A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests
It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water leve...
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| Autor*in: |
Wang, H [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Rechteinformationen: |
Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. |
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| Übergeordnetes Werk: |
Enthalten in: Geotechnical testing journal - Philadelphia, Pa. : ASTM, 1978, 39(2016), 4, Seite 532-542 |
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| Übergeordnetes Werk: |
volume:39 ; year:2016 ; number:4 ; pages:532-542 |
| Links: |
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| DOI / URN: |
10.1520/GTJ20150125 |
|---|
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OLC1980217521 |
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| 520 | |a It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. | ||
| 540 | |a Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. | ||
| 700 | 1 | |a Sato, T |4 oth | |
| 700 | 1 | |a Koseki, J |4 oth | |
| 700 | 1 | |a Chiaro, G |4 oth | |
| 700 | 1 | |a Tan Tian, J |4 oth | |
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10.1520/GTJ20150125 doi PQ20161201 (DE-627)OLC1980217521 (DE-599)GBVOLC1980217521 (PRQ)a852-8d1f928cdb131c718c68b6c4018a115cb0723966374880cf366b894643b10a720 (KEY)0091196820160000039000400532systemtomeasurevolumechangeofunsaturatedsoilsinund DE-627 ger DE-627 rakwb eng 690 DNB Wang, H verfasserin aut A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. Sato, T oth Koseki, J oth Chiaro, G oth Tan Tian, J oth Enthalten in Geotechnical testing journal Philadelphia, Pa. : ASTM, 1978 39(2016), 4, Seite 532-542 (DE-627)129616990 (DE-600)244239-5 (DE-576)015115712 0149-6115 nnns volume:39 year:2016 number:4 pages:532-542 http://dx.doi.org/10.1520/GTJ20150125 Volltext http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/PAGES/GTJ20150125.htm GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4317 AR 39 2016 4 532-542 |
| spelling |
10.1520/GTJ20150125 doi PQ20161201 (DE-627)OLC1980217521 (DE-599)GBVOLC1980217521 (PRQ)a852-8d1f928cdb131c718c68b6c4018a115cb0723966374880cf366b894643b10a720 (KEY)0091196820160000039000400532systemtomeasurevolumechangeofunsaturatedsoilsinund DE-627 ger DE-627 rakwb eng 690 DNB Wang, H verfasserin aut A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. Sato, T oth Koseki, J oth Chiaro, G oth Tan Tian, J oth Enthalten in Geotechnical testing journal Philadelphia, Pa. : ASTM, 1978 39(2016), 4, Seite 532-542 (DE-627)129616990 (DE-600)244239-5 (DE-576)015115712 0149-6115 nnns volume:39 year:2016 number:4 pages:532-542 http://dx.doi.org/10.1520/GTJ20150125 Volltext http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/PAGES/GTJ20150125.htm GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4317 AR 39 2016 4 532-542 |
| allfields_unstemmed |
10.1520/GTJ20150125 doi PQ20161201 (DE-627)OLC1980217521 (DE-599)GBVOLC1980217521 (PRQ)a852-8d1f928cdb131c718c68b6c4018a115cb0723966374880cf366b894643b10a720 (KEY)0091196820160000039000400532systemtomeasurevolumechangeofunsaturatedsoilsinund DE-627 ger DE-627 rakwb eng 690 DNB Wang, H verfasserin aut A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. Sato, T oth Koseki, J oth Chiaro, G oth Tan Tian, J oth Enthalten in Geotechnical testing journal Philadelphia, Pa. : ASTM, 1978 39(2016), 4, Seite 532-542 (DE-627)129616990 (DE-600)244239-5 (DE-576)015115712 0149-6115 nnns volume:39 year:2016 number:4 pages:532-542 http://dx.doi.org/10.1520/GTJ20150125 Volltext http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/PAGES/GTJ20150125.htm GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4317 AR 39 2016 4 532-542 |
