Research on Flash Support and Rapid Drop Technology for Soft Soil Deep Foundation Pit and Engineering Application
The deformation of deep foundation pit is significant during the exposure period without support.In order to shorten the exposure time of foundation pit and control its deformation development,the flash support and rapid drop technology is developed.It draws draws on the servo axial force compensation steel support system and sliding mode technology,which can support the foundation pit in advance,thus greatly shortening the exposure time.Combined with the engineering application of the deep foundation pit at North Yanggao Road Station,the field monitoring data are compared and analyzed.The average value of maximum lateral displacement of the rapid support area is 58.5 mm,which is about 7 mm less than that of the ordinary support area.The effectiveness of the new construction method for the deformation control of the foundation pit retaining structure is verified,which can provide reference for similar engineering.
soft soil deep foundation pitflash support and rapid drop technologydeformation characteristic
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