Socket type self-returning multi-section prefabricated pier and assembly method thereof

Abstract

The invention provides a socket type self-returning multi-section prefabricated pier and an assembly method thereof. The multi-section prefabricated pier comprises a bearing platform and the prefabricated bridge pier, wherein the prefabricated pier comprises a inserting bearing platform section, a plurality of pier body sections, a prestressed tendon, and energy dissipation ribs; the assembly method comprises the following steps that the prefabricated pier is prefabricated; a horizontal assembly method is adopted in a prefabricated factory, and the prestressed tendon is tensioned to enable allthe sections to be connected into a whole; and high-strength non-shrinkage cement slurry is injected into a pier grouting sleeve through grouting holes. On the site, the pier is lifted and is inserted into a pier installing hole, so that a certain gap is kept between the outer wall of the inserting bearing platform section and the inner wall of the pier installing hole; and after the prefabricated bridge pier is positioned, a guide pipe is inserted into the bottom of the gap, the high-strength non-shrinkage cement slurry is injected into the bottom through the guide pipe, and the slurry is discharged from bottom to top until the gap between the inserting bearing platform section and the pier installing hole is completely filled.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a socket-type self-resetting multi-segment prefabricated pier and an assembly method thereof. Background technique [0002] Compared with the integral cast-in-place bridge piers that are widely used at present, prefabricated bridge piers have great advantages in saving resources, protecting the environment, and shortening the construction period. Among the existing prefabricated bridge pier technologies, multi-segment prefabricated bridge piers have received more and more attention due to their excellent post-earthquake self-resetting performance. This kind of prefabricated bridge pier structure is to divide the entire bridge pier into several sections. Each section is firstly processed in the prefabrication factory, then transported to the site for assembly, and finally applied post-tensioning prestress to form a whole. [0003] For ordinary multi-segment prefabrica...

AI Technical Summary

Problems solved by technology

[0003] For ordinary multi-segment prefabricated piers, anchors and prestressed tendons need to be pre-buried in the foundation cap, and only aerial work can be used for segmental assembly, and it is necessary to ensure that the prestressed tendon pipes, energy-dissipating steel pipes, shears The force keys can be accurately aligned. These operations not only have high requirements for on-site construction accuracy, but also bring a lot of potential safety hazards, making the on-site construction equipment and technical management face huge challenges.

[0004] In addition, due to the connection form of dry joints between the segments, the prestressed tendons and energy-dissipating steel bars can directly contact the external environment, and the durability of multi-segment piers will be more serious than that of cast-in-place piers under long-term action reduce

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