During shield tunneling construction, circulating water systems under high-salinity geological conditions often generate large amounts of stubborn foam. This foam not only affects the density and cuttings-carrying capacity of the slurry, reducing excavation efficiency, but may also overflow and pollute the working environment, and even interfere with equipment monitoring systems, becoming a significant obstacle to project progress.
Traditional defoamers often quickly lose effectiveness in complex water systems with high salinity and high solid content, and cannot provide durable and stable defoaming and foam-suppressing effects. To address this common industry problem, the Chemi Tech R&D team, after in-depth technical research, developed a series of specialty defoamers tailored for high-salinity shield-tunneling water environments. The core advantage of this product series lies in its unique molecular structure design, which can maintain activity under high ionic strength environments, rapidly penetrate and destroy the foam film, and at the same time suppress the formation of new foam for a long time.
Our solution is specifically divided into three steps. The first step is on-site diagnosis and technical evaluation; our engineers will take samples to analyze the salt composition, pH value, and slurry components of the shield-tunneling water to accurately determine the causes of foaming. The second step is customized product selection and pilot testing; we match the most suitable defoamer model from our product library and conduct on-site small-scale trials to verify defoaming speed and durability. The third step is to formulate a scientific dosing plan and provide full-process technical support; based on the excavation speed and circulating water volume, we determine the optimal dosing point and dosage to ensure a consistently stable defoaming effect without affecting other properties of the slurry.
In a tunnel project crossing complex strata in East China, the construction party encountered a serious foam problem caused by high-salinity groundwater. After adopting our customized defoaming solution, the foam on the surface of the slurry tank dissipated rapidly within minutes of addition, the slurry performance returned to stability, and the excavation speed was effectively safeguarded. The foam problem throughout the construction section was fundamentally controlled, earning high recognition from the construction team.
Chemi Tech is committed to providing reliable chemical solutions for underground engineering construction. Facing the defoaming challenge of high-salinity shield-tunneling water, we help you clear construction obstacles and ensure smooth and efficient project progress with professional products and technical services.