In tunnel shield construction, the stability and efficiency of the slurry system is one of the key factors determining project progress and cost. Construction teams often face a series of challenges such as excessively high slurry viscosity, poor flowability, the tendency to form hard mud cakes on the cutterhead and inside the soil chamber, and the resulting increase in cutterhead torque, decline in excavation speed, and worsening equipment wear. These problems not only slow the schedule but also significantly increase equipment maintenance costs and construction risks.
In response to these market pain points, drawing on deep accumulation in materials science, Chemi Tech has developed a series of high-performance dispersants designed specifically for tunnel shield working conditions. Our solution does not simply provide a product; it builds systematic application steps around the specific problem.
First, our technical team will thoroughly analyze the engineering geological conditions, the characteristics of the bentonite or soil used, and the existing slurry formulation to precisely locate the root cause of the problem. Then, we recommend the appropriate Chemi Tech shield dispersant model, which can effectively break down the agglomerated structure of clay particles in the slurry, release the entrapped free water, and significantly reduce the slurry's yield stress and viscosity.
During application, we guide the customer through scientific dosing and mixing procedures to ensure the dispersant acts evenly throughout the entire slurry system. The result is a fundamental improvement in the slurry's rheological properties: flowability increases substantially, mud cake formation is effectively prevented, and the soil and sand cut by the cutterhead are discharged smoothly. This directly reduces cutterhead drive torque and wear, ensures smooth and rapid excavation of the shield machine in complex strata, and at the same time reduces the difficulty of slurry discharge and treatment.
We once served a municipal rail transit tunnel project. While crossing clay-rich strata, the project encountered severe slurry thickening and cutterhead mud caking, and excavation efficiency dropped sharply. After adopting Chemi Tech's customized dispersant solution, the slurry performance stabilized within a short time, mud caking on the cutterhead was basically eliminated, the average excavation speed returned to the expected level, the equipment operating load dropped significantly, and the project proceeded smoothly.
Chemi Tech is committed to clearing slurry obstacles for tunnel shield projects with innovative chemical solutions. What we provide is not only high-quality dispersant products, but also full-process professional services from diagnosis and testing to on-site support, helping customers improve construction efficiency, ensure engineering safety, and control overall costs.