An investigation on interaction between liquefied soil and pile foundation during earthquake

地震作用下液化土与桩基相互作用研究

• 批准号: 08650570
• 负责人: TAKEMURA Jiro
• 金额: $ 1.47万
• 依托单位: Tokyo Institute of Technoloty
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650570/
• 关键词: liquefaction; model test; sand; pile foundation; earthquake; 裏込め; 杭基礎; 動的

There had been very few records on damages of steel pile type piers. in previous earthquakes. However, several piers located in front of gravity caissons were damaged during the 1995 Hyogoken-Nambu Earthquake. Damage of piles at the site suggested that the lateral flow of the ground might accelerate the failure of the pier. In this study, centrifuge tests were firstly carried out to simulate dynamic behavior and failure of a steel pile type pier damaged in 1995 Hyogoken-Nambu Earthquake. And also some tests with different ground conditions were conducted to discuss the effects of liquefaction of the sand layer under the rubble mound on the lateral flow of the ground and the effect of the approaching plate connecting gravity caisson to ther pier on the dynamic interaction between the two structures.

钢桩式桥墩损坏的记录很少。在以往的地震中。然而，位于重力沉箱前面的几个桥墩在 1995 年兵库县南部地震中受损。现场桩的损坏表明地面的侧向流动可能会加速桥墩的破坏。在这项研究中，首先进行了离心机试验来模拟 1995 年兵库县南部地震中受损的钢桩型桥墩的动态行为和破坏。并进行了不同地基条件下的试验，探讨了堆石丘下砂层液化对地面侧向流的影响以及重力沉箱与桥墩连接的趋近板对地基动力相互作用的影响。两种结构。