In shield tunnel construction, the challenges brought by clay-rich strata should not be underestimated. Large amounts of clay easily adhere to the cutterhead and the inner walls of the soil chamber, forming hard "mud cakes". This worsens cutter wear, causes abnormal excavation parameters, and clogs the muck discharge system, seriously slowing project progress and bringing equipment loss and safety risks.
The market pain point is clear: how to effectively suppress clay adhesion, maintain the rheological stability of the slurry, and ensure smooth discharge of excavated soil has become the key to improving shield tunneling efficiency.
In response to this core need, drawing on years of technical accumulation, Chemi Tech has developed a series of high-efficiency shield tunneling clay dispersants. Our solution is not simple lubrication; rather, it is based on a deep understanding of clay mineral structure and achieves precise intervention through dedicated chemical molecular design.
The specific solution steps are clear: first, our dispersant can quickly penetrate between the clay particle layers and weaken their mutual attraction. Second, the active ingredients form stable steric hindrance or electrical double-layer repulsion on the clay surface, preventing the particles from re-agglomerating. Finally, the clay that would otherwise cake easily is kept in a uniformly dispersed state within the slurry system, and flowability improves significantly, thereby fundamentally preventing mud cake formation and ensuring that excavated soil is discharged through the screw conveyor or slurry pipeline at an ideal consistency.
Practice confirms the results. In a municipal rail transit tunnel project, when excavating into a high-pressure clay stratum, the cutterhead torque kept rising and soil discharge became difficult. The project team introduced Chemi Tech's clay dispersant solution, adding it to the shield slurry system at the recommended dosage. After application, mud cake formation on the cutterhead was effectively controlled, the torque value returned to a stable level, soil discharge efficiency increased by about 40%, and the shield machine was able to resume smooth, rapid excavation, providing strong support for the project to break through on schedule.
Choosing Chemi Tech means choosing a targeted technical solution and reliable product support. We are committed to providing efficient chemical additive solutions for shield tunneling in various complex strata, helping projects reduce costs and increase efficiency while smoothly navigating geological challenges.