{"id":19231,"date":"2025-09-16T12:59:26","date_gmt":"2025-09-16T10:59:26","guid":{"rendered":"https:\/\/www.darda.de\/foundation-type"},"modified":"2026-04-13T12:16:02","modified_gmt":"2026-04-13T10:16:02","slug":"foundation-type","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/foundation-type","title":{"rendered":"Foundation type"},"content":{"rendered":"<div class=\"wissen-inhaltsbereich\">\n<p>The foundation type describes how structures safely transfer their loads into the subsoil. It shapes planning, construction, and later deconstruction. Especially in existing structures, during <strong><a href=\"https:\/\/www.darda.de\/en\/applications\/concrete-demolition-and-special-deconstruction\">concrete demolition and deconstruction<\/a><\/strong>, the chosen foundation influences which separating or splitting methods are suitable &#8211; for example, deploying a <em>concrete pulverizer<\/em> for reinforced concrete foundations or <em><a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-rock-and-concrete-splitters\">rock and concrete splitters<\/a><\/em> for massive blocks and in sensitive environments. For Darda GmbH, the relationship between foundation, material, and subsoil is central, because it defines requirements for hydraulics, cutting, and splitting technology in the application areas <em>building gutting and concrete cutting<\/em>, <em>rock excavation and tunnel construction<\/em>, <em>natural stone extraction<\/em>, and <em>special demolition<\/em>. Early identification of the foundation type enables method selection with reduced emissions, predictable cycle times, and fewer rework steps across the project.<\/p>\n<h2>Definition: What is meant by the foundation type?<\/h2>\n<p>Foundation type refers to the structural solution by which building loads are transmitted into the ground. A basic distinction is made between <strong>shallow foundations<\/strong> (e.g., isolated footings, strip footings, floor slabs) and <strong>deep foundations<\/strong> (e.g., piles, diaphragm walls, well or caisson foundations). Decisive factors include subsoil bearing capacity, settlement behavior, groundwater, the environment\u00e2\u0080\u0099s sensitivity to vibration, and the loads of the structure. The foundation type influences material selection, degree of reinforcement, geometry, and accessibility &#8211; and thus the later <em>deconstruction method<\/em> and the choice of separating, cutting, or splitting tools.<\/p>\n<ul>\n<li><strong>Load transfer and stiffness:<\/strong> magnitude and distribution of vertical loads, moments, and dynamic effects.<\/li>\n<li><strong>Subsoil parameters:<\/strong> bearing strata depth, compressibility, groundwater level, obstruction risk.<\/li>\n<li><strong>Constructive details:<\/strong> reinforcement content, embedded parts, anchors, and interfaces to adjacent components.<\/li>\n<li><strong>Site constraints:<\/strong> space, access, neighboring structures, vibration and noise limits.<\/li>\n<li><strong>Deconstruction targets:<\/strong> piece sizes, recycling strategy, permissible crack control and lift-out options.<\/li>\n<\/ul>\n<h2>Types of foundations at a glance<\/h2>\n<p>The most important foundation types can be considered systematically to derive suitable construction and deconstruction procedures. Material, component thickness, and accessibility are just as decisive as the surrounding subsoil.<\/p>\n<ul>\n<li><strong>Shallow foundations:<\/strong> near-surface load transfer; typically accessible from above and the sides, often suitable for controlled splitting with subsequent mechanical processing.<\/li>\n<li><strong>Deep foundations:<\/strong> load transfer into deeper strata; access and segmentation are more complex and frequently require staged exposure, pre-drilling, and low-vibration techniques.<\/li>\n<\/ul>\n<h2>Shallow foundations: footing types and deconstruction implications<\/h2>\n<p>Shallow foundations transfer loads near the surface into load-bearing soil. They are common in building construction and plant construction. In existing assets, attention must be paid to under-slab utilities, potential post-tensioned elements, and connection details to walls or columns.