地盤

道の駅の地盤調査の速報が入っていくるが、表土３０センチから下は玄武岩でN値５０。建築人生長いがこんな硬い地盤を見たのは初めてである。received a preliminary report on the ground survey of the roadside station, which showed that the ground below 30 centimeters of topsoil was basalt with an N value of 50. The first time I have seen such a hard land in my long life of architecture.