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  Influence on the existing building caused by shallow metro tunnel by excavation under crossing in short distance

  In recent years, as the continuous increasing of the national economy, urban rail transit construction is stepping into a rapid developing period. The buildings on the city ground are intensive. Surrounding environment impact caused by new tunnel construction is gradually becoming the hot issue of underground engineering field, the common characteristic of which is the strict requirement for stratum deformation controlling. The method of shallow embedded and hidden excavation is a common construction method in metro tunnel construction. Because of tunnel construction, surrounding stratums are disturbed, generating stress redistribution and heterotaxy and easily causing surrounding stratums and adjacent buildings to additional settlement.

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