Loading…

Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV

Abstract Helical anchors are receiving more attention these days due to their economic and environmental advantages. However, the behavior of these structures requires further investigation. One of the critical areas requiring further attention is their failure mechanism under monotonic loading cond...

Full description

Saved in:
Bibliographic Details
Published in:International journal of geomechanics 2022-08, Vol.22 (8)
Main Authors: Salehzadeh, Hossein, Nuri, Hamed, Rafsanjani, Ali Akbar Heshmati
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43
cites cdi_FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43
container_end_page
container_issue 8
container_start_page
container_title International journal of geomechanics
container_volume 22
creator Salehzadeh, Hossein
Nuri, Hamed
Rafsanjani, Ali Akbar Heshmati
description Abstract Helical anchors are receiving more attention these days due to their economic and environmental advantages. However, the behavior of these structures requires further investigation. One of the critical areas requiring further attention is their failure mechanism under monotonic loading conditions. This study presents the results of centrifuge testing of half-models of helical anchors behind a Perspex window, performed to visualize the failure mechanism of screw anchors using particle image velocimetry analysis. The density change that is a result of installation disturbance was simulated by a novel technique. The results showed that embedment depth had a great influence on the failure mechanism of the anchors. The critical embedment depth ratio determined was H/D = 4–5 that separated the shallow and deep behavior of the anchors. Soil was mobilized as a reverse truncated cone in the shallow mode, while a flow-around mechanism was formed in the deep mode. The inclination of the mobilized zone on both sides of the helix was close to the critical state friction angle (29°) in shallow mode. The inclination of the failure surface was related to the dilation angle of the sand in the deep mode. A minimum distance of 3D was recommended to minimize the interaction of adjacent helical plates in a multihelix anchor. In addition, a distance of 4D was suggested to minimize the interaction of adjacent helical anchors in a group.
doi_str_mv 10.1061/(ASCE)GM.1943-5622.0002422
format article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2669224831</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2669224831</sourcerecordid><originalsourceid>FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43</originalsourceid><addsrcrecordid>eNp1kMtOwzAQRS0EEqXwDxZsYJHid2N2VdSXaAVSga3lJHabKnWK3Sz69zgqjxUrj-x7ZjwHgFuMBhgJ_Hg_WmXjh-lygCWjCReEDBBChBFyBnq_d-ex5pQkVDB8Ca5C2CKEh4zLHnie6KpuvYFLU2y0q8IONhbOTF0VuoYjV2waH2Dl4Eq7EuZHmBl38JVt1xFpyphza9g9vc4_rsGF1XUwN99nH7xPxm_ZLFm8TOfZaJFonBKcMMM4N5paqXlOJZY4t5IzjeJ3CRVGCsOZpbygcZM8lVLidGgRKYkpJTeM9sHdqe_eN5-tCQe1bVrv4khFhJCEsJTimHo6pQrfhOCNVXtf7bQ_KoxUJ0-pTp6aLlUnSnWi1Le8CIsTrENh_tr_kP-DX3uycGk</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2669224831</pqid></control><display><type>article</type><title>Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV</title><source>ASCE Online Journals</source><creator>Salehzadeh, Hossein ; Nuri, Hamed ; Rafsanjani, Ali Akbar Heshmati</creator><creatorcontrib>Salehzadeh, Hossein ; Nuri, Hamed ; Rafsanjani, Ali Akbar Heshmati</creatorcontrib><description>Abstract Helical anchors are receiving more attention these days due to their economic and environmental advantages. However, the behavior of these structures requires further investigation. One of the critical areas requiring further attention is their failure mechanism under monotonic loading conditions. This study presents the results of centrifuge testing of half-models of helical anchors behind a Perspex window, performed to visualize the failure mechanism of screw anchors using particle image velocimetry analysis. The density change that is a result of installation disturbance was simulated by a novel technique. The results showed that embedment depth had a great influence on the failure mechanism of the anchors. The critical embedment depth ratio determined was H/D = 4–5 that separated the shallow and deep behavior of the anchors. Soil was mobilized as a reverse truncated cone in the shallow mode, while a flow-around mechanism was formed in the deep mode. The inclination of the mobilized zone on both sides of the helix was close to the critical state friction angle (29°) in shallow mode. The inclination of the failure surface was related to the dilation angle of the sand in the deep mode. A minimum distance of 3D was recommended to minimize the interaction of adjacent helical plates in a multihelix anchor. In addition, a distance of 4D was suggested to minimize the interaction of adjacent helical anchors in a group.