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ground injection with ram injection lances
Steel tubes with tips and lateral discharge ports are rammed into the ground. Adapted extension tubes with or without discharge ports are available. This method is most suitable for low depths and easily penetrable grounds. The maximum setting depth depends on the ground conditions. Setting depths down to 15 m can be realised. The injection material flows into the ground through all discharge ports. On application of the separated tip the filling material flows out at the end of the lance. For injections below base plates they have to be pre-drilled accordingly. For sealing, injection packers with a connection sleeve are used.
Ram injection lances can be individually combined according to the injection depth
With ram injection lances Ø 21.3 mm, there is no annular gap on the outside diameter during ramming, thus no uncontrolled leakage of injection material
Easy to handle, no need of big machines
Application
Determine the remedial action together with a planning specialist, a geotechnician etc.
Mark the grid according to the developed concept
Drive the ram injection lance down to the determined depth
Mount connecting system to the ram injection lance
Connect material hose and inject the injection material
Remove connecting system after the injection has been finished
For injections under base plates
Mark the grid according to the remediation concept on the base plate and drill holes
Ram the ram injection lances with the ramming attachment and ramming hammer into the planned depth
Mount and clamp the steel packer on the ram injection lances
Connect material hose and inject injection
Remove ram injection lances after completion of injection work
Seal boreholes with a blind packer
Aim
Filling of cavities and clefts
Increasing the bearing capacity of the building ground
Examples of applications
Subsoil reinforcement for existing buildings, drinking water tanks and similar facilities
Closing gaps and cracks in the building ground, for near-surface, underground construction measures
Information
In Germany injections into the building ground need the approval of the „Lower Water Authority“. Make sure to observe the relevant national regulations and laws prior to starting the sealing measures.
Ram injection lance G ¼''
Ram injection lance with coupling sleeve and outlet openings lateral
Ram the ram injection lance to the desired depth, the lance combination with and without holes allows
injection over the complete perforated area, e.g. 5 meter long lance, the lower 3 meters are with outlet
openings lateral and are injected
Information
The coupling sleeves of the ¼'' ram injection lances have a diameter of 16 mm.
Material to be used
Mineral materials
PU and silicate resins
Acrylate gels
Foaming or expanding filling material(exclusively with Check valve)
Ram injection lance with coupling sleeve and outlet openings covered and lateral
These ram injection lances have the same application as the ram injection lance 4 with the advantage
that no impurities can penetrate through the covered outlet openings during ramming. This variant is
particularly suitable for sandy soil and when crossing water-bearing layers.
Advantages/Information
No entry of foreign material due to cover
Applicable in loose, sandy soil
High injection safety
Material to be used
PU and silicate resins
Acrylate gels
Foaming or expanding filling material(exclusively with Check valve)
Ram injection lance with separated tip material outflow below
Ram the injection ram lance to the desired depth and remove the lance approx. 10 cm, so that the tip
can be separated from the lance. Start injection, if necessary, remove lance again and inject in another
level.
Material to be used
Mineral filling material
PU and silicate resins
Acrylate gels
Ground injection with the ram- and injection head
The Ram- and injection head is used in conjunction with the G ¼" ram injection lance in slightly sandy soils for the purpose of sealing or consolidation. An enormous advantage of the Ram- and injection head is the possibility of „flushing in“ during the ram injection process. In this way, the exit holes do not become clogged with the fine sand.
Advantage
Flushing possible during the ramming process
Material to be used
Acrylic resin
Ultrafine cement
Work process
Connect ram lance with Ram- and injection head
Mount GEKA coupling
Position the ram lance
Connect water until it emerges from transverse holes
Continue purging during ramming to the desired depth (depths of up to 3m)
Connect the injection connection to material delivery line
Inject
After the injection process, pull the ram lance with Ram- and injection head out of the ground and clean it
Ram injection lances G ½''
Ram injection lance with separated tip - material outflow below
Drive the injection ram lance down to the desired depth and remove the lance
approx. 10 cm, so that the tip can be separated from the lance. Start injection,
if necessary, remove lance again and inject in another level.
Material to be used
Foaming or expanding filling material(exclusively with Check valve)
Tip with inner tube valve and 4 bores 90° displaced to each other
Drive the ram injection lance down to the desired depth. Start injection, if
necessary, remove lance and inject in different areas.
Advantages and benefits
Injection step by step
Well-directed injection in a defined depth
Material to be used
Mineral filling material
PU and silicate resins
Acrylate gels
Ram injection lance with outlet openings lateral
Drive the ram injection lance down to the desired depth, injection is possible
over the complete perforated area because of the lance combination with and
without outlet openings e. g. 5 meter long lance, the lower 3 meters are with outlet
openings lateral and are injected.
Material to be used
Mineral filling material
PU and silicate resins
Acrylate gels
Foaming or expanding filling material(exclusively with Check valve)
Ram injection lance without outlet openings lateral
These ram injection lances have the same application as the ram injection lances. Advantage of these is that they prevent the penetration of impurities. This version is especially suitable for sandy soil and by crossing the water bearing stratas.
Advantages/Information
No entry of foreign material
Applicable in sandy soil
High injection safety
Material to be used
PU and silicate resins
Acrylate gels
Foaming or expanding filling material(exclusively with Check valve)
Ramming method for Ø 10 + Ø 13 mm
Screw the ramming tool onto the ram injection lance
Ram the ram injection lance into the subsoil with the electric pile hammer incl. mounting tool and ramming tool
Loosen the ramming tool with the cordless screwdriver left-turning
Screw on the connecting sleeve, the next connecting piece, the ramming tool with 2 turns and tighten the whole ram injection lance with the cordless screwdriver (complete screw travel 40 mm)
Drive the ram injection lance with the pile hammer incl. mouting tool and the ramming tool further into the ground
Repeat point 3 – 5 up to the desired depth
Ram injection lance G ½'' (Ø 21,3 mm) with mini inflatable packer
Ram injection lance without outlet openings lateral
Drive the ram injection lances to the desired depth, no impurities can penetrate through the covered
outlet holes during ramming. This version is especially suitable for sandy soil and by crossing the water
bearing stratas.
Material to be used
PU and silicate resins
Acrylate gels
Advantages/Information
No entry of foreign material
Applicable in sandy soil
High injection safety
Workflow - Mini inflatable packer
Insert the mini inflatable packer into the ram injection lance and push it to the desired position
Mount the filling and venting unit
Start injection process, the inflation hose of the mini inflatable packer is filled with injection material and is thus tensioned. When the injection pressure of approx. 14 bar is reached, the check valve opens and the filling material enters the soil.
The pressure has to be limited to 25 bar before starting the injection, otherwise there is a risk that the inflatable packer damages and further work is no longer possible
The injection is completed when the required injection quantity or injection pressure is reached
Release mini inflatable packer by releasing the injection pressure, pull it to next position and repeat injection
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