by Click the blue word to pay attention to our purpose, guide the personnel participating in the inspection of assembly manufacturers to understand the procedures and key points of the inspection, and make an objective and comprehensive evaluation on the capabilities of all parties of the inspected unit.
The scope of application is applicable to the manufacturer’s inspection and disclosure of cast structures.
Breakdown of inspection work of assembly manufacturers I.
Introduction to the composition of inspection record form of assembly manufacturers II.
Recommendation principle of assembly manufacturers.
Employees of the company can recommend the construction unit, but in the inspection record, the source recommender information of the construction unit shall be filled in.
3、 Inspection principle of assembly manufacturers 1.
After the new unit is jointly inspected and approved by the company, it can be included in the company’s qualified unit library before participating in the project bidding.
2.
The joint inspection departments include: Engineering Bidding Management Department of the group, engineering management center, regional and project departments.
3.
The supplier’s recommender and the personnel associated with the supplier shall avoid the investigation.
4、 Preparation for inspection of assembly manufacturers 1.
Inquire whether the unit to be inspected has integrity problems or major contract dispute cases notified by the court.
2.
In order to improve the investigation efficiency, the basic information form of the construction unit to be investigated is sent to the construction unit in advance to fill in, so that our company can understand the basic information of the unit to be investigated in advance.
3.
The organization department shall first conduct a touch check on the construction unit to be inspected, and then organize relevant departments to conduct a joint inspection after preliminarily evaluating that the strength of the unit can meet the basic requirements of our company, so as to improve the efficiency of inspection on the construction unit.
4.
Inform the construction unit in advance of the principles of our investigation of the project manager: 1) in principle, the investigation project manager (or executive manager) and the project manager (or executive manager) who plans to send our company to bid in the future are the same person.
2) If another project manager is assigned in the future, it is required to provide the social security and performance certificate of the project manager, the company’s evaluation of the project manager, and the regional and project team interview and check.
5、 When inspecting a new construction unit, the headquarters of the assembly manufacturer must inspect its company headquarters.
It is best to meet its legal representative and record its contact information and address; It is not allowed to inspect only the branches or offices of new units.
Visit the headquarters of the construction unit, introduce the personnel of both parties and exchange business cards.
The construction unit is also invited to briefly introduce the company, including past performance, management mode, etc.
We must remind the construction unit of the problems to be faced after the implementation of “replacing business tax with value-added tax”: we require the cooperative units of precast projects to have the qualification of general taxpayers, which will be the prerequisite for our company to invite bids.
6、 Disclosure of key contents such as bidding documents 1.
Bidding method and quotation form our bidding method is invitation bidding and quotation with bill of quantities.
Emphasis: 1) in order to ensure the fairness, impartiality and openness of the whole bidding process, the bidder shall be invited to participate in the bid opening on site.
If the bidder cannot participate in the on-site bid opening, the bid opening result must be recognized, and the legal department of the company shall supervise the bid opening process.
2) The principle of bid award is to win the bid at a reasonable low price, and the bid lower than the cost without reasonable explanation will be treated as abandoned bid.
2.
Payment method 1) after signing the construction contract, Party A has an advance payment (generally 10%, paid in three installments); 2) The part of the contract project completed every month shall be approved and signed by the on-site supervisor and paid by the owner in the interim (5% shall be withheld as the quality deposit); 3) After the completion of the project, the rest shall be paid off except for the reserved 5% as the quality deposit; 4) After the completion of the project quality defect liability period (generally two years), the owner shall pay off all reserved quality deposits.
3.
Introduce the project scale, quality requirements and mobilization time requirements of cast materials.
Project overview b1# building has one floor underground and 10 floors above ground, with a total construction area of 8260.38 m2.
The main function of the building is ordinary residence.
The underground part is full cast-in-situ shear wall structure, the aboveground part adopts precast circular orifice plate cast shear wall structure system, and the staircase and elevator shaft adopt cast-in-situ shear wall structure.
B1# building has 1 basement, with a floor height of 3.6m.
It is an ordinary basement for non civil air defense.
It has 10 floors above the ground, with a floor height of 2.7m and a building cornice elevation of 27.0m.
The top of the building is provided with an elevator room and a water tank room.
The underground structure of the project adopts cast-in-situ reinforced concrete shear wall structure.
The foundation adopts reinforced concrete raft foundation.
The main structure on the ground adopts the structural system of the combination of precast circular orifice plate cast shear wall and cast-in-situ shear wall.
The building and roof system adopts the concrete composite floor slab + composite beam system with truss reinforcement.
Precast reinforced concrete stairs are used for standard floor stairs.
The precast components used in the project include: internal and external wall circular orifice plates (external wall with external insulation), coupling beam formwork, windowsill plate, composite floor prefabrication layer with truss reinforcement, composite beam, staircase, air conditioning board and daughter wall board.
According to the interpretation of the assembly drawing, the concave convex of the building plane of the project has little change, the layout of the main structure is simple and regular, the top and bottom are connected correspondingly, and the door and window openings are aligned up and down without wrong holes.
1、 Material requirements 1.
Concrete 2.
Reinforcement for the reinforcement used in the project, except that the non stressed distribution reinforcement in the concrete formwork adopts cold-rolled ribbed reinforcement, the other stressed and distributed reinforcement adopts hot-rolled reinforcement, and all longitudinal stressed reinforcement adopts HRB400 high-strength reinforcement.
2、 Main technical indexes of structural design and parameters related to seismic fortification III.
introduction to structural calculation 1.
Overall calculation: according to Article 5.3 of code for design of cast shear wall structures (DB11 / 1003-2013), the same mode decomposition reflection spectrum method as cast-in-situ reinforced concrete shear wall is used for elastic analysis and calculation under frequent earthquakes.
2.
Calculation of cast-in-situ shear wall: according to the requirements of article 8.1.1 of the technical code for precast concrete structures (jgj1-2014), the horizontal seismic bending moment and shear force of the cast-in-situ shear wall limb in the precast shear wall structure are multiplied by the amplification factor of 1.1 for reinforcement design..
