Steel strand back-tension prestressed channel mudjacking method

Abstract

The invention discloses a steel stranded wire inherent stress pore canal plaster pressing technique, which features that: steel stranded wire is placed into pore canal by cluster, anchor base set by both sides of the canal with plaster inlet port and outlet port on the base; seal the interspace between wire and anchor base with concrete and cut of extra part after the concrete coagulates, place plaster pump above the canal and pour plaster into canal from the lower inlet hole of the canal. The invention ensures every section in the canal will be full of plaster, full with density, and the steel stranded wire including wires at upper section of the canal will be protected by the plaster preventing the rust-eaten so to assure the connecting intensity of steel stranded wire and anchor meets design requirements. For those structure which still bearing force with anchor in later services, the invention canal plaster pouring will eliminates the incipient fault that intensity of anchor and ribs decreases or even the anchor separates.

Description

Technical field: [0001] The invention belongs to the technical field of building foundation implementation, and in particular relates to a grouting method for post-tensioned prestressed tunnels of steel strands. Background technique: [0002] Some modern suspension bridges use several unit cables as the main cable, and each unit cable that forms the main cable is composed of several steel wires. The two ends of the unit cables are pre-made anchors: inside the anchorage of the suspension bridge, then After setting, the bonded prestressed anchorage connecting cables are stretched, and the high-strength steel strands connected to the cables are connected. The unit cable that constitutes the main cable of the suspension bridge is connected by the anchorage at the end of the cable and the anchorage of the prestressed connecting cable in the anchorage of the suspension bridge to form the stress system of the main cable. Obviously, in this system, if the channel of the anchorage c...

AI Technical Summary

Problems solved by technology

Obviously, in this system, if the channel of the anchorage connection cable is grouted, the high end will be hollow due to the bleeding and shrinkage of the mortar, and the reinforcement will be corroded due to the lack of effective protection, and the strength will be reduced. In extreme cases , which may cause the anchorage of the anchorage connection cable to fall off

In this case, it is necessary to take effective measures to ensure that the hole grouting of the anchorage cable is 100% dense, and there will never be any gaps at the top of the anchorage connection cable hole due to cement slurry bleeding, shrinkage or other reasons, resulting in Hidden dangers in the future

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