Efficient Defoamer Solution for Tunnel Shield Boring - Chemi Tech Tackles Slurry Foam Challenges

In tunnel shield construction, excessive foam generation in the slurry system is a common and challenging issue. Foam reduces slurry density and cutting transport capacity, leading to unstable tunneling parameters for the shield machine. In severe cases, it may cause pressure imbalance in the chamber, poor muck discharge, and even ground settlement risks. Traditional methods often have limited effectiveness or introduce secondary problems.

Chemi Tech specializes in the field of engineering materials. To address the foam pain points in shield construction, we have developed high-performance defoamers specifically for shield tunneling. Our solution is based on in-depth research into slurry composition and foaming mechanisms. The products feature rapid foam breaking and long-lasting foam suppression, with good compatibility to the slurry system without affecting its core performance.

Our specific solution steps are as follows: First, our technical team conducts on-site surveys to analyze slurry composition, foam characteristics, and construction conditions. Second, based on the analysis results, we recommend the matching defoamer type and initial dosage ratio. Then, we guide clients to add the defoamer at the appropriate point in the slurry circulation system, typically where foam initially generates for optimal effect. Finally, we continuously monitor the foam control effectiveness and fine-tune the dosage according to changes in the ground being excavated, ensuring stable foam suppression throughout the process.

We have served a metro extension tunnel project in a city. When tunneling through a water-rich sandy stratum, the project experienced a dramatic increase in slurry foam, severely impacting advance rates and segment installation quality. After applying Chemi Tech's defoamer, foam was significantly suppressed in a short time, slurry performance stabilized, and the shield machine resumed advancing with preset parameters. This ensured the successful breakthrough of the tunnel section, and the contractor highly recognized the processing efficiency and results.

Choosing Chemi Tech means opting for a reliable and professional auxiliary support for shield construction. Our products and technology aim to help contractors overcome foam obstacles, ensuring the efficient and smooth operation of shield machines, and safeguarding tunnel projects.