{"id":19224,"date":"2025-09-16T10:18:21","date_gmt":"2025-09-16T08:18:21","guid":{"rendered":"https:\/\/www.darda.de\/base-load"},"modified":"2026-04-13T10:05:03","modified_gmt":"2026-04-13T08:05:03","slug":"base-load","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/base-load","title":{"rendered":"Base load"},"content":{"rendered":"<div class=\"wissen-inhaltsbereich\">\n<p>Base load describes the permanently present, non-avoidable load or power demand in a system. In the context of deconstruction, demolition, and extraction, this concerns two levels: the <em>permanent loads<\/em> in structures and rock, and the <em>baseline demand<\/em> for pressure and flow rate in hydraulic drives. Anyone who wants to use concrete demolition shears, <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-rock-and-concrete-splitters\">rock and concrete splitters<\/a>, or <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-power-units\">hydraulic power packs<\/a> safely and efficiently must combine both perspectives: the base load in the material and the base load in the drive. Correctly quantifying and managing these baselines improves tool response, thermal stability, and the reproducibility of cuts and splits across entire work cycles.<\/p>\n<h2>Definition: What is meant by base load?<\/h2>\n<p><strong>Base load<\/strong> is the portion of load or power that occurs continuously, independent of short-term peaks. In the structural system, these are permanent loads such as self-weight, support and composite loads; in rock, the in-situ stresses. In hydraulics, base load denotes the unavoidable pressure and power demand of a hydraulic power pack in idle or holding mode, including flow losses, leakage gap losses, and control pressure. Typical contributors are internal pump slip, valve control requirements, and recirculation through safety functions. This base load forms the starting point for any working load, for example when closing a concrete demolition shear or generating splitting forces with rock and concrete splitters, and it defines the baseline for cycle-time and temperature management.<\/p>\n<h2>Base load in day-to-day deconstruction: hydraulics and structure in interaction<\/h2>\n<p>In practice, the permanent loads of the structure or rock act together with the hydraulic base load. Before splitting cylinders are set or concrete demolition shears are applied, load paths, supports, and constraints must be understood. In parallel, the hydraulic power pack is configured to meet the base load demand efficiently while providing sufficient reserves for load peaks. The balance between structural base load and power pack base load determines cycle time, cutting sequence, tool selection, component integrity, and energy efficiency.<\/p>\n<ul>\n<li><em>Planning impact:<\/em> Base load governs shoring needs, panel sizing, and the order of cuts and splits.<\/li>\n<li><em>Operational impact:<\/em> Standby pressure and flow define responsiveness, tool holding force, and heat input.<\/li>\n<li><em>Quality impact:<\/em> Stable baselines reduce uncontrolled cracking and improve surface quality at edges.<\/li>\n<\/ul>\n<h2>Base load in hydraulic systems: significance for power packs and tools<\/h2>\n<p>Hydraulic power packs deliver pressure and flow. Even at idle, there is a base load from recirculation losses, control pressure, and throttling losses. This affects temperature, energy demand, and the response time of tools, for example of <strong>concrete demolition shears<\/strong> or <strong>rock and concrete splitters<\/strong>. System architecture &#8211; open center, closed center, or load-sensing &#8211; and the choice of components strongly influence the magnitude and stability of this base load.<\/p>\n<h3>Standby pressure and flow rate<\/h3>\n<p>A minimum pressure is maintained so that valves switch, shears hold, and split wedges can be positioned in a controlled manner. Excessive standby pressure increases heat generation; too low reduces responsiveness and holding force. The goal is a <em>demand-oriented<\/em> base load point with stable control. Accumulators and pressure-compensated valves can dampen transients, while precise setting of relief and makeup functions limits overshoot and hysteresis during positioning.<\/p>\n<h3>Energy efficiency and temperature balance<\/h3>\n<p>The hydraulic base load directly affects energy consumption. Optimized line cross-sections, short hose lengths, low throttling shares, and suitable pump characteristics reduce idle losses. A good temperature balance protects seals and reduces viscosity effects &#8211; important for uniform splitting and cutting forces. Oil selection and cooling capacity must be matched to ambient conditions and duty cycle to keep operating temperatures in the optimal window.<\/p>\n<ul>\n<li>Use variable delivery or load-sensing concepts where suitable to minimize recirculation at idle.<\/li>\n<li>Reduce pressure drops with large-bore quick couplers, clean filters, and gentle routing of hoses.<\/li>\n<li>Select hydraulic fluids with appropriate viscosity index and maintain correct oil levels.<\/li>\n<li>Monitor temperatures at tank, return lines, and critical valves to verify the thermal balance.