The relationship between rock-socketed depth of occlusive pile and deformation and stress of foundation pit support structure in composite strata is analyzed by using FLAC3D numerical simulation software.The results show that the maximum horizontal displacement of occluded piles in composite strata does not decrease with the increase of embedding depth.When the embedding depth reaches a certain value,increasing the embedding depth can hardly reduce the maximum displacement of occluded piles.This law has similar effects on the maximum support axial force,the maximum positive and negative bending moment of the bite pile body and the displacement of the soil outside the pit.Therefore,the embedding depth of rock-socketed occlusive piles in the foundation pit of metro station in composite stratum area is suggested to be 2 m under the condition of meeting the checking calculation of seepage resistance stability.This study can provide reference for the design of foundation pit support of metro stations and high-rise buildings under similar geological conditions.
关键词
地铁车站/复合地层/支护结构/咬合桩/嵌岩深度/数值分析
Key words
metro station/composite stratum/support structure/occluded pile/rock-socketed depth/numerical analysis
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