Planning document

Planning documents form the technical and organizational basis for work in concrete demolition, special demolition, as well as rock excavation and tunnel construction. They consolidate all essential information on structural analysis, methods, equipment, safety, and environmental protection. In connection with products from Darda GmbH – such as concrete demolition shear, hydraulic wedge splitter, hydraulic power packs, hydraulic demolition shear, Multi Cutters, steel shear, rock wedge splitter, and cutting torch – planning documents define the methodological sequence, design parameters, and the interfaces to execution. This makes it possible to establish efficient, low-vibration, and safe workflows for gutting work and cutting, natural stone extraction, or special operations.

Beyond pure coordination, planning documents function as an integrated method statement with risk controls and verifiable performance criteria. They align engineering intent with execution, reduce change-induced risks, and provide traceability for approvals and audits.

Definition: What is meant by a planning document?

A planning document is understood to be a structured, written package of analyses, concepts, calculations, drawings, and work instructions that governs the preparation and implementation of a project in deconstruction or rock excavation. It includes, among other things, as-built survey, risk assessment, method selection, equipment configuration, work sequences, emission and immissions control, as well as quality assurance. For the selection and sizing of concrete demolition shear or hydraulic wedge splitter, the planning document contains concrete key figures (e.g., required splitting forces, opening dimensions, hydraulic flow rates) as well as specifications for drilling patterns, cutting lines, and demolition sequences. Typical deliverables also comprise a work method statement, an inspection and test plan, and clear acceptance criteria.

Structure and contents of a planning document

A robust planning document leads from the structural and material analysis through the method decision to detailed work planning with equipment concept, safety and environmental protection measures, logistics, and testing and documentation concept. It is structured so that execution proceeds step by step, transparently and adaptably – including clear criteria indicating, for example, when concrete demolition shear or hydraulic wedge splitter are advantageous to deploy.

Interfaces, responsibilities, and versioning

• Interfaces: Defined handovers to structural engineering, geotechnics, MEP, and site management, including data formats and drawing layers.
• Responsibilities: Named roles for approvals, supervision, measurements, and waste classification to ensure accountability.
• Versioning: Document control with change history, revision dates, and distribution lists for traceability.

As-built survey and structural analysis

The process begins with the systematic recording of all relevant conditions. The aim is to describe material behavior, load-bearing action, and accessibility so that methods and equipment can be selected appropriately.

Concrete structure, reinforcement, prestressing

Compressive strength, member thicknesses, reinforcement ratio, concrete cover, and any prestressing are essential. These factors determine whether a member is preferably reduced mechanically with concrete demolition shear or separated with low-vibration levels using hydraulic wedge splitter. For prestressed concrete, demolition and unloading sequences are planned with particular care.

Material classification and hazardous substances

Identifying coatings, bitumen, asbestos-containing materials, or contaminated sites is the basis for the sequence of gutting works and for immissions control. Planning documents assign protective measures and waste classifications. Sampling plans, disposal codes, and decontamination interfaces are defined to ensure lawful handling.

Separation cuts and drilling patterns

Drawings and plans define cuts, borehole diameters, spacings, and sequences. For splitting methods, drilling patterns are chosen so that splitting forces are effectively transferred, e.g., along intended break lines, joints, or slots with controlled crack propagation. Tolerances for cuts, allowable edge damage, and protection of adjacent structures are specified.

Typical investigation methods

• Non-destructive testing such as rebound hammer, ultrasound, and rebar detection.
• Scanning of reinforcement and post-tensioning using radar or cover meters.
• Test bores and cores for strength, composition, and harmful substances.
• Verification of boundary conditions including bearing lines, restraints, and access clearances.

Method and equipment concept

The choice of method depends on load-bearing behavior, sensitivity to vibrations, spatial constraints, and schedule requirements. Planning documents describe how devices are combined to achieve safe and economical processes.

Decision criteria and method matrix

• Vibration and noise limits: Thresholds and monitoring concept influence splitter versus shear selection.
• Access and reach: Geometry, working height, and carrier machine positioning determine feasible tool sizes.
• Reinforcement density: Cross-section steel content guides pre-splitting, cutting, or direct crushing.
• Environmental constraints: Dust control, water management, and contamination risks shape method choice.
• Schedule and phasing: Parallelizable sequences and changeover times between tools are balanced.

