Abstract:

Addressing the current issues of poor resource utilization of waste fibers and ineffective vacuum preloading reinforcement for dredger fill, we developed a modified fiber plastic drainage plate based on the modification treatment of waste fibers. Using gradient ratio tests and indoor vacuum preloading model tests, we compared and analyzed the clogging characteristics of various modified fiber filter membranes, as well as the effects and patterns of vacuum preloading using different types of drainage plates on soft soils. The results show that the anti-clogging effect of the modified fiber filter membrane with a pore size of more than 119 µm is better. The modified fiber drainage plate is superior to the ordinary split-type plastic drainage plate in terms of settlement, water output, vacuum degree, pore water pressure, soil moisture content, and vane shear strength. The drainage plate with a filter membrane pore size of 119 µm exhibits the best reinforcement effect. Compared to the ordinary split-type plastic drainage plate, it has a lower cost, reduces moisture content by an average of 6.4%, and increases vane shear strength by an average of 7.8 kPa. This fully demonstrates that the modified fiber drainage plate not only provides excellent reinforcement in engineering applications but also reduces costs, aligning with the national goals for infrastructure construction and economic green sustainable development.

Key words: modified fiber drainage plate, vacuum preloading, soft dredging soil, gradient ratio, congestion