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以武汉地铁四号线某区间隧道作为研究对象,对该盾构区间隧道所获得的地表沉降监测数据进行分析和处理。对地铁隧道引起的地表沉降规律进行了深入的分析,探讨了建筑物与隧道轴线的距离、隧道埋深等因素对地表沉降的影响。结果表明,建筑物和隧道轴线的距离L与隧道直径D的比值大于3.21时,建筑物对地表沉降的影响较小,比值小于3时,地表沉降急剧增大,其中,比值在1~3之间,将导致明显的建筑物倾斜,比值接近于零时,建筑物呈现整体下沉趋势。最后,基于Peck公式,提出了实用的沉降分析模型,并将其应用于工程实例,验证了预测模型的有效性。
Taking a certain section of the tunnel in Wuhan Metro Line 4 as the research object, the monitoring data of surface subsidence obtained from the tunnel in this shield are analyzed and processed. The ground subsidence caused by the subway tunnel is analyzed in depth. The influences of the distance between the building and the tunnel axis and the depth of the tunnel on the settlement of the ground surface are discussed. The results show that when the ratio of the distance L between the building and the tunnel axis to the tunnel diameter D is greater than 3.21, the impact of the building on the settlement of the ground surface is small. When the ratio is less than 3, the surface settlement sharply increases, of which the ratio is between 1 and 3 Between the buildings will lead to significant building tilt, the ratio close to zero, the overall decline in the overall building trend. Finally, based on the Peck formula, a practical settlement analysis model is proposed and applied to engineering examples to verify the effectiveness of the prediction model.