大面积带垫层刚性桩复合地基的荷载传递分析方法 English Version
Analysis on load transfer for large area composite foundation with rigid piles and cushions
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摘要: 提出了用迭代法分析带垫层刚性桩复合地基荷载传递特性计算方法。将大规模群桩复合地基中的任意一根桩及其周围的桩间土看作一个存在相互作用力的柱杆系统,单个柱杆用荷载传递法分析,柱杆之间的相互影响用迭代法分析。该方法可方便地考虑桩、土、承台和垫层的相互作用,地基土的分层特性和桩身荷载传递函数的非线性。通过实例验证了本文方法的正确性,讨论了桩土应力比随垫层厚度、垫层模量、桩间距和桩间土模量等因素的变化规律。Abstract: A method to analyze load transfer was presented for composite-foundation with rigid pile and cushion by means of iterative process.A single pile with surrounding soil in large scale pile group was taken as a column system with interaction force.A single pile was analyzed by load transfer method,while interaction was analyzed by iterative process.The pile-soil-cushion-cap interaction and the nonlinearity of load transfer for layered soil could be considered conveniently in this method.The correctness of this method was validated by a practical example.Factors influencing the stress ratio of the pile and soil were studied including the cushion thickness,cushion modulus,pile spacing,soil modulus,etc.
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Keywords:
- rigid pile composite ground /
- cushion /
- load transfer /
- stress ratio /
- negative skin friction
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