一、简要的历史回顾 本文提到的软岩,除了指强度较低的岩石之外,还包括含有软弱夹层、互层及因断裂发育而强度削弱了的岩石。在中国坝工建设中,经常遇到软弱夹层问题。据不完全统计,由于软弱夹层的影响而改变设计或降低坝高、或增加工程量、或后期加固的计有30余座。我国对坝基中软弱夹层的研究,可追溯到50年代中期。当时正在施工中的上 First, a brief historical review Soft rock referred to in this article, in addition to refer to the lower strength of the rock, but also includes weak intercalations, interbedded and due to the development of the weakening of the rock fracture. Dam construction in China, often encounter weak sandwich. According to incomplete statistics, due to the influence of the weak interlayer, the design or lowering of the dam height, or the increase of the engineering quantity or the post-reinforcement of more than 30 seats are taken. Our research on the weak foundation in the dam foundation can be traced back to the mid-1950s. It was under construction at that time