<\/li>\n<\/ul>\n<h3>Safety and pressure limitation<\/h3>\n<p>Pressure relief and check functions protect the system and operators from impermissible conditions. The design follows recognized engineering practice and is matched to the maximum closing, cutting, and splitting forces. Where relevant, over-center and anti-cavitation measures prevent runaways and vacuum damage during rapid movements. Clean couplings, intact hoses, and correctly rated fittings are essential. Notes do not replace an individual hazard assessment.<\/p>\n<h2>Base load in structures and rock: understanding load paths<\/h2>\n<p>Permanent loads (self-weight, support reactions, prestress) and the stress states present in rock form the base load against which work is performed. Those who know the load paths can place <strong>rock splitting cylinders<\/strong> precisely, apply <strong>concrete demolition shears<\/strong> safely, and plan cutting sequences to avoid uncontrolled cracking. Consider constraints from adjacent components, stiffness jumps, and changes in support conditions during progressive removal.<\/p>\n<h3>Load transfer and cutting sequence<\/h3>\n<p>Before the first cut, the load transfer is defined: Where are the supports? Which components are contributing? Only then does the cutting and splitting sequence follow. A common, proven approach is to proceed from relieved areas to highly loaded nodes, accompanied by temporary shoring. Sequence plans and hold points help to verify that redistributions remain within acceptable limits at each stage.<\/p>\n<h3>Splitting tension versus compressive load<\/h3>\n<p>Splitting tools preferably work along existing planes of weakness. If a component is highly loaded in compression, it tends to close split openings. In that case, small-area pre-openings, controlled relief cuts, or switching to segmented split points help. Adjusting wedge orientation and staging the introduction of force improves crack guidance and reduces rebound effects.<\/p>\n<h3>Edge distances, reinforcement, prestressing<\/h3>\n<p>Reinforcement and prestressing redirect loads and can deflect split fronts. Sufficient edge distances, pilot drillings, and a deliberate approach to reinforcement anchors increase safety and precision when using concrete demolition shears and splitters. Non-destructive checks for reinforcement and tendon paths, combined with adherence to applicable detailing rules, support predictable behavior at edges and openings.<\/p>\n<h2>Determining the base load: methods and key parameters<\/h2>\n<p>The determination of base load depends on the task and relies fundamentally on measurement, calculation, and experience.<\/p>\n<ul>\n<li>Structure: As-built survey, material properties, geometry, load assumptions according to recognized standards; deformation or crack monitoring if required; verification of temporary support stiffness.<\/li>\n<li>Rock: Geological profile, stratifications, joint sets, in-situ stresses; test boreholes and simple orientation trials; assessment of water conditions and weathering.<\/li>\n<li>Hydraulics: Measurement of pressure, temperature, and flow in standby and partial load; assessment of leakage shares and response times; validation of relief and check settings.<\/li>\n<\/ul>\n<p>Combining these data yields a robust baseline model that can be updated during execution as measurements and observations refine the assumptions.<\/p>\n<h2>Practical guide: from base load to work planning<\/h2>\n<ol>\n<li>Existing conditions analysis: structure\/rock, accessibility, media, safety zones; constraints from neighbors and environment.<\/li>\n<li>Load model: permanent loads, partial loads, potential load redistributions; influence of removal stages.<\/li>\n<li>Method selection: cutting, splitting, shear operation &#8211; combined according to target geometry; consider vibration, dust, and noise limits.<\/li>\n<li>Tool sizing: closing and splitting forces, strokes, cutting lengths; cycle times and permissible heat input.<\/li>\n<li>Power pack design: base load point, delivery flow, pressure reserve, cooling; compatibility of couplings and hose sets.<\/li>\n<li>Cutting and splitting sequence: from relieved to loaded; intermediate shoring; definition of hold points for verification.<\/li>\n<li>First step and control: trial cut\/trial split, check measurements; adjust standby settings if required.<\/li>\n<li>Cycling and monitoring: observe temperature, pressure profile, crack and deformation behavior; document deviations and corrective actions.<\/li>\n<\/ol>\n<h2>Application examples: accounting for base load correctly<\/h2>\n<h3>Concrete demolition of a reinforced concrete slab<\/h3>\n<p>The slab carries permanent loads from self-weight and attachments. After temporary shoring, the base load is reduced. Subsequently, multi-cutters cut the edges, and concrete demolition shears release panels in controlled sections. The hydraulic power pack maintains a moderate standby pressure to limit heat while still providing holding force. Edge protection and controlled panel sizes stabilize load paths, while short idle phases between cycles keep oil temperature within the planned band.