Reflecting plates (13) are driven in from the vicinity of the upper surface of a subsurface layer (3) to the depth of the lower end of a footing (5) in the outer periphery of a group of structures (4), and wave-dissipating concrete blocks (12) made of concrete blocks such as tetrapods are piled up on the reflecting plates (13) to form a surface-wave bulwark against earthquake. 構造物(4)群の外側周囲に表層地盤(3)の上表面近くから基礎版(5)下端までの深さに反射板(13)を打ち込み、反射板(13)の上にテトラポッドのようなコンクリートブロック製の消波ブロック(12)を積み重ねて地震表面波防波堤とする。 - 特許庁