{"id":922,"date":"2025-09-25T11:19:31","date_gmt":"2025-09-25T09:19:31","guid":{"rendered":"https:\/\/powermining.fi\/?page_id=922"},"modified":"2026-10-01T07:32:00","modified_gmt":"2026-10-01T05:32:00","slug":"rock-grouting","status":"publish","type":"page","link":"https:\/\/powermining.fi\/en\/palvelut\/kallion-injektointi\/","title":{"rendered":"Rock Grouting in Tunnel Construction"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Rock grouting is an essential part of safe and sustainable tunnel construction. It is used to reduce the permeability of the rock and improve its sealing properties. The goal is to prevent water <\/span><span style=\"font-weight: 400;\">from migrating through the rock structure, which extends the service life of the structure.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Well-grouted rock is efficient and safe to excavate. Grouting can also prevent the groundwater table from dropping as a result of excavation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In the grouting process, grout is pumped under pressure into grouting holes drilled into the rock, filling cracks and fissures. <\/span><span style=\"font-weight: 400;\">Pumppauksessa s\u00e4\u00e4delty injektointipaine varmistaa massan levi\u00e4misen suunnitelman mukaisesti. Useimmiten k<\/span><span style=\"font-weight: 400;\">The most commonly<\/span>\u00a0<span style=\"font-weight: 400;\">used grouting materials are fine-grained grouting cement or various chemical grouting agents.<\/span><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Different grouting methods <\/span><span style=\"font-weight: 400;\">and materials used<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Depending on the site, we use different grouting methods and <\/span><span style=\"font-weight: 400;\">materials.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Pre-grouting<\/strong> on rakenteen tiivist\u00e4misen kannalta t\u00e4rkein vaihe, ja se tehd\u00e4\u00e4n aina ennen tunnelin louhintaa. Tavoitteena on tiivist\u00e4\u00e4 kallio haluttu metrim\u00e4\u00e4r\u00e4 eteenp\u00e4in, jotta rakoilusta ja veden virtaamisesta ei syntyisi ongelmia louhinnan j\u00e4lkeen.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Post-grouting<\/strong> voidaan lis\u00e4t\u00e4 kallion tiiviytt\u00e4 halutuilla alueilla. Sit\u00e4 tehd\u00e4\u00e4n yleens\u00e4, jos halutaan tiivist\u00e4\u00e4 yksitt\u00e4isi\u00e4 vuotovesikohtia louhinnan j\u00e4lkeen.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>The primary grouting material is almost always a fine-grained grouting cement mix.<\/strong>However, grouting can also be performed with chemical agents. This is commonly referred to as chemical grouting, <\/span><span style=\"font-weight: 400;\">jossa k\u00e4ytett\u00e4v\u00e4 aine on hartsipohjainen. T\u00e4m\u00e4 menetelm\u00e4 soveltuu erityisesti pieniin rakoihin ja nopeaa kovettumista vaativiin kohteisiin, joihin sementtipohjainen injektointiaine ei sovellu.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400;\">Check out our reference projects<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Power Mining covers every phase of rock construction \u2013 check out our reference projects via the link. <\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Mining, rock support, scaling and loading. We engage in all phases of rock construction.<\/p>","protected":false},"author":5,"featured_media":339,"parent":89,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-922","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/pages\/922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/comments?post=922"}],"version-history":[{"count":15,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/pages\/922\/revisions"}],"predecessor-version":[{"id":1019,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/pages\/922\/revisions\/1019"}],"up":[{"embeddable":true,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/pages\/89"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/media\/339"}],"wp:attachment":[{"href":"https:\/\/powermining.fi\/en\/wp-json\/wp\/v2\/media?parent=922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}