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第四章第八节对付砾石的措施1 概要土压系列盾构与泥水加压盾构一样,开挖而皆为密闭型,若处在有大量的粗砾石土层中,则施工很不容易。在处于有大量粗大砾石的地层中施工,会有如下的问题。 (1)砾石向后方排出; (2)螺旋输送机的止水性;
Chapter IV Section VIII Measures to deal with gravel 1 Summary Earth pressure series of shields and mud pressure shield, are all excavation and airtight, if in a large number of coarse gravel soil, the construction is not easy . In the construction of a large number of gravel in the strata, there will be the following questions. (1) the gravel is discharged to the rear; (2) the water-stopping property of the screw conveyor;