<\/p>\n<h3>Isolated footing<\/h3>\n<p>Pad footing of concrete or reinforced concrete beneath columns or machines. During deconstruction, reinforcement densities and <em>anchorage<\/em> must be considered. <strong>Concrete pulverizers<\/strong> act in a controlled manner at edges and reduce cross-sections, while <em>rock wedge splitter and concrete splitter<\/em> break up large blocks with <strong>low vibration levels<\/strong> &#8211; useful near sensitive neighboring structures in <em>special demolition<\/em>. Predrilled splitting holes with defined spacing create preferential crack paths; exposed bars are then separated in sequence to maintain stability and manageable piece sizes.<\/p>\n<h3>Strip footing<\/h3>\n<p>Linear footing beneath walls. Uniform thickness, often with continuous reinforcement. Removing longer sections succeeds with sectional pulverizer processing followed by splitting; with masonry bearing, the masonry bond can first be released before the reinforced concrete is separated. Monitoring of adjacent wall stability and staged shoring avoids unintended settlements during progressive removal.<\/p>\n<h3>Floor slab<\/h3>\n<p>Area slabs distribute loads over a wide area. In deconstruction of existing structures, emissions (noise, dust, vibration) must be minimized. Splitting techniques with hydraulic <em>rock wedge splitters<\/em> limit crack propagation; <strong>Concrete pulverizers<\/strong> or <em>Multi cutters<\/em> handle separation of reinforcement. <em>Hydraulic power packs<\/em> provide the required energy supply &#8211; even in areas with limited electrical power. Potential post-tensioned tendons, dowels, and thickenings at columns or edges require targeted investigation; segmentation along joints and predetermined breaking lines improves control.<\/p>\n<h2>Deep foundations: piles, diaphragm walls, and special requirements<\/h2>\n<p>Deep foundations transfer loads into deeper, load-bearing strata. This influences not only construction but also deconstruction. Water ingress, confined spaces, and noise or vibration limits frequently necessitate low-spark, low-vibration methods with precise crack control and staged lifting concepts.<\/p>\n<h3>Pile foundation<\/h3>\n<p>Bored or driven supports made of reinforced concrete, steel, or wood. When deconstructing reinforced concrete piles, a combination of preferential fracture lines created by splitting techniques followed by pulverizer processing is often used. Steel piles can be cut in sections with <a href=\"https:\/\/www.darda.de\/en\/product-overview\/steel-shears\">Steel Shears<\/a>; in <em>special demolition<\/em> with tight working space, compact <em>high-pressure hydraulic system<\/em> solutions are advantageous. For prestressed or pre-tensioned elements, controlled exposure and staged cutting are essential to safely release stored energy.<\/p>\n<h3>Diaphragm wall and cut-off wall<\/h3>\n<p>Massive, continuous walls of reinforced concrete. Removal requires a sequential approach: exposing edges, segmenting, lifting. <strong>Concrete pulverizers<\/strong> reduce cross-sections; for thicker sections, the combination of pre-drilling and hydraulic splitting creates a controlled crack path.<\/p>\n<ul>\n<li>Survey reinforcement layout and existing joints; define segment geometry.<\/li>\n<li>Predrill splitting holes; apply <em>rock wedge splitter and concrete splitter<\/em> to initiate cracks.<\/li>\n<li>Narrow the section with pulverizer jaws; separate reinforcement in a defined order.<\/li>\n<li>Lift and remove segments with suitable rigging and verified pick points.<\/li>\n<\/ul>\n<h3>Well and caisson foundations<\/h3>\n<p>Hollow-body or shaft solutions for soft soils or high groundwater. Deconstruction must ensure the stability of surrounding areas. Low-vibration methods such as <em>rock wedge splitter and concrete splitter<\/em> minimize risks for neighboring buildings and utilities. Additional measures include ventilation and gas monitoring in confined spaces, groundwater control, and staged backfilling to maintain global stability.