Numerical simulation of shield tunnel construction of adjacent masonry structure building

The effect of shield tunnel construction on adjacent masonry structure building with strip foundation was simulated by 3D FEM MIDAS/GTS software. The interaction of tunnel-soil-building was considered. The results show that: the two-way uneven settlement of building was induced during shield tunnel passing it. The maximum building shear strain decreased when the axis distance L between shield tunnel and building increased, and it reached maximum when L=0. With the increasing of shield driving distance, the maximum building shear strain increased firstly and then was stable when L=0. Compared with no building´s case, the building´s stiffness could reduce the ground uneven settlement, so the curve of surface settlement was linearly distributed. With the increasing of building floors, the foundation additional settlement increased to a lesser extent, and the maximum shear strain of wall increased rapidly, but the difference divided by its initial value was decline. When building had more than 4 floors the maximum shear strain of wall was dangerous.