Based on the Mindlin solution in a semi-infinite elastic space, the composition of a settlement trough is studied by analyzing the influence of lateral pressure on the ground settlement trough, and a systematic sensitivity study on the influential parameters for the surface displacement of a single tube tunnel is conducted. Changes to the elastic modulus, Poisson's ratio, the buried depth and the stress release coefficient will affect ground loss, while changes to Poisson's ratio, the buried depth and the lateral pressure coefficient will affect the width parameters of the settlement trough. The parameters for ground loss and settlement trough width affected by tunnel construction at different stratum depths are analyzed. Compared with the horizontal surface displacement, the horizontal displace-ment in the stratum decreases significantly due to different confinement conditions.%文章基于弹性半无限空间内的Mindlin解,通过分析侧压力对沉降槽的影响,对地表沉降槽的组成进行了分析,并对单线隧道地表位移的影响参数进行了系统的敏感性研究.其中,地层弹性模量、泊松比、隧道埋深、应力释放系数的改变会影响土体损失,而泊松比、隧道埋深、侧压力系数的改变则会影响沉降槽宽度参数.最后对不同深度地层受隧道施工影响的地层损失和沉降槽宽度参数进行了分析,由于所受约束的不同,与地表水平位移相比,地层中的水平位移明显减小.
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