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10.1520/GTJ20150125 doi PQ20161201 (DE-627)OLC1980217521 (DE-599)GBVOLC1980217521 (PRQ)a852-8d1f928cdb131c718c68b6c4018a115cb0723966374880cf366b894643b10a720 (KEY)0091196820160000039000400532systemtomeasurevolumechangeofunsaturatedsoilsinund DE-627 ger DE-627 rakwb eng 690 DNB Wang, H verfasserin aut A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. Sato, T oth Koseki, J oth Chiaro, G oth Tan Tian, J oth Enthalten in Geotechnical testing journal Philadelphia, Pa. : ASTM, 1978 39(2016), 4, Seite 532-542 (DE-627)129616990 (DE-600)244239-5 (DE-576)015115712 0149-6115 nnns volume:39 year:2016 number:4 pages:532-542 http://dx.doi.org/10.1520/GTJ20150125 Volltext http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/PAGES/GTJ20150125.htm GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4317 AR 39 2016 4 532-542 |
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10.1520/GTJ20150125 doi PQ20161201 (DE-627)OLC1980217521 (DE-599)GBVOLC1980217521 (PRQ)a852-8d1f928cdb131c718c68b6c4018a115cb0723966374880cf366b894643b10a720 (KEY)0091196820160000039000400532systemtomeasurevolumechangeofunsaturatedsoilsinund DE-627 ger DE-627 rakwb eng 690 DNB Wang, H verfasserin aut A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. Nutzungsrecht: © 2016 ASTM International All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher. Sato, T oth Koseki, J oth Chiaro, G oth Tan Tian, J oth Enthalten in Geotechnical testing journal Philadelphia, Pa. : ASTM, 1978 39(2016), 4, Seite 532-542 (DE-627)129616990 (DE-600)244239-5 (DE-576)015115712 0149-6115 nnns volume:39 year:2016 number:4 pages:532-542 http://dx.doi.org/10.1520/GTJ20150125 Volltext http://www.astm.org/DIGITAL_LIBRARY/JOURNALS/GEOTECH/PAGES/GTJ20150125.htm GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4317 AR 39 2016 4 532-542 |
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In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system.</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2016 ASTM International All rights reserved. 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system to measure volume change of unsaturated soils in undrained cyclic triaxial tests |
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A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests |
| abstract |
It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. |
| abstractGer |
It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. |
| abstract_unstemmed |
It is common to employ a traditional double cell system, of which an open-ended inner cell is installed in an ordinary triaxial apparatus, to measure the volume change of unsaturated specimens. In such a system, the total apparent volumetric strain of the specimen (εv) is deduced from the water level change in the inner cell, monitored by a differential pressure transducer (DPT) considering, meanwhile, the top cap intrusion into the inner cell recorded by a vertical displacement transducer (VDT). Severe apparent volumetric strain, caused by the compliance of the double cell system (εv,SC), was observed during the undrained cyclic loading tests in a previous study. Test results on a steel-spring dummy specimen revealed that εv,SC was induced not only by such as the meniscus effect, but unexpectedly also by the asynchronous responses between the DPT and the VDT (i.e., the response of the DPT was delayed compared with that of the VDT). By doing some treatment εv,SC could be reduced to some extent, whereas the magnitude of εv,SC was still too high to be acceptable when the tested specimen approached the liquefied state. To radically solve these technical difficulties, a modified double cell system, named the linkage double cell system, was developed in this study. In this modified system, a linkage rod moving simultaneously with the loading shaft was introduced, through which the DPT could directly measure εv without considering the top cap or loading shaft intrusion. Test results for the steel-spring dummy specimen as well as for saturated and unsaturated soil specimens demonstrated that the linkage double cell system has major advantages in measuring accurately the volume change of the specimen during undrained cyclic triaxial loading tests compared with the traditional double cell system. |
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A System to Measure Volume Change of Unsaturated Soils in Undrained Cyclic Triaxial Tests |
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