静钻根植竹节桩在软土地基中的应用及其承载力计算

发布时间：2018-07-15 07:46

【摘要】：静钻根植竹节桩具有承载性能好,技术含量高和环保等优点,在中国东南沿海软土地区的初步应用中,其相比灌注桩工程造价能减小10%左右,并且静钻根植工法的使用使得泥浆排放量大量减少。通过对竹节桩试桩数据分析发现,在相同土层中,竹节桩的桩侧摩阻力是灌注桩桩侧摩阻力的1.05~1.10倍,而竹节桩桩端阻力的计算可以采用预制管桩桩端土极限承载力值乘以折减系数的方式。在对现场竹节桩试桩数据分析的基础上,结合日本关于竹节桩的相关文献与规范,推导出一个竹节桩极限承载力的简化计算公式。最后将提出的竹节桩极限承载力计算公式对2个工程中竹节桩试桩的极限承载力进行计算,并与实测结果相比较发现,计算所得承载力极限值与现场实测值相接近,该竹节桩承载力计算公式对实际工程有一定的帮助。
[Abstract]:Static drilling root planting bamboo section pile has the advantages of good bearing capacity, high technology content and environmental protection. In the initial application of this pile in the soft soil area along the southeast coast of China, its construction cost can be reduced by about 10% compared with that of the cast-in-place pile project. And the use of static drilling and root-planting method to reduce the amount of mud emissions. Through the analysis of the pile test data, it is found that in the same soil layer, the pile side friction of the bamboo section pile is 1.05or 1.10 times that of the cast-in-place pile. The ultimate bearing capacity of prefabricated pipe piles can be calculated by multiplying the reduction coefficient. On the basis of the analysis of the field test pile data, a simplified formula for calculating the ultimate bearing capacity of the slub pile is derived in combination with the relevant documents and specifications of Japan. Finally, the calculation formula of ultimate bearing capacity of slub pile is put forward to calculate the ultimate bearing capacity of the test pile in two projects, and compared with the measured results, it is found that the calculated ultimate value of bearing capacity is close to the field measured value. The calculation formula of bearing capacity of slub pile is helpful to practical engineering.
【作者单位】：浙江大学滨海和城市岩土工程研究中心;浙东建材集团;
【分类号】：TU473.11

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