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FASTCAST UNDERGROUND FROM BUCHAN CONCRETE SOLUTIONS HAS BEEN DEVELOPED TO OFFER A COMPREHENSIVE RANGE OF SUPPORTING MATERIALS FOR USE IN BELOW-SURFACE CONSTRUCTION PROCESSES.

FASTCAST Underground aims to provide customers with a safe, precast product that can be easily installed, with minimum finishing required, when working in an underground environment.

Buchan offers a bespoke service for specific tunnel and shaft projects, based on 40 years experience in supplying the tunnelling industry worldwide as well as providing proprietary standard products. The following products are available:

BUCLINE SHAFT LININGS
A smooth segmental shaft joined together by hidden mechanical fixings, Buchan’s patented system retains all the flexibility and speed of erection associated with a bolted ring, whilst also providing a smooth finished shaft. These are also available with EPDM gaskets, which are factory fitted.

A complete range of cutting edges, corbel rings, platform support rings and bespoke cover and landing slabs are available to assist in the construction process for all types of shaft rings.

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Download Underpinning procedure fitting instructions (586kb)

Download Caisson procedure fitting instructions (444kb)

BUCLINE CAISSON SHAFT LININGS
A Buchline Caisson shaft is a smooth segmental shaft joined together by external fixings. The strong connections bolt together segment to segment and ring to ring, complete with gaskets, to form a finished shaft lining.

Our system retains all the benefits of strength, flexibility and speed of erection associated with a bolted ring, whilst providing the client with a safer system of working, by reducing man-entry into the shaft and working height.

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Download Caisson rings installation instructions (147kb)

Download two piece caisson rings installation instructions (124kb)

CAISSON SHAFT UNITS
A range of standard one piece/non-segmental units is available for the fast and simple construction of small diameter shafts. The units bolt together vertically to form a finished lining - bespoke designs are available upon request.

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Download one piece caisson unit fitting instructions (115kb)

SHAFT COVER AND LANDING SLABS
Buchan produce a range of sectional cover slabs and internal landings.

Special designs also available to accommodate crane capacity constraints.

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Download cover slabs instructions (350kb)

BUCLOCK TUNNEL LININGS
A buclock tunnel is a completely smooth segmental tunnel lining joined together by hidden mechanical fixings. This range of linings has been developed to provide accurate construction with conventional tunnelling shields. The system provides a lining that is strong, flexible and fast to build.

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Download Building Buclock tunnel linings with Buclock fixings instructions (471kb)

TRAPEZOIDAL SEGMENTAL
TUNNEL LININGS
Developed in conjunction with leading consultants and contractors, these single pass smoothbore linings have been designed for use with the latest closed-face tunnelling machines.

The linings can be designed to accommodate elastomeric compression gaskets or hydrophilic seals. Individual segments are wedge shaped thus eliminating the need for a special closure segment.

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BUCLOCK
Combining the advantages of a solid dowel and a secure threaded connection, this patented self-locking plastic connector provides an ideal circle joint fixing for tunnel linings. Suitable for use with packings, hydrophilic seals and EPDM compression gaskets, it is totally non ferrous, fast and easy to build and has no pockets or recesses to fill, leading to significant savings in construction time and cost.

A simple and easy to use connection, the buclock is highly durable, self-locking and self-aligning. Only a minimum amount of building clearance is necessary and it is fully compatible with most types of tunnelling machines.

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STANDARD BOLTED LININGS
Buchan produces a standard range of high quality concrete bolted segments for all types of tunnels. They may also be used for the construction of shafts and manholes, whilst a bespoke design is also offered to accommodate special requirements.

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Download Underpinning procedure fitting instructions (410kb)

Download Caisson procedure instructions (277kb)

JACKING PIPES
Buchan offers a choice of larger diameter standard jacking pipes and Interjack Stations to suit the latest generation of pipe jacking systems, each incorporating the robust butt joint with integral steel band. This joint design ensures the jacking forces are transmitted over the maximum area of the pipe, therefore reducing the possibility of damage due to jacking loads.

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PLASTIC COMPONENTS FOR UNDERGROUND WORKS

Buchan produces an ideal connection system between segmental tunnel linings and an extensively proven grout/lifting system.

Download Buclock Circle Tunnel Lining Connections (60kb)
Download Grout/Lifting System (77kb)

SITE USE OF LIFTING FINGERS

Buchan provide a specifically designed lifting system for handling segmental tunnel linings.

Download leaflet (169kb)