Analysis of experimental data on the effect of double-line parallel shield tunneling on the deformation of adjacent buildings

Abstract

Recent years have witnessed increasingly complex circumstances like shield passing buildings and underground structures at close range in urban tunnel design and construction. This paper has analyzed the short-distance side-crossing masonry structure engineering of the shield tunnel of Zhengzhou Metro Line 5. Using field measurement method, surface settlement, settlement and distortion of masonry structure during the construction process of double-line parallel shield tunnels successively superimposed and side-passed through the existing masonry structures, were studied. According to finding, when the construction of the double-line tunnel was completed, the maximum value of surface settlement still occurred near the centerline of the first tunnel. It was expected to make reasonable calculations and assessments for the safety of masonry structures after shield crossing construction and provide reference for similar projects in future.