Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China
More than 40% area of the Xixian New Area is a loess deposit region, and most of the loess landform is tableland and terrace where the thickness of loess is very large. Therefore, loess collapsibility will be the most important geotechnical problem in future foundation investigation and construction...
- Autores:
-
Wang, Jiading
Ma, Yan
Guo, Qianyi
Chu, Di
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2017
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/63570
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/63570
http://bdigital.unal.edu.co/64016/
- Palabra clave:
- 55 Ciencias de la tierra / Earth sciences and geology
Xixian New Area
loess collapsibility
wetting
pressure
initial collapse water content
Distrito especial de Xixian (China)
colapsabilidad de loess
humectación
presión
contenido de agua incial de colapso.
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
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dc.title.spa.fl_str_mv |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
title |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
spellingShingle |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China 55 Ciencias de la tierra / Earth sciences and geology Xixian New Area loess collapsibility wetting pressure initial collapse water content Distrito especial de Xixian (China) colapsabilidad de loess humectación presión contenido de agua incial de colapso. |
title_short |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
title_full |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
title_fullStr |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
title_full_unstemmed |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
title_sort |
Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China |
dc.creator.fl_str_mv |
Wang, Jiading Ma, Yan Guo, Qianyi Chu, Di |
dc.contributor.author.spa.fl_str_mv |
Wang, Jiading Ma, Yan Guo, Qianyi Chu, Di |
dc.subject.ddc.spa.fl_str_mv |
55 Ciencias de la tierra / Earth sciences and geology |
topic |
55 Ciencias de la tierra / Earth sciences and geology Xixian New Area loess collapsibility wetting pressure initial collapse water content Distrito especial de Xixian (China) colapsabilidad de loess humectación presión contenido de agua incial de colapso. |
dc.subject.proposal.spa.fl_str_mv |
Xixian New Area loess collapsibility wetting pressure initial collapse water content Distrito especial de Xixian (China) colapsabilidad de loess humectación presión contenido de agua incial de colapso. |
description |
More than 40% area of the Xixian New Area is a loess deposit region, and most of the loess landform is tableland and terrace where the thickness of loess is very large. Therefore, loess collapsibility will be the most important geotechnical problem in future foundation investigation and construction. To explore loess collapsibility in the Xixian New Area, we conducted the K0 compression test, based on the collapsibility mechanism, which has different combinations of pressure (0~1.2 MPa) and water content (4%~Sat). Based on the σ-ε curve under different water content, we calculated the generalised collapse settlement and collapsibility coefficient of every water content under every pressure by subtracting the relevant curve from the saturated curve, and analysed the cross action of pressure and water on loess compressibility. The results show that the average collapsibility level of the northern Xixian New Area is self-weight collapsible level Ⅱ, with a lower limit of 14 m. Compressibility of loess is proportional to pressure and water content. Under low water content, the collapsibility coefficient δs increased while the pressure increased, but under medium and high water content, δs will reach peak with increasing pressure and after that, δs will decrease until its value is close to constant. When under the same pressure, δs decreases when water content increases. If set the additional strain 1.5% as collapse start criterion, then the initial collapse pressure Pi will linear proportional to water content. The initial collapse water content wi will increase sharply when pressure increases under low pressure, but wi will reach a constant value of 26% when pressure is larger than 200 kPa. This consequence will be meaningful for future geotechnical investigation and design in the Xixian New Area. |
publishDate |
2017 |
dc.date.issued.spa.fl_str_mv |
2017-10-01 |
dc.date.accessioned.spa.fl_str_mv |
2019-07-02T21:54:38Z |
dc.date.available.spa.fl_str_mv |
2019-07-02T21:54:38Z |
dc.type.spa.fl_str_mv |
Artículo de revista |
dc.type.coar.fl_str_mv |
http://purl.org/coar/resource_type/c_2df8fbb1 |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_6501 |
dc.type.coarversion.spa.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
dc.type.content.spa.fl_str_mv |
Text |
dc.type.redcol.spa.fl_str_mv |
http://purl.org/redcol/resource_type/ART |
format |
http://purl.org/coar/resource_type/c_6501 |
status_str |
publishedVersion |
dc.identifier.issn.spa.fl_str_mv |
ISSN: 2339-3459 |
dc.identifier.uri.none.fl_str_mv |
https://repositorio.unal.edu.co/handle/unal/63570 |
dc.identifier.eprints.spa.fl_str_mv |
http://bdigital.unal.edu.co/64016/ |
identifier_str_mv |
ISSN: 2339-3459 |
url |
https://repositorio.unal.edu.co/handle/unal/63570 http://bdigital.unal.edu.co/64016/ |
dc.language.iso.spa.fl_str_mv |
spa |
language |
spa |
dc.relation.spa.fl_str_mv |
https://revistas.unal.edu.co/index.php/esrj/article/view/66106 |
dc.relation.ispartof.spa.fl_str_mv |
Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal Earth Sciences Research Journal |
dc.relation.references.spa.fl_str_mv |
Wang, Jiading and Ma, Yan and Guo, Qianyi and Chu, Di (2017) Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China. Earth Sciences Research Journal, 21 (4). pp. 197-202. ISSN 2339-3459 |
dc.rights.spa.fl_str_mv |
Derechos reservados - Universidad Nacional de Colombia |
dc.rights.coar.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.license.spa.fl_str_mv |