</description><identifier>ISSN: 1532-3641</identifier><identifier>EISSN: 1943-5622</identifier><identifier>DOI: 10.1061/(ASCE)GM.1943-5622.0002422</identifier><language>eng</language><publisher>Reston: American Society of Civil Engineers</publisher><subject>Anchors ; Centrifuge model ; Centrifuges ; Distance ; Economics ; Failure analysis ; Failure mechanisms ; Failure surface ; Image processing ; Inclination ; Particle image velocimetry ; Sand ; Technical Papers</subject><ispartof>International journal of geomechanics, 2022-08, Vol.22 (8)</ispartof><rights>2022 American Society of Civil Engineers</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43</citedby><cites>FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43</cites><orcidid>0000-0002-2681-2280 ; 0000-0003-4332-7575 ; 0000-0003-0289-6640</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttp://ascelibrary.org/doi/pdf/10.1061/(ASCE)GM.1943-5622.0002422$$EPDF$$P50$$Gasce$$H</linktopdf><linktohtml>$$Uhttp://ascelibrary.org/doi/abs/10.1061/(ASCE)GM.1943-5622.0002422$$EHTML$$P50$$Gasce$$H</linktohtml><link.rule.ids>314,780,784,3252,10068,27924,27925,76191,76199</link.rule.ids></links><search><creatorcontrib>Salehzadeh, Hossein</creatorcontrib><creatorcontrib>Nuri, Hamed</creatorcontrib><creatorcontrib>Rafsanjani, Ali Akbar Heshmati</creatorcontrib><title>Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV</title><title>International journal of geomechanics</title><description>Abstract Helical anchors are receiving more attention these days due to their economic and environmental advantages. However, the behavior of these structures requires further investigation. One of the critical areas requiring further attention is their failure mechanism under monotonic loading conditions. This study presents the results of centrifuge testing of half-models of helical anchors behind a Perspex window, performed to visualize the failure mechanism of screw anchors using particle image velocimetry analysis. The density change that is a result of installation disturbance was simulated by a novel technique. The results showed that embedment depth had a great influence on the failure mechanism of the anchors. The critical embedment depth ratio determined was H/D = 4–5 that separated the shallow and deep behavior of the anchors. Soil was mobilized as a reverse truncated cone in the shallow mode, while a flow-around mechanism was formed in the deep mode. The inclination of the mobilized zone on both sides of the helix was close to the critical state friction angle (29°) in shallow mode. The inclination of the failure surface was related to the dilation angle of the sand in the deep mode. A minimum distance of 3D was recommended to minimize the interaction of adjacent helical plates in a multihelix anchor. In addition, a distance of 4D was suggested to minimize the interaction of adjacent helical anchors in a group.</description><subject>Anchors</subject><subject>Centrifuge model</subject><subject>Centrifuges</subject><subject>Distance</subject><subject>Economics</subject><subject>Failure analysis</subject><subject>Failure mechanisms</subject><subject>Failure surface</subject><subject>Image processing</subject><subject>Inclination</subject><subject>Particle image velocimetry</subject><subject>Sand</subject><subject>Technical Papers</subject><issn>1532-3641</issn><issn>1943-5622</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp1kMtOwzAQRS0EEqXwDxZsYJHid2N2VdSXaAVSga3lJHabKnWK3Sz69zgqjxUrj-x7ZjwHgFuMBhgJ_Hg_WmXjh-lygCWjCReEDBBChBFyBnq_d-ex5pQkVDB8Ca5C2CKEh4zLHnie6KpuvYFLU2y0q8IONhbOTF0VuoYjV2waH2Dl4Eq7EuZHmBl38JVt1xFpyphza9g9vc4_rsGF1XUwN99nH7xPxm_ZLFm8TOfZaJFonBKcMMM4N5paqXlOJZY4t5IzjeJ3CRVGCsOZpbygcZM8lVLidGgRKYkpJTeM9sHdqe_eN5-tCQe1bVrv4khFhJCEsJTimHo6pQrfhOCNVXtf7bQ_KoxUJ0-pTp6aLlUnSnWi1Le8CIsTrENh_tr_kP-DX3uycGk</recordid><startdate>20220801</startdate><enddate>20220801</enddate><creator>Salehzadeh, Hossein</creator><creator>Nuri, Hamed</creator><creator>Rafsanjani, Ali Akbar Heshmati</creator><general>American