旁孔透射波法检测既有建筑物桩基的三维有限元分析  

3D finite element analysis of parallel seismic tests for integrity of piles of existing structures

作　　者：黄大治[1] 陈龙珠[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院安全与防灾工程研究所,上海200240

出　　处：《岩土力学》2008年第6期1569-1574,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50478022)

摘　　要：介绍了旁孔透射波法的原理和测试步骤,对这种无损检测方法在既有建筑物桩基础检测中的应用进行了三维有限元分析。建立了三维桩-土模型并计算动力响应,分别给出了饱和土、非饱和土地基中完整桩和缺陷桩的旁孔透射波信号,并分析了P波时间-深度特征与桩身的相关性。研究表明,旁孔透射波法具有简单易行、无损等优点,可以有效地检测既有建筑物的基础。The principle and process of the parallel seismic for the integrity of piles of existing structures is introduced.A 3D finite element model for the pile-soil system is established for impulse responses.Under saturated soil or unsaturated soil condition,some vibrating velocity-time histories at different depths in the parallel hole are obtained with the numerical model.It is shown that the length and 1D P-wave velocity of a pile are easy to determine from the features of the mentioned velocity-time histories.Results indicated that the PS method is a new suitable nondestructive test to evaluate the integrity of piles of existing structures.

关 键 词：旁孔透射波法 既有建筑物 桩 三维有限元方法 无损检测 

分 类 号：TU473[建筑科学—结构工程]