Field Experiment and Working Mechanism of Foundation Pit Excavation Retained by Front-row Inclined Double Row Piles in Soft Soil Area
Inclined pile support has notably extended the applicable depth of unsupported retaining structures,boas-ting advantages such as cost-effectiveness,ease of construction,environmental friendliness,and precise deforma-tion control.However,current researches focus on single row inclined piles,while research on the testing,theory,and application of inclined double-row pile support remains limited.We conducted field experiments to assess exca-vation supported by double-row piles with the front row inclined.Additionally,employing the finite element meth-od,we investigated the underlying working mechanisms from three aspects:the front-row inclined double-row piles,the connecting beam on top of piles,and the soil interaction among piles.We further examined the impact of pile length and row spacing on the deformation characteristics of inclined double-row piles.Our findings indicate a marked enhancement in the supportive capabilities of front-row inclined double-row pile compared to traditional ver-tical double-row piles.The front-row inclined double-row piles primarily serve as diagonal bracing,while the beams connect the piles and the crown beam into a spatially rigid frame.Soil between the piles enhances pile-soil friction,effectively mitigating deformation in inclined double-row piles.
foundation pit excavationfront-row inclined double row pilesfield experimentworking mechanismsoft soil area
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