workers make reinforcement for concrete foundation
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FOUNDATION REMEDIATION DESIGN (UNDERPINNING)

Underpinning is a generic term used to describe the process of modifying an existing foundation by adding support. Underpinning of a buildings foundations are required when the subsoil below the foundations has weakened or the foundation constructed are under designed and in some cases can be a combination of both.

Services

Design
Negotiations with Insurance companies
Tender
Supervision
Stage payment certification and certification of works
Hydrostatic testing of drainage

 

Underpinning of a structures foundation can be resolved by a number of methods

Pile and Cantilever Beam
Cantilevered pile-caps are usually used to try and avoid disturbing the inside of the building. This system requires the design and construction of tension and compression piles to each pile cap.

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  • Pile and Beam

Utilization of mini piles installed either side of the wall and connected using a beam through the supporting wall.

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  • Mass Concrete or Traditional Underpining

Construction of a foundation below the structure where one may not exist or is inadequate. Excavation of the unsuitable material and replacement with mass concrete poured in alternate bays, generally 1m x 1.2m and 0.6 m in depth.

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  • Pressure Grouting

A process of injecting a cement mixture (low slump) under the ground and into lose soils. This process is typically continually injected to form a column or a big “bulb” or material

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