一、十年来我国在水利工程中砂砾石坝基防渗处理方面的发展解放后在党的英明领导下,我国水利事业取得了空前未有的发展,修建了数以千计的大中型水库工程.早在1950年设计的官厅水库土坝,首先遇到砂砾石坝基防渗处理问题.土坝高45米,砂砾石层深达22米,采用了开挖、回填粘土截水墙的方法,在初期的治 In the past ten years, after the liberation of China’s sand and gravel dam foundation anti-seepage treatment in the hydraulic engineering after liberation under the wise leadership of the party, China’s water conservancy has made unprecedented progress and constructed thousands of large and medium-sized reservoirs. As early as 1950, the design of Guanting Reservoir earth dam was first encountered the problem of seepage control of sand and gravel dam foundation. The earth dam is 45 meters high and the gravel layer is 22 meters deep. The method of excavation and backfilling of clay cutoff wall is adopted. The initial treatment