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本文是根据在华南地区的几次试桩成果写成的。 当桩承受荷载时,通过予埋在桩内的电测元件,可以测定桩身各量测截面的应变,从而计算桩侧摩阻力、桩尖阻力随位移变化的关系,即桩的荷载传递曲线(τ-S曲线、P_b-S_b曲线)。实测的荷载传递曲线可近似地用双曲线方程来描述。从实用的目的来讨论,可将τ-S曲线简化为弹性-全塑模型,P_b-S_b曲线则简化为弹性-硬化模型,并用五个参数λ,S_u,K_1,K_2和S_(bu)来表示桩侧,桩尖土的荷载传递规律。 用荷载传递方法,本文提出了用“桩尖位移等值法”,来计算桩的荷载-沉降曲线,并将用该法计算的P-S曲线与现场实测的数据进行对比,结果是吻合的。
This article is based on the results of several test piles in South China. When the pile bears the load, the measured strain of the pile body can be measured by the electrical measuring element buried in the pile, so as to calculate the relationship between pile side friction resistance and pile tip resistance with displacement change, that is, the pile load transfer curve. (τ-S curve, P_b-S_b curve). The measured load transfer curve can be approximately described by a hyperbolic equation. For practical purposes, the τ-S curve can be simplified as an elastic-all-plastic model, and the P_b-S_b curve is simplified as an elastic-hardening model, with five parameters λ, S_u, K_1, K_2, and S_(bu). Indicates the load transfer law of pile side and pile tip soil. Using load transfer method, this paper proposes to use pile tip displacement equivalent method to calculate the load-settlement curve of the pile, and compares the P-S curve calculated by this method with the field measured data, and the results are consistent.