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Shoring - Avoiding a Deadly Collapse

Written by; Markus MacIntyre / TCCN Staff Writer
Added on: Sun Jul 12 2009

  


Shoring

Shoring is a term used in construction, to refer to the process of building temporary structures for supporting a structure to avoid collapse during an actual construction or during a repair. Shoring can also refer to the material used for shoring purposes. Timber is mostly used to support the walls and they are placed in a slanting position, upward against the wall. The weight of the wall is transferred into the timber for firm support.

Basically, shoring material provides safety for construction workers and prevents wastage of money and construction materials when walls collapse.


Trench shoring on the other hand is used to refer to the process of supporting trench walls to prevent collapse. Trench shoring materials include metal or timber and they prevent the trench wall from collapsing and caving in. It also maintains the intended shape of the walls in trench.

There are several techniques of shoring. Most commonly used include raking shore, hydraulic shoring, beam and plate, soil nailing, and continuous flight augering.

Raking shore involves placing timbers at an angle of between sixty and seventy degrees between the construction wall and the ground.

Hydraulic shoring on the other hand uses hydraulic pistons which are pumped upwards until they press the trench walls for support. They are combined with steel plates or thick plywood.

Beam and plate are placed in the ground and steel plates are inserted amongst them. This is similar to soldier boarding but the later uses wood planks instead of steel plates. Soil nailing involves sloping of soil where walls are supported by inserting slender steel bars for reinforcement. The bars are installed into a drilled hole and then grouted into place at a slight downward inclination.

Continuous flight augering on the other hand involves creation of concrete piles to support soil as excavation takes place. It is used to excavate a hole and concrete is inserted through a hollow shaft under intense pressure as the auger is extracted at the same time.

Shoring should be carefully designed so that when the weight is transferred from the shoring material to the walls, there should be no problem. It is the duty of every construction engineer to arrange for shoring when it is necessary and give the specifications for its construction. When shoring is not done when necessary, the lives of construction workers are put at a risk and even the members of the public and the occupants of the neighboring buildings. The building owner can incur additional expenses if the collapse occurs due to neglect of shoring. A clever system of shoring designed to facilitate safety, can save the clients or the owners money especially when shoring is done such that it can be moved around on a large contract and reused without dismantling it.

In general, shoring reduces and prevents unsafe conditions at construction sites. Contraction sites have recently become chaotic and dangerous and one way to avoid injuries and accidents is to design shoring so as to prevent caving in of walls.

  

Copyright: 2009 TCCN.ca








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