Upload
syeda-nusrath-fathima
View
244
Download
11
Embed Size (px)
Citation preview
DESIGN OF OVERHEAD CIRCULAR WATER TANK
WITH FLAT BASE
PRESENTED BY,SYEDA NUSRATH FATHIMA
INTRODUCTION TO WATER TANKS
TYPES OF ELEVATED WATER TANKS
SUPPORT SYSTEM OR STAGING
DESIGN PRINCIPLES
DESIGN EXAMPLE
2
CONTENTS
To study the Analysis and Design of elevated water tanks.
To study the guidelines for the design of liquid retaining structure according to IS Code IS: 3370 part 2-2009 & IS: 456:2000.
To know about the design philosophy for the safe and economical design of water tanks.
3
OBJECTIVES
For storage of large quantities of water, tanks are required.
INTRODUCTION
WATER TANK
BASED ON PLACEMENT OF
TANK
BASED ON SHAPE OF
TANK
1. UNDER GROUND 2.RESTING ON
GROUND3. ELEVATED
1. RECTANGULAR2. CIRCULAR
3. INTZE4. SPHERICAL
5. CONICAL
Tanks used to supply water through gravity are termed as Elevated water tanks.
Elevated tanks may have circular or rectangular section with flat or Conical bottom.
For small Storage capacity, tanks square in plan are economical. Where as for large capacities circular tanks prove economical.
They may be made of masonry, steel, reinforced concrete and pre stressed concrete.
RCC tanks are very popular as, Simplicity in construction and design Cheap monolithic in nature Can be made leak proof.
IntzeCircular
Spherical bottom Domed bottom Conical bottom
Rectangular
7
COMPARISON OF TANKSRECTANGULAR
TANK CIRCULAR TANK INTZE TANK PRESTRESSED TANKS
For smaller capacities
rectangular (square) tanks are
economical.
For large capacities circular tanks are
economical.For same capacity, circular tanks requires less concrete
than rectangular tanks.On account of circular
shape, it can be made water tight easily as there
are no sharp corners.
Intze tank is constructed
to reduce the project cost
because lower dome
in this construction
resists horizontal
thrust
For bigger tanks,
prestressing is the
superior choice
resulting in a saving of up to 20%.
Elevated tanks are supported on staging which may consist of Masonry Shaft, R.C.C tower or R.C.C. column braced together with tie beams.
SUPPORT SYSTEM FOR RECTANGULAR TANKS
•The simplest form is Rectangular tanks supported by beams and four columns.•With increase in plan area, Internal beams and columns are introduced to limit the span.
SUPPORT SYSTEM FOR CIRCULAR TANKS
Circular beamMasonry tower 4 beams mutually orthogonal2 beams mutually orthogonalInternal beams and ColumnsSingle Annular shaft
Design of Tank• Cover slab or Top dome
• Top ring beam
• Side walls or Cylindrical wall
• Base slab
Design of Staging
Design of Foundation
DESIGN OF ELEVATED WATER TANKS
THANK YOU