Ground
TAM grouting
A tube-à-manchette is a sleeve pipe with rubber-sleeved ports at fixed intervals. A double packer isolates one port at a time, so grout goes into the ground exactly where it is needed, in stages, and can be repeated at the same level until the ground is closed.
When to call us
The signs
- Water cut-off and strengthening around shafts and deep excavations.
- Ground improvement under foundations, taxiways and structures.
- Layered ground, where each layer needs its own grout or pressure.
- Treated blocks at tunnel eyes and break-ins.
- 1Note 1: Borehole with a sleeve pipe, the tube-à-manchette.
- 2Note 2: Sheath grout seals the annulus between the pipe and the ground.
- 3Note 3: Rubber sleeves at fixed intervals: each one is an injection port.
- 4Note 4: A double packer isolates one sleeve at a time.
- 5Note 5: Grout enters the ground at that level only.
- 6Note 6: Stages are repeated, and re-grouted where the take shows a need, until the block is closed.
- 7Note 7: Pressure and volume logged for every stage.
How we do it
Method, step by step
Drill and install
Holes drilled, sleeve pipes installed and the annulus sealed with sheath grout.
Set the stages
Order, grout and pressure for each port set in the design, with primary and secondary holes.
Inject port by port
A double packer at each sleeve; the grout enters the ground at that level only.
Repeat where needed
The same port can be grouted again where the take shows a need.
Record and verify
Pressure, volume and refusal recorded for every stage; permeability or strength tested against the acceptance value.
What we use
Made at our plant in Alwar
GeoFine (aqueonglobal.com, opens in a new tab)
Rock and soil injection where a cementitious grout is specified.
PuTeRA (aqueonglobal.com, opens in a new tab)
Water stopping, void filling, ground reinforcement, slab and track lifting.
DrucHyd 2C (aqueonglobal.com, opens in a new tab)
Curtain grouting against active inflow; waterproofing and consolidation under water pressure.
Teracryl (aqueonglobal.com, opens in a new tab)
Fine soils, and wet, fine cracks.
Quality
Checks and proof
- Sheath grout set before the first stage is injected.
- Pressure, volume and refusal for every port, on a stage log.
- Permeability or strength tests in the treated block.
On record
References
TAM grouting references, including work in progress, are available on request.
Questions
What clients ask
When is TAM grouting better than injecting through a simple pipe?
When the ground is layered or the treatment may need repeating. Each sleeve is a separate port at a known depth, so the grout, the pressure and the quantity can be set level by level, and a level can be grouted again.
Can different grouts go into the same hole?
Yes. A common sequence is a cement or microfine cement grout first, to fill the coarser voids, then a resin or gel for the finer pores.
Related services
Often used together
Permeation and chemical grouting
Weak, loose or wet ground strengthened and sealed by resins and gels that fill it without moving it.
Curtain and consolidation grouting
Seepage cut-offs and foundation consolidation for dams, barrages, shafts and structures.
Tunnel water ingress control
Leaks and inflow stopped in tunnels, shafts and underground structures.
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