{"id":8698,"date":"2018-09-10T08:24:40","date_gmt":"2018-09-10T08:24:40","guid":{"rendered":"https:\/\/enginir-demo.pbminfotech.com\/datasite\/?p=8667"},"modified":"2025-10-21T10:47:25","modified_gmt":"2025-10-21T10:47:25","slug":"meru-and-menora-tunnel-periodical-crack-monitoring","status":"publish","type":"post","link":"https:\/\/cases.flipnixsolutions.com\/zh\/2018\/09\/10\/meru-and-menora-tunnel-periodical-crack-monitoring\/","title":{"rendered":"Meru and Menora Tunnel Periodical Crack Monitoring"},"content":{"rendered":"
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1.0 Introduction<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div>\r\n\r\n\n\t
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Cracks were observed on the concrete lining of both Meru and Menora tunnels.Changes instresses in the tunnel wall will induce strains which may cause the concrete to crack and where cracks were existing, to widen.Evidence of stress changes can therefore be observed from the changes in crack pattern and in the existing crack width.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/div>\r\n\r\n<\/div>\r\n\r\n

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2.0 Objective<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div>\r\n\r\n\n\t
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The main objectives of the mapping and monitoring is to study the pattern of the cracks and behaviour.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/div>\r\n\r\n<\/div>\r\n\r\n

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3.0 Tests<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div>\r\n\r\n\n\t
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The various types of monitoring carried out were:<\/p>\n

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  • Crack mapping<\/li>\n
  • Crack monitoring using ‘Avongard’ crack gauge, Tell Tale glass, crack microscope and Demac gauge.<\/li>\n<\/ul>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/div>\r\n\r\n<\/div>\r\n\r\n
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    4.0 No. of Test<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div>\r\n\r\n\n\t
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    Type of Test<\/b><\/td>\nNo. of Test<\/b><\/td>\n<\/tr>\n
    Crack mapping<\/td>\n20 panels<\/td>\n<\/tr>\n
    “Avongard” crack gauge<\/td>\n20 nos<\/td>\n<\/tr>\n
    Tell Tale glass<\/td>\n100 nos<\/td>\n<\/tr>\n
    Demac points<\/td>\n50 nos<\/td>\n<\/tr>\n
    Crack width<\/td>\n50 nos<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/div>\r\n\r\n<\/div>\r\n\r\n
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    4.0 Results and Conclusion<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div>\r\n\r\n\n\t
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    Based on the crack pattern observed, the cracks are reasonably random. Crack width measured are between 0.2mm to 1.25mm.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/div>\r\n\r\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    \t\t\t\tDuis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Morbi leo risus, porta ac consectetur ac, vestibu lum at eros. Nulla vitae elit libero, a pharetra augue.\t\t<\/p>","protected":false},"author":1,"featured_media":10972,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[10],"class_list":["post-8698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-study","tag-mechanical"],"acf":[],"_links":{"self":[{"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/posts\/8698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/comments?post=8698"}],"version-history":[{"count":3,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/posts\/8698\/revisions"}],"predecessor-version":[{"id":11580,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/posts\/8698\/revisions\/11580"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/media\/10972"}],"wp:attachment":[{"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/media?parent=8698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/categories?post=8698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cases.flipnixsolutions.com\/zh\/wp-json\/wp\/v2\/tags?post=8698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}