EARTHWORK SUPPORT
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For earthwork support; It is important to access how long an excavation can safely remain open without aid for the sides. If the weather is very dry, then the lack of moisture may cause the soil to shrink, crack before falling in. Generally the looser the soil the more it needs to be supported.
If the soil is very wet, then the aides pf tge excavation may become unatable. In both cases it is advisable and better to provide temporary supports to the sides of the excavation. Excavation on a confined site may also need support in case heavy loads are placed or driven to close the edges of the excavation.
Earthwork support retain the size of excavation collapsed during the time the excavation will remain open. The process of providing temporary support to the sides of an excavation is referred to as TIMBERING. It is sometime planking and strutting.
Timbering is done to;
• Protect the operatives while working in excavation.
• Keep the excavation open by acting as a retaining wall to the sides of the trend.
• Prevent drainage to adjacent structures that could be caused by excavation.
• Enable work to proceed within the excavation without any sort of hinderance.
COMPONENTS OF TIMBERING
Pollings: these are vertical planks supporting the soil. In sand or gravel, they should be placed closely enough to form a timber wall.
Depending on the soil type and working conditions, they may be placed about 900mm apart. The purpose or reason of the wailings is to keep the soil on the sides of the excavation from falling in.
Wailings: these are sets of horizontal timber strips supporting the polings.
Struts: These are the timbers that span across the trench between the wailings. The strut performs the task of holding the opposite walls of the excavation in place.
Wedges: are pieces of timbers used to sustain the pressure of the polings against the soil. If the soil expands or shrinks while the work is carried out, the wedges may need to be re-adjusted again.
FACTORS TO BE CONSIDERED IN PROVIDING EARTHWORK SUPPORT.
• The nature of the soil
• The depth of excavation
• The width of excavation
• The type of work carried out
• How long the excavation will be left open
• Moving materials into excavation
• The type of support system used.
-archbaheez.blogspot.com
Please Share
For earthwork support; It is important to access how long an excavation can safely remain open without aid for the sides. If the weather is very dry, then the lack of moisture may cause the soil to shrink, crack before falling in. Generally the looser the soil the more it needs to be supported.
If the soil is very wet, then the aides pf tge excavation may become unatable. In both cases it is advisable and better to provide temporary supports to the sides of the excavation. Excavation on a confined site may also need support in case heavy loads are placed or driven to close the edges of the excavation.
Earthwork support retain the size of excavation collapsed during the time the excavation will remain open. The process of providing temporary support to the sides of an excavation is referred to as TIMBERING. It is sometime planking and strutting.
Timbering is done to;
• Protect the operatives while working in excavation.
• Keep the excavation open by acting as a retaining wall to the sides of the trend.
• Prevent drainage to adjacent structures that could be caused by excavation.
• Enable work to proceed within the excavation without any sort of hinderance.
COMPONENTS OF TIMBERING
Pollings: these are vertical planks supporting the soil. In sand or gravel, they should be placed closely enough to form a timber wall.
Depending on the soil type and working conditions, they may be placed about 900mm apart. The purpose or reason of the wailings is to keep the soil on the sides of the excavation from falling in.
Wailings: these are sets of horizontal timber strips supporting the polings.
Struts: These are the timbers that span across the trench between the wailings. The strut performs the task of holding the opposite walls of the excavation in place.
Wedges: are pieces of timbers used to sustain the pressure of the polings against the soil. If the soil expands or shrinks while the work is carried out, the wedges may need to be re-adjusted again.
FACTORS TO BE CONSIDERED IN PROVIDING EARTHWORK SUPPORT.
• The nature of the soil
• The depth of excavation
• The width of excavation
• The type of work carried out
• How long the excavation will be left open
• Moving materials into excavation
• The type of support system used.
-archbaheez.blogspot.com
Please Share
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