Prefabricated pier column and bearing platform connecting structure and construction method

Abstract

The invention discloses a prefabricated pier column and bearing platform connecting structure and a construction method. The structure comprises a stand column and a bearing platform, wherein the stand column comprises a section increasing section and a standard section, and the size of the cross section of the section increasing section is larger than that of the standard section; a plurality ofstand column steel bars and corrugated pipes are arranged on the circumference in the stand column and on the circumference in the section increasing section respectively, the corrugated pipes are located between the inner surface of the section increasing section and the stand column steel bars and close to the stand column steel bars, and threaded anchor heads are arranged at the bottom ends, which are close to the bearing platform, of the stand column steel bars; a grouting hole is formed in the lower part of the corrugated pipe, and an upper opening of the corrugated pipe is exposed in airas a grout outlet; inner-layer stirrups and outer-layer stirrups are arranged on the annular outer sides formed by the stand column steel bars and the corrugated pipes respectively; a plurality of pre-buried steel bars are arranged on the circumference in the bearing platform, and the pre-buried steel bars extend out of the bearing platform to be inserted into the corrugated pipes. According to the connecting structure, complex and high-precision prefabrication control requirements are not needed, construction operation is convenient, no special process and equipment requirements exist, and meanwhile, the static force and anti-seismic property of piers can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a connection structure and construction method of a prefabricated bridge pier column and cap. Background technique [0002] At present, the commonly used steel bar connection methods between prefabricated pier columns and caps mainly include: grouting sleeve connection method, grouting bellows anchor connection method and socket connection method. The grouting sleeve can be used to connect steel bars at the bottom of the prefabricated pier column, but the cost of the grouting sleeve is high, and the positioning accuracy of the sleeve and the pre-embedded steel bar of the cap are very high during prefabrication, and the sleeve is buried inside the pier column as a whole. Quality control is difficult and difficult to detect. The use of grouted bellows connection is actually an anchoring method for pier column reinforcement, so the bellows must be pre-embedded in the ca...

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Problems solved by technology

[0003] The object of the present invention is to solve the above-mentioned problems in the prior art, to provide a connection structure and construction method of prefabricated pier columns and caps, to improve the difficulties in construction positioning, high prefabrication precision requirements, inconvenient construction operations, and on-site adjustments in the prior art. Small redundancy, difficult to control grouting quality, large cast-in-place, weakened cap section, etc. At the same time, by improving the connection structure, the static and seismic performance is improved, the cost is reduced, and the construction is convenient

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