Efficient Foam Control Solution for Tunneling: Chemi Tech's Specialized Shield Slurry Defoamer

During shield tunneling construction, the generation of persistent foam in the soil slurry is a common yet challenging issue. This foam not only reduces muck discharge efficiency and causes unstable chamber pressure but can also lead to pump cavitation, accelerated wear, and even impact the tunneling machine's advance accuracy and schedule. Traditional manual skimming or general defoaming methods often prove inadequate for a fundamental solution.

Addressing these market pain points, Chemi Tech leverages its profound expertise in specialty chemicals to introduce a professional-grade slurry defoamer specifically designed for tunneling applications. Our solution is based on an in-depth analysis of the shield slurry system (including soil type, additives, water conditions, etc.). The product features rapid penetration and long-lasting foam suppression, quickly breaking down foam film structure and preventing re-foaming, thereby ensuring stable operation of the construction system.

The specific solution involves three key steps. Step one is on-site diagnosis and sample analysis, where our technical engineers conduct field visits or analyze provided slurry samples to identify the cause and composition of the foam. Step two is customized product selection and formula fine-tuning. We offer multiple defoamer models to adapt to different geological conditions and foam severity, ensuring optimal performance matching. Step three is on-site application guidance and effect tracking. We provide clear recommendations on addition points, dilution ratios, and dosage, followed by continuous monitoring to ensure long-term control of the problem.

In a city tunnel construction project in Eastern China, the contractor faced severe slurry foaming due to complex soil layers, significantly hindering the screw conveyor's muck discharge efficiency. After applying the customized defoamer supplied by Chemi Tech, foam was markedly suppressed within minutes of addition. Slurry fluidity improved, and the shield machine's chamber pressure stabilized. The average daily advance rate increased by approximately 15%. Project management reported that the defoamer effectively reduced equipment maintenance frequency, providing strong support for the project's timely completion.

Choosing Chemi Tech means opting for an efficient, professional, and reliable auxiliary solution for tunneling construction. We are committed to helping clients overcome foam-related obstacles through innovative chemicals and technical services, enhancing overall project efficiency and profitability.