Partial unbonded grouting corrugated pipe prefabricating, assembling and connecting structure and construction method

Abstract

The invention relates to a partial unbonded grouting corrugated pipe prefabricating, assembling and connecting structure and a construction method, the partial unbonded grouting corrugated pipe prefabricating, assembling and connecting structure comprises a main rib, a metal corrugated pipe and a sleeve, wherein the end parts of the main rib need to be anchored in the bearing platform or the bentcap; the metal corrugated pipe is pre-buried in the bearing platform or the bent cap, and the metal corrugated pipe is filled with dense filler in a pressed mode to achieve anchoring connection with the main reinforcements. Main ribs of a certain length, close to the joint side, in the metal corrugated pipe are coated with anti-corrosion lubricating grease, the metal corrugated pipe is sleeved with sleeves of the corresponding length, the two ends of each sleeve are subjected to water sealing treatment through flexible sealant, spring clamps are adopted for fixing before bridge pier pouring, and therefore main rib non-bonding sections are formed on the main ribs. Compared with the prior art, stress concentration at the joint can be relieved, the yield length of the main ribs around the joint is increased, the ductility and the energy dissipation capacity of the prefabricated assembled pier are improved, meanwhile, the strain rate of the main ribs at the joint is reduced, and the fatigue performance is improved; the whole connecting structure is simple in construction, easy to operate, high in economical efficiency and convenient to apply and popularize.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a prefabricated and assembled connection structure and a construction method of a partly unbonded grouting corrugated pipe. Background technique [0002] For prefabricated bridges, the performance of the connections between prefabricated components is one of the most direct and critical factors affecting the static and dynamic response of bridge structures. The traditional grouted metal bellows connection structure has been favored by scholars at home and abroad because of its fast construction, good performance and low cost, and has been adopted by many construction units because of its high tolerance. [0003] However, based on the pseudo-static test and shaking table test of the traditional grouted metal bellows connection structure, the results show that the plastic hinge length of the prefabricated assembled bridge pier connected by the traditional grouted metal b...

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Problems solved by technology

[0003] However, based on the pseudo-static test and shaking table test of the traditional grouted metal bellows connection structure, the results show that the plastic hinge length of the prefabricated assembled bridge pier connected by the traditional grouted metal bellows is smaller than that of the cast-in-place bridge pier, and the deformation is mainly concentrated in the joints. The ductility and energy dissipation capacity of prefabricated piers connected by grouted metal bellows are often lower than those of cast-in-place piers, and they are not suitable for bridge piers in moderate and high-intensity earthquake areas.

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