appropriate law cost techniques in rural water supply schemes
Post on 23-Feb-2016
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APPROPRIATE LAW COST TECHNIQUES IN RURAL WATER SUPPLY SCHEMES
H,M.GUNAPALA(E/A)RWS-Unit MonaragalaMAHINDA DISSANAYAKERWS-Unit Badulla
WHY WE NEED LAW COST TECHNIQUES ?
To minimized the overall cost in rural water supply scheme’s
WHAT ARE THE LAW COST TECHNIQUES
Ferrocement Ground reservoir's Ferrocement elevated Tanks Ferrocement roughing filter’s Ferrocement Slow sand filter’s
FERROCEMENT TECHNIQUES COULD BE BEST OPTION
Plastic shell roughing filter’sPlastic shell rainwater harvesting tank
Other techniques
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Ferrocement Ground reservoir's
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FERROCEMENT ELEVATED TANKS
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FERROCEMENT ROUGHING FILTER’S
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FERROCEMENT SLOW SAND FILTER’S
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PLASTIC SHELL ROUGHING FILTER’S
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PLASTIC SHELL RAINWATER HARVESTING TANK
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SRI LANKA CHRONOLOGICAL ORDER 1980 –Sarvodaya/Danida Project(capacity up
to 10 - 15 Cm) 1990 – CWSSP Project (capacity up to 40
Cm) 1995-NWS&DB – Small town water supply
and sanitation project (capacity up to 40 Cm)
2000-NWS&DB – ADM 3rd project (capacity up to 100
Cm)
HOW TO CONSTRUCT FERROCEMENT TANK ?
Tank Base Tank wall Tank Dome
PARTS OF FEROCEMENT TANK
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TANK BASE
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TANK WALL
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TANK DOME
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CONSTRUCTION MISTAKES OCCURRED DURING CONSTRUCTION PERIOD Pipes arrangement (inlet,outlet &wash out pipe) not
placing correct place Tank wall not align correctly Dome is not construct ' correct shape Wall thickness is increased than recommended thickness 4.5 mm dia GI wire not connected to base properly 4.5 mm dia
GI wire is not fixed to the wall in correct distance Neglect water cement ratio Neglect quality of materials Curing is not done properly
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PIPES ARRANGEMENT (INLET,OUTLET &WASH OUT PIPE) NOT PLACING CORRECT PLACE
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TANK WALL NOT ALIGN CORRECTLY
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DOME IS NOT CONSTRUCT ' CORRECT SHAPE
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4.5 MM DIA GI WIRE NOT CONNECTED TO BASE PROPERLY
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4.5 MM DIA GI WIRE IS NOT FIXED TO THE WALL IN CORRECT DISTANCE
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OUT COMES OF CONSTRUCTION MISTAKES Tank will be out of shape Water leak can be occurred Construction cost would be increased Durability of the tank would be decreased
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TANK WILL BE OUT OF SHAPE
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WATER LEAK CAN BE OCCURRED
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COMPARISON OF FEROCEMENT TANK &CONCRETE TANK(ADB 3RD PROJECT-MONARAGALA)
Table -01
Table -02
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Tank option
Cost in SLR
Tank Base concrete
Wall concrete
Concrete cover slab
Ferro cement wall & dome
Structural frame work
R/F & mesh
shuttering Pipes, specials etc
Total
50 cum Ferro cement tank
20020
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37240
---- 50820
---- 46480 154560
50cum concrete tank
58870
79520
23450
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---- 134890 66640 49630 413000
60 cum Ferro cement Tower
66500
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47250
91630 208460 107660 144130 585900
60 cum concrete Tower
84770
134400
32200
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161700 30930 195300 161000 1078700
Table 1
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Description
Cost for Ferro cement tank SLR
Cost for concrete tank SLR
Percentage reduction compared to concrete tank
30 cum ground tank110740 280000 60 %
50 cum ground tank154560 413000 67 %
30 cum elevated tank 6.8m (height)341180 585900 42 %
60 cum elevated tank 9 m (height) 665630 1078700 38 %
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HOW TO REPAIR FERROCEMENT TANKS
VIDEO – 01VIDEO – 02VIDEO – 03
How to repair ferrocement tanks
ADVANTAGES OF FERROCEMENT TECHNOLLOOGY Law cost for general types of constructions Simplicity in technology Not much skill labour required Required tools and equipment can be found
easily Light weight and therefore easy handling Easy repairs and maintenance Adequate strength for rural development Adequate durability Protection against sunshine and flooding Easy removal
OTHER APPLICATION OF FERROCEMENT TECHNIQUES Intake well dome Water pond Patrician wall Domestic water storage tank Rainwater harvesting tanks toilets Chlorine house
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INTAKE WELL DOME
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INTAKE WELL DOME
VIDEO
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WATER POND
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PATRICIANS WALL
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DOMESTIC WATER STORAGE TANK
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RAINWATER HARVESTING TANKS
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TOILETS
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OTHER APPLICATION-FOREIGN COUNTRIES
OTHER APPLICATION-FOREIGN COUNTRIES
Other application-foreign countries
THANK YOU
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