【摘要】 基于桩基竖向承载力自平衡测试原理，旨在探索一种新的水平向自平衡试验方法。p-y曲线法能较为客观地反映水平受荷桩的承载变形性状，利用模型试验在黏土中分别使用自平衡法加载以及传统静载荷加载，从而得到自平衡试桩桩侧极限土抗力p_u与埋深z的关系，以及两种试桩桩身位移y与埋深z的关系。为了考虑自平衡试桩与传统试桩之间桩身位移的相关性，简化近似桩身位移曲线y(z)并提出桩身位移的特征值。研究发现，同一土体中桩侧极限土抗力p_u与埋深z基本线性相关，自平衡试桩与传统试桩桩身位移的特征值转化考虑桩土相互作用下影响因素的权值并据此进行换算。通过换算系数，可进行水平自平衡的简化计算和精确计算。结果表明，利用自平衡法计算的桩基水平承载力与传统静载荷试验值相近，说明自平衡法确定水平承载力是有效的。更多还原

【Abstract】 This study introduces the principle of self-balancing test for the assessment of the lateral capacity of piles. It establishes the loading pattern and the lateral capacity estimation method using a horizontal self-balancing test method. The p-y curve method can objectively reflect the deformation characteristics of the horizontally loaded pile. The corresponding test results are obtained by using the model test of the self-balancing pile and the traditional horizontal static load pile loaded by the self-balancing method and the traditional static load loading, respectively, so as to obtain the relationship between the ultimate soil resistance P_U on the side of the self-balancing test pile and the buried depth z, the relationship between the displacement y of the two test piles and the buried depth z. To consider the correlation between the displacement of the self-balancing pile test and the traditional pile test, the approximate pile displacement curve y(z) is simplified, and the eigenvalue of the pile displacement is proposed. It is found that the ultimate soil resistance P_U on the pile side in the same soil is basically linearly correlated with the buried depth z, and the eigenvalue of the displacement of the self-balancing test pile and the traditional test pile is converted into the weights of the influencing factors under the interaction between pile and soil, and is converted accordingly. By converting the coefficients, it is possible to perform simplified and accurate calculations of horizontal self-balancing. The results show that the horizontal bearing capacity of the pile foundation calculated by the self-balancing method is similar to the traditional static load test value, indicating that the self-balancing method is effective in determining the lateral capacity.更多还原