Cluster grouting corrugated pipe assembled pier connected with prefabricated bearing platform and construction method

Abstract

The invention provides a cluster grouting corrugated pipe assembled pier connected with a prefabricated bearing platform and a construction method. The assembled pier comprises a foundation, pier column sections and top cap sections. The foundation is formed by connecting foundation prefabricated sections through foundation connecting seams, connecting steel bars are pre-buried in the top surfacesof the foundation prefabricated sections and the prefabricated pier column sections, bundling connecting corrugated pipes are pre-buried in the bottom surfaces of the corresponding prefabricated piercolumn sections and the prefabricated top cap sections, the pre-buried connecting steel bars penetrate into the bundling connecting corrugated pipes, and then a high-strength grouting materials are poured; the top cap connecting sections and the top cap sections are connected through top cap splicing seams, and then the connecting steel plates are connected in a welded mode; and steel strands penetrate through the pre-buried corrugated pipes pre-buried in all the sections and are arranged in a U shape, the steel strands are tensioned at the top of the top cap, then foundation connecting joints are constructed, and then concrete is poured to complete splicing. The spliced pier connecting steel bars are arranged in a bundled mode, a construction tolerance is large, a construction precisionrequirement is low, splicing difficulty is small, grouting efficiency is high, the top cap sections are quickly spliced, prestress installation is convenient and fast, and cost is low.

Description

technical field [0001] The invention belongs to the field of bridge structure construction, and in particular relates to a cluster grouting bellows assembled pier connected with a prefabricated cap and a construction method thereof. Background technique [0002] The construction of prefabricated assembled bridge piers is a very important part of promoting the industrialization of bridge engineering. It has the advantages of small construction interference, fast construction speed, good project quality, and low labor cost. In recent years, it has been applied in many projects in the domestic municipal engineering and highway engineering fields. The frame pier is composed of pier columns and top caps. It is assembled from prefabricated pier columns and foundations, prefabricated top caps and prefabricated pier columns. It is often used to cross roads For work points such as overpasses, sleeve grouting connection or bellows connection is often used for joint connection. [000...

AI Technical Summary

Problems solved by technology

Sleeve grouting connection steel bars must be extended into the sleeve for a certain length to ensure the safety of the joint connection. To improve the safety of the joint, the length of the sleeve needs to be increased. At present, the cost of grouting sleeves is very high, and continuing to increase the cost will significantly increase the cost; sleeve grouting Or the bellows connection requires high construction accuracy, and the length and position of the steel bar joints are small; the steel bar joints need to be inserted into the sleeve or bellows one by one during construction, especially the steel bar joints between the top cap and the pier column. The construction alignment is difficult; after the steel bars are connected, grouting operations need to be carried out one by one, and there are many procedures; the cost of grouting sleeves is high, which is not conducive to large-scale application and promotion of projects

At the same time, when the frame pier adopts multiple small segments, there are multiple splicing joints, and the connection and installation between multiple small segments directly affect the assembly efficiency and quality of the overall structure; when the frame pier requires prestressed connections, steel strands are used Wire or thick rebar is often difficult to install

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