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当水库蓄满水时， 会出现与中心悬臂梁基础上游裂缝扩展有关的基础稳定问题。这可能导致产生高压应力和剪切应力以及产生渗漏， 通常认为这种情况是一个严重的安全问题。在Ｖ 型大峡谷中， 抛物线拱坝通常要优于圆形拱坝。在当前的研究中， 采用线性ＤＥＳＡＲＣ３．２程序，对高２４０ ｍ 的拱坝进行了圆拱及抛物线拱对比分析， 用来说明哪一种型式的拱坝对这种基础裂缝更敏感。
When the reservoir is full of water, there will be a fundamental stability problem associated with the expansion of the upstream crevasse at the center of the cantilever. This can lead to high compressive and shear stresses and leakage, which is often considered a serious safety issue. In the V Grand Canyon, parabolic arch dam usually better than circular arch dam. In the present study, a circular DESARC 3.2 program was used to compare the arched and parabolic arch of a 240-m high arch dam to indicate which type of arch dam is more susceptible to this type of base fracture.