{"id":3175,"date":"2025-10-29T14:41:04","date_gmt":"2025-10-29T05:41:04","guid":{"rendered":"https:\/\/xb317241.xbiz.jp\/?page_id=3175"},"modified":"2026-01-09T13:10:34","modified_gmt":"2026-01-09T04:10:34","slug":"tnf-demolition","status":"publish","type":"page","link":"https:\/\/www.takeuchi-const.co.jp\/en\/sustainability\/tnf-demolition\/","title":{"rendered":"Construction-to-Demolition Lifecycle"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>An Environmentally Conscious Foundation Method from Construction to Demolition<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The TNF 2.0 method is an environmentally conscious construction method not only during construction, but also at the time of building removal and reconstruction.<\/p>\n\n\n<p><dl class=\"c_share\">\n  <dt>Share this article<\/dt>\n  <dd>\n        <nav aria-label=\"Social media\">\n      <ul>\n        <li>\n          <a rel=\"nofollow noopener\" target=\"_blank\" 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href=\"http:\/\/getpocket.com\/edit?url=https:\/\/www.takeuchi-const.co.jp\/en\/sustainability\/tnf-demolition\/&text=Construction-to-Demolition Lifecycle\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/themes\/takeuchi\/img\/ico-pocket.png\" alt=\"Pocket\" width=\"30\" height=\"30\">\n          <\/a>\n        <\/li>-->\n        <li>\n          <button>Copy link<\/button>\n        <\/li>\n      <\/ul>\n    <\/nav>\n  <\/dd>\n<\/dl><div class=\"c_toc\">\n  <nav aria-label=\"Table of contents\">\n    <p class=\"ttl\">Table of Contents<\/p>\n    <ul><\/ul>\n  <\/nav>\n<\/div><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Environmental Considerations During Construction<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Reduction of Excavated Surplus Soil<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">With conventional pile foundation methods, much of the surplus soil generated during excavation becomes muddy sludge, which must be treated as construction waste.<br>\nIn contrast, the TNF method produces high-quality improved soil, making it suitable for reuse on site.<\/p>\n\n\n\n<div class=\"wp-block-group ptn_fig2 is-layout-grid wp-container-core-group-is-layout-549e1f2d wp-block-group-is-layout-grid\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%9D%AD%E6%9F%B1%E7%8A%B6%E6%94%B9%E8%89%AF%E6%AE%8B%E5%9C%9F.png\" alt=\"\" class=\"wp-image-3386\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%9D%AD%E6%9F%B1%E7%8A%B6%E6%94%B9%E8%89%AF%E6%AE%8B%E5%9C%9F%EF%BC%92.png\" alt=\"\" class=\"wp-image-3387\"\/><\/figure>\n<\/div>\n\n\n\n<p class=\"ptn_cap wp-block-paragraph\"><em>Column improvement and pile methods: soil has a sludge-like, viscous consistency<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This improved soil can be reused as subfloor fill material or for exterior works, reducing the volume of surplus soil to less than half that of pile foundation methods.<br>\nThis simultaneously reduces disposal costs and environmental impact.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Reduced CO\u2082 Emissions Through Shorter Construction Periods<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The TNF 2.0 method does not require large-scale construction work like pile foundations and can be executed using standard construction machinery, shortening equipment procurement time.<br>\nIn addition, concrete can be placed directly on the improved ground with minimal formwork, enabling shorter construction periods.<br>\nAs a result, CO\u2082 emissions can be reduced through shortened construction schedules.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Construction Using Standard Machinery<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><em>No specialized machinery required, enabling shorter construction periods and lower costs<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%B1%8E%E7%94%A8%E6%A9%9F%E6%A2%B0%E3%81%A7%E6%96%BD%E5%B7%A5.png\" alt=\"\" class=\"wp-image-3392\"\/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>No Formwork Required<\/strong><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Concrete can be placed directly on the improved ground, reducing the amount of formwork required<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%94%B9%E8%89%AF%E5%9C%B0%E7%9B%A4%E3%81%AB%E7%9B%B4%E6%8E%A5%E3%82%B3%E3%83%B3%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%88%E3%82%92%E6%89%93%E8%A8%AD%E3%81%A7%E3%81%8D%E3%80%81%E5%9E%8B%E6%9E%A0%E9%87%8F%E3%82%92%E4%BD%8E%E6%B8%9B.png\" alt=\"\" class=\"wp-image-3393\"\/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>No Temporary Work Costs<\/strong><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Temporary working platforms are created during ground improvement, eliminating the need for full-site steel plates<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%94%B9%E8%89%AF%E5%B7%A5%E4%BA%8B%E4%B8%AD%E3%81%AB%E6%96%BD%E5%B7%A5%E8%B6%B3%E5%A0%B4%E3%82%92%E4%BD%9C%E3%82%8B%E7%82%BA%E3%80%81%E5%85%A8%E9%9D%A2%E7%9A%84%E3%81%AA%E6%95%B7%E9%89%84%E6%9D%BF%E7%AD%89%E3%81%AF%E4%B8%8D%E8%A6%81.png\" alt=\"\" class=\"wp-image-3394\"\/><\/figure>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Demolition of the TNF 2.0 Method<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Easy Demolition of Improved Ground<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">With conventional column improvement and pile foundation methods, large-scale work such as pile extraction is required during demolition, and removal costs can reach approximately three times the original construction cost.<br>\nIn contrast, the TNF method requires work only to a shallow depth of approximately 2\u20133 meters below ground level, allowing demolition using standard machinery. As a result, removal and demolition costs can be reduced to about half of the original construction cost.