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Design of Liquid Storage Structures

This document discusses different types of liquid storage structures or water tanks. It covers the following key points: - Water tanks can be categorized based on their placement (resting on ground, underground, or elevated) or shape (circular, rectangular, spherical, etc.). - Circular tanks resting on the ground are further divided based on whether the base is flexible or rigid. A flexible base allows the tank diameter to increase at the bottom due to hydrostatic pressure, while a rigid base prevents movement. - Proper cement content between 330-530 kg/m3 is recommended for water tanks to reduce shrinkage and ensure the structure is crack-free with no leakage.

Engineering◦
LIQUID STORAGE STRUCTURES UNIT 3 Mr. A. ANANTHAKUMAR ASSISTANT PROFESSOR 1
WATER TANKS 2
3
Learning out Come • REVIEW • TYPES OF TANKS • DESIGN OF CIRCULAR WATER TANK RESTING ON GROUND WITH FLEXIBLE BASE • DESIGN OF CIRCULAR WATER TANK RESTING ON GROUND WITH RIGID BASE 11
• INTRODUCTION 12 • Storage tanks are built for storing water, liquid petroleum, petroleum products and similar liquids • Designed as crack free structures to eliminate any leakage • Permeability of concrete is directly proportional to water cement ratio. • Cement content ranging from 330 Kg/m3 to 530 Kg/m3 is recommended in order to keep shrinkage low.
13 WATER TANK BASED ON PLACEMENT OF TANK BASED ON SHAPE OF TANK 1. RESTING ON GROUND 2. UNDER GROUND 3. ELEVATED 1. CIRCULAR 2. RECTANGULAR 3. SPHERICAL 4. INTZ 5. CONICAL BOTTOM
14 RESTING ON GROUND
15 UNDERGROUND
16 ELEVATED
17 CIRCULAR
18 RECTANGULAR
19 SPHERICAL
20 INTZ
21 CONICAL BOTTOM
Circular Tanks Resting On Ground 22
• The tank has tendency to increase in diameter due to hydrostatic pressure • This increase in diameter all along the height of the tank depends on the nature of joint at the junction of slab and wall 23
24 Tank with flexible base Tank with rigid base
• When the joints at base are flexible, hydrostatic pressure induces maximum increase in diameter at base and no increase in diameter at top • When the joint at base is rigid, the base does not move 25
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