A three-dimensional finite element model of subgrade,soil and composite pipe corridor was established based on ANSYS,and the mechanical performance of the pipe corridor segment and the displacement response of the underlying soil under traffic load were analyzed.The influence of traffic load difference and pipe corridor stiffness on the longitudinal deformation distribution of lying soil was studied.By extracting the dynamic stress state of the soil under different pipe joints,combined with the empirical formula and the layering sum method,the predicted settlement values of different adja-cent pipe joints were obtained.The results show that the vertical additional stress of traffic load decreases along the depth direction and decreases faster in the depth of 2.5 m.As the influence of pipe corridor structure is transmitted,the displace-ment response of the underlying soil mass has the spatial lag along the pipe corridor.The spatial position of traffic load has a great influence on the uneven settlement of pipe corridor,and the single moving direction is more unfavorable in the working direction of 90°,and the uneven settlement is more obvious in the working condition of cross pavement.With the increase of pipe corridor stiffness,the displacement response peak of the underlying soil becomes smaller,and the overall settlement and uneven settlement of the section decrease.The research results of this paper can provide reference for the study and settlement control of the uneven settlement of integrated pipe corridor in soft soil area.
integrated pipe gallerytraffic loadsettlement predictionuneven settlementsoft soil foundation
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