Study of Optimum Building Spacing of Dense High-Rise Building Group in Shanghai Based on Centrifugal Model Test
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Facing the problem of soaring urban population caused by accelerated urbanization in China, more cities choose dense high-rise building groups to release pressure of tremendous land requirement, which is proved effective. However, those building groups could also induce over-standard engineering land subsidence, which can be a catastrophe especially to low-altitude cities. Land subsidence had been well controlled by limiting the excavation of groundwater in Shanghai, but the continuing urban construction made the effort not as useful as before, engineering-environmental effect caused by dense high-rise building group had become a main form of land subsidence in Lujiazui, Shanghai, the chosen area in this paper. Through the model test by Tongji University TLJ-150 geotechnical centrifuge, this paper studies the influence of three different building spacing on the land subsidence of dense high-rise building group. Through data analysis base on simplification of viscoelastic foundation, if displacement is considered only, the optimum building spacing of dense high-rise building group in Shanghai Lujiazui is attained as 34 m. The paper also deduces the displacement–time (S–t) equation from displacement–time curve and the displacement-distance (S–L) equation.
KeywordsSoft soil Dense high-rise building group Engineering land subsidence Optimum building spacing Centrifugal model test
This work is supported by Subject of National Science and Technology Supporting Plan (2012BAJ11B04), National Nature Science Foundation of China (40872178 & 41072204) and Shanghai Leading Academic Discipline Project (project No.B308).
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