A Precise Control Method for the Supporting Force of the Rubber Bearing Pad Stone of an Assembled Slab Bridge

Abstract

The invention provides a bearing force accurate control method of a fabricated type slab bridge rubber bearing pinner. According to the bearing force accurate control method, a hydraulic pinner, a rubber bearing and a bride slab are sequentially fixed above a cover beam, a hydraulic cylinder is arranged in the hydraulic pinner, the rubber bearing and the bridge slab arranged above the cover beam are supported according to hydraulic oil in the hydraulic cylinder, the bearing force of the pinner can be accurately controlled by utilizing the amount of the hydraulic oil, the bearing force in any magnitude can be provided if the bearing force in any magnitude is needed, the purpose that the rubber bearing pinner bearing force is accurately controlled is achieved, the quality of a bridge is finally improved, and the service life of the bridge is prolonged.

Description

technical field [0001] The invention relates to the technical field of construction and maintenance of highway bridges, in particular to a method for precisely controlling the bearing force of a cushion stone of an assembled slab bridge rubber bearing. Background technique [0002] Bridges are an important part of highways. With the rapid development of highway construction, the number of bridges is also increasing rapidly. According to incomplete statistics, there are currently more than 800,000 highway bridges in my country, and more than 10,000 bridges are built every year. my country is not only a "big bridge country", but also a "bridge powerhouse". [0003] Prefabricated slab bridge is a common bridge type with large quantity and wide area in highway bridges. It has a simple structure and clear stress. It can be made of reinforced concrete or prestressed concrete. It can be made solid or hollow, and it can be produced in a factory. Therefore, it is widely used in vario...

AI Technical Summary

Problems solved by technology

The most widely used pad stone at present is reinforced concrete pad stone (referred to as concrete pad stone). The adjustment of the supporting force is realized by adding and subtracting steel plates between the rubber bearing and the concrete pad stone. The adjustment of the supporting force in this way is Graded, and the size of the supporting force of the concrete pad stone cannot be measured and displayed intuitively, and the purpose of precise control cannot be achieved, which will lead to the problem of uneven force on the rubber bearing and the problem of voiding; another kind of pad stone is an adjustable metal device Cushion stone (referred to as wedge-shaped cushion stone), it adjusts the height of the cushion stone through the sliding of the upper and lower wedge-shaped sliders inside the metal device. It is still based on experience, and the size of the wedge-shaped cushion stone’s supporting force cannot be measured and intuitive display, also can not achieve the purpose of precise control

Without precise control of the supporting force of the rubber bearing cushion stone, the size is uneven, and the problem that is likely to occur is: under the load, the deformation of the adjacent rubber bearings of the adjacent bridge decks is quite different, which will lead to A large shear force is generated between the adjacent bridge slabs, causing premature failure of the bridge deck pavement after 3 to 5 years of service, and even forming a single slab under stress, which not only affects the service quality and traffic capacity of the bridge, but also poses safety hazards, and even causes security incident