沉管隧道压砂法砂垫层液化可能性分析研究

Study on the Possibility of Liquefaction of Sand Cushion in Immersed Tunnel

结合动弹性模量试验、抗液化强度试验和数值计算方法,对沉管隧道压砂法地基液化及抗震性能进行了分析,从而获得地震荷载作用下0.6 m厚度压砂法砂垫层剪应力比分布状态与孔压分布,结合砂垫层砂土动模量与动液化强度试验结果,判断压砂法砂垫层的抗液化情况,该方法具有很好的实用价值。

Based on the test for dynamic modulus of elasticity and test for resistance to liquefaction and seismic performance are analyzed, so as to obtain the shear stress distribution and the distribution of pore water pressure of 0. 6 m thickness;sand pressing method; sand cushion under earthquake loading, combined with sand-sand cushion dynamic modulus and damping ratio test results of liquefaction strength with the move,estimate the anti liquefaction pressure sand sand cushion method, this method has very good practical value.