小浪底大坝防渗墙设计

Design of Infiltration Protection Wall at Xiaolangdi Dam

小浪底主坝防渗墙是坝基砂砾石覆盖层渗流控制的关键工程，最深达８０多米。鉴于该工程的重要性、复杂性，对防渗墙的结构进行了系统研究。参考防渗墙应力应变计算结果，类比国外同等规模防渗墙的设计和原型观测结果，结合目前防渗墙施工技术水平，最终确定的防渗墙宽度为１．２ｍ，混凝土设计抗压强度Ｒ２８＝３５ＭＰａ。

The infiltration protection wall of deepest of over 80 meters at Xiaolangdi dam is the key project to control infiltration in the sand and gravel layer at dam base. In view of the importance and complexity of the project,the systematical study of the structure of the infiltration protection wall is tarried out. Referring to the calculation of stress action of infiltration protection wall,comparing to similar designs and field measurements of other countries and combining with the current level of infiltration protection wall implementation techniques,the final design of the wall is with width of 1. 2 meters,and concrete standard of R28=35MPa.