Excavation Support Systems


Shoring is an essential construction technique that is employed to provide temporary support and stability during excavation and construction activities. It involves the strategic installation of a range of systems and elements to prevent the soil from collapsing and structures from failing. The primary purpose of shoring is to ensure the safety of workers, protect neighboring structures, and maintain the integrity of the construction site.

Shoring systems encompass a variety of components, such as vertical or horizontal elements, including piles, beams, struts, sheet piles, or soldier piles with timber lagging. These elements are strategically placed and reinforced to bear and distribute the loads exerted by the surrounding soil or existing structures. By transferring these loads, shoring prevents soil movement, cave-ins, and structural failures that can pose significant risks to personnel and adjacent properties.

The selection of a particular shoring method depends on several factors, including the type of soil, the depth and dimensions of the excavation, and the specific requirements of the project. Geotechnical engineers and construction professionals carefully evaluate these factors to design and implement an appropriate shoring system that provides the necessary support and stability.

Overall, shoring is a critical aspect of construction that ensures the safety and structural integrity of excavation sites, allowing construction projects to progress smoothly while minimizing risks and potential damages.


Pile Beams with Timber lagging

A pile beam with timber lagging is a construction technique used to support excavations. It involves driving vertical piles into the ground and then installing horizontal timber boards, known as lagging, between the piles. The lagging provides temporary support to the surrounding soil, preventing it from collapsing into the excavation.



Pile Beam with Timber Lagging and Tieback Anchors

In cases where additional stability is required, anchors can be used along with the pile beam and timber lagging. Anchors are typically installed by drilling into the ground beyond the excavation and securing them to the lagging or pile beam. The anchors help to resist lateral forces and increase the overall stability of the excavation.




Struts are structural elements used to support or brace an excavation. They are usually installed horizontally between the pile beams or sheet piles. Struts transfer the load from the ground and the supported structure to the piles or sheet piles, thereby preventing the excavation from collapsing.





Deeper Foundation Support


Secant Piles

Secant piles are a type of deep foundation element used to create structural walls or cutoff walls. They are constructed by drilling overlapping primary and secondary piles into the ground. The primary piles are typically reinforced concrete piles, while the secondary piles are usually made of a softer material, such as unreinforced concrete. The interaction between the primary and secondary piles creates a continuous wall that provides excellent structural integrity.


Secant Piles with Tieback Anchors

Secant piles can be further reinforced with the use of anchors. Similar to the pile beam with timber lagging, anchors are installed through the secant pile wall and secured into the surrounding soil or rock. The addition of anchors enhances the stability of the secant pile wall, allowing it to withstand higher lateral loads and providing additional support to the excavation.


Tangent Piles

Tangent piles are vertical piles installed in a row along the excavation perimeter without overlapping. They are driven or drilled into the ground at a slight inclination, providing lateral support to prevent soil collapse.

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