サンドイッチクッション材を用いた荷重軽減の野外実験 A Field Test on the Use of Sandwiched Cushion for Load Reduction
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A field test was conducted on a rigid retaining wall with sandy backfill sandwiching compressible layer of varied EPS (Expanded Polystyrene) thickness. Highly granular and permeable tire chips (obtained from shredding used car tires) were used behind the EPS as drainage enhancing element, which prevents any accumulation of water behind the EPS. The earth pressures acting against the wall were measured. From the test results, it could be confirmed that the use of EPS as compressible cushion behind a rigid structure leads to reduction of the pressure due to the controlled yielding of the wall and the backfill. As compared to the EPS alone, combined use of tire chips and the EPS yields more reduction. This implies that apart from its function as a drainage layer, tire chips also acts as a compressible agent and contributes to the reduction of pressure. The developed technique, thus, can also contribute greatly towards reducing the environmental hazard posed by the stockpiling of scrap tires.
- Proceedings of the Japan National Conference on Geotechnical Engineering
Proceedings of the Japan National Conference on Geotechnical Engineering JGS39(0), 1611-1612, 2004
The Japanese Geotechnical Society