Construction method for rapidly replacing arch bridge tie bars in situ

Abstract

The invention discloses a construction method for rapidly replacing arch bridge tie bars in situ. By means of the method, when the service life of existing arch tie bars in service is ended, the original arch bridge tie bars are rapidly replaced; in the replacement process, temporary tie bars are pulled on the two sides symmetrically and simultaneously, the two sides are replaced equivalently, and cables are symmetrically and gradually broken. The arch bridge tie bars are safely replaced, the original stress state is achieved, safety stock of the bridge tie bars is increased, and secondary replacement can be carried out; the service life of a bridge is prolonged, the engineering construction cost is saved, and the total economic benefits and social benefits are good.

Description

technical field [0001] The invention relates to bridges, in particular to a method for clearing holes of tie rods of bridges and quickly replacing the tie rods. Background technique [0002] Tied arch bridge is a young member of the ancient family of arch bridges. It was born in the late 19th century. Tied arch bridge is a composite system composed of beams and arches. It is widely used in bridge engineering because of its beautiful shape. The tie rod is the lifeline of the tie rod arch bridge. The huge horizontal force at both ends of the arch foot is offset by the tie rod. Therefore, the reliability of the tie rod plays a decisive role in the overall safety of the arch bridge. With the passage of time, the tie rod arch bridge built in the 1990s was very simple because of the simple anti-corrosion method of the tie rods, and the corrosion of the tie rods was more common. Long-term operation will also cause stress relaxation of tie rods, and fatigue will also occur due to t...

AI Technical Summary

Problems solved by technology

The newly added tie rod scheme cannot solve the deterioration problem of the original tie rod. The newly replaced tie rod deviates from the axis of the original arch rib, and there is also a certain eccentricity. At the same time, due to the structural constraints of the arch foot, the newly added structural facilities will also affect the The force of the arch foot, so the new tie bar scheme has great limitations, and because the new tie bar protrudes from the bridge deck, it seriously affects the appearance

In addition, some newly added tie rods still cannot be replaced, resulting in potential safety hazards; in terms of construction, it is also difficult to ensure that the force of the entire bridge structure remains balanced during the replacement of the tie rods, which brings great difficulties to the construction operation

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