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在有限元分析的基础上,采用三维Mohr-Coulomb非线性弹塑性模型对嵌岩方桩垂直荷载作用下的承载性状做了较全面的探讨。计算结果表明,随着嵌岩深度的增加,嵌岩方桩的极限承载力也逐渐增加,当嵌岩深度超过h/B=3.0后,方桩的承载力变化不大。随着嵌岩桩岩石弹性模量和内摩擦角的增大,嵌岩方桩的极限承载力也随之增加。文中结论可为方形桩基工程的科研、设计和施工提供参考。
Based on the finite element analysis, the three-dimensional Mohr-Coulomb nonlinear elastic-plastic model is used to investigate the bearing behavior under the vertical loading of rock-socketed piles. The calculation results show that the ultimate bearing capacity of the rock-socketed square piles also gradually increases with the socketed depth increasing. When the socketed depth exceeds h / B = 3.0, the bearing capacity of the square piles has little change. With the increase of rock elastic modulus and internal friction angle of rock-socketed piles, the ultimate bearing capacity of rock-socketed square piles also increases. The conclusions in this paper can provide references for the research, design and construction of square pile foundation engineering.