タイヤチップスドレーンによる砂地盤の液状化後変状低減(<小特集テーマ>都市における地盤工学的問題: 都市の防災と環境)

概要

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The effects of gravel drains on the mitigation of earthquake-induced lateral flow deformation of saturated Toyoura sand were investigated in 1g laboratory model tests. Earthquake-induced dynamic loading was simulated by using lateral impact loads generated by a pendulum typehammer on the side of the testing equipment. An emphasis was placed on the applicability of a recycled material, tyre-chips, instead of gravel, to accelerating the drainage in sand deposits. The results of the model tests showed that the tyre-chip drain exhibited almost the same effects as conventional gravel drains and in particular : (1) a tyre-chip drain installed in an inclined slope of medium dense sand reduced the excess pore pressure generation, and subsequent lateral flow deformation and post-cyclic settlement and (2) even if liquefaction occurred in sand deposits with tyre-chip drains, the lateral deformations and vertical settlements were reduced.
社団法人地盤工学会の論文
2005-09-01