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概述衡量混凝土重力坝安全性的主要指标之一是大坝的抗滑稳定系数。当地基中存在缓倾角的软弱夹层时,对大坝的抗滑稳定十分不利,必须核算坝体带动部分基岩沿软弱面失稳的可能性。对于这类问题,常称为深层抗滑问题。根据不完全的统计,在所调查的国内一百多个已建或正在设计施工的大中型水利水电工程中,有92座坝址存在深层抗滑问题,其中因此而改变设计、降低坝高、增加工程量或后期加固的共达30多座,有的因此而停工、改变坝
Overview One of the main indicators for measuring the safety of a concrete gravity dam is the anti-sliding stability factor of the dam. When there is a soft dip with a gentle dip in the foundation, it is very unfavorable to the anti-slide stability of the dam. Therefore, it is necessary to account for the possibility that the dam body will cause partial instability of the bedrock along the weak plane. For such problems, often referred to as deep anti-skidding problem. According to incomplete statistics, 92 large and medium-sized hydropower projects under construction or under construction in the surveyed area have deep anti-skidding problems. As a result, the design is changed to reduce dam height, Increase the amount of engineering or post-reinforcement of a total of more than 30 seats, and some due to suspension, changing the dam