拱坝接缝灌浆过程中缝面压力数值分析

Numerical Analysis of Seam Surface Pressure in Process of Seam Grouting at Arch Dam

为研究拱坝接缝灌浆过程中缝面压力分布的特征,根据建立的缝面非稳定灌浆浆液渗透模型,开发了相应的数值分析程序。通过算例进行数值分析,结果表明:初始灌浆阶段,缝面压力集中在浆液入渗点附近,随着灌浆的持续进行,压力逐渐向缝面内部扩展至出渗点,据此可判断接缝灌浆可以结束的时间。另外,该模型可以优化接缝灌浆系统的布置。

In order to study the characteristics of seam surface pressure distribution in the process of seam grouting at arch dam, the numerical simulation program is developed based on the model of unsteady slurry seepage through seam surface. The results show that during the initial grouting period, the seam pressure concentrates on the point in the vicinity of slurry in-seepage region and, subsequently, the pressure gradually spreads to out-seepage region. Based on the characteristics, the terminative grouting time can be estimated. And furthermore, the layout of seam grouting system can be optimized by means of the model.