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Abstract With the development of city scale，engineering land subsidence caused by dense buildings has been paid more and more attention to. According to different floor area ratios，the rule of engineering land subsidence caused by dense buildings in soft soil area of Shanghai is discussed by means of centrifugal model test. Results show that the subsidence of soft soil layers is a main component of land subsidence. The subsidence variation with time of strata and regional points accords with exponential function. The superimposition effect of dense buildings on land subsidence is obvious and increases with the floor area ratios. In a certain floor area ratio，the superimposition effect of land subsidence has a significant time effect. The floor area ratio should be controlled in a certain extent to prevent land subsidence exceeding allowable value，which will cause instability of urban environment.
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Received: 25 February 2010
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