Demolition Plan for Prefabricated Panel Houses

The demolition of prefabricated panel houses requires systematic planning that combines project overview, resident relocation, construction steps, and safety measures. The specific plan is as follows:

I. Project Overview and Demolition Criteria

1. Project Information: Clearly define the total building area, number of buildings, and construction year, confirming the structural type as assembled reinforced concrete prefabricated panels. For example, a project involves 12 prefabricated panel residential buildings constructed between 1980 and 2000, with a total area of 8,600 square meters, requiring demolition due to wall cracking and steel reinforcement corrosion.
2. Demolition Target Identification:
   • Structural Safety Category: Identified as Grade D dilapidated buildings (e.g., wall cracks > 1mm, foundation settlement > 5cm, concrete strength < C20), or seismic performance below 70% of current standards.
   • Planning Adjustment Category: Included within municipal engineering red lines (e.g., rail transit, business district expansion), or non-harmonious buildings located outside historical and cultural districts.
   • Comprehensive Assessment Category: Buildings aged 40 years or more with a structural aging index > 0.65, or with a fire safety facility deficiency rate > 80% and renovation costs exceeding 50% of replacement costs.

II. Preliminary Preparations and Resident Relocation

1. Building Safety Assessment: Commission a Class A testing agency to conduct inspections in accordance with the 'Reliability Assessment Standard for Civil Buildings', issuing a report that includes safety ratings, disposal recommendations, and emergency measures as a basis for approval.
2. Compensation and Relocation Plan:
   • Monetary Compensation: Calculated at 90% of the market price of new houses in the same area, with a 15% bonus for early signing and a 6-month transition fee paid.
   • Property Rights Exchange: Original demolition and reconstruction follow a '1:1 interior area + 5% common area subsidy' policy, with an additional 10% area for relocation within 3 kilometers.
   • Housing Voucher Relocation: The face value of the housing voucher = monetary compensation amount × 1.12, valid for 24 months, with full refund of property purchase deed taxes.
   • Original Demolition and Reconstruction: When 100% of the entire building agrees, the transition period is 24 months, with relocation based on the original area and options for paid expansion of 5-20 square meters.

III. Construction Steps and Safety Measures

1. Construction Steps:
   • Preliminary Preparations: Comprehensively inspect building risks, formulate a demolition plan, and handle permit procedures.
   • Demolition Operations: Follow the sequence of doors and windows → exterior walls → interior walls → floor slabs → stairs → roof, using cutting machines and gas cutters to cut components, with manual cleaning of small materials.
   • Site Cleaning: Classify and stack waste materials to ensure no residues remain.
   • Site Restoration: Level the land to prepare for subsequent construction.
2. Safety Measures:
   • Personnel Protection: Wear safety helmets and safety belts, and use safety ropes for high-altitude operations.
   • Equipment Management: Regularly inspect machinery, with operators required to hold certificates.
   • Environmental Protection Requirements: Classify and dispose of waste materials, set up dust screens, and sprinkle water to reduce dust, minimizing pollution.

IV. Case Reference
A five-story prefabricated house project covering an area of 1,000 square meters required demolition and reconstruction due to severe aging. The construction adopted a frame structure and prefabricated panel wall separation technique to ensure safety and efficiency.