To study the distribution characteristics and variation rules of ground subsidence. The influence law of overburden thickness is studied by 3D numerical simulation. The cumulative sedimentation of the ground decreases linearly with the increase of the thickness of the casing in the range of 0.5 times the width of the central axis of the large pipe tunnel. The cumulative settlement of the ground increases with the thickness of the casing. The thickness of the casing on both sides of the central axis of the small pipe tunnel, the superposition disturbance of the large and small pipe jackers is significantly.

中文翻译：

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浅埋双线平行矩形顶管施工对地面沉降变形的影响

研究地面沉降的分布特征和变化规律。通过3D数值模拟研究了覆盖层厚度的影响规律。地面的累积沉降随着套管厚度的增加而线性减小，范围是大型管道隧道中心轴宽度的0.5倍。地面的累积沉降随套管的厚度而增加。小管隧道中心轴线两侧的套管厚度，对大，小顶管的叠加扰动明显。