<\/p>\n<h2>Influence of foundation type on deconstruction and separation methods<\/h2>\n<p>Method selection depends on cross-section, reinforcement, accessibility, subsoil, and boundary conditions. For heavily reinforced components, separating methods such as shears or pulverizers dominate; massive, lightly reinforced sections can be split economically. In proximity to sensitive installations, <strong>low vibration levels<\/strong> and low-spark methods are advantageous, such as hydraulic splitting instead of percussion tools.<\/p>\n<ul>\n<li><strong>Thin to medium sections with dense reinforcement:<\/strong> controlled nibbling with <strong>Concrete pulverizers<\/strong>, reinforcement separation with <em>steel shear<\/em>.<\/li>\n<li><strong>Massive blocks with low reinforcement:<\/strong> pre-drilling and splitting for volume reduction, then targeted pulverizing.<\/li>\n<li><strong>Restricted access or interior work:<\/strong> compact tools powered by <em>hydraulic power packs<\/em>, emphasis on emission control.<\/li>\n<li><strong>Water-bearing or sensitive subsoil:<\/strong> low-vibration segmentation to prevent settlement or crack propagation in adjacent structures.<\/li>\n<\/ul>\n<h2>Tools and methods in the context of the foundation<\/h2>\n<p>Typical tool combinations result from the interplay of foundation type and application area. Crucial are controllable fracture patterns, minimal secondary damage, and safe handling. Compatibility of jaw sets, hydraulic parameters, and carrier machines determines productivity and cut quality.<\/p>\n<h3>Concrete pulverizer for footing and wall removal<\/h3>\n<p><strong>Concrete pulverizers<\/strong> are suitable for breaking reinforced concrete in <em>concrete demolition and special demolition<\/em>. They create defined fractures, expose reinforcement, and reduce piece sizes for logistics. In combination with <em>steel shears<\/em>, exposed reinforcing steel can be separated precisely. Interchangeable jaw profiles and appropriate closing forces improve bite performance on thick sections and reduce cycle times.<\/p>\n<h3>Rock wedge splitter and concrete splitter for low-vibration segmentation<\/h3>\n<p><em>Rock wedge splitters and concrete splitters<\/em> create controlled cracks through hydraulic spreading forces. This is especially useful in tight interior areas (<em>building gutting and concrete cutting<\/em>), on heritage-protected assets, or near sensitive infrastructure. Also in <em>rock excavation and tunnel construction<\/em>, rock heads or concrete blocks can be released in a targeted manner. Defined drilling patterns optimize energy input and crack guidance while limiting secondary damage.<\/p>\n<h3>Hydraulic power pack as energy source<\/h3>\n<p><em>Hydraulic power packs<\/em> supply pulverizers, shears, and splitting cylinders with pressure and flow. Sizing follows tool demand, hose lengths, and the operating environment. Indoors, exhaust and noise emissions must be considered.<\/p>\n<ul>\n<li>Specify <strong>flow and pressure<\/strong> to match tool curves; consider duty cycle and cooling capacity.<\/li>\n<li>Dimension <strong>hose lengths<\/strong> and quick couplers to minimize pressure loss and heat build-up.<\/li>\n<li>Ensure <strong>filtration<\/strong> and oil cleanliness for valve and cylinder longevity.<\/li>\n<li>Evaluate <strong>power supply<\/strong> options (electric or engine-driven) in line with site emission rules.<\/li>\n<\/ul>\n<h3>Combination shears and Multi cutters for mixed materials<\/h3>\n<p><em>Combination shears<\/em> and <em>Multi cutters<\/em> separate alternating material composites, as encountered when deconstructing foundations with embedded components. They reduce tool changes and support a swift workflow. Proper sequencing &#8211; concrete reduction, exposure, then cutting of inserts &#8211; limits unplanned fracture paths and preserves interfaces for sampling.<\/p>\n<h3>Steel shear for reinforcement, sections, and piles<\/h3>\n<p><em>Steel shears<\/em> cut bundles of reinforcement, steel sections, or steel piles, for example during the dismantling of deep-founded structures. In combination with concrete pulverizers, an efficient material flow from concrete to steel separation is achieved. Compared to hot cutting, mechanical shearing reduces sparks and fumes and facilitates immediate material sorting.