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中文摘要：
粗糙的总数是面对水泥的摇充满水坝的主要基础结构材料并且被巩固忍受上面、侧面的负担。随水坝高度的增加，高限制压力和复杂压力状态复杂化粗糙的总数的 shear 行为，并且因此阻碍高水坝的合适的构造，操作和维护。一个试验性的节目被进行学习水坝的 shear 行为用大规模 triaxial 的粗糙的总数砍仪器。通过 triaxial 砍测试，总数的紧张压力行为在不变的限制下面被观察压力：300 kPa， 600 kPa， 900 kPa 和 1200 kPa。砍力量和与高压力联系的总数破裂特征砍过程被讨论。压力路径测试被进行在复杂压力状态下面观察并且分析粗糙的总数反应。在 triaxial 砍测试，山峰 deviator 与限制压力一起强调增加，这被发现，而山峰主管压力比率作为限制减少，压力增加。与增加限制压力，膨胀减少，收缩最后占优势。起始的力量参数(泊松的比率和正切模量) 与限制压力看一种非线性的关系压力什么时候是相对低的。砍力量参数与增加限制压力减少。失败信封线是凸的曲线，与在低限制压力下面的清楚的弯曲。在中等限制压力下面，膨胀是由粒子破裂的偏移量。在高限制压力下面，膨胀消失。
英文摘要：
Coarse aggregates are the major infrastructure materials of concrete-faced rock-fill dams and are consolidated to bear upper and lateral loads. With the increase of dam height, high confining pressure and complex stress states complicate the shear behavfor of coarse aggregates, and thus impede the high dam＇s proper construction, operation and maintenance. An experimental program was conducted to study the shear behavior of dam coarse aggregates using a large-scale triaxial shear apparatus. Through triaxial shear tests, the strain-stress behaviors of aggregates were observed under constant confining pressures： 300 kPa, 600 kPa 900 kPa and 1200 kPa. Shear strengths and aggregate breakage characteristics associated with high pressure shear processes are discussed. Stress path tests were conducted to observe and analyze coarse aggregate response under complex stress states. In triaxial shear tests, it was found that peak deviator stresses increase along with confining pressures, whereas the peak principal stress ratios decrease as confining pressures increase With increasing confining pressures, the dilation decreases and the contraction eventually prevails. Initial strength parameters （Poisson＇s ratio and tangent modulus） show a nonlinear relationship with confining pressures when the pressures are relatively low. Shear strength parameters decrease with increasing confining pressures. The failure envelope lines are convex curves, with clear curvature under low confining pressures. Under moderate confining pressures, dilation is offset by particle breakage. Under high confining pressures, dilation disappears.
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