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本文叙述了一个在建中177米高的重力拱坝的一些主要基础问题。由于受到多次构造运动和其它地质因素影响,两岸坝肩被8条大断层和4组裂隙相互交切,使坝肩岩体的完整性受到一定程度的破坏。 在这种地质条件及其它一些不利的地形情况下建造重力拱坝,要十分慎重。文中扼要叙述了我们在设计该坝过程中,对坝肩抗滑稳定和深层断层特殊处理这两个问题所做的一些考虑和初步探讨。通过计算、试验研究和分析,本坝地质条件虽复杂,但只要继续进行仔细的工程处理和研究,坝肩抗滑稳定和变位情况是能满足将来大坝安全运行要求的。
This article describes some of the major foundational issues of a gravity arch dam under construction at a height of 177 meters. Due to the multiple tectonic movements and other geological factors, the two abutments are intersected by 8 large faults and 4 groups of fractures, so that the integrity of the abutment rock mass is damaged to some extent. It is prudent to construct gravity arch dams under such geological conditions and other unfavorable topographical conditions. The paper briefly describes some considerations and preliminary discussions on the two issues of anti-sliding stability of dam abutment and special treatment of deep faults in the process of designing the dam. Through the calculation, experimental study and analysis, the geological conditions of this dam are complex, so long as the careful engineering treatment and research are continued, the stability and displacement of the abutment against skids can meet the requirements of future dam safety operation.