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.