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针对中国西部山区复杂工程地质条件下施工与运营过程中,陡坡桥梁桩柱承受复杂荷载作用的受力特点,首先阐述了陡坡地段常用嵌岩桩的抗滑性能及影响桩侧摩阻力与桩端阻力发挥的多种因素,着重从室内模型试验和现场试验研究及计算机数值模拟分析等方面讨论了其水平承载性状的理论计算方法与在复杂荷载条件下的应力分布与变形性状,并研究了嵌固深度的计算方法;其次对多数学者认可的陡坡双桩柱的门式框架计算模型进行了探讨,该模型争议较多问题是岩(土)体的压力分布问题;再者对长桩屈曲、桩柱高墩的稳定性与桩基陡坡的稳定性等已有的研究成果进行了分析;最后指出了山区陡坡地段桩柱需要进行深入研究的一些问题,为其工程设计与理论计算的研究及试验发展提供参考。
In the process of construction and operation of complex engineering geology in the mountainous area of western China, the stress characteristics of steep slope piles subjected to complex loads are described. Firstly, the anti-skid performance of pile-socketed piles in steep slopes and the relationship between pile-side frictional resistance and pile tip The factors that play a role in resistance are discussed. The theoretical calculation method of horizontal bearing behavior and the stress distribution and deformation under horizontal load are discussed from the aspects of indoor model test, field test, computer numerical simulation and so on. Depth calculation method. Secondly, the calculation model of portal framework for steep slopes and double piles recognized by most scholars is discussed. The most controversial issue of this model is the pressure distribution of rock and soil. Furthermore, The stability of piled high piers and the stability of pile steep slopes are analyzed. Finally, some problems that need to be studied in depth for steep slopes in mountainous areas are pointed out. In addition, some problems about the engineering design and theoretical calculation and Experimental development for reference.