How to Remove Prefabricated House Slabs

The removal of prefabricated house slabs should follow scientific steps and strictly adhere to safety precautions, as detailed below:

Removal Steps

1. Develop a Removal Plan
   Create a detailed plan based on the house structure, the location of the prefabricated slabs, and the surrounding environment (such as adjacent buildings and pipeline distribution). Specify the removal sequence (e.g., advancing from the edges to the center), the required tools (e.g., rebar cutters, hydraulic breakers), and personnel assignments. For example, if the prefabricated slabs are connected to load-bearing walls, prioritize cutting key rebar nodes.

2. Cut Connecting Structures
   Use rebar cutters, electric grinders, or gas cutting tools to precisely cut the rebar or bolts connecting the prefabricated slabs to beams, columns, and other structures. Avoid damaging the main structure during operation, such as retaining sufficient rebar length for subsequent repairs.

3. Break the Prefabricated Slabs
   Gradually break the slabs from the edges to the center using electric hammers, cutting machines, or hydraulic breakers. Control the force and angle to prevent debris from flying and injuring people or impacting surrounding walls. For large slabs, pre-drill holes to reduce the difficulty of breaking.

4. Gradual Removal and Cleanup
   Remove the slabs in sections according to the plan to avoid structural instability caused by large-scale removal at once. Immediately clean up the debris after breaking and transfer it to designated areas using trolleys or lifting equipment to ensure a clear work area.

5. Structural Inspection and Repair
   After removal, inspect the structural stability of the house, focusing on observing whether beams and columns have cracks or deformations. If voids or weak areas are found, fill and reinforce them with high-strength concrete. If necessary, have a professional institution conduct a structural safety assessment.

Precautions

1. Safety Protection Measures
   Workers must wear safety helmets, dust masks, protective goggles, and anti-smash shoes. Set up warning lines and hang warning signs, prohibiting non-workers from entering the work area. For high-altitude operations, install protective nets or scaffolding.

2. Dust and Noise Control
   Continuously spray water during the removal process to reduce dust dispersion. Use low-noise equipment or install mufflers to avoid disturbing surrounding residents. Suspend operations if dust concentration exceeds standards.

3. Environmental Monitoring and Compliance
   Continuously monitor dust, noise, and vibration data in the work area to ensure compliance with environmental standards. Removal operations must comply with regulations such as the Technical Code for Safety in Building Demolition Engineering (JGJ 147-2016).

4. Subsequent Disposal Requirements
   Dispose of waste prefabricated slabs by category. Rebar can be recycled, and concrete debris should be transported to designated disposal sites. If the project involves renovation of dilapidated buildings, report to the local housing and construction department in advance and complete relevant procedures.