By Bhushan Kapse
What is HPC structure?
· It is an RCC structure, used to pass water
from one side to other of road or canal structure.
·
The structure contains following parts
1. Tank
(upstream side)
2. Pipe
3. Wall
( downstream side)
1. Tank (upstream side)
· Tank is situated at the upstream side of
structure which is used to collect water from height.
· The structure of tank consists of four RCC wall, the walls must be battle wall.
Battle wall acts as a retaining wall so that it helps to oppose the forces which are exerted from water and soil.
· The height of wall is provided up to
ground level.
· Tank contains free space for water; this
space should be 1ft. RCC structure form bottom embankment.
2. Pipe
· Generally, 600mm to 900 mm diameter pipes
are used.
· The
pipe are placed at the level of NBL ( NBL is
level of naturally flowing water)
· Normally in India, 2.5 m pipe length is
used.
· According to the structure of HPC at
road or canal, numbers of pipes are decided.
· Pipes are fixed by using concrete, so that
water can flow through pipe from upstream to downstream.
3. Wall ( downstream side)
· It is most common RCC structure which contains
battle structure.
· The top width of wall is 300mm and pipes
re fixed at middle of wall.
· For 1m height, 0.45 m battle is provided
for the wall, so that load of water and pipes can be sustained.