Temporary works
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Transcript of Temporary works
AHEMEDABAD INSTITUTE OF TECHNOLOGY
SEMINAR
TEMPORARY WORKS
CIVIL ENGINEERING (3rd sem)B.ESUBJECT: BUILDING CONSTRUCTION
Submitted by:
Patel Bhavik (D2D)
Patel Parth (D2D)
Bhavsar Zalak(D2D)
Dodia Margi
Limbhachya setu(D2D)
What are temporary works?
O Temporary works (TW) are the parts of a
construction project that are needed to
enable the permanent works to be
built. Usually the TW are removed after
use.
O EX- Scaffolding
Timbering in trenches
Shoring
Underpinning
Timbering in trenches
Various Method of Timbering
Stay bracing
Box sheeting
Vertical sheeting
Runners
Sheet piling
Stay Bracing
O Used method –Firm
ground & depth
of excavation
does not exceed 2 m.
Box Sheeting
O Used method- loose soil & depth of
excavation does not exceed 4 m.
O A box like structure is formed by
providing polling board, wales & struts.
Vertical Sheeting
O This method is adopted
for deep trenches
(up to 10 m depth)
in soft ground.
O The method is similar
to box sheeting except
that the excavation is
carried out in stages
and at the end of
each stage an offset
is provided.
Runners
O In case of soft ground
runner system is
provided.
O The system is similar
to vertical sheeting.
Sheet piling
This method is used
I. Soil to be excavated is loose or
soft.
II. Width of trench is large.
III. Depth of excavation is large.
IV. Sub soil water is present.
What is Scaffolding?
Scaffolding, also called staging, is a
temporary structure used to support
people and material in the construction or
repair of buildings and other structures.
OTypes of scaffolding
I. Single scaffolding
II. Double scaffolding
III. Needle scaffolding
IV. Trestle scaffolding
V. Suspended scaffolding
VI. Steel scaffolding
VII. Patented scaffolding
Single scaffolding
This is the most common type of
scaffolding and is widely use in the
construction of brickwork..
It consist of a single row of standards
placed at a distance of about 1.20m from
the wall.
Standard are placed at 2 to 2.5 m interval.
Double Scaffolding
This scaffolding is stronger than the single
scaffolding.
It is used in the construction of stonework.
Needle ScaffoldingO Used:
Ground is week to support
the standards.
Construction of upper part
of the wall is to be carried out.
It is required to keep the
ground near wall , free
for traffic etc.
Trestle Scaffolding In this type of scaffolding,
the working platform is
supported on movable
contrivances movable on
wheels.
Use: painting , repair work
What is Shoring? Shoring is the construction of a temporary
structure to support temporarily an unsafe
structure.
Types of Shoring
Raking Shores
Flying Shores
Dead Shores
Raking Shores
This is a system of giving temporary
support to an unsafe wall.
The construction of raking shore, varies
with the condition at site.
In this method In this method inclined
members called rakers are used to give
lateral support to the wall.
Flying shores
In this type of shoring horizontal supports
are provided for supporting temporarily
the parallel walls of the two adjacent
buildings which may tend to collapse or
damage.
If the walls are quite near to each other
(up to 9m) single flying shore can be
constructed.
When the distance between two parallel
walls is more than 9m a double shore can
be constructed.
Dead shores
Such type of shoring is provided for the
following purposes:
Rebuild the defective lower part of the
wall.
Rebuild the existing foundation.
To make large opening in the existing wall.