<\/p>\n\n\n\n<div class=\"wp-block-group ptn_fig2 is-layout-grid wp-container-core-group-is-layout-549e1f2d wp-block-group-is-layout-grid\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"516\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.TNF_-768x516-1.png\" alt=\"\" class=\"wp-image-4696\" srcset=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.TNF_-768x516-1.png 768w, https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.TNF_-768x516-1-300x202.png 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">Demolition cost: approximately half of construction cost<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"516\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.\u676d-1-768x516-1.png\" alt=\"\" class=\"wp-image-4697\" srcset=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.\u676d-1-768x516-1.png 768w, https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2026\/01\/\u6bd4\u8f033.\u676d-1-768x516-1-300x202.png 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">Pile foundations: removal cost approximately three times installation cost<\/figcaption><\/figure>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Reduction of Industrial Waste Through Reuse of Excavated Material<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The improved ground material generated during demolition can be finely crushed and reused as construction soil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">According to the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) standards for construction-generated soil utilization, soil produced from TNF ground improvement meets or exceeds Class 3 construction soil criteria and can be used as backfill material without additional treatment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This makes it possible to suppress the generation of industrial waste while reducing environmental impact and achieving high cost performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Benefits During Reconstruction<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">With the TNF method, the improved soil generated during demolition can be reused on site as backfill material, maintaining good ground conditions after demolition.<br>\nAs a result, the amount of solidifying agents required for ground improvement during reconstruction can be reduced.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this way, the TNF method is a ground improvement technology that achieves both environmental performance and economic efficiency throughout the entire lifecycle\u2014from construction to demolition and reconstruction.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E6%89%8B.jpg\" alt=\"\" class=\"wp-image-3401\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Demolition Procedure for Improved Ground<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Demolition case study<\/em><br>\n<em>Use: Supermarket<\/em><br>\n<em>Completion: May 2011<\/em><br>\n<em>Demolition: October 2019<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Crushing of Slab and Improved Ground<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The improved ground is broken using an excavator, and large masses are divided into smaller pieces.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E8%A7%A3%E4%BD%93%E3%83%90%E3%83%83%E3%82%AF%E3%83%9B%E3%82%A6.gif\" alt=\"\" class=\"wp-image-3402\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Crushing of Large Blocks<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A nibbler (lightweight crusher) is used to further break down large blocks.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E8%A7%A3%E4%BD%93%E3%83%8B%E3%83%96%E3%83%A9.gif\" alt=\"\" class=\"wp-image-3403\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Crushing to Below the Specified Size<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">When necessary, a self-propelled jaw crusher is used to crush material to below the specified size.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E8%A7%A3%E4%BD%93%E3%82%AC%E3%83%A9%E3%83%91%E3%82%B4%E3%82%B91.gif\" alt=\"\" class=\"wp-image-3404\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Backfilling with Demolition-Generated Soil<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The finely crushed soil produced through the above steps is reused on site as backfill material.<br>\nThis maintains favorable ground conditions and reduces ground improvement costs during reconstruction.<br>\nIn addition, reductions in imported soil and industrial waste volumes contribute to overall cost savings.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full ptn_fig\"><img decoding=\"async\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/%E8%A7%A3%E4%BD%93%E3%82%AC%E3%83%A9%E3%83%91%E3%82%B4%E3%82%B92.gif\" alt=\"\" class=\"wp-image-3405\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>An Environmentally Conscious Foundation Method from Construction to Demolition The TNF 2.0 method is an environmentally conscious construction method not only during construction, but also at the time of building removal and reconstruction. Environmental Considerations During Construction Reduction of Excavated Surplus Soil With conventional pile foundation methods, much of the surplus soil generated during excavation [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4709,"parent":3173,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3175","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3175","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/comments?post=3175"}],"version-history":[{"count":6,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3175\/revisions"}],"predecessor-version":[{"id":4700,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3175\/revisions\/4700"}],"up":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3173"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/media\/4709"}],"wp:attachment":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/media?parent=3175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}