Concrete demolition shear: application limits and sizing

For concrete demolition shear, opening width, cutting and crushing force, weight, and suitability for reinforced cross-sections are decisive. Planning documents define in which demolition stages components are removed with shears, how the residual load-bearing capacity is maintained, and when to switch to finer fragmentation. They consider access, boom reaches, and permissible set-up locations of the carrier machine.

Hydraulic wedge splitter and rock wedge splitter

Hydraulic wedge splitter as well as rock wedge splitter generate high splitting forces in boreholes with very low vibration levels. The planning document defines borehole diameter, drilling depth, center-to-center spacing, and the actuation sequence of the splitting cycles. In massive members or in rock with pronounced jointing, this enables controlled crack guidance, which is advantageous in special demolition and in tunnel construction.

Hydraulic power packs and power supply

For hydraulic power packs, flow rate, operating pressure, hose lengths, and couplings are specified. The planning document ensures that connected tools – from concrete demolition shear through hydraulic demolition shear to cutting torch – are reliably supplied with the required hydraulic performance. Aspects such as oil temperature, filtration, and service intervals are integrated into the workflows. The energy supply concept considers electrical versus combustion drives, ventilation requirements, and noise restrictions in enclosed or sensitive areas.

Complementary tools and combinations

Hydraulic demolition shear, Multi Cutters, steel shear, and cutting torch are integrated depending on the project phase. The planning document describes tool change, cutting sequences for mixed materials (concrete, steel, tanks), and handover between splitting and cutting methods. Fire protection, spark control, and watchkeeping are addressed where thermal cutting is used.

Application areas and method-specific planning

Depending on the application area, demolition strategy, equipment combination, and the focus in immissions control vary. Planning documents link these requirements with realistic cycle times and resources.

Concrete demolition and special demolition

Here, reducing vibrations and noise is often paramount. Concrete demolition shear enable a sequential, force-controlled reduction of cross-sections. Hydraulic wedge splitter separate massive members before shears and cutters perform finishing work. Load redistribution is planned via safe demolition sequences and temporary shoring. This aligns with established practices in concrete demolition and deconstruction.

Gutting and cutting

Indoors, dust suppression, removal routes, and emission limitations are decisive. Multi Cutters and hydraulic demolition shear take over cutting mixed materials before concrete demolition shear crush the remaining mineral cross-sections. The planning document defines cutting plans and sectional exposure. Negative pressure zones, water supply for suppression, and waste segregation are considered in the setup.

Rock excavation and tunnel construction

Low-vibration splitting methods are suitable in sensitive areas, with small overburden, or near existing structures. Drilling patterns are aligned with joint systems and rock strength. Ventilation, drainage, and haulage logistics in confined cross-sections are planned in detail. This approach reflects established methods in rock demolition and tunnel construction.

Natural stone extraction

In extraction, bedding and stratification planes are used. Splitters and rock wedge splitter work along natural weak zones. The planning document describes sequence, wedge guidance, and handling of the extracted blocks, including edge stability and transport securing.

Special operations

In areas with explosion risk, in near-core zones, or underwater, specialized procedures with minimized emissions, redundant power supply, and clear approval processes are envisaged. Permit-to-work systems and dynamic risk assessment are embedded for non-standard operations.

Safety, environment, and permits

Planning documents include hazard analysis, measures for occupational safety and health protection, as well as specifications for immissions control. Legal requirements are generally taken into account; specific permits must be checked on a project basis.

Minimizing emissions and immissions

Dust suppression (e.g., water spray system), noise reduction measures through methods with low impact, and vibration monitoring are to be defined. Splitting methods and concrete demolition shear contribute to a gentle approach due to low vibrations.

Occupational safety and personal protective equipment

Exclusion zones, signals, emergency stop concepts, safe hose routing, lifting gear use, and PPE are specified. In addition, load take-up and anchorage points are documented.

Monitoring and documentation during execution

• Vibration and noise measurements with trigger levels and response plans.
• Dust monitoring at defined receptors with escalation rules.
• Daily briefings, toolbox talks, and recording of changes to the method statement.
• Permit register, equipment inspection logs, and incident reporting workflow.

Logistics, accessibility, and site setup

The site setup forms the practical foundation for safe and efficient workflows. Planning documents define set-up areas, traffic routes, and media supply.

Load-bearing capacities and set-up areas

Substrates, slab loads, and temporary substructures are checked. Set-up and rescue routes for carrier machines and hydraulic power packs must be planned.

