supervisorThe control objective is to ensure that the production and installation quality of prefabricated components meet the quality standards required by the design and specifications.
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Key points for quality control of prefabricated building component supervision - Figure 1
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With the development of housing industrialization in China, more and more enterprises begin to carry out the research, development and production of "industrialized housing", pursue "building a house like a car", decompose the house into multiple modules and process them into semi-finished products in the factory. As long as the on-site assembly construction is carried out, it can become a finished housing. The development of prefabricated buildings cannot be separated from the PCComponent (short for "precast prefabricated building concrete component", is a finished concrete component manufactured by the component processing unit in a factory. It is assembled, connected and partially cast in situ at the construction site to form a concrete structure, which has the advantages of high quality, high efficiency, energy conservation, environmental protection, etc., and is an important way to realize the industrialization of housing.) The production of PC components cannot be separated from PCMold.
The production and processing drawings, connection node details, prefabricated component template drawings, and detailed drawings of prefabricated components can be downloaded for reference.
Hoisting construction scheme for prefabricated residential buildings (attached with multiple drawings) Hoisting construction scheme for prefabricated residential buildings (attached with multiple drawings) Hoisting construction scheme for prefabricated residential buildings (attached with multiple drawings)
Hoisting construction scheme for prefabricated residential buildings (attached with multiple drawings) Hoisting construction scheme for prefabricated residential buildings (attached with multiple drawings)
For general structural members, the bending angle of stirrup hook shall not be less than 90 °, and the length of straight section after bending shall not be less than 5 times of stirrup diameter;For structural members with seismic fortification requirements or special design requirements, the bending angle of stirrup hook shall not be less than 135 °, and the length of straight section after bending shall not be less than 10 times of stirrup diameter;
Detailed rules for supervision of quality control of prefabricated buildings, including:1、 Understand prefabricated buildings;2、 Pre stage quality control of prefabricated buildings;3、 Quality control of prefabricated building process;4、 Common quality problems..... pdf format, 73 pages in total.
Guidelines for factory construction of prefabricated concrete components in prefabricated buildings Guidelines for factory construction of prefabricated concrete components in prefabricated buildings
Identification atlas of hidden dangers in construction safety production (prefabricated building concrete prefabrication works) Identification atlas of hidden dangers in construction safety production (prefabricated building concrete prefabrication works)
This document is the implementation rules for supervision of prefabricated components of marine engineering. This article is very valuable for reference and is hereby shared for everyone to learn. The contents are detailed and can be downloaded for reference.
This document is the production and quality acceptance standard of as cast finish concrete precast members, which is detailed and can be used for reference.
This project is to build a new three room one group cooling tower on the north side of one three room one group cooling tower in the original first circulating water plant. The three floor prefabricated beam and slab walkways of this project are connected with the original one circulation cooling tower.The relative elevation of the device is ± 0.00, which corresponds to the absolute elevation of 50.650m. The main part is a 6-span 3-floor assembly structure. The first floor is 6.5m high, the second floor is 4.3m high, the third floor is 5.0m high, the span is 8.0m, and the total height is about 15.0m. The prefabricated corbel column is 15.850m-16.650m long, the geometric dimensions are 500 × 500mm, 400 × 400mm, and the weight is about 8T-16T;The geometric dimensions of precast beams are 300 × 800mm, 300 × 750mm, 300 × 700mm, 300 × 650mm, 300 × 600mm, 300 × 500mm, 250 × 600mm, 250 × 500mm, 180 × 500mm, 150 × 300mm, and the weight is about 0.5T~6T;The weight of prefabricated trough shaped wall plate and prefabricated trough shaped roof is about 0.5T~2T.Between the south side of the building and the original cooling tower, a 15.0m light steel frame, precast coupling beam and precast slab form a connection overpass. On the north side, there is a cast-in-place external staircase, with concrete grade of C25. The staircase columns, beams, steps, rest platform plates are plastered with cement mortar. The top of the cooling tower and the staircase handrails are steel pipe handrails.This plan is specially prepared for prefabricated component assembly construction.
This document is the supplementary bill of quantities for reinforced concrete precast members of Fujian prefabricated building project, including precast concrete columns, precast concrete beams, precast concrete wallboards, etc., for reference.
