Slurry shield TBMs with full-face mechanized excavation and active face support using slurry suspension are increasingly being employed for the construction of underwater tunnels. When tunneling in permeable sandy ground, the choice of suitable excavation management system and volume calculation method is extremely important to prevent security emergencies such as face collapse, water inflow and ground deformation. However, this subject has not attracted adequate attention in previous studies. Until now, there is still a lack of reliable methods to calculate geomaterials excavated from the tunnel face in permeable sandy ground. In the present study, shortcomings of traditional calculation method have been analyzed. Improved calculation method considering the effect of slurry filtration loss and ground water displacement has been proposed to evaluate the performance of excavation management system in permeable sandy ground. A case study of Sutong GIL Yangtze River Crossing Cable Tunnel has been carried out. The results indicate that the calculation error based on the improved method is smaller than that based on the traditional method. The improved method is much more suitable for permeable sandy ground.

具有全机械化开挖的泥水盾构TBM和使用泥浆悬浮液的主动面支撑技术正越来越多地用于水下隧道的建设。在渗透性砂土中开挖隧道时，选择合适的开挖管理系统和体积计算方法对于防止安全事故（如面崩塌，涌水和地面变形）极为重要。但是，该主题在先前的研究中尚未引起足够的重视。到目前为止，仍然缺乏可靠的方法来计算在可渗透的沙土中从隧道工作面挖掘的土工材料。在本研究中，分析了传统计算方法的缺点。提出了一种考虑泥浆滤失和地下水驱替影响的改进计算方法，以评价渗透性砂土中开挖管理系统的性能。以苏通吉尔长江跨江电缆隧道为例进行了研究。结果表明，改进方法的计算误差小于传统方法的计算误差。改进的方法更适合于渗透性砂土。