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TECHNOLOGY

Continuous Steel Pipe Reinforcement Grouting Methods

Continuous Steel Reinforcement Grouting Process Overview

A method of increasing the strength of the original ground, blocking the inflow of groundwater,
and distributing and reducing the dead load and earth pressure on the tunnel
by installing processed steel pipes in an appropriate shape before tunnel excavation and injecting grout
into the surrounding ground in multiple stages using continuous packers on the inside of the steel pipes.
1

Structural and Compensatory Safeguards

2

Apply Effects

  • •

    Geotechnical reinforcement and differential effects of injectables

  • •

    Beam Arching Effect by Reinforcement (Steel Pipe)

  • •

    Topsoil pressure relief

  • •

    Reduced relaxation zone

  • •

    Preventing surface subsidence and heave

  • •

    Displacement suppression effect on sidewalls

3

Excellence in construction

4

Coverage

5

Method Features

How to apply traditional methods How the patent method works
Method Features

How we staff

  • - Tight caulking is not possible
  • - Reduced confidence in the quality of groundwater outfalls
  • - Deformation of the surrounding ground due to opening expansion during drilling
  • - Payments are expensive
  • - Caulk: Ceromax Cx-1

Adopt packer-based injection

  • - Caulking of perforated walls with dense and firm adhesion
  • - Excellent constructability of groundwater outlet
  • - Excellent economic efficiency and quality reliability
  • - Caulking Agent: LW Injection
Sealing

Separate pouring before grouting

  • - Install the inlet and outlet hoses
  • - Uneven injection due to strength differences

Co-Injection with External Packers

  • - External packer installation prevents backflow of injectables
  • - Pre-filling of external packer prevents backflow when grouting
  • - No sealing required
Spacers

Attaching Spacers to Steel Pipe

  • - Steel pipe gravity pushes against the bottom of the borehole, reducing injection effectiveness
  • - Outer packer reinforcement is centered in the perforation hole due to filling agent
Non-Return Valves

Rubber banding the injection holes

  • - Lack of elasticity
  • - Possible breakage when inserting reinforcement (reducing injection effectiveness)

Installing an Injection Hole Non-Return Valve

  • - Fill hole and non-return valve installed, no valve in outer packer section (prefill in packer)
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