Connection construction method of concrete caisson and steel caisson

Abstract

The invention relates to a connecting structure for a concrete open caisson and a steel open caisson and a construction method for the connecting structure. Circular holes for vertical steel bars of the concrete open caisson to penetrate are formed in horizontal ring rib plates at the top of the steel open caisson, the vertical steel bars of the concrete open caisson are inserted in the circular holes, and the lower ends of the vertical steel bars are supported on horizontal ring rib plates on the second layer. The vertical distance between the horizontal ring rib plates on the second layer and horizontal ring rib plates at the top should not be smaller than the sum of the anchoring length of the vertical steel bars and 2 times the width of the horizontal ring rib plates. The steel open caisson is filled with fill core concrete to the height required by the anchoring length of the vertical steel bars. A concrete top face is roughly chiseled after the fill core concrete is solidified. The concrete open caisson is poured, and connectors in the steel open caisson are poured together with the concrete open caisson during pouring, so that the concrete open caisson and the connectors of the steel open caisson are located in the steel open caisson. By means of the connecting structure for the concrete open caisson and the steel open caisson and the construction method for the connecting structure, the vertical steel bars of the concrete open caisson are firmly anchored in the fill core concrete of the steel open caisson, the requirement for stress of the connectors can be met, and integrity and durability are improved; the vertical steel bars of the concrete open caisson are accurately positioned, construction is convenient and fast, and the construction efficiency is high.

Description

technical field [0001] The invention relates to a connection construction method of a concrete caisson and a steel caisson. Background technique [0002] As one of the large deep-water foundations, the caisson foundation is widely used in bridges. Usually, in order to break through the soil and sink, the caisson foundation adopts the structural form filled with concrete inside the steel shell, and the upper part adopts a reinforced concrete structure. If the joint between the steel caisson and the concrete caisson is not handled properly, it may be cracked during the sinking of the caisson. In the later application process, the caisson structure is subjected to large bending moments and horizontal forces, and the joints on the tension side may Damaged by pulling or shearing. The previous treatment method was to arrange short stubble reinforcement bars at the joints. The stubble reinforcement bars were arranged in the steel caisson and between the horizontal ring ribs on the...

AI Technical Summary

Problems solved by technology

The previous treatment method is to arrange short stubble reinforcement bars at the joints. The stubble reinforcement bars are arranged in the steel caisson and between the horizontal ring ribs on the outer wall, far away from the outer surface of the caisson, and cannot fully play the role of the reinforcement bars. The steel bars start to function when they are cracked, and the positioning of short steel bars is difficult, time-consuming and labor-intensive during construction, and easily damaged when pouring concrete. In order to solve this problem, an innovative design of the joint between the steel caisson and the concrete caisson is required.

Images