pouring construction, the vehicle load on the old bridge can be effectively transmitted to the new bridge structure, the deflection difference between the new bridge and the old bridge is reduced, and the splicing seam pouring quality is improved. The method comprises the following steps: monitoring deflection difference between the new bridge and the old bridge and vibration information caused by an operation load on the old bridge in a splicing seam construction process through a laser deflection instrument and a vibration pickup so as to determine the solidification quality of concrete; monitoring the deflection difference and vibration information so that the deformation difference of the two sides of the splicing seam and the axle coupling vibration environment can be known in real time without interrupting the traffic construction process, and determining the pouring construction quality of the splicing seam through the deflection difference and vibration information on the old bridge; and meanwhile, when the concrete is monitored to be damaged in the solidification process, repairing the concrete in time.

Description

technical field [0001] The invention relates to the technical field of bridge width splicing in highway reconstruction and expansion projects, in particular to a system and method for monitoring and controlling vibration and deformation caused by vehicle-induced vibration of bridge splicing seams. Background technique [0002] At present, expressways can no longer meet the growing traffic volume, and it is imperative to widen the existing expressways. In the existing expressway widening project, when the bridge is widened, the pouring of the widening joints of the old and new bridges is very important; the force transmission mechanism of the joints is to transfer the internal force generated by the operating load of the old bridge to the bridge through the reinforced concrete structure. The new bridge enables the two to work together. However, during the pouring construction process of the splicing joints, the strength of the concrete has not been formed, and the strength a...

AI Technical Summary

Problems solved by technology

However, during the pouring construction process of the splicing joints, the strength of the concrete has not been formed, and the strength and stiffness of the splicing joints are both small, which will lead to unbalanced loads on the new bridge and the old bridge, resulting in large gaps between the old and new bridges. The deflection is poor, so that the concrete material will be severely damaged during the solidification and forming process.

As a result, the quality of the seams cannot meet the operating requirements of the expressway

[0003] In the prior art, when pouring the joints, in order to reduce the deflection difference between the new bridge and the old bridge caused by the traffic load on the old bridge so as to ensure the pouring quality of the joints, it is often necessary to control the traffic on the old bridge; When the traffic control plan of the old bridge is used to interrupt the traffic, it will cause a certain degree of economic loss. When the speed limit plan is used to control the traffic of the old bridge, some vehicles will overspeed at will, which will affect the quality of splicing joints , so that the pouring quality of the joints cannot be guaranteed; after that, the construction party will pour the joints according to the experience of the construction personnel; the quality of the pouring in the process of pouring the joints is only judged based on the construction experience of the construction personnel ( For example, during the concrete solidification process, the naked eye observes the concrete solidification state, visually observes the concrete solidification process, and other simple means to evaluate the quality of the splicing joint pouring), and cannot timely and accurately judge the quality of the splicing joint pouring construction; at the same time, in the face of the concrete solidification process The defects in the system cannot be dealt with in a timely and accurate manner.

However, the experience of the construction personnel of the construction party is often uneven. At the same time, only through the construction experience to complete the pouring of the splicing joints, the construction quality is faced with great uncertainty, and the efficiency and quality of the construction cannot be guaranteed.

Images