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为优化基坑工程中的排桩支护形式,改善支护桩受力特性,对深基坑悬臂式倾斜支护桩进行了三维数值模拟计算与分析,深入研究了基坑悬臂式倾斜支护桩的变形与受力规律,并将所得结果与传统的直立支护桩受力特性进行了对比分析。研究结果表明:倾斜支护桩的桩顶水平位移较传统直立支护桩明显减小,支护桩抗倾覆能力得到了提高;桩身侧移曲线相对平缓,桩体主要发生刚性位移,较直桩支护形式减小了应力集中发生的可能性;桩身弯矩分布更加均匀,正、负弯矩峰值相近,与传统直桩支护形式相比,更充分利用了桩体的材料强度,具有显著的工程应用价值和经济效益。
In order to optimize the form of bolting support in foundation pit engineering and improve the bearing capacity of supporting pile, three-dimensional numerical simulation and analysis of cantilever inclined support pile in deep excavation are carried out. The influence of cantilever tilting support Pile deformation and stress law, and the results obtained with the traditional vertical supporting pile force characteristics were compared. The results show that: the horizontal displacement of pile top of inclined support pile is obviously smaller than that of traditional vertical support pile, the anti-overturning capacity of support pile is improved; the lateral displacement curve of pile body is relatively gentle, and the main rigid displacement of pile body is relatively straight Pile supporting forms reduce the possibility of stress concentration; pile bending moment distribution more uniform, positive and negative bending moment peak, compared with the traditional straight pile support form, make fuller use of the pile material strength, Has a significant engineering application value and economic benefits.