MACHINE FOUNDATION
GROUP 2 PRESENTATION
INTRODUCTION
What is Machine Foundation?
A machine foundation is used to transmit the dynamic and static load to the
soil due to the weight of the rotating vibrating machine. The dynamic load is
little compared to the static weight of the machine.
FUNCTION
• Machine foundation is primarily built to be a base in which heavy machinery
will lay on
• It can be a simple mass of reinforced concrete in the soil
MACHINE FOUNDATION
4 TYPES OF MACHINE
FOUNDATIONS
1. Block Type Machine Foundation
This type of foundation consists of a pedestal resting on a
footing have has large mass and a small natural
frequency.
2. Box or Caisson Type Machine Foundation
The mass of this foundation is less than block type
machine foundation as it is hollow. The natural frequency
of the box type machine foundation is increased.
3. Wall Type Machine Foundation
This type of machine foundation consists of a pair of walls
with a slab resting on top. This type of foundation is
constructed of homogeneous materials. It is used for
small machines and the machine is rested on the top
slab.
4. Framed Type Machine Foundation
This type of machine foundation consists of vertical
columns with horizontal frame at their tops. It is used for
larger machines. The machines are rested on the top of
frames. The vertical and horizontal members of this
foundation can be constructed by different materials.
DESIGN CRITERIA FOR MACHINE
FOUNDATIONS
• The machine foundation should be safe from a bearing capacity failure
under static and dynamic loads.
• The settlement must be less than prescribed.
• The dynamic amplitudes of the machine foundation soil system must be
within the prescribed limits under service conditions.
• There should be no resonance, i.e. the natural frequency of the machine
foundation soil system should not coincide with the operating frequency of
the machine.
• Preferably, the center of gravity of the machine should lie in the same
vertical line as the center of gravity of the foundation system.
FOUNDATION MATERIALS
• Plain concrete
• Brick
• Steel
• Reinforced Cement concrete
• Pre-stressed concrete