室内土工模型试验的新方法──桩基渗水力土工模型试验  

A NEW INDOOR MODEL TEST OF SOIL -THE HYDRAULIC GRADIENT SIMILITUDE MODEL TEST FOR PILED FOUNDATION

作　　者：方磊[1] 李广信[2] 黄锋[2] 

机构地区：[1]南京交通高等专科学校 [2]清华大学水利水电工程系

出　　处：《高校地质学报》1997年第4期451-457,共7页Geological Journal of China Universities

基　　金：交通部1996年交通高等教育专项基金

摘　　要：本文通过桩基渗水力土工模型试验实例，介绍了一种新的室内土工模型试验方法──渗水力土工模型试验。它利用水在土体中的渗流来提供土工模型试验中必须的体积力，因而克服了常规模型试验和离心机模型试验中的一些缺陷。该方法在桩基研究及工程实际中具有良好的应用前景。Similitude model test is very important in geotechnics research. But conventional gravity field of ig model test fails to reach the prototype stress level, because the stressstrain behavior of soil depends on its level of effective stress. Centrifugal model can provide high body force, so it is used widely in geotechnics, although it has some drawbacks. In this paper, a new model test of soil, the hydraulic gradient similitude (seepage force) model, is introduced through a pile's seepage force model test. The seepage force model employs a high body force, hence the high stress levels approaching field conditions can be reproduced.It overcomes some failing in conventional model and centrifugal model of getechnics. So it is very useful in studying the piled foundation and other practice in geotechnical engineering.

关 键 词：渗水力 模型试验 桩基 体积力 土工模型验 

分 类 号：TU473.16[建筑科学—结构工程] TU411.4[建筑科学—土工工程]