Experimental Study on Piping of Gravel Soil under the Inhibitory Effect of Basalt Fiber
If piping cannot be restrained in time,it can cause a large amount of soil erosion and lead to embankment collapse.To study the inhibitory effect of basalt fibers during the occurrence of piping,this article conducted indoor piping tests,focusing on aspects such as pore pressure,hydraulic gradi-ent,permeability coefficient,flow velocity,and particle loss.The study examined the effects of differ-ent fiber contents and fiber lengths of basalt fibers on the suppression of piping development.The re-sults indicated that the addition of basalt fibers made the migration path of poorly graded gravel soil more tortuous and narrow,thereby inhibiting the development of piping in the entire soil.For the same content of basalt fibers,there was an optimal fiber length to suppress piping development in poorly graded gravel soil with basalt fibers.If the fiber length was too long,it increased the migration path of the soil and also made the migration channel relatively wider.Conversely,shorter fiber length made the migration channel for fine particles narrower,which was more likely to cause local blockage and further led to piping to develop from other directions,resulting in further particle loss.
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