Design of Underground R.C Rectangular Water Tank in Expansive Soil

Abstract

The need for a water tank is as old as civilization, to provide storage of water for use in many applications. Design of water tanks is a time consuming task, which requires a great deal of expertise. All tanks are designed as crack free structure to eliminate any leakage. An underground water storage tanks used for underground storage of drinking water, wastewater & rainwater collection. The study includes the design of rectangular tank in expansive soil that how the shape deflected and what are the actions will be produced when tank empty or full. This study aims to give idea for safe analysis and design of underground reservoirs in a scalable soil due to moisture changes due to the presence of metal materials with a poetic characteristics. Design has been made for the supported walls first without toe and found it unsafe, this led to consider toe with width B\3, it found the walls exposed to a tensile strength, this could be prevented by increasing toe width from 1.066 m to 1.733 m which gave good result when checked. The study helps in understanding the design philosophy for the safe design of ground water tank, in which wall of tanks subjected to pressure and the base is subjected to weight of water. In this study tank made of reinforced concrete and resting on ground monolithic with the base are designed, and showed good results when checked for design.