A Study on the Reinforcement Technology for River Embankment toMaintain Performance during Earthquake

为防止河堤发生灾难性坍塌，保持河堤在地震中的使用性能，提出了相应的对策。研究了一种采用薄板结合锥形混凝土块和无纺布对河堤进行包裹加固的方法。这种薄片被称为“圆锥形无光”。另外，为减少路堤体沉降，在路堤与地基之间设置了“锥形垫层”。通过振动台试验和模型试验，阐明了锥形垫层对防止路堤塌陷和沉降的有效性。

To prevent from a catastrophic collapse of river embankment, and to maintain performance of it during earthquake, a countermeasure was developed. A reinforcement method of wrapping around river embankment by a sheet in combination with conical concrete block and non-woven fabric was studied. This sheet is called ”conical matt”. In addition, to reduce subsidence of the body of embankment, "conical matt" was laid on between embankment and foundation ground. It was clarified that the conical matt was effective for the prevention from collapse and subsidence of embankment, through theshaking table tests and the model test.