When should you support excavation?
At least once in every day during which persons are at work there. If more than 2 metres deep, at the start of each shift before work begins. After any event likely to have affected the strength or stability of the excavation or the shoring. After any accidental fall of rock, earth or other material.
How deep can an excavation be without shoring?
How Deep Can a Trench Be Without Shoring? Trenches with a depth of 5 feet (1.5 meters) or greater need a protective system unless the entire excavation is in stable rock. If there is anything less than 5 feet, it is up to a competent person’s discretion to determine if there is a need for a protective system.
What are excavation supports?
Excavation support systems are used to minimize the excavation area, to keep the sides of deep excavations stable, and to ensure that movements will not cause damage to neighboring structures or to utilities in the surrounding ground.
What is shoring for excavation?
Shoring is the provision of a support system for trench faces used to prevent movement of soil, underground utilities, roadways, and foundations. Shoring or shielding is used when the location or depth of the cut makes sloping back to the maximum allowable slope impractical.
What is excavation support?
Support of Excavation (SOE) Systems are temporary earth-retaining systems intended to control the soil to facilitate a safe and efficient space for construction. In some instances the SOE System can double as permanent structural support.
How do you stop an excavation from collapsing?
Trench collapse risks can be minimized by shifting the soil weight away from the trench opening. Trench collapses can also be minimised by placing trench sheets on both sides of the trench.
What is the basic types of shoring?
There are two basic types of shoring, timber and aluminum hydraulic.
Why do we need support for excavation?
What system supports the side of an excavation?
“Shoring (Shoring system)” means a structure such as a metal hydraulic, mechanical or timber shoring system that supports the sides of an excavation and which is designed to prevent cave-ins.