大型船闸闸墙锚杆的分析与设计

结合三峡船闸衬砌式闸墙的设计研究工作，提出了采用具有自由长度的锚固新方案。此方案在结构与岩体间保持一段可以自由剪切和弯曲的锚杆段，该锚杆段的长度称为自由长度。通过对闸墙受渗透压力、闸墙自重和温度等荷载的分析，发现锚杆自由长度对锚杆轴力的影响较小，而对锚杆剪力的影响很大。当自由长度增大时，锚杆的剪力迅速减小。由于自由长度的采用，解决了三峡船闸闸墙锚杆在一些荷载作用下的高剪应力问题。

ANALYSIS AND DESIGN OF ANCHOR RODS OF LARGE SHIP LOCK WALL

On the research and design of the large liner-type lock wall of Three Gorges Project, a new anchorage scheme is proposed. This new scheme suggests that a shear and/or bending deflection would be allowed to take place freely in the specific part of the anchor rod which lies between the structure and the rock mass. The length of this special part of anchor rod is called the anchorage free length. By means of analysis of the ship lock wall under the action of seepage pressure, temperature effect and its dead load, it is found that the effect of free length upon the axial force of the rod is small While the effect upon the shear force is large. When the fine length becomes longer, the shear force of the anchor rod decreases rapidly. Owing to the adoptiong of this new anchorage scheme in construction of lock wall of Three Gorges Project, the high shear stress induced in anchor rods is avoided.