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为了分析各荷载对造成深厚表土层立井井壁破裂的竖向应力的影响,对作用于井壁上的温度效应、自重、水平侧压力和竖向附加力在井壁内产生的竖向应力分量进行分析。分析表明,竖向附加应力和温度应力是造成井壁破裂的重要因素。进一步的分析表明,井壁内温度应力竖向分量随井壁内、外温度差增大而增大;随井壁厚度的增大,井壁内竖向附加应力明显减小,而温度应力则无明显变化。
In order to analyze the influence of each load on the vertical stress caused by shaft wall rupture in deep topsoil, the vertical stress components in the shaft wall caused by the temperature effect, self-weight, lateral pressure and vertical additional force acting on the shaft wall are analyzed. Analyze. The analysis shows that the vertical additional stress and temperature stress are the important factors that cause the wall breakage. Further analysis shows that the vertical component of temperature stress in the borehole wall increases with the temperature difference between the inside and outside of the borehole wall. With the increase of the borehole wall thickness, the vertical additional stress in the borehole wall obviously decreases, while the temperature stress No significant changes.