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Injection and simultaneous pulling of ram injection lances
with separated tip
A special procedure is the simultaneous injection and pulling of ram injection lances when using the lost tip. DESOI supplies the complete equipment. For the injection of expanding materials, a check valve has to be used. The system is easy to handle, can be used several times (except for the tip) and the installation is done without big machines. Consequently, there is little impact on the soil and the immediate surroundings. A precise injection by volume or pressure criterion is possible. The method is used to fill cavities in the soil, to seal e. g. dams and earth walls, and to stabilise and consolidate the soil.
INJECTION
Procedure - Injection
- Place ram injection lances with lost tip
- Securing of the ground with the scraper plate and the base plate (No. 11516 / 11517 + 11518), positioning of the pneumatic pulling device
- Place the pulling head (No. 11530 / 11535) on the ram injection lance
- Screw on the bayonet plug (No. 20639-38)
- Connect the material hose (No. 13684) to the DESOI PowerInject SP-20
- Start screw pump DESOI PowerInject SP-20 (No. 13576) with material
- Interconnect the material hoses (No. 13683 + No. 13684) and connect hose (No. 13683) to the ram injection lance
- Pull the ram injection lance by approx. 3 cm using the pneumatic pulling device (No. 11525)
- Start the injection device, the lost tip is pressed out by the material pressure
- Adjust the pulling speed to the requirements
Procedure - Pulling
- When the pull-out height is reached (approx. 3 m), switch off DESOI PowerInject SP-20, close both ball valves, disconnect the material hoses
- Briefly open and close the ball valve to relieve the pressure from the material hose
- Secure the material hose with a double spring clamp
- Loosen the lance above the pulling device with two water pump pliers and turn it apart by hand
- Put down the ram injection lance (rinse if necessary), disconnect the material hose
- If necessary, inject and pull further lances or clean working material
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