Retaining Walls Soil Nailing Reinforced Soil
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Welcome to Retaining Walls, Soil Nailing and Reinforced Soil specialist Phi Group. Phi Group is the largest retaining solution specialist in the UK, designing supplying and building retaining structures including timber crib and concrete crib retaining walls, soil nailing, soil panels, modular block reinforced soil systems, concrete panel faced reinforced soil and planted/grassed reinforced soil slopes. A complete service is offered including design, supply and construction undertaken by the company’s in house chartered engineers and backed up by full indemnity insurance. Based in Cheltenham with regional offices in Wetherby and Dunfermline the company is at the forefront of retaining structure technology balancing engineering demands with environmental consideration. Phi Group’s own directly employed experienced construction teams, operate nationwide completing the total design, supply and build package, thus affording, optimum peace of mind and minimum risk, to client and contractor alike. For an audience of 10 or more people the company offers a complimentary lunchtime CPD presentation at your offices. The seminar identifies the primary reasons for using retaining structures and how cost and programme savings can be made by utilising the latest retaining wall and soil stabilisation techniques. Phi Group’s procedures follow an Integrated Management System which has resulted in ISO 9001, ISO 14001 and ISO 18001 accreditation. Full Link Up accreditation enables Phi Group to provide engineering solutions to the railway sector and many products have BBA technical approval. If you have a project requiring a retaining structure, Phi Group will be happy to supply you with a free quotation, please send us your existing and proposed levels survey together with any available site investigation information.

Index Gravity Retaining Walls Gravity walls use their self weight to counteract the earth pressures and surcharge loadings and can be constructed from various systems Permacrib Andacrib Gabions Lockstone 4-7 Soil Nailing and Facings Soil Nailing is a method to stabilise existing embankments using grouted steel bars. A facing can then be applied to create the required aesthetics, be it grass, flexible, or hard facings. Soil Panel (Stone Filled) Soil Panel (Grass face) 8-11 Reinforced Soil Solutions The use of reinforced soils is mainly used in areas of fill to support elevated levels. These...

4 Gravity Retaining Wall Solutions Permacrib is our timber crib retaining wall system using patented interlocking components. These components form a series of open cell modules which are filled with well graded crushed stone to create the required mass. Permacrib’s lightweight components mean that the system is built by hand with no special plant requirements enabling extremely fastproduction rates. Permacr Application Uses include simple landscaped walls and major civil retaining structures. Additionally, Permacrib can be used to provide a landscaped and aesthetically pleasing face to...

Mitigation of Greenhouse Effects Trees are the lungs of the earth - absorbing CO2 and converting it to oxygen. Mature trees absorb less C02 therefore by harvesting and re-planting with young specimens a constant cycle of C02 absorption is ensured. Manufacture and construction are very simple and requires low levels of energy. Sustainability Timber for the Permacrib system meets the requirements of the “UK Government Procurement Policy” as being from both a legal and sustainable source. Landscaping Permacrib can be fully landscaped with a variety of plants in order to enhance its natural...

6 Gravity Retaining Wall Solutions Andacrib Andacrib is a modular pre-cast concrete crib retaining wall system which has been designed to cater for the most onerous loading conditions demanded of structures in highway, industrial and commercial sectors. Andacrib’s unique design, incorporating generous header to header bearing surfaces, ensures that all primary loads are remote from the exposed face. The design also allows for the various header lengths to be mixed within the same structure for maximum economy whilst maintaining a consistent visual appearance. Andacrib header units can be...

Gabions Gabions are a series of stone filled rectangular steel baskets/cages which can form a gravity retaining wall, the mass of which is designed to resist the earth pressure. They can also be used for self-standing structures or for cladding to buildings for aesthetic reasons. These rectangular boxes are formed from panels of wire, either using triple twisted woven mesh or square welded mesh, and both incorporate internal diaphragms and bracing wire to enhance stability and shape. WOVEN MESH Woven Mesh is ‘triple twisted’ mesh framed by thicker selvedge wires, manufactured to comply with...

8 Soil Nailing and Facing Systems Phi Group offer a complete design, supply and installation service using drilling and grouting techniques to stabilise embankments. A large range of plant is maintained to ensure that production rates are optimised in challenging soil types and restricted access situations. Soil Nailing With available development land becoming ever more costly, gaining usable space on steeply sloping sites is paramount, Soil Nailing can offer the following benefits: • Soil Nailing techniques are often an ideal solution, combined with Phi Group’s range of facing products,...

Typical applications for Soil Nailing: • Stabilising steep cuttings to maximise development space. • The stabilising of existing over-steep embankments. • Soil Nailing through existing concrete or masonry structures such as failing retaining walls and bridge abutments to provide long term stability without demolition and rebuild costs. • Temporary support can be provided to excavations without the need for bulky and intrusive scaffold type temporary works solutions.

10 Soil Nailing and Facing Systems Facings Whilst Soil Nails are an effective ground stabilisation technique, they are usually not left uncovered due to soil erosion problems and aesthetic concerns. Phi Group’s ability to combine Soil Nailing with a variety of face treatment options, including Permacrib walls, Soil Panel and Modular Block facings will ensure that the most stringent of planning and environmental issues are satisfied. Soil Nailed slopes can also be enhanced by planting.