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考虑ＤＸ桩的实际受力性状，得出了桩基承力扩大盘周边土体的应力应变及位移分析的解析解，基本反映了土体在挤扩过程中的运动规律，并分析了ＤＸ桩承力扩大盘（或支）的形成机理。
Considering the actual mechanical behavior of DX piles, the analytic solution of the stress, strain and displacement of the soil near the pile bearing capacity expansion is obtained, which basically reflects the movement law of the soil in the process of squeezing and expanding. Support the expansion of disk (or branch) formation mechanism.