土工格栅加筋与未加筋钙质砂的液化及后液化行为

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Lin Zhou , Jian-Feng Chen , Yan Zhu , Ting Yao
{"title":"土工格栅加筋与未加筋钙质砂的液化及后液化行为","authors":"Lin Zhou ,&nbsp;Jian-Feng Chen ,&nbsp;Yan Zhu ,&nbsp;Ting Yao","doi":"10.1016/j.geotexmem.2023.11.002","DOIUrl":null,"url":null,"abstract":"<div><p><span>To explore the feasibility of geogrid reinforcement as a promising countermeasure to improve the </span>liquefaction<span> and post-liquefaction resistance of calcareous sand, extensive undrained monotonic and multi-stage triaxial tests<span> were performed on unreinforced and geogrid reinforced calcareous sand with different relative densities. The test results illustrate that pore pressure<span><span> generation curves of unreinforced and reinforced calcareous sand gradually evolve from S-shaped to hyperbolic-shaped with the increase in relative density, cyclic stress<span><span> ratio, and effective confining pressure. Following this, a pore pressure model applicable to both unreinforced and reinforced calcareous sand is proposed. The liquefaction resistance of calcareous sand increases with the increase in relative density, whereas an elevated cyclic stress ratio increases its liquefaction susceptibility. A virtually unique relationship can be observed between the liquefaction resistance normalized to the product of phase transformation </span>strength ratio and relative density against the number of cycles for triggering liquefaction, providing an effective means of early assessing sand liquefaction resistance. Moreover, the geogrid exhibits excellent reinforcement efficiency in enhancing the liquefaction resistance of calcareous sand at relative densities of 50% and 70%. During the post-liquefaction stage, increasing relative density and geogrid reinforcement can accelerate the recovery of stiffness and strength for liquefied calcareous sand and improve the post-liquefaction strength. In general, geogrid reinforcement is considered a good alternative to </span></span>densification<span> for improving the engineering properties of calcareous sand and offers great application prospects in marine engineering construction.</span></span></span></span></p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 3","pages":"Pages 286-303"},"PeriodicalIF":4.7000,"publicationDate":"2023-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Liquefaction and post-liquefaction behaviors of unreinforced and geogrid reinforced calcareous sand\",\"authors\":\"Lin Zhou ,&nbsp;Jian-Feng Chen ,&nbsp;Yan Zhu ,&nbsp;Ting Yao\",\"doi\":\"10.1016/j.geotexmem.2023.11.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>To explore the feasibility of geogrid reinforcement as a promising countermeasure to improve the </span>liquefaction<span> and post-liquefaction resistance of calcareous sand, extensive undrained monotonic and multi-stage triaxial tests<span> were performed on unreinforced and geogrid reinforced calcareous sand with different relative densities. The test results illustrate that pore pressure<span><span> generation curves of unreinforced and reinforced calcareous sand gradually evolve from S-shaped to hyperbolic-shaped with the increase in relative density, cyclic stress<span><span> ratio, and effective confining pressure. Following this, a pore pressure model applicable to both unreinforced and reinforced calcareous sand is proposed. The liquefaction resistance of calcareous sand increases with the increase in relative density, whereas an elevated cyclic stress ratio increases its liquefaction susceptibility. A virtually unique relationship can be observed between the liquefaction resistance normalized to the product of phase transformation </span>strength ratio and relative density against the number of cycles for triggering liquefaction, providing an effective means of early assessing sand liquefaction resistance. Moreover, the geogrid exhibits excellent reinforcement efficiency in enhancing the liquefaction resistance of calcareous sand at relative densities of 50% and 70%. During the post-liquefaction stage, increasing relative density and geogrid reinforcement can accelerate the recovery of stiffness and strength for liquefied calcareous sand and improve the post-liquefaction strength. In general, geogrid reinforcement is considered a good alternative to </span></span>densification<span> for improving the engineering properties of calcareous sand and offers great application prospects in marine engineering construction.</span></span></span></span></p></div>\",\"PeriodicalId\":55096,\"journal\":{\"name\":\"Geotextiles and Geomembranes\",\"volume\":\"52 3\",\"pages\":\"Pages 286-303\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2023-11-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geotextiles and Geomembranes\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0266114423000961\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geotextiles and Geomembranes","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266114423000961","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0

摘要

为了探讨土工格栅加固作为提高钙质砂液化和液化后抗力的可行对策,对不同相对密度的未加筋和加筋钙质砂进行了广泛的不排水单调和多阶段三轴试验。试验结果表明,随着相对密度、循环应力比和有效围压的增加,未加筋和加筋钙质砂的孔隙压力生成曲线由s型逐渐演变为双曲型。在此基础上,提出了一种既适用于未加筋又适用于加筋钙质砂的孔隙压力模型。石灰质砂的液化阻力随相对密度的增大而增大,而循环应力比的增大则使其液化敏感性增大。在液化阻力归一化为相变强度比和相对密度的乘积与触发液化的循环次数之间,可以观察到一种几乎独特的关系,这为早期评估砂土液化阻力提供了有效的手段。在相对密度为50%和70%时,土工格栅对钙质砂的抗液化能力有较好的增强作用。在液化后阶段,增加相对密度和土工格栅加固可以加速液化钙质砂刚度和强度的恢复,提高液化后强度。总的来说,土工格栅加固被认为是改善钙质砂工程性能的一种很好的替代方法,在海洋工程建设中具有很大的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Liquefaction and post-liquefaction behaviors of unreinforced and geogrid reinforced calcareous sand

To explore the feasibility of geogrid reinforcement as a promising countermeasure to improve the liquefaction and post-liquefaction resistance of calcareous sand, extensive undrained monotonic and multi-stage triaxial tests were performed on unreinforced and geogrid reinforced calcareous sand with different relative densities. The test results illustrate that pore pressure generation curves of unreinforced and reinforced calcareous sand gradually evolve from S-shaped to hyperbolic-shaped with the increase in relative density, cyclic stress ratio, and effective confining pressure. Following this, a pore pressure model applicable to both unreinforced and reinforced calcareous sand is proposed. The liquefaction resistance of calcareous sand increases with the increase in relative density, whereas an elevated cyclic stress ratio increases its liquefaction susceptibility. A virtually unique relationship can be observed between the liquefaction resistance normalized to the product of phase transformation strength ratio and relative density against the number of cycles for triggering liquefaction, providing an effective means of early assessing sand liquefaction resistance. Moreover, the geogrid exhibits excellent reinforcement efficiency in enhancing the liquefaction resistance of calcareous sand at relative densities of 50% and 70%. During the post-liquefaction stage, increasing relative density and geogrid reinforcement can accelerate the recovery of stiffness and strength for liquefied calcareous sand and improve the post-liquefaction strength. In general, geogrid reinforcement is considered a good alternative to densification for improving the engineering properties of calcareous sand and offers great application prospects in marine engineering construction.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信