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本文通过原体观测资料的分析研究了横山土坝的变形及应力特性。分析表明,横山坝的沉降和位移均可用双曲线方程表示,位移比基本上不随时间而变,可视为常数。坝竣工2-4年后,变形即基本稳定。此时,稳定沉降达最终沉降的80％以上。水库首次蓄水对上游坝壳的沉降有较大的影响。另外,也研究了心墙分层沉降的特性。心墙内的孔除水压力有明显增大,而土压力则减小,这些现象是不正常的。
In this paper, we analyze the deformation and stress characteristics of Hengshan earth dam by analyzing the original observation data. The analysis shows that the settlement and displacement of Hengshan dam can be expressed by the hyperbolic equation. The displacement ratio basically does not change with time, and can be regarded as a constant. Dam completed 2-4 years later, the deformation is basically stable. At this point, the steady settlement reached more than 80% of the final settlement. The first impoundment of reservoir has a great influence on the settlement of upstream dam shell. In addition, the characteristics of the core-wall subsidence are also studied. The pressure inside the core wall of the water removal significantly increased, while the earth pressure is reduced, these phenomena are not normal.