Load paths, hose routing, and couplings

Hose runs are routed smoothly, protected, and with clear identification. Coupling points and pressure reliefs are described unambiguously.

Lifting, transport, and waste streams

• Lifting plans, crane reaches, and anchor points coordinated with the demolition sequence.
• Internal transport routes sized for components and containers, including turning radii.
• Waste segregation by material class with labeled interim storage and disposal documentation.

Quality evidence and documentation

Planning documents specify measurement and verification methods: target/actual comparison of cycle times, measurements of vibrations, noise, and dust, checks of member dimensions after separation cuts, as well as photo documentation. Deviations are addressed with predefined measures.

• Inspection and test plan with hold points before irreversible steps.
• Acceptance criteria for cut accuracy, crack control, and residual stability.
• Calibration or trial runs to validate drilling patterns and splitting parameters.

Sustainability and resource conservation in deconstruction

Selective separation methods, single-material fragmentation, and low vibration levels support recycling and reduce environmental impacts. Hydraulic wedge splitter and concrete demolition shear enable controlled member separation with reduced energy input and minimized secondary damage.

Additional measures include reuse of secondary aggregates, separation of reinforcing steel with high purity, water recirculation for dust control, and tracking of energy consumption to identify optimization potential.

Avoiding typical planning errors

Experience shows that many problems can be avoided through clean pre-planning. Planning documents specify clear checkpoints and contingencies.

• Underestimation of reinforcement densities and the resulting cutting problems with concrete demolition shear.
• Unsuitable drilling patterns for splitters that lead to uncontrolled cracking.
• Insufficient hydraulic performance or unsuitable hose lengths that reduce tool performance.
• Lack of demolition sequences with shoring measures for load-bearing members.
• Unclear emission control measures in sensitive areas.
• Uncoordinated transport and disposal routes.
• Access restrictions and insufficient crane reach not reflected in the method concept.
• Missing contingency for tool downtime and wear parts supply.
• Inadequate drainage and water management in underground or confined areas.

Key figures and calculation approaches for design

Planning documents contain practical guide values that are verified for the specific project. They serve to select tools and to define drilling patterns and cycle times.

• Required splitting force depending on concrete compressive strength, cross-section, and drilling pattern.
• Borehole diameter and center spacing for hydraulic wedge splitter in relation to member thickness.
• Opening width, crushing force, and mass of the concrete demolition shear to suit member geometry and the carrier machine.
• Hydraulic data (flow rate, operating pressure, oil temperature) per tool and line length.
• Expected vibration and noise emissions per method with suitable mitigation measures.
• Time allowances per cut, bore, splitting cycle, and shear stroke for cycle planning.
• Allowable borehole deviation, edge distances, and minimum web thickness to prevent spalling.
• Safety and partial factors used to derive working values from characteristic material properties.

Where feasible, key figures are validated through small-scale trials to calibrate the calculation model and to de-risk full-scale execution.

Example structure of a planning document

The following outline has proven clear and practical and can be applied to projects of different sizes.

1. Project and as-built data (structure, materials, boundary conditions)
2. Risk assessment and protective measures
3. Method selection with justification (concrete demolition shear, hydraulic wedge splitter, complementary tools)
4. Equipment configuration and hydraulic supply
5. Demolition and separation concept (cutting and drilling plans, sequences)
6. Structural analysis, load redistribution, and temporary shoring
7. Logistics, site setup, disposal routes
8. Emission protection (noise, dust, vibrations, water)
9. Quality assurance, measurements, and verification
10. Communication, approvals, and updates
11. Change log and version control

Handover to execution and ongoing updating

Planning documents are living documents. Adjustments in material findings, construction sequence, or equipment configuration are incorporated transparently. Handovers to execution include clear approval processes, points of contact, drawings, and phase plans so that teams can deploy concrete demolition shear, splitters, and complementary tools in a targeted manner. Briefings, method statement walkthroughs, and digital checklists support consistent implementation on site.

Checklist for a quick start

• Structural analysis completed and documented?
• Methods defined: shearing, splitting, cutting – with justification?
• Equipment configuration and hydraulic data verified?
• Drilling and cutting plans approved?
• Demolition sequence, shoring, and exclusion zones defined?
• Immissions control measures planned and communicated?
• Logistics and disposal routes coordinated?
• Measurement and verification concept prepared?
• Change management defined?
• Permits and notifications obtained and recorded?
• Interfaces, roles, and responsibilities assigned?
• Monitoring thresholds and response actions specified?