Application of cone penetration test in estimating the sinking resistance of static pressure pile
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摘要: 静压法沉桩是一种高效的深基础施工技术，在城市中心建筑及基础设施建设中发挥着重要作用。静压法沉桩过程中沉桩阻力的预测对提高桩基施工质量、提升施工效率及降低基础施工成本具有重要意义。基于双桥静力触探试验及静压桩施工原理的相似性，引入侧摩阻力动静转换系数k以及桩侧、桩端综合调节系数γ1、γ 2，建立了基于双桥静力触探法的静压桩沉桩阻力预测函数式，并对计算参数进行了识别。通过实际工程案例的对比分析，验证了该模型的准确性和实用性。结果表明，基于CPT数据的沉桩阻力估算方法能够有效地预测不同土层条件下的沉桩阻力，为静压桩施工提供了可靠的技术支撑。Abstract: Static pressure pile driving is an efficient deep foundation construction technology that plays an important role in the construction of urban central buildings and infrastructure.The prediction of pile driving resistance during static pressure pile driving is of great significance for improving the quality of pile foundation construction,improving construction efficiency,and reducing foundation construction costs.This article is based on the similarity between the cone penetration test and the construction principle of static pressure piles,introducing the dynamic static conversion coefficient k of lateral friction resistance and the comprehensive adjustment coefficientsγ1 and γ 2 of pile side and pile end,a predictive function formula for the resistance of static pressure pile sinking based on the cone penetration test method was established,and the calculation parameters were identified.The accuracy and practicality of the model were verified through comparative analysis of actual engineering cases.The results indicate that the estimation method of pile driving resistance based on CPT data can effectively predict the pile driving resistance under different soil conditions,providing reliable technical support for static pressure pile construction.
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