GORTER CONTROLS COCON 26 N-LP, Руководство оператора

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Operators manual
Gorter-Controls B.V. – Schoonhoven- The Netherlands
Operators manual underground gas pressure reducing station
Type: COCON 26 N-LP
Page 14
4.5.1 Soil condition and foundation
Depending on the composition of the soil, a concrete foundation (plate) under the station may be
needed, to prevent the station from sinking. With the following soil compositions a foundation is
necessary:
-
Organic soil compositions such as peat, humus and gardening soil.
- Very fine grained soil compositions (clay plates) such as clay, bolder clay, sandy clay and
compost.
We also advise you to use a foundation under the station with fine grained soil compositions, such as
loam, sandy clay, silt and loess. Use concrete as foundation material.
A foundation is not necessary with moderate rough grained soil compositions, such as sand, gravel
sand, wind born sand deposit and sandy plates.
The foundation must be at least 80 millimetres thick. Ensure that you do not only take the weight of
the station into account, while calculating the thickness of the foundation, but also take extra weight
into account. (For example, the placing of a vehicle on the pit cover).
The width x length of the foundation must be a minimal of 1x1½ meters. Ensure that the top of
foundation plate is levelled.
4.5.2 Pit dimensions
The pit depth depends on the thickness of the foundation. To determine the pit depth of a non ground
sunk station (pit cover above ground level), always use the following formula:
depth pit = 980 + d
f
Fill in the thickness of the foundation d
f
in millimetres. The number "980" is the distance from the
bottom of the casing to halfway the pit cover frame. The result - the depth of the pit to be dug - is in
millimetres.
To determine the pit depth of a ground sunk station (pit cover at ground level), always use the
following formula:
depth pit = 1054 + d
f
Fill in the thickness of the foundation d
f
in millimetres. The number "1054" is the distance from the
bottom to the top of the casing. The result - the depth of the pit to be dug - is in millimetres.
Example:
For a foundation plate (d
f
) that is 100 millimetres thick, the pit depth, for a non ground
sunk station is 980 + 100 = 1080 millimetres.
For a foundation plate (d
f
) that is 100 millimetres thick, the pit depth for a
station equal to ground level is 1054 + 100 = 1154 millimetres.
Dig a funnel shaped hole, so that you can easily attach the supply and discharge pipes to the casing.
Fasten the piping - tension free - in the clamps, which are attached to the foundations. Delivery of a
complete foundation - supplied with a positioning frame for the casing and fastening clamps for the
piping - is possible.