A New Estimation Method for Penetration Depth of Displacement Pile Based on a New Type Cone Penetration Test
A New Estimation Method for Penetration Depth of Displacement Pile Based on a New Type Cone Penetration Test
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DOI：
10.4028/www.scientific.net/amm.90-93.234
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
Zhi Zhong Li;L. Tang;Yongqiang Hu;Zhao Yuan Li;P. Lin
中科院分区：
文献类型：
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作者：
Zhi Zhong Li;L. Tang;Yongqiang Hu;Zhao Yuan Li;P. Lin
准确预测一定压力下挤扩桩的贯入深度对桩基设计和施工具有重要意义。通过增加仪器重量、提高探杆和探头强度、增加总贯入阻力测量功能等措施，研制了一种新型的圆锥贯入阻力计及相应的勘探方法。不仅适用于除卵石层以外的各种地层，还具有确定总贯入阻力、土层分类、计算土的压缩模量和动静摩擦比等功能。采用新型锥形贯入仪测量了桩的总贯入阻力、静点阻力和侧摩阻力，引入了一个新的动静摩阻力比系数，并将其用于计算动侧摩阻力，建立并提出了一种考虑动侧摩阻力影响的位移桩贯入深度估算方法。通过桩工程实例验证了该方法的有效性，结果表明，该方法具有较高的精度，具有一定的理论和实践意义，具有推广价值。
It is of significance for pile foundation design and construction to predict the penetration depth accurately of the displacement pile under a fixed pressure. A new type cone penetrometer and corresponding exploration methods are developed through increasing weight of the device, enhancing the strength of probing rod and probe, and embedding a new function on measuring the total penetration resistance. Not only applied appropriately to various strata except for pebble bed, functions such as the total penetration resistance determination, soil layer classification and soil compression modulus and dynamic-static friction ratio calculation are also provided. Data of total penetration resistance, static point resistance and side friction are measured with the new type cone penetrometer, a new coefficient of dynamic-static friction ratio is introduced and employed to calculate the dynamic side friction, a new estimation method, with which the influence of dynamic side friction is take into account, on penetration depth evaluation of the displacement pile is established and proposed subsequently. Validity of the new method is verified by means of case study of pile engineering and the results indicate, for its high accuracy, the method proposed is of practice and theoretical significance, as well as valuable for popularization.