粉细砂层浅埋段斜井暗挖最小支护力研究

Study on Minimum Supporting Force of Inclined Shaft in Shallow Buried Section of Fine Sand Layer

粉细砂层中浅埋暗挖段支护应力的计算是工程施工中经常遇到的问题。将盾构施工中常用的楔形体受力模型,通过分析改进,运用于斜井井筒开凿,并推导出相应的计算公式。开挖面支护应力的大小取决于埋藏深度、土体本身强度、井筒与水平面夹角以及开挖面尺寸等多种因素。

It＇s a common problem to calculate the support force of the shallow buried excavation section in the fine sand layer. The stress model of the wedge used in shield construction is analyzed and improved, which is applied in the inclined shaft. The stress of the excavation face depends on the depth of burial, the strength of the soil itself, the angle between the wellbore and the horizontal plane, and the size of the excavation face.