V. 07-21
www.plycem.com
V. 10-21
www.plycem.com
3
INSTALLATION GUIDE FOR EUREKA CISTERN TANK
Step 5
Lower the Tank Cistern with the help of a polín supported on a
simple wooden structure and a pulley. Avoid stones or other objects
between the concrete floor and the base of the tank to avoid
damaging the tank. damage to it. Center the tank in the excavation.
20 cm
25 cm
25 cm
According to potential
of expansion
According to potential
of expansion
Rope
Pulley
Wooden
structure
Step 3
Place at the bottom a concrete slab or template with welded mesh.
It should be clean, leveled and flat to allow for a uniform the base
of the Tank Cistern. The concrete slab should have a minimum
thickness of 5 cm for 1200 and 2800 lt tanks and 10 cm for 5000
liters tanks. In soft soils it is recommended the walls be coated.
This coating will be of 3 cm in a proportion of 1 part cement to 3
parts cement with fabric or chicken wire mesh anchored with short
stretches of rods spaced at 50 cm intervals.
Step 6
According to the results of the free expansion test carried out on the
material where you will install your tank, it will be known if the material
produced by the excavation can be used as backfill as it was removed
from the excavation. If so, 20 cm layers will be placed and compacted
with manual equipment.
It is important to fill the cistern with water to prevent the cistern from
deforming under the weight of the material and to facilitate the com-
paction.
Step 4
The depth of the excavation will be the height of the tank to be
installed plus 20 cm, considering the thickness of the concrete slab.
Concrete slab or flat slab
Reinforced wall with mesh and coating
Step 2
Perform the following test and determine the expansive potential
of the soil where your tank will be installed.
1.- Take a clod of soil and grind it into fine soil.
2.- Place this material inside a glass or jar with vertical walls,
measure the height that the land reaches inside the glass or jar
(initial h) with the help of a ruler or tape measure.
3-Now add water until the volume of fine soil is completely covered
and let it rest for at least 1 hour to allow the expansion of the
material.
4.- After this time measure the final height (h final) reached by the
volume of fine soil.
5.- Finally, determine the free expansion potential, substituting the
values as follows:
% Expansion [(initial h - final h) / initial h)] x 100
The bottom of the excavation should be 50 cm larger than the
diameter of the tank.
% Expansion
Potential for free
expansion
Top Excavation
Diameter
% < 10
Does not exist
Same as bottom
10 - 25
Very low
Ø Fund + 50 cm
26 - 50
Under
Ø Fund + 100 cm
51 - 100
Medium
Ø Fund+ 150 cm
% > 100
High
Ø Fund + 200 cm
