Diaphragm wall shorings

What is a ground shoring system and what is it for? Particularities in the diaphragm wall

“A ground shoring is a temporary metal structure that replaces a future slab while excavation is in progress, absorbing the soil pressure behind the diaphragm walls.

The goal is that the diaphragm walls (designed to eventually work under bending moments and shear forces between slabs) have support points in the excavation stages leaving bending lengths similar to those that the diaphragm walls will have once the execution of the basement is finished and the slabs can bear loads.

As a rule of thumb, if a thorough analysis of the diaphragm walls is to be avoided, each future slab should be replaced by an equivalent level of shoring as close as possible to the slab itself.

The number of strut levels can be optimized (i. e. reduced) by re-analysing the diaphragm walls and checking that stresses, displacements and crack width are under control during all excavation stages. 

In the case of diaphragm walls shoring, the struts are anchored directly onto the diaphragm walls. INCYE’s modular systems do not require any embedded elements prior to our arrival. Once the diaphragm wall is finished, the number of anchors required is drilled with the help of a template, the anchors are installed using resins (provided Hilti or Wurth) and the anchor plate is bolted to the rods. The strut itself is then pinned to the anchor plate. Ours being a 100% modular and bolted system, all gaps are eliminated and the exact strut length is attained by tightening the jack that each strut carries.

Main ground shoring systems

INCYE’s ground shoring systems are based on three types of equipment: meccano formed by Megaprop beams and accessories, Granshor modular trusses system and Pipeshor tubular prop system.

Granshor

The Granshor truss system is designed to withstand high axial loads of up to 3,900 kN (ULS) per truss.

Pipeshor

The Pipeshor tube system is designed to withstand high axial loads of up to 7,900 kN (ULS) per strut.

Megaprop

The Megaprop beam system is designed to withstand high axial loads of up to 1,000 kN (SLS) per strut.

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SUCCESS CASES

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