During construction it is often necessary to form a stable excavation and to ensure that any associated movement will not damage neighbouring structures or utilities. Keller offers flexible solutions to solve even highly complex excavation support problems both in a temporary or in a permanent condition.
- Support excavations
- Shore existing adjacent structures
The design and construction of excavation support systems can be complex due to the soil structure, depth of cut and ground water, weather conditions, superimposed loads, seismic loads, vibrations, and adjacent construction. The design must address stability of the excavation bottom when below the water table.
Buildings, construction equipment, and stockpiled materials located adjacent to an excavation result in lateral loads on the retention system. Underpinning of adjacent structures can reduce the loading on an excavation wall and reduce the risk of building settlement. Excavation shoring can be affected by vibrations from traffic, railways, blasting, and machines operated in adjacent buildings.
Common permanent and temporary shoring systems include steel sheet piling, soldier piles and lagging, jet or chemical grouting, secant or tangent piles and soil nail walls. Anchors or bracing can be used to provide lateral support of sheeting and shoring systems. Access shafts for tunneling and trenchless construction may involve a circular shoring system designed as a compression ring. Construction shoring for excavations that are open for extended periods of time may require protection from weather conditions.
Extreme caution must be used during any shoring excavation and safety is of utmost importance. We understand the hazards associated with earth shoring and the importance of trench safety. We are the shoring company with experience and the full range of techniques to provide reliable excavation support.