Specification for Prefabricated Assembly of House Foundations

The specification for prefabricated assembly of house foundations mainly covers three major aspects: technical standards and specifications, quality control and acceptance, and safety management and supervision. The specific content is as follows:

Technical Standards and Specifications

Design Requirements: The design of prefabricated foundations must strictly adhere to national standards such as the 'Code for Design of Building Foundations' to ensure that their bearing capacity, stability, and durability meet engineering requirements. Design documents should specify foundation dimensions, shapes, material parameters (such as concrete strength grades and steel bar specifications), and installation methods, providing precise bases for construction.
Material Requirements: Materials used for prefabricated components, such as concrete and steel bars, must comply with standards like the 'Code for Design of Concrete Structures' and 'Steel for Reinforced Concrete'. For example, concrete must meet indicators such as compressive strength and impermeability, while steel bars must possess specified yield strength and ductility to ensure foundation performance from the source.
Installation Requirements: The installation process must be carried out in accordance with design documents and construction plans, with a focus on controlling installation position accuracy (e.g., axis deviation ≤ 5mm), connection firmness (e.g., bolt tightening torque meets standards), and geometric dimensions (e.g., flatness deviation ≤ 3mm). During installation, verticality and levelness must be continuously monitored, and temporary supports should be used to fix components to prevent deformation.

Quality Control and Acceptance

Quality Control: Construction units should establish a full-process quality management system, covering raw material inspection (e.g., steel bar retesting, concrete test block retention), processing and fabrication monitoring (e.g., mold dimension verification, embedded part positioning), and installation process supervision (e.g., connection joint inspection). For example, before concrete pouring, the stiffness of the formwork must be verified, and after pouring, it must be covered and cured to prevent cracking.
Acceptance Procedures: After installation is completed, acceptance must be carried out in accordance with the 'Unified Standard for Constructional Quality Acceptance of Building Engineering'. Inspection items include appearance quality (no honeycombing or pitting), dimensional deviations (e.g., cross-sectional dimension deviation ± 5mm), and connection strength (e.g., no cracks in welded joints). Acceptance records must be archived, and non-conforming items must be rectified within a specified time and re-inspected.
Accountability: If engineering accidents (such as foundation settlement or component fracture) occur due to installation quality issues, construction units, supervision units, and design units must be held legally accountable. For example, if the construction unit fails to follow the drawings or the supervision unit fails to perform on-site supervision duties, they must bear corresponding legal consequences.

Safety Management and Supervision

Safety Management: Construction units need to formulate safety operation procedures and conduct three-level safety education (company, project, and team) and technical disclosures to ensure that construction personnel master risk prevention and control measures for high-altitude operations and machinery operations. For example, before lifting operations, the wear condition of steel wires must be inspected, and overloading operations are strictly prohibited.
Supervision Mechanism: Construction administrative authorities should supervise the construction process through regular inspections and special inspections, focusing on verifying the implementation of safety protection facilities (such as edge protection and safety nets) and emergency plans. For violations, rectification notices must be issued, and in severe cases, work stoppage penalties may be imposed.
Emergency Response: Construction units need to prepare emergency plans, clarifying accident reporting procedures (e.g., reporting to the construction unit within 1 hour), on-site disposal measures (e.g., evacuating personnel and setting up warning zones), and allocation of rescue resources (e.g., contacting medical and fire departments). Regular drills should be organized to ensure the operability of the plans.