Basin-type support replacement construction method for reserving all anchor bolts

Abstract

The invention discloses a basin-type support replacement construction method for reserving all anchor bolts. The method comprises the steps that an old basin-type support is processed; a beam body adopts a synchronous jacking-up system, and the jacking-up height is larger than the thickness of a lower steel plate; the old basin-type support is taken out; the anchor bolts are processed; a novel basin-type support is processed, the structure of the novel basin-type support is the same as that of the old basin-type support obtained before processing, and the novel basin-type support is processedbefore installation; the novel basin-type support is installed; a jack is jacked up synchronously for oil return pressure relief, and replacement of the basin-type support is completed. By means of the construction method, all the anchor bolts of the original basin-type support are reserved, and it is guaranteed that connection of the novel basin-type support and the beam body and padstone is reliable.

Description

technical field [0001] The invention relates to a replacement construction method for a basin-type support, in particular to a replacement construction method for a basin-type support with all anchor bolts retained. Background technique [0002] At present, most of the basin support replacement techniques in the prior art use to cut off all the anchor bolts, take out the old support as a whole, place the new support on the original support as a whole, and use the pre-embedded leveling steel plate at the bottom of the beam for the upper steel plate. Welding, the lower steel basin is filled with epoxy mortar, or the steel plate is embedded in the bottom of the bridge without beams, and the upper and lower steel plates of the basin support are filled with epoxy mortar to ensure the connection between the basin support and the bottom of the beam and the pad stone. [0003] This construction technique has following disadvantages: [0004] (1) During the welding process of the st...

AI Technical Summary

Problems solved by technology

[0004] (1) During the welding process of the steel plate on the new pot support and the pre-embedded leveling steel plate at the bottom of the beam, too high temperature will easily damage the function of the PTFE plate of the new pot support and cause a decrease in the strength of the beam concrete;

[0005] (2) After the steel plate on the new pot support is welded to the pre-embedded leveling steel plate at the bottom of the beam, the new pot support will not be replaceable;

[0006] (3) If the upper and lower steel plates of the pot support are connected with the bottom of the beam and the pad stone by filling epoxy resin, it is easy to cause the new pot support to be biased due to poor operation, and the disease will appear again;

[0007] (4) The basin-type support is set at the continuous beam with a large span. The continuous beam is affected by the temperature, which will produce a large temperature vertical and horizontal expansion. Once the basin-type support cannot meet the vertical and horizontal expansion of the continuous beam, it will The connection between the pot bearing, the beam body and the pad stone produces a large horizontal force, and the tensile strength of epoxy resin is not high, which will easily lead to the detachment and damage of the connection between the pot bearing, the beam body and the pad stone, and eventually lead to Pot support failure