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用断裂力学对单支墩大头坝的劈头裂缝进行稳定性分析。把劈裂缝视为线弹性的１／４半无限体内半椭圆片状裂缝。用有限元法计算出承载而未开裂的坝体在假定缝面上的应力，运用线性叠加原理计算出裂缝在各种荷载作用下的缝端应力强度因于值ＫＩ，并与二维的ＫＩ值作以比较。通过分析，认为该坝急需防渗加固处理。
Fracture Mechanics Analysis on the Head Cracking of Single Pier. Treat splitting as a linear elastic half-ellipse semi-elliptical plate-shaped crack. Finite element method is used to calculate the stress of prestressed but not cracked dam body on the assumed seam surface. The stress intensity at the crack tip under various loads is calculated by linear superposition principle. Because of the value of KI, Value for comparison. Through analysis, it is considered that the dam needs anti-seepage reinforcement treatment urgently.