垫层区开裂和亏坡
cracking in cushion layer and slope deficiency
坝内垫层钢管
embedded penstock with cushion layer
侧边墙介电垫层
sidewall dielectric spacer
弹性垫层
elastic cushion layer
interpolating polymer layer
地沥青垫层护岸
asphalt mattress revetment
垫层侧面软土约束
soft soil restrain along lateral surface of cushion