Atribución-NoComercial 4.0 Internacional |
dc.rights.uri.spa.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ |
dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Atribución-NoComercial 4.0 Internacional Derechos reservados - Universidad Nacional de Colombia http://creativecommons.org/licenses/by-nc/4.0/ http://purl.org/coar/access_right/c_abf2 |
eu_rights_str_mv |
openAccess |
dc.format.mimetype.spa.fl_str_mv |
application/pdf |
dc.publisher.spa.fl_str_mv |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencia |
institution |
Universidad Nacional de Colombia |
bitstream.url.fl_str_mv |
https://repositorio.unal.edu.co/bitstream/unal/63570/1/66106-369755-1-PB.pdf https://repositorio.unal.edu.co/bitstream/unal/63570/2/66106-369755-1-PB.pdf.jpg |
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Repositorio Institucional Universidad Nacional de Colombia |
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1814089266629705728 |
spelling |
Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Wang, Jiadingedcb07e5-3e75-4971-83cd-29ed3ac9534c300Ma, Yan289f9637-1236-48d2-b1ee-3957be63ed6d300Guo, Qianyiff86ab2f-3e25-4647-8c18-317bf938727b300Chu, Di4d8cd5ff-fd3a-486b-bf2f-d130e8a1fdae3002019-07-02T21:54:38Z2019-07-02T21:54:38Z2017-10-01ISSN: 2339-3459https://repositorio.unal.edu.co/handle/unal/63570http://bdigital.unal.edu.co/64016/More than 40% area of the Xixian New Area is a loess deposit region, and most of the loess landform is tableland and terrace where the thickness of loess is very large. Therefore, loess collapsibility will be the most important geotechnical problem in future foundation investigation and construction. To explore loess collapsibility in the Xixian New Area, we conducted the K0 compression test, based on the collapsibility mechanism, which has different combinations of pressure (0~1.2 MPa) and water content (4%~Sat). Based on the σ-ε curve under different water content, we calculated the generalised collapse settlement and collapsibility coefficient of every water content under every pressure by subtracting the relevant curve from the saturated curve, and analysed the cross action of pressure and water on loess compressibility. The results show that the average collapsibility level of the northern Xixian New Area is self-weight collapsible level Ⅱ, with a lower limit of 14 m. Compressibility of loess is proportional to pressure and water content. Under low water content, the collapsibility coefficient δs increased while the pressure increased, but under medium and high water content, δs will reach peak with increasing pressure and after that, δs will decrease until its value is close to constant. When under the same pressure, δs decreases when water content increases. If set the additional strain 1.5% as collapse start criterion, then the initial collapse pressure Pi will linear proportional to water content. The initial collapse water content wi will increase sharply when pressure increases under low pressure, but wi will reach a constant value of 26% when pressure is larger than 200 kPa. This consequence will be meaningful for future geotechnical investigation and design in the Xixian New Area.Para estimar la colapsabilidad en Xixian se realizó el test de compresión (K0), de acuerdo con el mecanismo de colapsabilidad, con diferentes combinaciones de presión (0~1.2 MPa) y contenido de agua (4%~Sat). Basado en la curva σ-ε con diferentes contenidos de agua se calcularon los coeficientes de asentamiento y colapsabilidad a partir de substracción de la curva en condiciones de saturación y analizando los efectos de presión y contenido de agua. Los resultados muestran que el promedio de colapsabilidad por su propio peso para el área de Xixian es de nivel II, con un límite bajo de hasta 14 m. La compresibilidad de loess es proporcional a la presión y al contenido de agua. Con un bajo contenido de agua, el coeficiente de colapsabilidad (δs) se incrementó mientras la presión se aumentó; pero, con contenidos medios y altos de agua, el coeficiente de colapsabilidad alcanzó su pico con el incremento de la presión, y luego bajó para prácticamente estabilizarse. Bajo presión constante, la colapsabilidad descendió al aumentar el contenido de agua. Si se asume como criterio inicial de colapso (Pi) una deformación adicional de 1.5%, Pi es linealmente proporcional al contenido de agua. El contenido de agua inicial de colapso (wi) se incrementa drásticamente cuando la presión se eleva a baja presión, sin embargo, el contenido de agua alcanza un valor constante de 26 % cuando la presión es de más de 200 kPa. Estos resultados son significativos para la investigación geotécnica y el diseño estructural en Xixian.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geocienciahttps://revistas.unal.edu.co/index.php/esrj/article/view/66106Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalWang, Jiading and Ma, Yan and Guo, Qianyi and Chu, Di (2017) Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, China. Earth Sciences Research Journal, 21 (4). pp. 197-202. ISSN 2339-345955 Ciencias de la tierra / Earth sciences and geologyXixian New Arealoess collapsibilitywettingpressureinitial collapse water contentDistrito especial de Xixian (China)colapsabilidad de loesshumectaciónpresióncontenido de agua incial de colapso.Influence of Pressure and Water Content on Loess Collapsibility of the Xixian New Area in Shaanxi Province, ChinaArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL66106-369755-1-PB.pdfapplication/pdf981803https://repositorio.unal.edu.co/bitstream/unal/63570/1/66106-369755-1-PB.pdff883d640cd499e67908775c5ba0de3ddMD51THUMBNAIL66106-369755-1-PB.pdf.jpg66106-369755-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg7722https://repositorio.unal.edu.co/bitstream/unal/63570/2/66106-369755-1-PB.pdf.jpg7145aa61b3a5609fd92fab79c6cd4784MD52unal/63570oai:repositorio.unal.edu.co:unal/635702024-04-29 23:11:13.934Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co |