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地震时放出的能量将引起饱和砂体内孔隙压力的改变。如果孔隙压力增量超过特定值,则土可发生液化。在没有完全液化的情况下,可发生过大的沉陷。从Ukai,Obra,Tennghat坝基和Solani河获得的砂的实验室研究是在振动参数能单独改变的稳定状态的水平振动台上进行的。这些砂的粒径在细至很粗的范围内变化。研究了原始相对密度,原始有效超载,运动的循环次数和振动参数的作用。
The energy released during an earthquake will cause changes in the pore pressure within the saturated sand. If the pore pressure increase exceeds a specific value, the soil may liquefy. In the absence of complete liquefaction, excessive subsidence can occur. The laboratory study of sand obtained from Ukai, Obra, Tennghat Dam Foundation and the Solan River was conducted on a steady-state horizontal shaking table where the vibration parameters can be individually changed. The particle size of these sands varies from fine to very coarse. The effects of the original relative density, the original effective overload, the number of cycles of motion and the vibration parameters were studied.