{"id":20076,"date":"2026-01-17T11:23:13","date_gmt":"2026-01-17T10:23:13","guid":{"rendered":"https:\/\/www.darda.de\/?page_id=20076"},"modified":"2026-06-11T14:51:03","modified_gmt":"2026-06-11T12:51:03","slug":"anchoring-pressure","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/anchoring-pressure","title":{"rendered":"Anchoring pressure"},"content":{"rendered":"
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Anchoring pressure describes the local pressure that an anchor, an expansion element, a gripper, or a brace introduces into a substrate. In concrete demolition, natural stone extraction, and tunnel construction, this parameter is crucial for safely and controllably introducing forces from hydraulic systems into concrete, masonry, or rock. Especially with rock and concrete splitters<\/a> and with concrete demolition shears such as the Darda Combi-Shears HCS8<\/a> from Darda GmbH, anchoring pressure significantly influences efficiency, component protection, and occupational safety. In technical literature, anchoring pressure is also described as contact pressure or local bearing pressure and is directly linked to controlled crack initiation, avoidance of collateral damage, and predictable load paths.<\/p>\n

Definition: What is meant by anchoring pressure?<\/h2>\n

Anchoring pressure is the area-related compressive stress (contact pressure) introduced into the substrate by an anchoring or bracing component. It arises, for example, from expansion wedges in a borehole, from the jaws of a shear, or from braces that take up reaction forces. Functionally<\/em>, anchoring pressure governs whether the substrate experiences predominantly crushing, spalling, or cracking<\/strong> in the near-contact zone. It is the decisive parameter for assessing the substrate\u2019s load-bearing capacity against localized failure and for shaping the controlled introduction of forces from hydraulic drives. Typical units are N\/mm\u00b2 or MPa, and the effective value depends on the real, load-bearing contact zone rather than the nominal component size.<\/p>\n

Relevance in concrete demolition and specialized deconstruction<\/h2>\n

In concrete demolition and specialized deconstruction, high forces must often be applied to sensitive structures. Whether splitting reinforced concrete through boreholes or crushing with concrete demolition shears, anchoring pressure determines how safely loads are transferred without causing impermissible damage to the substrate. Optimally adjusted anchoring pressure increases process reliability, limits consequential damage (e.g., edge spalling), and improves the controllability of splitting or crushing operations, for example during strip-out and when cutting components. It also supports low-vibration and low-noise work sequences where adjacent structures, installations, or traffic routes must remain protected.<\/p>\n

Physical principles and influencing factors<\/h2>\n

Anchoring pressure results from the acting force and the effective contact area. It is governed by material properties and boundary conditions. Key influencing factors are:<\/p>\n