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本文通过对螺旋板载荷试验曲线上起始压力的分析,指出了把起始压力当作土的垂直自重压力这一习惯概念在逻辑上的矛盾与错误。作者通过对一个等效的数学模型的推导,得到了有关起始压力的理论关系。并相应提出了在螺旋板载荷试验的压力沉降曲线上,区别与确定起始压力和试验初始状态压力的方法,就它与垂直自重压力的关系等问题,结合现场试验资料作了讨论。
Based on the analysis of the initial pressure on the spiral load test curve, this paper points out the logical contradiction and error of the customary concept of using the initial pressure as the vertical self-weight of the soil. By deriving an equivalent mathematical model, the author obtains the theoretical relationship of the initial pressure. Correspondingly, the method of discriminating and determining the initial pressure and the initial state pressure in the pressure settlement curve of the spiral plate load test was put forward. The relationship between it and the vertical self-weight pressure was discussed in connection with the field test data.