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.
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