<\/p>\n<h3>Cutting torch in the context of equipment foundations<\/h3>\n<p><em>Cutting torches<\/em> are used during the deconstruction of tank installations. After separating the vessels, foundation works often follow: ring foundations, <em>machine foundations<\/em>, or pedestals can then be removed with <em>rock wedge splitter and concrete splitter<\/em> and <strong>concrete pulverizer<\/strong> &#8211; a typical sequence in <em>special demolition<\/em>. Hot-work permits, fire watches, and shielding measures are integral to safe operations where torches are employed.<\/p>\n<h2>Subsoil, material, and foundation: effects on the approach<\/h2>\n<p>The subsoil determines foundation type and thus deconstruction strategy. Cohesive soils, non-cohesive sands, rock, or weathered zones react differently to vibration, water, and load redistribution. In rocky subsoil, in-situ rock can be selectively released with <em>rock wedge splitter<\/em>, as is common in <em>natural stone extraction<\/em>. For high-strength reinforced concrete, pre-drilling is helpful to place splitting wedges and define crack lines. Where groundwater or soft strata are present, staged relief and backfilling maintain global stability and prevent settlements.<\/p>\n<h2>Planning and permitting for deconstruction of foundations<\/h2>\n<p>Before starting, structural analysis, utility plans, soil parameters, and groundwater level must be reviewed. Depending on the project, permits and notices may be required. Specifications for occupational safety, waste segregation, and handling of potential hazardous substances must be defined early. These notes are general and do not replace case-by-case assessment.<\/p>\n<ul>\n<li>Verify structural capacity of temporary states and the <em>work platform<\/em>.<\/li>\n<li>Clarify disposal routes and documentation for concrete, <em>reinforcing steel<\/em>, and embedded components.<\/li>\n<li>Plan access, lifting zones, and traffic routes for removal and interim storage.<\/li>\n<li>Define monitoring requirements for vibration, dust, and groundwater.<\/li>\n<\/ul>\n<h2>Occupational safety, emissions, and environmental protection<\/h2>\n<p>Safe access, stable intermediate states, and controlled load paths have priority. Low-vibration methods reduce risks for adjacent structures. Dust and noise control, containment of cooling or hydraulic fluids, and orderly <em>waste management chain<\/em> (concrete, <em>reinforcing steel<\/em>, built-in components) are standard. Hydraulic methods support low-spark, controlled separation and splitting processes.<\/p>\n<ul>\n<li>Establish exclusion zones, lifting plans, and tag-line use for suspended loads.<\/li>\n<li>Implement water suppression or local extraction for dust; use enclosures in interiors.<\/li>\n<li>Protect drains and soils from slurry and oils; provide spill kits and trays.<\/li>\n<li>Use appropriate PPE and ensure communication procedures in confined or noisy areas.<\/li>\n<\/ul>\n<h2>Step-by-step approach to deconstructing foundations<\/h2>\n<p>A structured approach increases safety and efficiency.<\/p>\n<ol>\n<li>Investigation: As-built records, <em>ground-penetrating radar<\/em>, subsoil investigation and utility inspection.<\/li>\n<li>Define boundary conditions: Limits for vibration, noise, and dust; load-bearing capacity of the <em>work platform<\/em>.<\/li>\n<li>Plan segmentation: Cuts, drilling patterns, splitting points, removal sequence.<\/li>\n<li>Preparations: Expose, relieve, install temporary <em>shoring<\/em>.<\/li>\n<li>Separating and splitting: Combination of <strong>Concrete pulverizers<\/strong>, <em>rock wedge splitter and concrete splitter<\/em>, <em>steel shear<\/em> depending on the material composite.<\/li>\n<li>Transport logistics: Piece sizes, lifting devices, removal, interim storage.<\/li>\n<li>Documentation: Records on emissions, waste balance, quality of <em>separation cut<\/em> surfaces.