Introduction

Metal corrugated pipe sleeves are typically made from low-carbon steel or stainless steel through cold rolling, welding, or spiral winding processes. The main body is a tubular structure with continuous circular corrugations. The connection principle is as follows: Insert the two steel bars to be connected into the two ends of the sleeve, and fill the gap between the sleeve and the steel bars with high-strength non-shrinkage grouting material. The bonding force of the grouting material, the mechanical interlocking force between the corrugations in the corrugated pipe and the grouting material, as well as the adhesion between the grouting material and the surface of the steel bars, form an overall force-bearing connection node. Compared with ordinary straight-wall grouting sleeves, the corrugated structure of the metal corrugated pipe can significantly increase the contact area between the grouting material and the sleeve and the mechanical anchoring effect. Moreover, the flexibility of the corrugated pipe can adapt to minor deviations during steel bar installation to a certain extent, resulting in a higher construction tolerance rate.

Purpose

Metal corrugated pipe sleeves are mainly used for the longitudinal or transverse reinforcement connection of prefabricated components (such as prefabricated columns, beams, wall panels, etc.) in assembled concrete structures. They are particularly suitable for the following scenarios:

1. The reinforcement connection at the joint of prefabricated components (in cases where the reinforcement cannot be rotated);

2. Structural nodes that need to withstand combined tension, compression, and shear forces (such as high-rise buildings, bridge piers, subway segments, etc.);

3. Engineering projects with high requirements for the seismic performance and fatigue performance of connection nodes (such as buildings in seismic-prone areas, bridge projects).