切线模量法在单桩非线性沉降计算中的应用

摘要

为了更好地计算单桩的非线性沉降，结合规范方法将单桩沉降分为桩身压缩和桩端土沉降两部分，其中桩端土沉降采用切线模量法计算，由于切线模量是由原位试验得到，能反映桩端土的原状特性，同时切线模量考虑了不同应力水平的影响，因此也能够反映桩端土沉降的非线性。通过工程实例应用表明，切线模量法用于单桩非线性沉降计算是可行的。%In order to better calculate the nonlinear settlement of single pile , a method is presented in this paper , in which the settlement of single pile is divided into the compression of pile and the settlement of pile end soil according to the standard method , and the settlement of pile end soil is calculated by tangent modulus method .The tangent modulus is obtained by in -situ test, so the characteristic of the undisturbed pile end soil can be reflected .What is more , the effects of different stress level is considered by the tangent modulus , so the nonlinearity of settlement of pile end soil can be also reflected .Through the engineering example , it is indicated that using the tangent modulus method to calculate the nonlinear settlement of single pile is feasible .