【摘要】 根据上海市外滩观光隧道盾构掘进时周围土体中的变形、孔隙水压力、土压力和隧道衬砌压力的实测结果 ,分析了盾构掘进施工对周围土体的影响。文中提出了施工扰动影响度的定义 ,根据外滩观光隧道衬砌压力的变化估算了盾构掘进时周围土体中的应力扰动程度 ,提出了盾构掘进时地表沉降的影响范围 ,导出土体中超孔隙水压力与不排水强度的关系。更多还原

【Abstract】 The disturbance analysis of a shield tunnel construction in Shanghai Huangpu River is studied Based on the in?situ measured data the effects of the shield tunnel construction on surrounding soils are analyzed It includes the soil deformation pore waterpressure earth pressure,and pressure of lining during construction A definition of stress disturbance degree due to construction is proposed in the paper The maximum of stress disturbance degree got for the trnnel is about 0 25 the minimum?0 08 It can be used to drive the settlement range and the change in shear strength更多还原