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Numerical simulation of shield tunnel construction of adjacent framework structure building

机译:邻近框架结构建筑物盾构隧道施工的数值模拟

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The framework structure building with single foundation crossed by shield tunnel with 90 degree was simulated by 3D FEM MIDAS/GTS software. The interaction of tunnel-soil-building was considered, and the settlement and stress of building was analyzed. The result shows that: the two-way uneven settlement of building was induced during shield tunnel passing it. Building was induced long-term uneven settlement along the transverse direction. Along the shield tunneling direction (longitudinal), building was induced short-term uneven settlement. The maximum first principle stress P1 decreased when the axis distance L between shield tunnel and building increased, and it reached maximum when L=0. The maximum transverse and longitudinal horizontal displacements of framework increased firstly and then decreased with the L increasing. With the increasing of shield driving distance, P1 increased firstly and then was stable when L=0. When the tunnel was tangent to outer edge of foundation, with the increasing of shield driving distance, P1 increased firstly and reached the maximum when the shield tunnel was going to through the building, then it decreased. The uneven settlement of foundation and P1 increased significantly when the soil was worse.
机译:利用3D FEM MIDAS / GTS软件模拟了单一地基与90度盾构隧道交叉的框架结构。考虑隧道-土木建筑的相互作用,分析了建筑物的沉降和应力。结果表明:盾构隧道通过时引起建筑物双向不均匀沉降。建筑物沿横向方向长期不均匀沉降。沿盾构隧道方向(纵向),引起建筑物的短期不均匀沉降。当盾构隧道与建筑物之间的轴距L增加时,最大第一主应力P 1 减小,而当L = 0时,最大第一主应力P 1 达到最大值。随着L的增大,框架的最大横向和纵向水平位移先增大然后减小。随着盾构驱动距离的增加,P 1 先增大,然后在L = 0时保持稳定。当隧道与地基外缘相切时,随着盾构掘进距离的增加,P 1 首先增加,并在盾构隧道穿越建筑物时达到最大值,然后减小。当土壤变差时,地基和P 1 的不均匀沉降明显增加。

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