Continuous beam No.0 block reinforced concrete-filled steel tube support erecting and dismantling method

Abstract

The invention provides a continuous beam No.0 block reinforced concrete-filled steel tube support erecting and dismantling method, and relates to the technical field of bridge construction. The continuous beam No.0 block reinforced concrete-filled steel tube support erecting and dismantling method comprises the following steps of S1, surveying and setting out, S2, leveling and brushing an isolation layer, S3, installing a steel tube, S4, pre-burying a U-shaped steel bar, S5, dismantling the steel tube, S6, installing a hoop, S7, melting sulfur mortar, and S8, sequentially dismantling all sections of formworks and plain concrete from top to bottom according to the method till the concrete-filled steel tube support is temporarily solidified. According to the erecting and dismantling method for the reinforced concrete-filled steel tube support of the No.0 block of the continuous beam, the method that the semicircular steel tubes are spliced in a multi-section mode and the sections are filled with the sulfur mortar is adopted, and the temporarily-solidified concrete-filled steel tube support can be easily, conveniently and rapidly installed and dismantled.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for erecting and removing a continuous beam No. 0 block reinforced concrete-filled steel tube support. Background technique [0002] Block 0 is generally called the first block of the Hanging Basket Bridge. On the pier body of the main pier, block 1, block 2, etc. can be constructed after the construction of block 0, which is divided into side spans and The middle span, when the side spans are finally closed and the middle span is closed, like a hanging basket bridge, if the left and right sides are divided, there are generally four piers, which means that there are 4 No. 0 blocks, 8 No. 1 blocks, etc., and the existing continuous The beam arch is designed as a single-box double-chamber structure, and 0# blocks must be poured on the top of the pier before the hanging blue can be installed. The 0# block needs to be erected to be poured. The shape of block 0#...

AI Technical Summary

Problems solved by technology

[0003] The existing No. 0 block has a wider cross-section and larger self-weight. In order to ensure the safety of the construction, the external temporary consolidated steel pipe concrete support of the No. 0 section is supported by a φ2m steel pipe, and plain concrete is poured in the pipe, directly from the top of the cap to the bottom of the beam of the No. 0 block. This method of erection and dismantling is very troublesome when installing and dismantling it because the No. 0 block has a wider cross-section and greater self-weight.