Introduction
Tube-à-Manchette (TAM) grouting is widely applied in projects requiring effective seepage control and improvement of soil or rock strength, particularly in complex ground conditions. Through controlled, repeatable grout injections, TAM grouting provides targeted ground treatment with minimal disturbance. This article presents representative case studies demonstrating its effectiveness.
Case Study 1: Seepage Control beneath a Deep Basement Excavation
Project Description:
A multi-level basement project in an urban area with sandy soil and a high groundwater table.
Challenges:
Continuous groundwater inflow
Risk of base heave and piping
TAM Grouting Solution:
Installation of TAM pipes below excavation level
Injection of microfine cement grout in stages
Creation of a grout curtain beneath the base
Performance Outcome:
Significant reduction in seepage
Stable excavation conditions
Reduced dependence on dewatering systems
Case Study 2: Strength Enhancement in Soft Clay Foundations
Project Description:
An industrial building founded on soft clay with low bearing capacity.
Challenges:
Excessive settlement risk
Low shear strength
TAM Grouting Solution:
Stage-wise permeation grouting using cement–bentonite mix
Controlled pressure to avoid ground heave
Performance Outcome:
Improved bearing capacity
Reduced post-construction settlement
Enhanced foundation performance
Case Study 3: Stabilization of Fractured Rock in Tunnel Construction
Project Description:
A transportation tunnel passing through jointed and fractured rock with water-bearing fissures.
Challenges:
Water ingress at tunnel face
Instability of rock mass
TAM Grouting Solution:
Pre-grouting using microfine cement grout
Multiple injections through TAM pipes installed ahead of excavation
Performance Outcome:
Reduced water inflow
Improved rock mass integrity
Safer and faster tunneling progress
Case Study 4: Rehabilitation of Settled Foundations
Project Description:
An existing structure experiencing differential settlement due to weak subsoil.
Challenges:
Structural distress and cracking
Limited access for repair works
TAM Grouting Solution:
Installation of TAM pipes adjacent to foundations
Repeated low-pressure injections to densify soil
Performance Outcome:
Arrested settlement
Improved load distribution
Extended service life of the structure
Case Study 5: Seepage Control in Dam Foundation Treatment
Project Description:
An earth dam foundation with permeable alluvial deposits.
Challenges:
High seepage through foundation
Risk of internal erosion
TAM Grouting Solution:
Construction of a grout curtain using TAM grouting
Sequential injection with cement-based grouts
Performance Outcome:
Substantial reduction in seepage
Enhanced foundation stability
Improved dam safety
Key Lessons from Case Studies
Controlled injection ensures targeted improvement
Repeatable grouting enhances uniformity
Effective in both soil and rock environments
Minimizes environmental and structural disturbance
Conclusion
Case studies confirm that TAM grouting is a reliable and versatile technique for seepage control and strength enhancement. Its ability to deliver precise, repeatable grout injections makes it particularly effective in complex geotechnical conditions, underground works, and foundation rehabilitation projects. When properly designed and monitored, TAM grouting significantly improves ground performance and project safety.