<\/li>\n<li>Backfilling and reinstatement: Controlled backfill, compaction verification, and surface restoration where required.<\/li>\n<li>Final handover: As-built updates, material balances, and verification of compliance with permits.<\/li>\n<\/ol>\n<h2>Typical practical applications<\/h2>\n<p>The foundation type shapes deconstruction in various scenarios.<\/p>\n<ul>\n<li>Upgrading existing structures: Partial removal of floor slabs, roughening and re-anchoring &#8211; a combination of splitting and pulverizer work minimizes vibration in <em>building gutting and concrete cutting<\/em>.<\/li>\n<li>Machine foundations: Highly reinforced blocks with embedded parts &#8211; <em>Multi cutters<\/em> and <em>Combination shears<\/em> for the embedded parts, <strong>concrete pulverizer<\/strong> for concrete, <em>steel shear<\/em> for reinforcement.<\/li>\n<li>Shortening piles: Expose, segmented reduction; steel piles cut with <em>steel shear<\/em>, reinforced concrete piles pre-drilled and split.<\/li>\n<li>Tank locations: Dismantling of vessels with <em>cutting torch<\/em>, followed by deconstruction of ring foundations using <em>rock wedge splitter and concrete splitter<\/em> &#8211; a frequent <em>special demolition<\/em>.<\/li>\n<li>Rock heads in the foundation area: Local release using <em>rock wedge splitter<\/em>; relevant in <em>rock excavation and tunnel construction<\/em> as well as in <em>natural stone extraction<\/em>.<\/li>\n<li>Heritage-sensitive areas: Low-vibration segmentation and controlled lifting to protect adjoining masonry or finishes.<\/li>\n<\/ul>\n<h2>Sources of error and practical tips<\/h2>\n<p>Common problems arise from underestimated reinforcement, unclear subsoil conditions, or insufficient segmentation. It is sensible to define cut and splitting points early, plan provisional supports, and match the use of <strong>concrete pulverizer<\/strong> and <em>rock wedge splitter and concrete splitter<\/em> to the component geometry. A reliable hydraulic supply via suitable <em>hydraulic power packs<\/em> ensures consistent work cycles, especially in tight interior spaces of <em>special demolition<\/em>.<\/p>\n<ul>\n<li>Validate assumptions with trial openings and adjust drilling patterns as required.<\/li>\n<li>Predefine lift points and rigging to avoid component overstress during removal.<\/li>\n<li>Sequence steel cutting after concrete reduction to keep elements stable.<\/li>\n<li>Continuously check emissions against limits and adapt methods if thresholds are approached.<\/li>\n<\/ul>\n<h2>Documentation and quality assurance<\/h2>\n<p>Ongoing control of segment sizes, fracture patterns, and emissions simplifies process control. Sampling for the <em>recycling<\/em> of concrete and steel as well as photo documentation support the verification of orderly deconstruction processes. Deviations &#8211; such as unplanned crack propagation &#8211; are addressed by adjusting splitting patterns or changing pulverizer jaw sets. Material traceability, calibration records for measurement devices, and daily tool condition checks complete a robust quality regime.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The foundation type describes how structures safely transfer their loads into the subsoil. It shapes planning, construction, and later deconstruction. Especially in existing structures, during concrete demolition and deconstruction, the chosen foundation influences which separating or splitting methods are suitable &#8211; for example, deploying a concrete pulverizer for reinforced concrete <a class=\"moretag\" href=\"https:\/\/www.darda.de\/en\/knowledge\/foundation-type\">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-19231","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>Foundation Type in Construction - Shallow &amp; Deep<\/title>\n<meta name=\"description\" content=\"Civil engineering guide \u2713 to foundation type - shallow &amp; deep options, load transfer, low vibration deconstruction.\" \/>\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\/foundation-type\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Foundation Type in Construction - 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