TECHNIQUE OF REPLACING SUPPORT PARTS OF BRIDGE Russian patent published in 2008 - IPC E01D22/00 

FIELD: construction, road construction.

SUBSTANCE: invention pertains to the field of reconstruction of bridges with a concrete slab span continuous structure. The technical outcome is the increase in effectiveness of replacing supports of a continuous superstructure of a bridge due to the accuracy of installing it into the projected position and increased reliability due to lowering of the resultant stress in the superstructure during replacement of the supports. The technique of replacing the supports of the continuous superstructure of the bridge, implemented successively on each support of one superstructure and including construction of a device for temporary support of the superstructure in the form of a concrete pier with a dividing polymer layer for setting of the concrete of the pier with concrete support, and mounting on the pier, a sliding device in the form of a beaming metallic sheet with antifriction material on it. On the surface of the supports on the spots for mounting jacks and temporary support devices, concrete is removed down to the protective layer of the reinforcement. The jacks are mounted on a metallic sheet. The gap between the upper sheets, mounted on the jacks and the superstructure is filled with a plastic material. The jacks are joined to the battery for connection to different pumping stations. Lifting of the superstructure is done for a value not more than 10 to 15 mm, after which it is remounted on the device for temporal support. By removing the jacks, the old supports are removed. The superstructure is then raised on the jacks again and extra metallic sheets are cleared. The superstructure is lowered into the projected position. After mounting the new supports and strength gain of the plastic material in the gaps, the superstructure is raised, and the device for temporal support is dismantled.

EFFECT: increased effectiveness of replacing supports of a continuous superstructure of a bridge.

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