Possibility of impervious coating for the geotechnical reuse of soil and solid waste

Abstract

Impervious coating treatment is an original technology which consists of coating of soil and solid waste by particle units with an impervious coating material (a sealing material) containing water-absorbent polymers. The elution of attached substances, such as heavy metals, from the surface of soil particles is suppressed. This is because each particle is uniformly coated with the sealing material. Furthermore, because the sealing material swells, due to the absorption of pore water, and fills the void spaces of the soil and solid waste, the water interception performance of the treated soil can be expected to improve. Through laboratory experiments, this study evaluated the basic characteristics, such as the elution of heavy metals and hydraulic conductivity, of soil and solid waste that have been treated with an impervious coating in order to investigate their reutilisation.

Study on the deformation law of the construction of the cutoff wall of the reservoir

“…The widening section not only has the area covering the cutoff wall, but also requires a large amount of earth and stone filling to form an embankment. These projects and its construction process will affect the original reservoir cutoff wall not only disturbance [ [1] , [2] , [3] ], and forced to raise the original cutoff wall, and due to the increase of the backfill earthwork quantity is larger, and on both sides of the backfill section has a big difference, add high cutoff wall and backfill construction process will have significant influence on the lower original plastic concrete wall [ [4] , [5] , [6] ]. At the same time, because the original cutoff wall is plastic concrete wall, its strength and deformation performance are low [ 7 ].…”

Numerical Analysis for Ground Subsidence Caused by Extraction Holes of Removed Piles

“…Previous studies have shown that ground subsidence can be prevented and that the impact of ground subsidence can be lessened by injecting a filler into the extraction holes of removed piles. In addition, it is considered desirable for the filler that is injected into the extraction holes of removed piles to aid in the development of strength so that local subsidence does not occur in the area around the filled holes [15][16][17]. Furthermore, it has also been clarified that the strength of the filler can be developed sooner by mixing sodium carbonate into it [15][16][17].…”

“…In addition, it is considered desirable for the filler that is injected into the extraction holes of removed piles to aid in the development of strength so that local subsidence does not occur in the area around the filled holes [15][16][17]. Furthermore, it has also been clarified that the strength of the filler can be developed sooner by mixing sodium carbonate into it [15][16][17].…”