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本文分析了渗水力对中空圆柱试件应力场的影响,首次揭示了中空圆柱试件水力劈裂破坏的力学机理,试验值与理论分析值相互吻合。此外,通过试件在内壁面力作用下,弹性及塑性理论解分析表明,当快速施加内腔水压力时,因不能消除渗水力影响,是试验值低于弹性及塑性理论解的原因.本文建议今后分析土石坝防渗土体水力劈裂问题时,不能忽略渗水力对防渗土体应力场的影响.
In this paper, the influence of water seepage on the stress field of the hollow cylindrical specimen is analyzed. The mechanical mechanism of the hydraulic fracturing failure of the hollow cylindrical specimen is revealed for the first time. The experimental values and theoretical analysis values are consistent with each other. In addition, the elastic and plastic theoretical solution analysis under the effect of the inner wall surface force of the test piece shows that when the inner cavity water pressure is rapidly applied, the effect of the seepage force cannot be eliminated, which is the reason why the experimental value is lower than the elastic and plastic theoretical solution. It is suggested that the influence of seepage force on the stress field of impervious soil body can not be neglected when analyzing the hydraulic fracturing problem of earth-rock dam impervious soil.