Supervision opinions: during the construction of high-rise buildings, whether the measurement scheme of the construction company is reasonable, whether the measurement data is accurate and reliable, and how professional the survey personnel are, all directly determine the project quality.Therefore, it is an important link of construction quality process control to do a good job of survey supervision.The supervising engineer must review the measurement scheme in the process of project construction and recheck and sign the measurement data.As the inspection and acceptance of the supervisor is the last procedure of the surveying work, it puts forward high requirements for the supervision engineer to master the knowledge of surveying specialty.The supervision opinions are as follows:
The total building area of the project is 47185.73m ², the total land area is 26983.20m ², the aboveground building area is 38302.32m ², the underground building area is 8883m ², the floor area ratio is 1.4, and the building density is 23.54%.1. 6. Building 10 is a shear wall structure with 8 floors above the ground;Building 5 is a frame supported shear wall structure with 6 floors above the ground;2. 3. Buildings 7, 8 and 9 are shear wall structures with one floor underground and eight floors above the ground;Building 4 is a shear wall structure with one floor underground and seven floors above the ground.The total height (maximum) is 25.65m. The 1-3 floors are cast-in-place concrete structures, and the external walls, balconies, and air conditioning boards above the 4th floor are prefabricated component (PCF) systems. The seismic grade depends on the main structure.
This document is the quality acceptance record form of the inspection lot of prefabricated components of construction engineering. This document is very valuable for reference and is hereby shared for everyone to learn. The content is detailed and can be downloaded for reference.
This material is a training handout PPT on prefabricated buildings, 104 pages in total.Data overview: The project includes six buildings, 1 #, 2 #, 3 #, 6 #, 7 #, and 8 #, which adopt an integral prefabricated shear wall structure. The main prefabricated components include: prefabricated shear walls, PK prestressed concrete composite floors, prefabricated sandwich external partitions, prefabricated internal partitions, prefabricated stairs, prefabricated balconies, and other prefabricated components.The west plot includes 4 #, 5 # and 9 # buildings, supporting public buildings and kindergartens, and adopts cast-in-place concrete shear wall structure.
This data is the quality acceptance record form for the inspection lot of prefabricated components of a project. The contents are complete and can be downloaded
This document is the design drawing of prefabricated components for Wangting Middle School's expansion of the high school teaching building dormitory building project. The content of this document includes: detailed layout plan, detail drawing, elevation drawing, etc., which can be downloaded by designers for reference.
In order to ensure that the appearance and internal quality of small piece prefabrication meet the requirements of the owner company and improve the construction quality standard, our project department takes the following measures for small piece prefabrication.1、 Construction preparation 1Site preparation 2Centralized prefabrication is adopted for small parts prefabrication. First, select a site with an area that meets the construction requirements, then level the site, harden the concrete, and delimit the material area, concrete mixing area, small parts production area, curing area, and storage area.threePreparation of formwork 4High quality and high-strength thickened plastic mould shall be used. The thickness of the bottom plate of the plastic mould shall not be less than 3mm, and the thickness of the side plate shall not be less than 4mm. The spacing between reinforcing ribs shall not be more than 5cm. 5. Determination of concrete mix proportion 6At least three to five mix proportions shall be adopted for test, and the concrete mix proportion with the best appearance quality shall be selected under the condition that the strength requirements are also met.sevenPreparation of vibration table 1) In order to prevent deformation of the vibration table plate during construction, the thickness of the vibration table steel plate should not be less than 8mm. The lower back strap of the steel plate should be firmly supported and fully welded with the vibration table steel plate.The position of the back strap reinforcement should be symmetrical from left to right, and the vibration table motor should be placed in the middle.2) The lower spring type of the vibration table plate is determined according to the weight of the vibration table plate and the predicted weight of the vibration precalciner.The springs are arranged along the four corners of the platen.3) The motor power of the vibration table should be between 1.1KW and 1.5KW.4) The area of the vibration table should not be too large to prevent the vibration power from decaying at the corners. The height of the vibration table should be convenient for manual operation. Each construction team should prepare at least two vibration tables.
In order to improve the construction quality of prefabricated structures, this document includes: project overview Shaoxing Jinghu JH-07-02 plot (phase III) project was invested and built by Zhejiang Changye Real Estate Development Co., Ltd.The project is located in Shaoxing, bordering Shangxijiang River in the west, Zhanqian Guihua Avenue in the east, Houjiang River in the south and Qunxian Road in the north.The total construction area of the project is 116732.22m 2.The project buildings are composed of 7 high-rise buildings and 2 shops, of which the height of high-rise buildings is 80.65~96.15m, and the height of shops is 4.55m and 9.40m respectively. Building 9 # is constructed by partial prefabricated structures (prefabricated stairs, prefabricated beams, prefabricated floors), of which the floor thickness is 13cm, the lower 6cm is prefabricated floor, and the upper 7cm is cast-in-place concrete.
1、 Key points for quality control of prefabricated building construction 1. Inspection of prefabricated components entering the site 1.1 The appearance quality of prefabricated components entering the site shall be fully inspected, without serious defects or general defects.