Segmental assembly type pier with cascade performance and construction method thereof

Abstract

The invention relates to a segmental assembly type pier with cascade performance and a construction method thereof. Comprising a cover beam, an RC section with a mortise and tenon joint structure, a UHPC section, a replaceable RC section ring, a bearing platform, an unbonded prestressed tendon for applying prestress, a common energy-consuming reinforcing steel bar, a high-strength energy-consuming reinforcing steel bar and a steel hoop. The UHPC section is inserted into the bearing platform, and a replaceable RC section ring is arranged on the periphery of the UHPC section; the upper ends of the UHPC sections are inserted into lower end grooves of the RC sections with the mortise and tenon structures, and the multiple RC sections with the mortise and tenon structures are connected up and down in a tenon and mortise connection mode; the common energy-consuming reinforcing steel bars and the replaceable RC section rings are cast into a whole in situ, and the end parts of the common energy-consuming reinforcing steel bars are respectively connected with the bearing platform and the end parts of the RC section energy-consuming reinforcing steel bars through mechanical threaded sleeves; the high-strength energy-dissipation steel bars penetrate through the UHPC section from the interior of the bearing platform to the middle of the upper RC section and then are grouted. The device has the advantages of stair deformation, graded energy consumption, controllable damage, replaceability of damaged components after an earthquake and the like, and can be suitable for bridge engineering with different fortification standards.

Description

technical field [0001] The invention belongs to the technical field of prefabricated bridges, and in particular relates to a segmental prefabricated pier with step performance and a construction method thereof. Background technique [0002] In recent years, as the concept of energy saving, emission reduction and sustainable development has been continuously proposed, the previous bridge construction technology—traditional cast-in-place technology has the characteristics of long construction period and great impact on the surrounding environment and traffic, which is not in line with the concept advocated by our country. , and the prefabricated assembly bridge construction method can avoid the problems existing in the traditional cast-in-place construction method, therefore, the prefabricated assembly technology has attracted widespread attention. Prefabricated assembly technology is mainly used in the superstructure of bridges, but less in the substructure. Segmentally asse...

AI Technical Summary

Problems solved by technology

Energy-dissipating devices are generally divided into external energy-dissipating devices and built-in energy-dissipating devices. External energy-dissipating devices usually use external energy-dissipating angle steel, buckling restraint supports, external dampers, etc.; Memory alloy (SMA), aluminum rods, fiber reinforced bars (FRP), high-performance steel bars, etc.; the problems of the above-mentioned energy-consuming devices include: the corrosion resistance of the energy-consuming devices, the device is not easy to replace after damage, and if it is replaced, it will cause Material waste and other issues; segmental assembly piers can also improve the seismic performance by applying new materials (such as ECC, UHPC, etc.), but if the entire bridge pier uses new materials, although the seismic performance can be improved, it is accompanied by construction costs. It is high and will cause waste of materials, and it is not convenient for a large number of practical engineering applications.

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