Lightlateral and axis and torsion vibrations do not affect the normal work, but the resonance state has severity effect to drill string.
轻微的横向、轴向及扭转振动不影响钻井的正常作业,而钻柱的共振状态会对钻井产生严重的影响。
2
Foam concrete wall used for light bet backfilling materials can reduce the vertical section load, also reduced the wall lateral load of the other side.
泡沫混凝土在岸墙后用作轻质回填材料可降低垂直截荷,也减少了对岸墙的侧向载荷。
3
Light steel reinforced concrete shear wall is a system structure resisting lateral force, so the shear strength is the main performance parameter.