{"id":458,"date":"2025-10-04T08:14:52","date_gmt":"2025-10-04T08:14:52","guid":{"rendered":"https:\/\/ecocretefiber.com\/?page_id=458"},"modified":"2025-10-28T14:08:03","modified_gmt":"2025-10-28T14:08:03","slug":"qingdao-jiaozhou-bay-tunnel-project","status":"publish","type":"page","link":"https:\/\/ecocretefiber.com\/en\/projects\/qingdao-jiaozhou-bay-tunnel-project\/","title":{"rendered":"Qingdao Jiaozhou Bay Tunnel Project"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"458\" class=\"elementor elementor-458\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1d68fafc elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" data-id=\"1d68fafc\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeIn&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3112ee69\" data-id=\"3112ee69\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6400f3f9 elementor-icon-list--layout-inline elementor-list-item-link-inline elementor-align-center elementor-mobile-align-center elementor-invisible elementor-widget elementor-widget-icon-list\" data-id=\"6400f3f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"icon icon-safety\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">project<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60dd54a9 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"60dd54a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Qingdao Jiaozhou Bay Subsea Tunnel<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1de6a4e5 elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"1de6a4e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Segment &amp; lining crack control with Ecocrete\u2122 Polyester Fiber<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5000161d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5000161d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-26123f6b\" data-id=\"26123f6b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2128813b elementor-invisible elementor-widget elementor-widget-image\" data-id=\"2128813b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1088\" height=\"685\" src=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/4e8b069c758046f3b95353512488bbc9.jpeg\" class=\"attachment-full size-full wp-image-471\" alt=\"Night view inside the subsea tunnel with vehicles and clean slab joints\" srcset=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/4e8b069c758046f3b95353512488bbc9.jpeg 1088w, https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/4e8b069c758046f3b95353512488bbc9-300x189.jpeg 300w, https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/4e8b069c758046f3b95353512488bbc9-1024x645.jpeg 1024w, https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/4e8b069c758046f3b95353512488bbc9-768x484.jpeg 768w\" sizes=\"(max-width: 1088px) 100vw, 1088px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12a636f3 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"12a636f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Challenges &amp; Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36c7b028 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"36c7b028\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3><strong>Hydrostatic Pressure, Chlorides, Temperature Gradients \u2014 Controlled<\/strong><\/h3><p>Early-age cracking control: Distributed polyester micro-reinforcement relieves tensile stress at crack tips to reduce plastic shrinkage and thermal micro-cracks in dense, low-w\/c mixes.<\/p><p>Watertightness &amp; joint edges: Added post-crack toughness supports clean arrises around gaskets and reduces edge raveling during transport and assembly.<\/p><p>Seawater environment: Polyester fibers are non-corrosive and feature low moisture uptake, supporting long service life versus steel micro-reinforcement.<\/p><p>Placement &amp; finishing: Ecocrete\u2122 PET fibers disperse quickly in drum or central-mix plants and are compatible with pump placement and segment-mold finishing when standard dispersion steps are followed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-47cb1168 elementor-arrows-position-inside elementor-pagination-position-outside elementor-invisible elementor-widget elementor-widget-image-carousel\" data-id=\"47cb1168\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;slides_to_show&quot;:&quot;1&quot;,&quot;slides_to_show_tablet&quot;:&quot;2&quot;,&quot;slides_to_show_mobile&quot;:&quot;1&quot;,&quot;_animation_mobile&quot;:&quot;fadeInUp&quot;,&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;navigation&quot;:&quot;both&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;effect&quot;:&quot;slide&quot;,&quot;speed&quot;:500}\" data-widget_type=\"image-carousel.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-image-carousel-wrapper swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"\u56fe\u50cf\u8f6e\u64ad\" dir=\"ltr\">\n\t\t\t<div class=\"elementor-image-carousel swiper-wrapper\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4&#039;nin 1&#039;si\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/60330d1dd23244c1967f4dfcb81340fc.png\" alt=\"Portal of Jiaozhou Bay subsea tunnel with signage and landscaped slopes\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4&#039;nin 2&#039;si\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/\u6444\u56fe\u7f51_501591256_\u9752\u5c9b\u80f6\u5dde\u6e7e\u8de8\u6d77\u5927\u6865\u822a\u62cd\u975e\u4f01\u4e1a\u5546\u7528-scaled.jpg\" alt=\"Aerial view of Qingdao Jiaozhou Bay bridge and tunnel alignment\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4&#039;nin 