Chevloc
Chevloc is a highly versatile split faced precast concrete modular system which permits retaining and free-standing walls to be built in a variety of orientations and alignments. It can follow both concave and convex curves without the need for special blocks or cutting. Irregular changes of direction can be accommodated by mitring the units using a concrete saw to suit the required angle. The Chevloc system consists of only two hydraulically pressed units, a base and a standard building block.
Kriblok
Concrete crib or Kriblok gravity earth retaining wall by RPC Contracts is a modular retaining wall which can retain earth or soils to heights of up to 10 metres.
Comprising reinforced precast concrete components specially designed to interlock with each other, the Kriblok gravity wall retaining system enables the rapid construction of stable, attractive earth retention schemes without the need for mortar or special fixings.
The Kriblok system is available in a range of component sizes to ensure cost-effective solutions for a wide variety of situations. Each range consists of only two basic components, a header unit and a stretcher unit, with header units available in a choice of lengths. This, together with the fact that the Kriblok system can be erected to form concave or convex radii as well as internal or external corners using standard components, simplifies both design and specification procedures.
On site, Kriblok units are simply assembled to create a series of interlocking cribs which are then filled with granular free draining material to provide a high performance gravity wall structure.
Simple in concept yet extremely effective in application, Kriblok offers the strength and versatility to cope with virtually all earth retention problems.
Rocwall
Rocwall comprises precast interlocking reinforced concrete panels faced with natural stone.
Rocwall facilitates the rapid construction of retaining and free – standing walls in a fraction of the time required for traditional methods of wall construction with consequential savings in costs.
The ability to choose the size, type and finish of natural stone facing provides exceptional freedom in design of the finished appearance, enabling a distinctive finish to be created for every project, as well as allowing the Specifier to meet local planning requirements and to select a finish which will blend in with the local environment.
Hand setting of the stone facing during manufacture provides an attractive random appearance adding to the aesthetic appeal of every installation. The availability of parapet units, planters and other complimentary products ensures that Rocwall can be applied to a wide range of situations.
Porcupine
Porcupine is a revolutionary and versatile concrete block retaining wall system. It needs no mortar and requires the minimum of plant and machinery for installation.
The individual Porcupine element is an interlocking curved concrete block, which achieves its stability by the spines on the top surface of one block matching those on the bottom of another. No mortar is needed.
Porcupine is a versatile and economic solution for effective and visually appealing retaining walls.
01 Kriblok - M6/M42 Widening
Client: Highways
Main Contractor: Costain
Consultant: Halcrow
Contract Value: £255,000.00
Details: The client required a retaining wall system that would not only meet the stringent design, quality and life expectancy demanded for highways, it also had to be speedy to install, flexible in design and construction to enable alternations to be made rapidly to meet the changes in ground conditions that would be encountered without disruption to the
supply chain and installation.
RPC’s Kriblok was specified because of its ability to meet all criteria because:
1. Design can be constantly updated to suit variable ground conditions
2. All components are manufactured by RPC and are held in stock
3. RPC’s team of qualified and experienced installers
To download the full details – click here.
02 Kriblok - Blackwood Retail Park
Client: Retail Park
Contractors: Walters UK Ltd
Supervision: HBG
Product: Kriblok
Quantity: 3000m²
Construction Period: 12 Weeks
Details:The development of a new super-size DIY retail store required an extensive cut and fill exercise. This resulted in the need for an earth retaining structure which was capable of retaining heights of up to 10 metre, was quick to build, required no special ground preparation and could allow a variety of as-dug material to be re-used without expensive and difficult earthworks treatments.
RPC Contracts Kriblok senior system was chosen as it met all the site requirements while also satisfying the client’s need for an extensive design life (125 years) and a cost-effective solution. RPC ‘s in-house team designed the structure and its foundations and the installation was carried out and completed in 12 weeks by RPC, including the construction of foundations and all the required backfilling.
Special requirements/details:
Much of the work was carried out in small lengths, to underpin the earth embankments and to minimise the risk of slippage and reduce the quantity of temporary sheet piling (installed by others).
To download the full details – click here.
03 Rocwall - Conwy Quay
Client: Conwy County Council
Contractor: Mowlem Civil Engineering
Product: Rocwall
Quantity: 600m²
Details: Conwy council wanted to extend the existing harbour facilities and improve the scour protection to the abutments of the road bridge by increasing the length of the quay wall. In order to overcome the very poor ground conditions and satisfy the need to work in tidal conditions, they elected to use a driven sheet pile, which they would then clad. RPC Contracts designed a pre-cast concrete panel, faced with natural pitch-faced and dressed limestone. The panels were designed with hook fixings, which were hung on to a series of reinforcing bars, which had been welded to the sheet pile after installation. The resultant void was then filled by an in-situ grout to form a composite wall. The panels were detailed with t & g jointing horizontally for location purposes, and splayed ends to allow them to be installed to a radius. The main contractor installed waterproof jointing as work proceeded, including stop-ends at the end of each shift to allow them to carry out the in-situ pour for each section before the next tide. Special panels were cast to accommodate the steps, floating platform and the slipway.
Special requirements / details:
The environment is an aggressive tidal flow in a marine environment. The panels were dimensioned to co-ordinate with the size of the dressed stone required, in order to empathise with the existing environment. The design allowed to withstand the pull-out forces of not only the panel to pile
fixing, but also the similar action on the cast-in dressed stone.
To download the full details – click here.
04 Rocwall - Wrexham Bandstand
Client: Wrexham Borough Council
Main Contractor: K M Construction St Asaph
Details: Occasionally the mundane becomes something rather different.
RPC Contracts were approached to provide a small retaining wall to form the base of a bandstand, to which the Client was going to attach cladding, depicting the Welsh National Anthem note form.
RPC proposed that we should produce precast walls as finished articles which would include the musical notes in the relief in the concrete face.
Following acceptance of our proposals, RPC had the images of the notes transcribed onto a latex liner which was placed into specially adapted moulds to produce exactly what the Client wanted but at a fraction of the budget.
To download the full details – click here.