破裂井筒侧摩阻力分析

The analysis of the lateral resistance on the fractured shaft wall

根据有效应力原理 ,对破裂井筒详细调查 ,建立由多个含、隔水层组成的厚表土底部固结沉降井壁侧摩阻力的概化模型。指出这类井壁不仅有负阻力 ,同时还有正阻力及零阻力井段 ,它们的分布决定了井壁挤压破裂及拉伸的部位。

According to the principle of effective stress,the general model for lateral resistance on the shaft wall has been constituted in this paper.The lateral resistance results from soil consolidation settlement at the bottom of overburden around the shaft.On this shaft wall,there is not only negative,but also position and zero skin friction.The distribution of lateral resistances determines the position where compressive fracture and tensile strain occurred.Moreover,the relationship between the shat fracture and rainy season has been illustrated on the basis of the variety of the effective stress.