Abstract: A modular protective sleeve for underground utilities may be pulled into an underground utility duct by using lanyards extending between two adjacent manholes through the utility duct. The modular protective sleeve may be assembled over an existing and active utility service such as electrical or telephone cables, optical cables, or gas lines, without disrupting the utility service. The protective sleeve comprises at least one bottom half-shell and two top half-shells which are interlocked on to another in such a way that they may be pulled in either direction. Once the protective sleeve is in place, the concrete casing surrounding the utility duct may be broken without danger to the utility service, after which repair or splicing to the utility can be carried out. The sleeve may then be retrieved for re-use, or left in place.

Abstract: A modular protective sleeve for underground utilities may be pulled into an underground utility duct by using lanyards extending between two adjacent manholes through the utility duct. The modular protective sleeve may be assembled over an existing and active utility service such as electrical or telephone cables, optical cables, or gas lines, without disrupting the utility service. The protective sleeve comprises at least one bottom half-shell and two top half-shells which are interlocked on to another in such a way that they may be pulled in either direction. Once the protective sleeve is in place, the concrete casing surrounding the utility duct may be broken without danger to the utility service, after which repair or splicing to the utility can be carried out. The sleeve may then be retrieved for re-use, or left in place.