Efficient Dispersant Solution for Shield Tunneling Clay | Chemi Tech Professional Slurry Modifier

In shield tunneling through complex strata, high-plasticity clay layers present persistent challenges. Issues such as cutterhead clogging, muck discharge pipe blockages, unstable chamber pressure, and plummeting advance rates not only severely delay project timelines but also significantly increase equipment wear and construction risks. Traditional methods like water or generic additives often offer only temporary relief, failing to fundamentally alter the agglomerated state of clay particles.

Addressing these market pain points, Chemi Tech leverages profound chemical R&D capabilities to offer a series of high-efficiency clay dispersants for shield tunneling. The core of our solution lies in the unique molecular design that effectively wets, penetrates, and disperses clay particles, breaking down their network structure. This significantly reduces the slurry's viscosity and yield stress, leading to a fundamental improvement in its flowability.

Our professional solution follows a clear procedure: First, our technical team conducts an in-depth analysis of the project's geological report and construction parameters to assess clay characteristics. Second, through laboratory tests, we accurately match and recommend the most suitable dispersant type and initial dosage. Subsequently, we provide detailed on-site dosing plans and operational guidelines to ensure thorough mixing of the agent with the soil. Finally, we implement dynamic monitoring and parameter optimization during construction to ensure consistent and stable slurry performance.

In a metro tunnel project in Eastern China, the contractor faced severe cutterhead clogging and screw conveyor spewing while traversing a thick layer of soft plastic clay, with daily advance rates less than half of the designed value. After applying Chemi Tech's customized dispersant, the slurry's muck-carrying capacity and flowability improved markedly. Cutterhead cake formation was virtually eliminated, and the muck discharge system returned to smooth operation. Ultimately, the average advance rate in this section increased by approximately 60%, effectively protecting the TBM's cutterhead and tools, earning high recognition from the contractor.

Choosing Chemi Tech means selecting not just a product, but a reliable technical support system. We are committed to providing robust chemical solutions for every challenging drive, assisting projects to breakthrough clay barriers and advance steadily.