{"id":9272,"date":"2022-09-12T10:25:28","date_gmt":"2022-09-12T08:25:28","guid":{"rendered":"https:\/\/www.darda.de\/einsatzbericht-stein-und-betonspaltzylinder-c9-tunneling"},"modified":"2025-07-02T14:30:22","modified_gmt":"2025-07-02T12:30:22","slug":"job-report-rock-and-concrete-splitter-c9-tunneling","status":"publish","type":"post","link":"https:\/\/www.darda.de\/en\/job-report-rock-and-concrete-splitter-c9-tunneling","title":{"rendered":"Rock- and Concrete Splitter C9 Tunneling"},"content":{"rendered":"\t\t\t<section  class=\"content-section    stretch-row pt-40-xs pt-50-md pt-70-lg  no-margin\"    >\n\n\t\t\t\t<div class=\"row  \">\n\n\t\t\t\t\t[vc_column offset=&#8221;vc_col-md-offset-2 vc_col-md-8&#8243;][vc_column_text vc_rwd=&#8221;hidden-md-down&#8221;]\n<h3 class=\"ls-text-uppercase fw-extra-light size18\">Job report \u2013 Rock and Concrete Splitter C9<\/h3>\n[\/vc_column_text][ls_vc_spacer vc_height_rwd=&#8221;0&#8243;][vc_column_text vc_rwd=&#8221;hidden-md-up&#8221;]\n<h3 class=\"ls-text-uppercase fw-extra-light size18\">Job report \u2013 Rock and<br \/>\nConcrete Splitter C9<\/h3>\n[\/vc_column_text][vc_column_text vc_rwd=&#8221;hidden-md-down&#8221;]\n<h2 class=\"ls-text-uppercase ff-secondary ls-hyphenate ls-no-margin-bottom\">Tunnel extension<br \/>\nin a dam<\/h2>\n[\/vc_column_text][vc_column_text vc_rwd=&#8221;hidden-md-up&#8221;]\n<h2 class=\"ls-text-uppercase ff-secondary ls-hyphenate\">Tunnel<br \/>\nextension<br \/>\nin a dam<\/h2>\n[\/vc_column_text][vc_column_text]A tunnel that led through a dam had to be enlarged.<br \/>\nA concrete layer exactly 0.5 m thick had to be removed from each of the floor, walls and ceiling.<\/p>\n<p>This layer was not allowed to be thicker than 0.5 m under any circumstances, which meant that precision was required. Very strong vibrations inside the tunnel also had to be avoided so as not to endanger the dam.<\/p>\n<p>The tunnel was about 18 m long, 6 m wide and 5 m high and reinforced with 16 mm thick iron. First, diamond saws were used to cut through the entire length of the tunnel with saw cuts exactly 0.5 m deep. Cross sections were made every 2 m. A hole was drilled in each piece after 1 m, i.e. halfway along the length. Two Darda C9 N splitting cylinders and a portable Darda high-pressure hydraulic unit with electric motor then simply split out the pieces. The saw cuts ensured that no pieces thicker than 0.5 m broke out.[\/vc_column_text][\/vc_column]\n\t\t\t\t<\/div>\n\n\t\t\t\t\n\t\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/section>\n\n\t\t\t\t<section  class=\"content-section pb-60-xs pb-70-sm pb-80-md pb-120-lg pb-160-xl   pt-40-xs pt-50-md pt-70-lg  no-margin\"    >\n\n\t\t\t\t<div class=\"row  row--column-gap-50\">\n\n\t\t\t\t\t[vc_column el_id=&#8221;anwenderorientiert&#8221;]\t\t<div  class=\"ls-vc-image wpb_content_element \">\n\n\t\t\t\n\t\t\t\t<div class=\"image ls-text-center-xs ls-text-center-sm ls-text-center-md ls-text-center-lg ls-text-center-xl\">\n\n\t\t\t\t\t<div class=\"image__img \">\n\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t<span class=\"image_wrap\">\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\"  src=\"https:\/\/www.darda.de\/wp-content\/uploads\/2022\/09\/einsatzbericht-c9-tunneling-1.jpg\" alt=\"\" width=\"1024\" height=\"1400\">\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t<\/div><!-- end \/.image__img -->\n\n\t\t\t\t<\/div><!-- end \/.image -->\n\n\t\t\t\n\t\t<\/div><!-- end \/.ls-vc-image -->\n\n\t\t[\/vc_column]\n\t\t\t\t<\/div>\n\n\t\t\t\t\n\t\t\t\t\n\t\t\t\n\t\t\t\n\t\t<\/section>\n\n\t\n","protected":false},"excerpt":{"rendered":"<p>Tunnel extension in a dam<\/p>\n","protected":false},"author":3,"featured_media":6601,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[87],"tags":[],"class_list":["post-9272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-job-report"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C9 Splitter for tunnel development | Darda GmbH<\/title>\n<meta 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