【摘要】 为研究井帮位移收敛对冻结壁厚度的影响，获得满足施工要求的开挖净空间，基于小孔扩张理论，建立井帮变形与冻结壁厚度的计算公式，验证已建公式的正确性，探讨已建公式对井帮变形的计算误差。结果表明：随着冲积层深度增大，井帮位移收敛对冻结壁厚度的影响加剧，冲积层深度越大，越不能忽略井帮收敛的影响；已建公式能够解决应变高达0.15的有限变形问题，亦可有效预测千米冲积层立井井帮位移收敛值；冻土的黏聚力和内摩擦角对冻结壁厚度影响显著，弹性模量和黏聚力是井帮变形的重要影响因素。研究成果对深厚冲积层冻结法凿井具有重要的理论意义和实用价值。更多还原

【Abstract】 In order to investigate the influence of shaft-flank displacement convergence on frozen wall thickness and obtain excavated desired clearance meeting construction requirements, a calculation formula of side-wall deformation and frozen-wall thickness was established based on the cavity expansion theory. The established formulas was verified and the calculation errors of the established formulas on shaft-flank deformation were discussed. The results indicated that the effects of sidewall displacement convergence on a frozen wall thickness increased with the increase of alluvium depth. The greater the alluvium depth was, the more the influence of sidewall convergence could not be ignored. The established formulas solved a finite deformation problem with strain of up to 0.15 and effectively predicted the shaft-flank displacement convergence of a kilometer alluvium shaft. The cohesion and internal friction angle of frozen soil had a significant impact on frozen wall thickness. The elastic modulus and cohesion were important factors affecting shaft-flank deformation. The research results had an important theoretical significance and application value for the deep alluvium freezing shaft sinking.更多还原