论文部分内容阅读
针对路堤荷载下水平加筋体与散体材料桩复合地基的极限承载力计算问题,分析了水平加筋体、路堤和地基之间的相互作用,得到了三者的作用力关系以及速度关系;研究了散体材料桩对地基承载力的影响,得到了考虑桩体置换率、地基土固结度影响的复合地基土体强度指标的计算公式;根据极限分析理论,从能量平衡角度推导出了地基极限承载力计算公式;对实际路堤工程设计计算进行了研究,搜索出最危险滑动面以及路堤极限高度。最后,通过工程实例,对比了路堤极限高度计算值和实测值,并分析了筋材极限强度发挥系数、固结度等因素对地基极限承载力的影响。结果表明:计算值与实际情况很接近,结果较为理想。
Aiming at the calculation of the ultimate bearing capacity of the horizontal reinforcement body and the composite pile foundation under the embankment load, the interaction between the horizontal reinforcement body, embankment and foundation is analyzed and the force relationship and the velocity relationship are obtained. The effect of the pile with loose material on the bearing capacity of the foundation is studied. The calculation formula for the strength index of the composite foundation considering the replacement ratio of the pile and the consolidation degree of the foundation soil is obtained. According to the limit analysis theory, The calculation formula of the ultimate bearing capacity of the foundation; the design calculation of the actual embankment engineering has been studied, and the most dangerous slip surface and the ultimate height of the embankment have been searched out. Finally, through the engineering examples, the calculated and measured values of the ultimate height of embankment are contrasted, and the influence of factors such as ultimate strength of tendons on the ultimate bearing capacity of foundation is analyzed. The results show that the calculated value is very close to the actual situation and the result is satisfactory.