Instructions for installing RoDrive
RoDrive tanks are designed for underground installation and are suitable for various purposes and applications. They can be used as fire water tanks, containments, water reservoirs and more. They are characterized by excellent statics, which enable the tank to be installed under the driving surfaces up to load class C250. The free-standing installation of the collector is not allowed.
When installing collectors, it is necessary to follow the manufacturer's instructions and installation. In cases where simple and independent installation could not be consulted with the manufacturer. Landslides and floods and other difficult terrains require the advice of an experienced expert. We also offer advice and presence during the excavation, which enables you to install the product correctly and with high quality. If a drawing of installation and burial of a specific project is required, contact the ROTO technical team.
For warranty claim cases in the event of damage to the tank, the entire installation must be documented with photographic installation procedures.
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Step 1: EXCAVATION OF THE CONSTRUCTION PIT
The floor plan size of the construction pit must be 1 m larger than the dimensions of the collector. If the type of terrain allows, we dig a construction pit with as vertical walls as possible. It is necessary to take into account the slope angle of the soil α and measures for safe work. The depth of the construction pit must be coordinated with the projects and dimensions of the tank. For the appropriate size of the construction pit (see Table 1).
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Step 2: EARTH COMPRESSION
Before installing the collector, we must carefully examine the composition and characteristics of the soil. The floor of the construction pit must be level, hardened and stable. If the soil is less load-bearing, it is necessary to make a remedial cushion with a thickness of 60 cm. The rehabilitation cushion must be compressed to a compaction of 60 MPa.
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Step 3: CONSTRUCTION OF SAND BED
The walls of the construction pit must be protected with construction felt or geotextiles.
A bed of sand (sand 0 - 4 mm) with a thickness of 10 to 15 cm is placed on the hardened (compressed) floor of the construction pit. The use of frozen material is prohibited.
In the presence of groundwater, a reinforced concrete slab d=20 cm with C20/25 concrete should be made at the bottom of the construction pit. For more detailed instructions, see the chapter: "Installations with groundwater" on page 8.
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Step 4: RODRIVE TANK INSTALLATION
Installation of the RoDrive tank is carried out in accordance with the instructions: "Transport, unloading and storage" on page 1. (see Figure)
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Step 5: IMPLEMENTATION OF CONNECTIONS AND CONNECTIONS
After installing the tank in the construction pit, the tank, if only this part of the system needs to be connected to the previously prepared connections.
When making connections (such as a parallel or series flange connection), it is recommended that the connection be waterproofed.
The watertightness test of the connector should be carried out by filling the tank up to a third of its height with clean water and leaving it to rest for a minimum of 24 hours.
To detect a possible spill, it is necessary:
- Measure the water level in the tank and compare it with the value from the next day
- Check the dryness of the backfill material above the connections made and compare it with the dryness in the next 24 hours.
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Step 6: BACKFILL WITH APPROPRIATE GRANULATION
The burial of the tank must be filled up to the height of the top of the tank with round-grained or crushed material with a granulation of 4 to 8 mm.
When backfilling with backfill material, the tank must be filled with clean water on the fly. It is recommended that the tank be filled and backfilled in thirds.
The entire backfilling process must be started by filling water up to 1/3 of the height of the tank, and then continue by backfilling the construction pit with backfill material of 4 to 8 mm.
*Filling of the tank in thirds is done in thirds to equalize the tension on the walls of the tank from both sides.
It is important to pay special attention to filling the ribs under the tank as much as possible, so in the construction pit it is necessary to manually fix the backfill material and push it into the parts that the material itself cannot reach.
If there are gravity connections on the tank, which cannot be connected at the moment, it is necessary to plug the connections with suitable plugs that can withstand such volume and pressures.
Fill the collector with 4 - 8 mm backfill material up to the height of the top of the tank.
Before proceeding with burial, protect the layer of backfill material from material mixing by installing geotextile or construction felt with a weight of 200 g/m2, over the entire surface of the construction pit. (See Figure 8 on next page)
We install additional risers on the collector (the minimum height of only these during installation is 100 cm).
- DN 800 opening DN 600 [7600059030]
Needs for increases above the reservoir must be coordinated before or when ordering.
To backfill the collector above the roof, it will be necessary to create a layer of frost-resistant material with gravel or a mixture of gravel and crushed stone with a granulation of 0 - 64 mm. This layer is made in a thickness of 50 cm. (See Figure 9 and Figure 10)
* before backfilling with the above material, it is important to lay geotextile or construction felt of grammage 200 g/m2 to prevent the material from being washed away.
Backfill material with a granulation of 0 to 64 mm plays a key role in the transfer of forces and relief of the reservoir.
The next backfill layer will be frost-resistant material with gravel or a mixture of gravel and crushed stone with a granulation of 0 - 32 mm, which is also produced in a thickness of 50 cm.
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Step 7: COMPRESSION
Bulk material 0 – 32 mm is with a manual vibratory plate or a roller up to max. weighing 12.5 t must be hardened and prepared for the production of the final layer.
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Step 8: CONSTRUCTION OF CAST IRON COVERS
Due to the tank's exposure to heavy traffic loads, polyethylene covers on the tanks are not suitable. For installation in driving surfaces, it is necessary to install a cast iron cover with a frame and a reinforced concrete ring.
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Step 9: PRODUCTION OF THE FINAL LAYER - ASPHALT
Adequately and in accordance with the instructions for installing the RoDrive tank, an asphalt finishing layer can be applied over the tank, and the tank is exposed to load class C250 or 25 tons axle load.
It is recommended that when the asphalt is installed, a supporting layer of asphalt with a thickness of 6-8 cm is made, depending on the axle crossings or the load on the roadway.
And a wear layer 3-4 cm thick, depending on the traffic density.
