黄河砂层"蠕动"对穿黄隧道影响的研究

Study on influence of"creep"ofsand foundation on Yellow-River-crossing tunnel

依据泥沙运动学及砂土蠕变的研究成果,对黄河高含沙水流运动规律及河床冲刷底面下砂基的变形进行了研究。采用高含沙河流的层移质运动解释了砂基蠕动,从流变学论述了冲刷高程以下砂基的蠕变问题,并研究了砂基的弹性变形。研究结果表明,黄河砂基"蠕动"不会对深埋的穿黄隧道结构造成影响。

According to the research result of silt kinematics and the creep character of sandy soil, the movement law of high silt?laden flow in the Yellow River and the deformation of sand foundation under the eroded riverbed were studied. The movement law of layered transporting matter in the river with high?level silt?laden flow was adopted to explain the creep behavior of the sand foundation and the creep problem of the sand foundation under the eroded elevation was discussed according to rheology .At the same time,the elasticity deformation of the sand foundation was analyzed.The studied result indicated that the 'creep' of the sand foundation had no influence on the tunnel structure embedded deeply across the Yellow River.