Society of Civil Engineers</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>KR7</scope><scope>L.G</scope><orcidid>https://orcid.org/0000-0002-2681-2280</orcidid><orcidid>https://orcid.org/0000-0003-4332-7575</orcidid><orcidid>https://orcid.org/0000-0003-0289-6640</orcidid></search><sort><creationdate>20220801</creationdate><title>Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV</title><author>Salehzadeh, Hossein ; Nuri, Hamed ; Rafsanjani, Ali Akbar Heshmati</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Anchors</topic><topic>Centrifuge model</topic><topic>Centrifuges</topic><topic>Distance</topic><topic>Economics</topic><topic>Failure analysis</topic><topic>Failure mechanisms</topic><topic>Failure surface</topic><topic>Image processing</topic><topic>Inclination</topic><topic>Particle image velocimetry</topic><topic>Sand</topic><topic>Technical Papers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Salehzadeh, Hossein</creatorcontrib><creatorcontrib>Nuri, Hamed</creatorcontrib><creatorcontrib>Rafsanjani, Ali Akbar Heshmati</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>International journal of geomechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Salehzadeh, Hossein</au><au>Nuri, Hamed</au><au>Rafsanjani, Ali Akbar Heshmati</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV</atitle><jtitle>International journal of geomechanics</jtitle><date>2022-08-01</date><risdate>2022</risdate><volume>22</volume><issue>8</issue><issn>1532-3641</issn><eissn>1943-5622</eissn><abstract>Abstract Helical anchors are receiving more attention these days due to their economic and environmental advantages. However, the behavior of these structures requires further investigation. One of the critical areas requiring further attention is their failure mechanism under monotonic loading conditions. This study presents the results of centrifuge testing of half-models of helical anchors behind a Perspex window, performed to visualize the failure mechanism of screw anchors using particle image velocimetry analysis. The density change that is a result of installation disturbance was simulated by a novel technique. The results showed that embedment depth had a great influence on the failure mechanism of the anchors. The critical embedment depth ratio determined was H/D = 4–5 that separated the shallow and deep behavior of the anchors. Soil was mobilized as a reverse truncated cone in the shallow mode, while a flow-around mechanism was formed in the deep mode. The inclination of the mobilized zone on both sides of the helix was close to the critical state friction angle (29°) in shallow mode. The inclination of the failure surface was related to the dilation angle of the sand in the deep mode. A minimum distance of 3D was recommended to minimize the interaction of adjacent helical plates in a multihelix anchor. In addition, a distance of 4D was suggested to minimize the interaction of adjacent helical anchors in a group.</abstract><cop>Reston</cop><pub>American Society of Civil Engineers</pub><doi>10.1061/(ASCE)GM.1943-5622.0002422</doi><orcidid>https://orcid.org/0000-0002-2681-2280</orcidid><orcidid>https://orcid.org/0000-0003-4332-7575</orcidid><orcidid>https://orcid.org/0000-0003-0289-6640</orcidid></addata></record>
fulltext fulltext
identifier ISSN: 1532-3641
ispartof International journal of geomechanics, 2022-08, Vol.22 (8)
issn 1532-3641
1943-5622
language eng
recordid cdi_proquest_journals_2669224831
source ASCE Online Journals
subjects Anchors
Centrifuge model
Centrifuges
Distance
Economics
Failure analysis
Failure mechanisms
Failure surface
Image processing
Inclination
Particle image velocimetry
Sand
Technical Papers
title Failure Mechanism of Helical Anchors in Sand by Centrifuge Modeling and PIV
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-23T08%3A17%3A56IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Failure%20Mechanism%20of%20Helical%20Anchors%20in%20Sand%20by%20Centrifuge%20Modeling%20and%20PIV&rft.jtitle=International%20journal%20of%20geomechanics&rft.au=Salehzadeh,%20Hossein&rft.date=2022-08-01&rft.volume=22&rft.issue=8&rft.issn=1532-3641&rft.eissn=1943-5622&rft_id=info:doi/10.1061/(ASCE)GM.1943-5622.0002422&rft_dat=%3Cproquest_cross%3E2669224831%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-a1821-4e455ea3f9a5b39191bf954a0943236e96e54f35c3002b8999187f02d2ed95e43%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2669224831&rft_id=info:pmid/&rfr_iscdi=true