Study on estimation of Long-term settlement of a Piled building at reclaimed land in Osaka

作者观察了大阪填海土地上的一堆建筑的长期沉降。结果表明，桩端已逐渐渗透到桩的承载层中。并利用粘弹塑性模型对这一现象进行了分析。在本研究中，作者试图澄清粘弹塑性模型常数的物理意义。采用模型砂石地基进行了模型试验。模型地面是用粉笔堆成的。通过这些模型试验的结果，笔者发现砂粒的弹性变形和位移引起的瞬时弹性沉降、砂粒的位移引起的瞬时塑性沉降、砂粒的粘弹性变形引起的粘弹性沉降和砂粒的碰撞和位移引起的粘塑性沉降。本研究的另一个目的是利用标准贯入试验数据估算桩的长期沉降。但它没能实施。因此，利用锥入试验数据对其进行了估计。

The author observed long-term settlement of a piled building at reclaimed land in Osaka. As the results, the author found that the pile-tip had been Penetrating into its bearing layer. And the author analized this phenomena by visco-elasto plastic model. In this study the author intended to clear the physical meaning of the constants of visco-elasto plastic model.Model tests were carried out by using the model sand and gravel ground. Model ground were constructed by piling up many chalks. As the results of these model tests, the author found that instantaneous elastic settlement caused by elastic deformation and displacement of sand particles, instantaneous plastic settlement caused by displacement of sand particles, visco elastic settlement caused by visco elastic deformation of sand particles and visco plastic settlement caused by clash and displacement of sand particles.Another Purpose of this study was estimating the long-term settlement of pile by using the data of standard penetration test. But it was not able to carry out. So its estimation was carried out by using the data of cone penetration test.