Assembled hollow pier based on end plate welding and its construction method

Abstract

The invention discloses an assembled hollow pier based on end plate welding and a construction method of the assembled hollow pier. The assembled hollow pier comprise pile foundations, cast-in-place bearing platform, prefabricated pier columns and prefabricated cap beams and is characterized in that the cast-in-place bearing platform is formed at the upper ends of the pile foundations in a cast-in-place manner and horizontally connected with the pile foundations; the prefabricated pile columns are vertically connected onto the cast-in-place bearing platform, each prefabricated pile column comprises an embedded pier column section partially embedded into the bearing platform and prefabricated pier column sections, and the prefabricated pier column sections are sequentially vertically weldedupwards to reach a set height and then connected with the lower end of the corresponding prefabricated cap beam. The assembled hollow pier has the advantages that the prefabricated pier column sections and the embedded pier column sections are prefabricated in a centralized manner, industrial production can be achieved, and construction quality can be increased; the embedded pier column sectionsare embedded by the aid of the cast-in-place bearing platform, pier column height differences in practical engineering are avoided by embedding depth change and modularizing prefabricated pier columnlengths, and modularized prefabricated pier column lengths are achieved.

Description

technical field [0001] The invention relates to the technical field of highway and bridge construction engineering, in particular to an assembled hollow pier based on end plate welding and a construction method thereof. Background technique [0002] Around the 1970s, European and American countries began to apply the technology of prefabricated segmental assembly piers for the construction of bridge substructures. In 1971, the Texas State of the United States pioneered the use of prefabricated segmental assembly piers to build the Corpus Christi City Overspan JFK Causeway Highway Bridge. In 1997, Mander J.B. and Cheng C.T. first studied the seismic performance of joint-segment assembled bridge piers connected by unbonded prestressed tendons through experiments. In 2002, Hewes and Priestley of the University of California, Berkeley conducted a cyclic loading quasi-static test study on four large-scale segmental assembly piers with glue joints. From 1999 to 2004, Billington ...

AI Technical Summary

Problems solved by technology

The main disadvantage of this scheme is that the construction period is long, and it is necessary to wait for the cast-in-place concrete to reach a certain age and the strength of the concrete to reach a certain level before the temporary support can be removed and the next step of construction can be continued

[0012] The prefabrication problem common to the above two connection methods is that the heights of the pier columns used on site are different, which leads to the need to prefabricate according to the actual pier height during prefabrication, which cannot be controlled according to the size of the formwork, and the prefabrication height control is more troublesome

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