Circular steel tube joint concrete filling strengthening method: Fid-Bau Portal

Circular steel tube joint concrete filling strengthening method

ZHU LEI / SONG QIMING

The invention discloses a circular steel tube joint concrete filling strengthening method and belongs to the technical field of strengthening of in-service steel tube joints. A special columnar plastic bag and fine aggregate concrete for filling are included in the circular steel tube joint concrete filling strengthening method. A hole is formed in a non-stress concentration area of a main tube, and the plastic bag is plugged into the main tube and filled with gas so that the plastic bag can expand at the joint; then, the fine aggregate concrete mixed in advance is injected into a balloon, and the hole in the main tube is welded with a steel disc after the fine aggregate concrete is hardened to protect the concrete in the main tube against erosion, so that the effect of strengthening the tubular joints of the steel tube structure is achieved. The circular steel tube joint concrete filling strengthening method resolves the problem of strengthening joints by concrete injection in a practical project, has the remarkable strengthening effect, greatly improves the bearing capacity of joints, is convenient to implement, practical and easy and convenient to operate, reduces labor output, shortens the time limit for a project and decreases project expenses.

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