<\/p>\n<h3>Natural stone extraction in the quarry<\/h3>\n<p>In-situ stresses and joint systems define the base load in the rock. <strong>Rock and concrete splitters<\/strong> utilize joint orientations. Pre-drilling with appropriate spacing guides the split front. A steady hydraulic base load point prevents jerky load peaks and delivers reproducible splitting results. Logging pressure and temperature during test splits helps fine-tune the baseline for the subsequent production sequence.<\/p>\n<h3>Cross passage in tunneling<\/h3>\n<p>Lateral pressure and overburden form the base load in the rock mass. Segmented splitting with rock splitting cylinders and concurrent support limits redistributions. Hydraulic power packs operate with a stable base load and sensitive control to proceed in a controlled manner within confined space. Short hoses, clean couplers, and careful sequencing reduce pressure drop and improve positioning accuracy.<\/p>\n<h2>Distinction: base load, partial load, and load peaks<\/h2>\n<p>Base load is permanent. Partial load describes the variable range above it when tools are actively working but not yet at maximum. Load peaks occur briefly, for example when cutting through particularly tough reinforcement or during the initial setting of split wedges. For planning and power pack design the rule is: base load efficient, partial load stable, peaks safely controllable. Recording these ranges with onboard gauges or data loggers supports proactive adjustments.<\/p>\n<h2>Typical mistakes and how to avoid them<\/h2>\n<ul>\n<li>Unclear load paths: clarify load redistributions and support reactions before starting.<\/li>\n<li>Excessive standby pressure: leads to heat and inefficient operation; adjust the base load point.<\/li>\n<li>Missing intermediate shoring: base load in the component remains too high; risk of collapse or cracking.<\/li>\n<li>Unsuitable cutting sequence: split front runs uncontrolled; revise the sequence.<\/li>\n<li>Ignored reinforcement\/prestressing: possible tool overload; plan pre-openings and cutting strategies.<\/li>\n<li>Uncalibrated or contaminated hydraulic interfaces: inaccurate readings and high pressure losses; clean and verify couplings, filters, and gauges.<\/li>\n<\/ul>\n<h2>Sizing splitting and shear operations from the base load<\/h2>\n<p>Target forces, edge distances, and piece sizes are derived from the structural or rock base load. This yields closing forces for <strong>concrete demolition shears<\/strong> and splitting forces for <strong>rock and concrete splitters<\/strong>. The hydraulic power pack is designed so that base-load operation is efficient while also providing sufficient reserve for working phases. Appropriate safety margins, realistic duty cycles, and verified standby settings complete the sizing process.<\/p>\n<h2>Safety and responsibility<\/h2>\n<p>Work on the load-bearing system or in rock is carried out on the basis of appropriate planning and in compliance with recognized engineering practice. Assessing the base load and its effects requires expertise. The information provided is general and does not replace case-by-case verification. Applicable regulations, exclusion zones, and lockout measures must be defined and enforced throughout execution.<\/p>\n<h2>Documentation and verification<\/h2>\n<p>Documentation includes load assumptions, measurements at standby and under load, tool and power pack parameters, as well as the cutting and splitting sequence actually executed. Clean traceability supports quality, safety, and the optimization of future projects. Photographic evidence, annotated sketches, and structured logs of pressure, flow, and temperature provide a reliable basis for later evaluation.<\/p>\n<h2>Checklist: keeping the base load in view<\/h2>\n<ul>\n<li>Permanent loads in the component\/rock mass identified?<\/li>\n<li>Hydraulic base load (pressure\/flow) measured and assessed?<\/li>\n<li>Intermediate shoring and sequence defined?<\/li>\n<li>Tool and power pack reserves available for peaks?<\/li>\n<li>Monitoring of temperatures, pressures, and crack patterns set up?<\/li>\n<li>Relief and maximum working pressures validated against tool ratings?<\/li>\n<li>Interfaces and couplings clean, leak-free, and pressure-drop optimized?<\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Base load describes the permanently present, non-avoidable load or power demand in a system. In the context of deconstruction, demolition, and extraction, this concerns two levels: the permanent loads in structures and rock, and the baseline demand for pressure and flow rate in hydraulic drives. Anyone who wants to use <a class=\"moretag\" href=\"https:\/\/www.darda.de\/en\/knowledge\/base-load\">read more&#8230;<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"parent":14846,"menu_order":0,"comment_status":"open","ping_status":"open","template":"tmpl\/template-wissen.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-19224","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Base Load in Hydraulics &amp; Structural Demolition<\/title>\n<meta name=\"description\" content=\"Master base load in demolition and hydraulics \u2713 permanent structural loads &amp; hydraulic standby for safe, efficient work.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.darda.de\/en\/knowledge\/base-load\" 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