斜井井颈穿越第四纪表土厚层软弱土壤(如淤泥质粘土、粉细砂层等)时,往往采用明挖法施工,而后回填覆盖,因为填土比较松软且井颈与填土间也不是十分密贴,因此土壤对井颈的弹性抗力是不能考虑的。即使不是采用明挖法施工,在淤泥流砂等一类不稳定地层中,地层的弹性抗力也是不能考虑的。因此,这一类斜井井颈的设计可以根据明洞的设计原则进行。 When the inclined shaft neck passes through the Quaternary soft clay soil (such as silty clay, fine sand, etc.), it is often constructed by open excavation and then backfilled, because the filling is relatively soft and the neck and fill It is not very close, so the elastic resistance of the soil to the well neck cannot be considered. Even if it is not constructed by the open cut method, the elastic resistance of the formation cannot be considered in unstable formations such as silt-laden sands. Therefore, the design of the wellbore of this type of shaft can be based on the design principle of Myeongdong.