地铁隧道施工扰动地层，必然造成相应的地层变形。
Due to the disturbance to the ground induced by construction of Metro tunnels, ground deformations occur inevitably.
试验和分析结果表明：由于隧道施工扰动的影响，使得土的强度发生了变化，总体上降低了土的强度。
The testing and analysis have shown the tunneling construction disturbance makes the soil strength change and tends to be lower in all.
在隧道设计、施工或使用过程中任何有害扰动都会造成隧道防排水体系的缺陷，从而引起隧道渗水。
Any harmful disturbance in the tunnel design, the process of construction or use, all would lead to defects in the tunnel waterproofing and drainage system, causing the tunnel seepage.
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