Design of Large Scale Deep Foundation Pit Support Construction Scheme in Soft Soil Area
Combined with the construction practice of a large deep foundation pit project,the paper analyzes the design of deep foundation pit support scheme,earthwork excavation design and dewatering design in the soft land area of the dark creek,and monitors the construction effect of the foundation pit.The results show that the supporting structure scheme adopted in this deep foundation pit project is slope release + gravity dam,slope release + construction pile + steel support.The cumulative settlement of the surrounding ground is 22.4 mm,the cumulative settle-ment of the surrounding pipeline is 12.3 mm,the cumulative vertical displacement of the top of the supporting structure is 27.5 mm,the cumula-tive horizontal displacement of the top of the supporting structure is 30.4 mm and the horizontal force of the supporting axial force is 2 500 kN.The surrounding settlement of the foundation pit and the deformation of the supporting structure at all monitoring points do not exceed the warning value.It is proved that the support structure scheme and construction technology adopted in this project have obvious safety and reliability.
Soft soil areaDeep foundation pit engineeringSupporting structure
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