Abstract
Through the simulation analysis of the settlement and deformation law of the surface buildings caused by the construction of the biased tunnel, the following points are obtained: (1) The Peak formula is revised, and the influence range of the biased tunnel is predicted based on the formula. (2) It is concluded that when the tunnel is biased, the position of maximum deformation caused by ground settlement is generally in a parallel area 0.5 times the buried depth from the center line of the tunnel. (3) Through the double-layer verification of simulation analysis and monitoring measurement data, prior to the construction of buildings with similar weak foundations, their foundations should be reinforced in advance. (4) In the process of this simulation, the complicated influence of water pressure on tunnel excavation was not considered, which can be further optimized in the later stage.
Highlights
The tunnel excavation process will have many adverse effects on the surrounding environment
By improving the Peak formula, assuming that the tunnel's influence range is 5 times the diameter of the tunnel, the settlement law at any point of the stratum affected by the biased tunnel can be calculated as:
Compared with the settlement change law of the actual building foundation, the influence range deduced by the formula has more accurate guiding significance
Summary
The tunnel excavation process will have many adverse effects on the surrounding environment. We are going to adopt the method of combining theory and practice, combined with engineering examples, and use FLAC3D to establish a numerical model to carry out the research on the impact of the underpass construction of the biased tunnel on the adjacent buildings.
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