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隧道开挖对地面房屋影响的预测方法通常忽略房屋的刚度,假设房屋随原地面土体的变形而变形。对武汉地铁2号线某标段区间左线盾构隧道施工过程中数个地表沉降监测断面和多栋房屋的沉降情况进行系统的现场监测,揭示出房屋刚度对房屋自身变形有很大影响,不考虑房屋刚度得到的沉降预测结果可能与实际情况相差较大。同时,采用能够考虑土体小应变刚度特性的数值模拟,进一步揭示隧道开挖过程中房屋刚度对地表下方深层土体变形的影响,并讨论这种复杂的隧道开挖–土体–房屋相互作用的机制。研究结果表明,在分析隧道开挖对房屋自身及其下方桩基等结构物的影响时,有必要考虑房屋刚度的影响。
The prediction of the impact of tunnel excavation on the ground houses generally neglects the rigidity of the houses, assuming that the houses are deformed by the deformation of the ground. This paper systematically monitored the settlement of several surface subsidence monitoring sections and multiple houses during the construction of the left shield tunnel of certain section of Wuhan Metro Line 2 and revealed that the rigidity of the houses had a great influence on the deformation of houses. The result of subsidence prediction without considering the stiffness of houses may differ greatly from the actual situation. At the same time, the numerical simulation which can consider the small strain stiffness of soil is used to further reveal the influence of house stiffness on the deformation of deep soil beneath the earth surface during excavation, and discuss the complex tunnel excavation-soil-building interaction Mechanisms. The results show that it is necessary to consider the influence of house stiffness when analyzing the influence of tunnel excavation on the structure itself and the pile structure under it.