对桩周土弹性模量确定方法的探讨

摘要

Based on the comprehensive analys is of currently used threemethods for calculating soil modulus in pile foundation I.e., laboratory test, empirical correlation based on previous ex perience and back-figuring method from pile-loading test, a new simple approa ch to compute soil modulus by back analysis from single pile load-settlement curve is put forward, and charts and formulas are also presented for practical engine ering use. Practical example analysis shows that the soil modulus obtained by back analysis from single pile load curve should be used as the parameter for calc ulating when elastic theory is employed to calculate the pile groups settlement.%综合分析了目前确定桩基础土弹性模量的3种方法：室内试验方法、基于过去工程实践的经验关系的方法及由单桩的荷载试验曲线反算的方法，提出了一种利用单桩荷载-沉降曲线确定土弹性模量的简单方法，并给出了计算公式和图表供工程实际应用。通过实例分析表明，弹性理论法计算桩基础沉降时，应该用单桩荷载试验曲线反算方法得到的土弹性模量作为计算参数。