3&#039;si\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/992f59dc10274f0cac78e2412238aac1.png\" alt=\"Tunnel junction with construction canopy and curved concrete lining\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4&#039;nin 4&#039;si\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/ecocretefiber.com\/wp-content\/uploads\/2025\/10\/1e3427e146614f86a33dada9bfd05e41.png\" alt=\"Conceptual rendering of tunnel portals and approach roads at Jiaozhou Bay\" \/><\/figure><\/div>\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-prev\" role=\"button\" tabindex=\"0\">\n\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-left\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M646 125C629 125 613 133 604 142L308 442C296 454 292 471 292 487 292 504 296 521 308 533L604 854C617 867 629 875 646 875 663 875 679 871 692 858 704 846 713 829 713 812 713 796 708 779 692 767L438 487 692 225C700 217 708 204 708 187 708 171 704 154 692 142 675 129 663 125 646 125Z\"><\/path><\/svg>\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-next\" role=\"button\" tabindex=\"0\">\n\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-right\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M696 533C708 521 713 504 713 487 713 471 708 454 696 446L400 146C388 133 375 125 354 125 338 125 325 129 313 142 300 154 292 171 292 187 292 204 296 221 308 233L563 492 304 771C292 783 288 800 288 817 288 833 296 850 308 863 321 871 338 875 354 875 371 875 388 867 400 854L696 533Z\"><\/path><\/svg>\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"swiper-pagination\"><\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08c6484 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"08c6484\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3><strong>Tighter Cracks, Cleaner Joints, Reliable Lining<\/strong><\/h3><p>Project teams observed tighter crack widths in heat-affected pours and consistent surface finish on segments and in-situ lining. Polyester fiber reinforcement supports leak-tight performance, reduces touch-up frequency, and helps maintain long-term durability in a chloride environment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-108741a2\" data-id=\"108741a2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-71636037 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"71636037\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Project Overview<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d4e0728 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"5d4e0728\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Durable Tunnel Concrete Under High Water Pressure<\/strong><\/p><p><b><\/b>The Jiaozhou Bay Subsea Tunnel connects Qingdao across the bay with long stretches of immersed and bored tunnel exposed to continuous hydrostatic pressure and chloride-rich seawater. To limit plastic-shrinkage and early thermal cracking in segments, secondary lining, and shotcrete repairs, the mix incorporated Ecocrete\u2122 Polyester Fiber (PET). The fine, 3D fiber network helps arrest micro-cracks at their origin, supporting watertightness, joint integrity, and long-term durability.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26d8de8b elementor-widget-mobile__width-inherit elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-invisible elementor-widget elementor-widget-icon-list\" data-id=\"26d8de8b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"icon-list.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"icon icon-apartment1\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Application: precast segments, in-situ lining, shotcrete touch-ups<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"icon icon-calendar3\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Fiber type: Ecocrete\u2122 Polyester Fiber (typical lengths 6\u201312 mm)<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"icon icon-user\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Typical dosage: 0.6\u20131.5 kg\/m\u00b3 (optimize per mix design and placement)<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"icon icon-map-marker1\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Benefits: restrained crack formation, tighter crack widths, improved toughness, non-corrosive performance<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b951669 elementor-widget elementor-widget-button\" data-id=\"b951669\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>project Qingdao Jiaozhou Bay Subsea Tunnel Segment &amp; lining crack control with Ecocrete\u2122 Polyester Fiber Challenges &amp; Solution Hydrostatic Pressure, Chlorides, Temperature Gradients \u2014 Controlled Early-age cracking control: Distributed polyester micro-reinforcement relieves tensile stress at crack tips to reduce plastic shrinkage and thermal micro-cracks in dense, low-w\/c mixes. Watertightness &amp; joint edges: Added post-crack toughness [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":108,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-458","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/pages\/458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/comments?post=458"}],"version-history":[{"count":14,"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/pages\/458\/revisions"}],"predecessor-version":[{"id":1606,"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/pages\/458\/revisions\/1606"}],"up":[{"embeddable":true,"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/pages\/108"}],"wp:attachment":[{"href":"https:\/\/ecocretefiber.com\/en\/wp-json\/wp\/v2\/media?parent=458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}