12
DPT260
1.
Dig an excavation of about mm 1000 x 1000 section and of 1200mm depth
(PIC. 1)
.
2.
Ensure that the soil has a good permeability (read the specific procedure at chapter 5.2).
NOTE:
it is recommended to read chapter 5.1 “tests before installation”.
3.
Add gravel for approx. 300mm (grain diameter from 8mm to 20mm approx.), make sure to vibrate and to
compact it accurately to avoid any future ground settling
(PIC. 2)
.
4.
Lay the metallic pit equipped with counterframe and brackets, paying attention to:
• Arrange the pits according to the transit direction as indicated on the counterframe
(PIC. 5)
.
• Check that the pits are correctly plumbed
(PIC. 2)
.
• Ensure that the counterframe is 10mm higher than walking level (in order to limit rainwater infiltrations into the
pit). To arrange the pit at the suitable height, add or remove gravel under the pit
(PIC. 3)
.
5.
In case of installation with multiple pits, ensure that they are all well alligned and oriented in the same direction
(PIC. 6)
.
6.
Add gravel all around the pit for about 200mm to avoid any obstruction of the drainage holes, placed at the
bottom of the pit, during the concrete casting.
7.
Lay a flexible sheath of 50mm diameter from each pit to the control unit for the electrical connection of the
bollards
(PIC. 2 and 4
).
WARNING!
If the distance between pits and control unit is more than 10m, purchase the bollards equipped
with electrical connection lines of the suitable length (standard length 10m – optional: up to 80m).
8.
In case an “immersion pump” is needed (as described in chapter 5.2), lay a 50mm diameter sheath from the “pit
for rainwater collection” to the control unit and connect the drainage pipe to the sewer system or similar. Take
into account the installation of a non-return valve or similar, to avoid any flow back into the pit.
9.
Arrange correctly the brackets supplied with the pits
(PIC. 4)
.
10.
Cast concrete all around the pits until 100mm under the walking level (evaluate this quota according to the type
of road surface).
NOTE:
it is recommended to cast concrete in two steps to avoid the lifting of the pits due to flotation in liquid
concrete. It is also recommended to vibrate the concrete to compact it properly.
11.
Lay any additional pipe from the control unit to the installation point of the accessories (i.e. inductive loops, traffic
lights, consolle, etc.). Prearrange the electrical connection and the earthing to the control unit.
12.
Once the concrete has solified, carry out the road surface finish.
All the pipelines shall be laid in full compliance with the regulations in force.
5.3 - LAYING OF THE PIT
UK
