[Engineering Version] Daily Question 20180313
Thread Content
This project is a renovation project involving the tower and residential buildings in Area West 1, located in the South China region. The total construction area is 66,056.86 square meters, and it consists of a tower along with three residential buildings. The tower section is a fully cast-in-place frame structure ； The residential building section adopts a fully cast-in-place reinforced concrete shear wall structure, with a large-formwork construction method. The project owner is a certain government agency; the design firm is Huaxia Architectural Design Institute in that city, the supervision company is Sester Supervision Company from the same city, and the general contractor for construction is Construction and Development Company. The foundation work was subcontracted to a local foundation company with the owner’s approval, and a subcontract was signed accordingly. The project commenced on June 6, 2016, and was completed on May 6, 2017, with the quality goal of achieving the status of a municipal high-quality project. Questions: (1) What are the aspects that need to be checked regarding the quality of the formwork used for the cast-in-place shear walls in this project? (2) What are the quality inspection tasks carried out by the construction unit during the reinforcement work? (3) In the process of quality control for this project, who is responsible for self-control and who is responsible for monitoring? (4) If quality issues arise in the foundation construction due to the responsibilities of the foundation company during the construction process, does the general contracting construction company bear any responsibility? Who is at fault? (1) Quality control for formwork work should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
Question: (1) What are the aspects that need to be checked regarding the quality of the formwork used for the cast-in-place shear walls in this project? Answer: The quality control of formwork work should cover its design, fabrication, installation, and removal. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) What are the aspects that the construction unit checks regarding quality during the reinforcement work? Answer: The quality control of reinforcement works includes a series of inspections such as the inspection of reinforcements upon arrival at the site, their processing, connection, and installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) In the process of quality control for the construction of this project, who is the entity responsible for self-control? And who is the entity responsible for monitoring? Answer: In the process of quality control for the construction of this project, the construction units (Construction and Development Company, Foundation Company) are the entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in the foundation construction due to the responsibility of the foundation company during the construction process, does the general contracting construction and development company bear responsibility? Who is at fault? Answer: If quality issues in foundation construction occur because of the foundation company’s faults during construction, the general contracting construction and development company shall take responsibility. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
Answer: (1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability of the formwork, its support area, as well as its waterproofing and freeze-resistant properties, levelness, geometric dimensions, joints, use of release agents and their application, horizontal positioning and verticality, and the embedded components and pre-drilled holes meet the requirements of the design and regulations. It is also necessary to control the strength of the concrete at the time of formwork removal and determine the proper sequence for removing the formwork. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retest reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators. The quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, thickness of the protective layer, etc.). The specifications, quantity, position, and anchorage length of embedded components, as well as the spacing, quantity of stirrups, along with their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction entity (**a certain government agency**), the supervision agency (Cester Supervision Company), the design agency (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear the responsibility. The reason is that the parent company, as a subcontractor, entered into a project subcontracting contract with the general contractor; the general contractor charges fees from the subcontractor and assumes joint liability for the quality of the subcontracted work
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, entered into a subcontracting agreement with the general contractor; the general contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Sester Supervision Company), the design unit (Huaxia Architectural Design Institute), and **the engineering quality supervision department** serve as the main entities responsible for oversight. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.
Quality control of formwork sub-projects should include the design, fabrication, installation, and removal of formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. !
(1) The quality control of formwork sub-projects should include the design, fabrication, installation, and removal of the formwork. A detailed construction plan should be prepared before its construction. During the construction process, key checks include whether the construction plan is feasible, and whether the strength, stiffness, stability, support area of formwork, as well as its waterproofing, freeze resistance, levelness, geometric dimensions, joints, use of release agents and their application, horizontal position and verticality, and embedded components and pre-drilled holes meet the requirements of the design and specifications. It is also necessary to control the strength of the concrete at the time of formwork removal and to follow the proper sequence for such removal. When setting up and removing formwork for important structural components, it is also necessary to check the calculation methods used in the formwork setup and removal plan. (2) The quality control of the reinforcement sub-project includes a series of inspections such as inspection upon the arrival of the reinforcement, reinforcement processing, reinforcement connection, and reinforcement installation. Key points to check during construction: certificates of conformity and retesting reports for raw materials upon arrival, the quality of shaping and processing, test reports on steel bar connections along with certificates of competence for the operators, as well as the quality of steel bar installation (including: type, specification, quantity, position of longitudinal and transverse steel bars, connection methods, anchorage and joint locations, number of joints, percentage of joint area, lap length, geometric dimensions, spacing, and thickness of the protective layer); the specifications, quantity, position, and anchorage length of embedded components; and the spacing, quantity of stirrups, as well as their hook angles and planar lengths. Only after passing the acceptance inspection and filling out the \"Reinforcement Concealed Work Inspection Record\" in accordance with relevant regulations can concrete be poured. (3) During the quality control process of this project’s construction, the construction units (Construction and Development Company, Foundation Company) serve as the main entities responsible for self-control ； The construction unit (**a certain government agency**), the supervision unit (Cester Supervision Company), the design unit (Huaxia Architectural Design Institute), and the **project quality supervision department** (South China Region Quality Supervision Station) are the main entities responsible for monitoring. (4) If quality issues arise in foundation construction during the construction process due to the responsibility of the foundation company, the general contracting construction and development company shall bear liability. The reason is that the parent company, as a subcontractor, enters into a subcontracting agreement with the main contractor; the main contractor charges fees from the subcontractor and bears joint liability for the quality of the subcontracted work.