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水库蓄水后，在一定空间范围内形成了应力场、应变场和渗流场。我们建立了一个数学一力学模型，以描述水压应力场的特征。通过运用弹塑性岩土体非线性应力一应变和稳定性静力分析ＮＯＬＭ８３二维有限元程序发现，水库水压应力场的最大主应力从水库中心向两侧、从水库表面向深部逐渐降低。在此基础上，研究了在未来三峡水库水压应力场影响下，水田坝断裂的应力、应变和影响范围。研究表明，平面影响范围为该断裂两侧５～—６ｋｍ。由于岩体的浮托作用，地表面的累积位移量少于１０ｍｍ，并向下逐渐减小。因此，水田坝断裂完全能够承受三峡水库蓄水后产生的水压应力，不会出现中－强度水库诱发地震，不会影响三峡工程的安全。
After the reservoir is impounding, stress field, strain field and seepage field are formed within a certain spatial range. We have established a mathematical-mechanical model to characterize the hydrostatic stress field. By using NOLM83 two-dimensional finite element program by using nonlinear stress-strain and stability analysis of elastic-plastic rock and soil, it is found that the maximum principal stress of reservoir hydraulic stress field decreases gradually from the reservoir center to both sides and from the reservoir surface to the deep. On this basis, the stress, strain and influence range of the paddy field dam under the influence of the hydraulic stress field of the Three Gorges Reservoir are studied. The research shows that the plane influence range is 5 ~ 6km on both sides of the fault. Due to the floatation of the rock mass, the cumulative displacement of the ground surface is less than 10 mm and decreases downward. Therefore, the fault of the paddy dam can fully withstand the hydraulic stress generated by the impoundment of the Three Gorges Reservoir, and no earthquake will be induced by medium-strength reservoirs and will not affect the safety of the Three Gorges Project.