At what depth is shoring required?
Depth of trench If the trench is five feet deep or more it must be shored or sloped. If there is a possibility of soil movement, even shallower trenches have to be shored. If you have doubt about it, shore/slope the trench.
What is the allowable width limit of a trench?
A Trench is a narrow excavation (in relation to its length) made below the surface of the ground. In general, the depth of a trench is greater than its width, and the width (measured at the bottom) is not greater than 15 ft (4.6 m).
Why is shoring needed?
shoring, form of prop or support, usually temporary, that is used during the repair or original construction of buildings and in excavations. Temporary support may be required, for example, to relieve the load on a masonry wall while it is repaired or reinforced.
What is shoring and underpinning?
The arrangement employed to prevent a damaged structure, due to either foundation settlement or other reasons from collapse, is called shoring. Shoring and underpinning. The arrangement employed to prevent a damaged structure, due to either foundation settlement or other reasons from collapse, is called shoring.
What are the types of shoring?
Here are several different shoring types that construction professionals use:
- H and I-beam shoring.
- Secant pile shoring.
- Contiguous pile shoring.
- Sheet piles.
- Diaphragm walls.
- Raking shoring.
- Hydraulic shoring.
- Soil nail shoring.
What is underpinning in civil engineering?
Underpinning is a sensitive construction technique for strengthening an existing foundation or placing a new foundation below the old foundation to a deeper depth. Underpinning is a sensitive repair project so, we have to choose the correct method for it.
Why is underpinning required?
Common reasons why underpinning may be necessary might include: Subsidence (changes in the condition of the soil) or poor soil properties which may have caused the existing building’s foundations to move. This may be due to natural causes such as earthquake, flood, drought, and so on.
SHORING AND UNDERPINNING 2. SHORING It is the means of providing support to get stability of a structure temporarily under certain circumstances during construction, repair or alteration. Such circumstance arises when 1.
What is a shoring system used for?
Shoring is used to support the beams and floors in a building while a column or wall is removed. In this situation vertical supports are used as a temporary replacement for the building columns or walls. Trenches – During excavation, shoring systems provide safety for workers in a trench and speed excavation.
What is temporary shoring in construction?
Temporary shoring of portions of the structure as required to prevent the structure from becoming unsafe during construction. Temporary shoring of excavations. Construction and removal of posts, timbers, lagging, braces, etc. required in connection with bracing, shoring, and underpinning the structure during construction.
What is underpinning in construction?
Underpinning is the process of strengthening and stabilizing the foundation of an existing building or other structure. Underpinning in Building Construction Underpinning may be necessary for a variety of reasons: The original foundation is simply not strong or stable enough, e.g. due to decay of wooden piles under the foundation.