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List of products by author: Z. Liu
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An automated and rapid measuring method for cross-section deformation of shield tunnels
Abstract: Due to the high cost and continuously aging deterioration, the inspection and maintenance of structures have become increasingly important in the tunneling field over the past decades [1]. Shield tunnel consists of precast concrete segments that form rings by the connection of steel bolts. Unlike tunnel constructed by cast-on-site concrete linings, the rigidity of shield tunnel is relatively...
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Full-Scale Experimental Investigation on Influence of Active Temporary Column on Column-Free QuasiRectangular Shield...
Abstract: In the whole construction-operation process of shield tunnel, synchronous grouting is utilized to control the ground loss. However, the grouting pressure caused by synchronous grouting may lead to relatively unfavourable internal force and deformation response on tunnel structure. Furthermore, it may cause a series of adverse consequences such as cracking and leakage. In order to reduce the...
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Local-stiffness-modified Beam Spring Model Simulation on Column-free Quasi-Rectangular Segmental Tunnel Lining
Abstract: The beam spring model (BS model) has better simulation results on the shield tunnel structure than the equivalent stiffness homogenization ring model (ESHR model). For the structure with longitudinal joints governed by large bending moment, the BS model can partly simulate the deformation characteristics of the structure caused by the joints. However, the BS model still has certain limitations...
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Mechanical behaviour of quasi-rectangular segmental tunnel lining
Abstract: The quasi-rectangular segmental tunnel lining is a new alternative for shield driven tunnels in urban railway transportation. It is firstly designed and employed in Metro Line 3 in Ningbo, China for its applicability in high density urban areas. The bearing capacity of this new structure is of great importance during its utilization period, as it is related to the safety reserve. In this study,...
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Statistical Evaluation of Buildings Disturbed from Metro Shield Tunnelling in Soft Soil
Abstract: Residential buildings in downtown would suffer disturbance from tunnelling, even with the help of shield machine. Tunnelling in soft soil induces subsidence of ground above metro tunnels, resulting in structural damage of buildings. In the presented study, relevance between field monitoring data of buildings and tunnelling parameters is investigated. The collected data of buildings includes...
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