用土工织物提高软土地基承载力的离心模型荷载试验

A CENTRIFUGE TEST ON USING GEOTEXTILE TO INCREASE THE BEARING CAPACITY OF SOFT CLAY FOUNDATION

为了确定地基承载力通常需要进行现场荷载板试验取得荷载——沉降曲线,试验时间长且费用高。本文结合深圳机场飞行区现场地基荷载板加荷试验,介绍了国内首次采用室内离心模型模拟地基承载力稳定性态的试验及试验加载装置,并与现场试验所得结果进行了比较。通过试验,认为该法比现在人们常用的荷载板室内、室外试验更方便,时间短,费用低。试验工作得出了一些有意义的结论。

Field tests are usually conducted so as to obtain the load-settlement curve and to determine the bearing capacity. However, field tests are often time-consuming and costly. In this paper the following are introduced: (1) The results of a centrifuge model test on a centrifuge machine of the Yangtze River Scientific Research Institute, and the comparison between the test results and the results from the field tests conducted at an airport.(2)The equipment for performing the bearing capacity test on a centrifuge machine. It is for the first time in China that the load-settlement curve of geotextile is determined from the centrifuge test. Compared with field tests, the present test is more convenient, cheaper and less time consuming.