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Water

Tunnel water ingress controlLeaks and inflow stopped in tunnels, shafts and underground structures.Crack and joint injectionLeaking cracks and joints sealed, and structural cracks bonded, in concrete and masonry.Waterproofing and polyurea liningsPU membranes and polyurea linings for decks, tanks, tunnels and water structures.

Tunnels

Pre- and post-excavation groutingWater cut off and weak ground consolidated ahead of the face; voids closed behind it.Cavity and void fillingVoids above tunnel crowns, behind linings and under slabs filled without loading the support.Tunnel rehabilitationOld and operating tunnels: seepage stopped, ground consolidated and lining repaired, under traffic.

Ground

Track and slab re-levellingSettled ballastless track and slabs lifted back to level by PU injection, on live lines.Permeation and chemical groutingWeak, loose or wet ground strengthened and sealed by resins and gels that fill it without moving it.TAM groutingStaged grouting through sleeve pipes for shafts, foundations and deep excavations.Curtain and consolidation groutingSeepage cut-offs and foundation consolidation for dams, barrages, shafts and structures.Ground investigation and monitoringERT, GPR and MASW surveys, boreholes, lab tests and instruments, before and after treatment.

Rock, slopes and mines

Rock bolting and self-drilling anchorsRock bolts, self-drilling and prestressed anchors for tunnels, portals, slopes and caverns.Slope stabilisationSoil nails, anchors, mesh, drainage and rockfall barriers for slopes above roads, railways and towns.Mine shaft and strata treatmentWater sealed in shafts and declines; weak roof and face strata consolidated with resins and bolts.
All services →Grouts and resins we make →

Railways

RailwaysSettled track, transition zones and wet tunnels on running lines.

Tunnels and metro

Tunnels and metroWater, cavities and weak ground in tunnels, shafts and metro works.

Hydropower and dams

Hydropower and damsSeepage, foundations, tunnels and slopes on hydro projects.

Mining

MiningWater in shafts and declines, and weak strata at faces and in roadways.

Water, ports and highways

Water, ports and highwaysWater tunnels and shafts, micro tunnels, pipelines, manholes and highway slopes.

Heritage and buildings

Heritage and buildingsSettlement, cracks and leaks in heritage structures and buildings in use.
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Services

Tunnel water ingress controlPre- and post-excavation groutingCavity and void fillingTunnel rehabilitationTrack and slab re-levellingPermeation and chemical groutingTAM groutingCurtain and consolidation groutingRock bolting and self-drilling anchorsSlope stabilisationCrack and joint injectionWaterproofing and polyurea liningsMine shaft and strata treatmentGround investigation and monitoring

Industries

RailwaysTunnels and metroHydropower and damsMiningWater, ports and highwaysHeritage and buildings

Sales

+91 99100 18144WhatsApp +91 99100 18144connect@geoconstech.com

Water

Crack and joint injection

A crack that carries water corrodes the steel and keeps growing. We inject it from the dry side: polyurethane or acrylate gel where water is moving, epoxy where the crack must be bonded so the concrete works as one piece again.

Request a site inspection See the Parsik tunnel

When to call us

The signs

  • Leaking cracks and joints in basements, tanks, galleries and tunnels.
  • Manholes and chambers letting groundwater in or sewage out.
  • Spigot and collar joints in pipelines.
  • Structural cracks in beams, slabs, walls and bridges.
Injecting a leaking crack in a concrete wallSection through a concrete wall with wet ground behind it. Holes drilled at an angle from the dry face cross the crack inside the wall; packers in the holes carry resin into the crack, from the lowest packer up, and push the water out. WET SIDEINSIDEPUMP123456
  1. A crack through the wall carrying water from the ground behind.
  2. Holes drilled at an angle, to cross the crack inside the wall.
  3. Packers set in each hole and injected from the lowest one up.
  4. Resin fills the crack: PU or acrylate gel where water is moving, epoxy where the crack must be bonded.
  5. The resin pushes the water out of the crack ahead of it.
  6. Once the resin has cured, packers come out and the holes are sealed.
Geo Constech
Crack injection · Section
Schematic · Not to scale

How we do it

Method, step by step

  1. Inspect

    Cracks mapped, with their width, their movement and whether they carry water.

  2. Choose the resin

    PU or acrylate gel for wet or moving cracks; epoxy for dry structural cracks.

  3. Drill and set packers

    Holes at an angle to cross the crack inside the element, with packers along the crack.

  4. Inject

    From the lowest packer up, until resin shows at the next one.

  5. Finish

    Packers removed, holes sealed and the surface made good.

What we use

Made at our plant in Alwar

Polyurethane injection grouts and foams

PuTeRA

Water stopping, void filling, ground reinforcement, slab and track lifting.

Acrylate permeation gels

Teracryl

Fine soils, and wet, fine cracks.

Epoxy injection resin

Geo-EP 2422

Bonding structural cracks in concrete.

Quality

Checks and proof

  • Resin seen at the next packer before moving up.
  • Leaks re-checked after cure.
  • Cores through bonded structural cracks where the specification calls for them.

On record

Where we have done it

Railways · Tunnels · Thane–Kalyan, Maharashtra

Parsik tunnel, Thane–Kalyan

Seepage controlled in a brick-lined railway tunnel built in 1916, on a busy main line, without stopping the trains.

Certified

Questions

What clients ask

PU or epoxy?

PU for cracks that carry water or still move: it seals and stays flexible. Epoxy for dry cracks that must carry load again: it bonds. A leaking crack that also needs bonding is usually sealed first and bonded after.

Can a manhole be repaired without digging it out?

In most cases, yes. Joints and cracks are injected from inside, and the ground around a leaking chamber can be sealed by injecting through its wall.

Related services

Often used together

Waterproofing and polyurea linings

PU membranes and polyurea linings for decks, tanks, tunnels and water structures.

Tunnel water ingress control

Leaks and inflow stopped in tunnels, shafts and underground structures.

Tunnel rehabilitation

Old and operating tunnels: seepage stopped, ground consolidated and lining repaired, under traffic.

Seeing this on your site?

Send us what you see, where, and the access or traffic window. An engineer reviews it and replies with the next step.

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