Measuring radial total stresses on model suction caissons in clay

被引：0

作者：

Centre for Offshore Foundation Systems, School of Civil & Resource Engineering, The University of Western Australia, Australia ^{[1
]}

不详 ^{[2
]}

6009, Australia

机构：

[1] Centre for Offshore Foundation Systems, School of Civil and Resource Engineering, University of Western Australia

[2] Centre for Offshore Foundation Systems, University of Western Australia, Perth

来源：

Geotech. Test. J. | 2006年 / 2卷 / 124-132期

基金：

澳大利亚研究理事会;

关键词：

Centrifuge; Clay; Radial stress; Suction caisson; Total pressure transducer;

D O I：

10.1520/gtj100262

中图分类号：

学科分类号：

摘要：

Miniature total pressure transducers (TPTs) were ncorporated on model suction caissons in order to measure changes in radial stress during installation and loading of the aissons. The accuracy of TPTs in clay was first assessed by calibration tests at both 1g and in a geotechnical centrifuge at up to 120g. Calibration tests in a modified triaxial apparatus showed that the accuracy of the TPTs under loading, unloading, cyclic loading, and sustained loading was better than 92.5%. The initial readings of the TPTs were also found to change only slightly on transfer among air, water, and soil, in spite of differences in the heat exchange environment. The cross-sensitivity of TPTs to an axial load of 300 N on the caisson was insignificant. The accuracy of TPTs in water in the centrifuge was better than 96 %. The TPTs also gave reasonable measurements of radial stresses generated on the outer wall of suction caissons during penetration in clay at 120g, as assessed by comparison with stress changes predicted using the strain path method. Copyright © 2007 by ASTM International.

引用

页码：124 / 132

页数：8

共 21 条

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