In shield tunneling through complex strata, soil sticking to the cutterhead, forming mud cakes, and poor muck discharge are common and troublesome problems. These issues not only cause a sharp drop in excavation efficiency and aggravated equipment wear, but may also trigger the risk of shutdown, directly affecting project schedule and cost control. Traditional treatment methods are often limited in effect or high in cost, and the market urgently needs an efficient, stable and economical professional solution.
Chemi Tech has an in-depth insight into the pain points of the industry and, relying on its technical accumulation in the field of specialty chemicals, has successfully developed a series of tacky-soil dispersants dedicated to shield tunneling. The core of our product lies in its unique molecular structure design, which can effectively penetrate and coat the surface of soil particles and significantly reduce the adhesion force and internal friction between particles, thereby fundamentally inhibiting adhesion and the formation of mud cakes.
Our solution is not the delivery of a single product, but a complete customized service system. First, our technical team conducts on-site surveys or analyzes engineering geological reports to clarify the soil properties of the stratum and the construction difficulties. Second, targeted formulation simulation and performance testing are carried out in the laboratory to screen the optimal product model and dosage ratio. Third, a detailed on-site dosing plan is drawn up, including injection points, flow control and recommendations for coordinated use with the existing foam system. Fourth, our engineers are dispatched to provide on-site guidance and parameter tuning to ensure the product delivers its best performance. Finally, full-process follow-up service is provided, dynamically adjusting the plan according to excavation data and muck discharge conditions.
In an urban rail transit tunnel project in East China, the contractor encountered a serious cutterhead mud-caking problem when crossing a composite stratum rich in clay minerals, and on average had to stop every 20 rings for manual cleaning, causing serious schedule delays. After introducing Chemi Tech's tacky-soil dispersant, our technical team quickly determined a dedicated formulation based on rock samples. After injection according to the established plan, the adhesion on the cutterhead and in the soil chamber was significantly improved, the mud cakes were basically eliminated, and the continuous excavation capacity was raised to more than 80 rings without shutdown for cleaning; the smoothness of muck discharge was greatly improved, effectively safeguarding the project's key milestone schedule.
Choosing Chemi Tech means you gain not only an efficient dispersant, but also a partner dedicated to improving the smoothness and economy of your shield tunneling construction. With professional technology and hands-on service, our technical team helps you overcome stratum challenges and ensures efficient and stable progress of the project.