Prefabricated Slab House Reinforcement Contractor

The reinforcement construction plan for prefabricated slab houses typically includes project overview, compilation basis, selection of reinforcement plans, construction preparation, main construction methods, construction duration and conditions, and pricing information.

Project Overview: It is necessary to clarify basic building information, such as the construction year, structural type, building area, and existing problems. For example, a three-story brick-concrete residential building constructed in 1998 has issues with its prefabricated slabs, including cracks at the bottom of the slabs and concrete spalling at the slab-end supports, directly affecting structural safety and usability.

Compilation Basis: It is essential to list the standards and regulations followed during construction, such as the 'Code for Acceptance of Construction Quality of Building Structure Reinforcement Engineering' (GB50550-2010) and the 'Technical Code for Concrete Structure Reinforcement Design' (GB50367-2013), ensuring that the reinforcement design, material selection, and construction techniques comply with national mandatory requirements.

Selection of Reinforcement Plans: The selection should be based on the current structural condition, reinforcement effectiveness, construction difficulty, and cost. Common methods include:

• Bottom Slab Reinforcement with Carbon Fiber Sheets: By utilizing the composite action of high-strength carbon fiber sheets and structural adhesive, the flexural capacity of the prefabricated slab is enhanced, and crack propagation is suppressed, suitable for bottom slab reinforcement with crack widths ≤ 0.2mm.
• Additional Steel Supports at Slab Ends: For areas with concrete spalling and insufficient load-bearing capacity at the supports, steel supports are used to distribute loads and enhance support stability, ensuring reliable connection between the steel supports and the original structure.
• Top Slab Surface Reinforcement: Reinforcing steel mesh is laid on the top slab, and fine aggregate concrete is poured to form a composite floor system, improving overall stiffness and waterproofing and wear resistance, suitable for scenarios with significant floor deformation or the need to enhance usability.

Construction Preparation:

• Technical Preparation: Organize technical personnel to familiarize themselves with drawings and regulations, conduct technical briefings and pre-job training, and verify key parameters such as crack width and deflection values of the prefabricated slabs.
• Material Preparation: Select materials that meet standards, such as Class I 300g/m² unidirectional carbon fiber sheets (tensile strength ≥ 3400MPa) and Q235 steel, and strictly inspect material quality.
• Equipment Preparation: Equip with vehicles such as truck cranes, concrete cutters, and rebound hammers to ensure good performance of construction machinery.
• Site Preparation: Clear obstacles, level the lifting area, and set up material warehouses and processing sheds.

Main Construction Methods: Key processes include base treatment (cleaning surface dust and oil, polishing flat), carbon fiber sheet application (applying structural adhesive and layering the sheets according to regulations), steel support installation (fixing by welding or bolting), and steel bar binding and concrete pouring (controlling concrete mix proportions and vibration quality).

Construction Duration and Conditions: Using professional reinforcement techniques can shorten the construction period. Construction conditions must ensure the availability of water and electricity and avoid the impact of rainy seasons or low-temperature environments on material performance.

Pricing Information: Reinforcement costs vary significantly depending on the region, construction difficulty, and material selection. Market quotes typically start at 260.00 yuan per square meter, with specific costs determined based on the actual site conditions.