{"title":"真空固结对前特斯科科湖异常软粘土水力学性质的影响","authors":"Norma Patricia López-Acosta, Alejandra Liliana Espinosa-Santiago","doi":"10.1016/j.sandf.2023.101410","DOIUrl":null,"url":null,"abstract":"<div><p>The area of the former Texcoco Lake in Mexico is characterized by soft lacustrine clay strata with high water content and high compressibility. The construction of a new airport was planned in this area, which requires soil stabilization. One soil improvement option is the use of vacuum preloading systems that apply a vacuum to the soil through vertical drains. This study evaluates the improvement on hydromechanical properties resulting from the implementation of two vacuum techniques. In 2016, two test embankments with surcharge preloading and vertical drains were constructed to apply a vacuum using the drain-to-drain technique in one embankment and the airtight membrane technique in the other. The average vacuum pressures applied for six months in the test embankments were −58 kPa and −63 kPa with the drain-to-drain and airtight membrane techniques, respectively. The improvement on the properties varied between the two techniques. The airtight membrane technique reduced the water content and the void ratio up to 50 % and 46 %, respectively. While the drain-to-drain technique reduced the water content and the void ratio up to 15 % and 13 %, respectively. The degree of consolidation estimated using different observational methods at the center of both test embankments ranged from 86 % to 88 %.</p></div>","PeriodicalId":21857,"journal":{"name":"Soils and Foundations","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0038080623001397/pdfft?md5=f250f2ba9fc69b87db97abfad124321c&pid=1-s2.0-S0038080623001397-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Vacuum consolidation effect on the hydromechanical properties of the unusual soft clays of the former Texcoco Lake\",\"authors\":\"Norma Patricia López-Acosta, Alejandra Liliana Espinosa-Santiago\",\"doi\":\"10.1016/j.sandf.2023.101410\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The area of the former Texcoco Lake in Mexico is characterized by soft lacustrine clay strata with high water content and high compressibility. The construction of a new airport was planned in this area, which requires soil stabilization. One soil improvement option is the use of vacuum preloading systems that apply a vacuum to the soil through vertical drains. This study evaluates the improvement on hydromechanical properties resulting from the implementation of two vacuum techniques. In 2016, two test embankments with surcharge preloading and vertical drains were constructed to apply a vacuum using the drain-to-drain technique in one embankment and the airtight membrane technique in the other. The average vacuum pressures applied for six months in the test embankments were −58 kPa and −63 kPa with the drain-to-drain and airtight membrane techniques, respectively. The improvement on the properties varied between the two techniques. The airtight membrane technique reduced the water content and the void ratio up to 50 % and 46 %, respectively. While the drain-to-drain technique reduced the water content and the void ratio up to 15 % and 13 %, respectively. The degree of consolidation estimated using different observational methods at the center of both test embankments ranged from 86 % to 88 %.</p></div>\",\"PeriodicalId\":21857,\"journal\":{\"name\":\"Soils and Foundations\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2023-12-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0038080623001397/pdfft?md5=f250f2ba9fc69b87db97abfad124321c&pid=1-s2.0-S0038080623001397-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Soils and Foundations\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0038080623001397\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soils and Foundations","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0038080623001397","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
Vacuum consolidation effect on the hydromechanical properties of the unusual soft clays of the former Texcoco Lake
The area of the former Texcoco Lake in Mexico is characterized by soft lacustrine clay strata with high water content and high compressibility. The construction of a new airport was planned in this area, which requires soil stabilization. One soil improvement option is the use of vacuum preloading systems that apply a vacuum to the soil through vertical drains. This study evaluates the improvement on hydromechanical properties resulting from the implementation of two vacuum techniques. In 2016, two test embankments with surcharge preloading and vertical drains were constructed to apply a vacuum using the drain-to-drain technique in one embankment and the airtight membrane technique in the other. The average vacuum pressures applied for six months in the test embankments were −58 kPa and −63 kPa with the drain-to-drain and airtight membrane techniques, respectively. The improvement on the properties varied between the two techniques. The airtight membrane technique reduced the water content and the void ratio up to 50 % and 46 %, respectively. While the drain-to-drain technique reduced the water content and the void ratio up to 15 % and 13 %, respectively. The degree of consolidation estimated using different observational methods at the center of both test embankments ranged from 86 % to 88 %.
期刊介绍:
Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020.
Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.