This plan introduces the construction method of steel reinforced concrete structure in detail according to the specific situation of the site, and the problems needing attention in the construction process
Construction scheme of steel reinforced concrete column - Figure 1
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The normal section strength of steel reinforced concrete column is calculated, and the axial force borne by the reinforced concrete part and the steel reinforced concrete part is analyzed. According to the calculation formula of the normal section bearing capacity in the structural design standard of Metallurgical Industry Corporation, a new axial force distribution method is proposed,The axial load is distributed according to the state of the steel reinforced concrete part and the reinforced concrete, and then the bearing capacity of the two parts is calculated according to the existing specifications. The sum of the two parts is the normal section strength of the steel reinforced concrete column.This method makes the calculation method of the normal section bearing capacity of SRC columns clear in concept, simple in calculation, and in good agreement with the test results.
This data is about the connection structure between reinforced concrete shear wall and steel reinforced concrete column, including: connection structure between reinforced concrete shear wall and steel reinforced concrete column (I), connection structure between reinforced concrete shear wall and steel reinforced concrete column (II), connection structure between reinforced concrete shear wall and steel reinforced concrete column (III),The connection structure between the reinforced concrete beam and the steel reinforced concrete column has detailed design specifications, which can be used as a reference for designers
This project is the operation center project of Shenzhen Stock Exchange. The structural form adopts the composite structure of steel reinforced concrete frame and reinforced concrete cylinder, the outer frame column steel reinforced concrete column (SRC column), the core tube cast-in-situ reinforced concrete structure, the tower above the ground, and the steel concrete profiled steel sheet composite floor outside the core tube.There are mainly four types of steel reinforced columns: AC, ACC, CC and IC.
**The natatorium of the second phase project is located in * *. There are 12 steel reinforced columns in the national construction center of the project, which are divided into two rows of arc equidistant parts. The two rows of columns are connected by steel reinforced beams.The maximum weight of a single steel skeleton is 14.649 tons, the minimum weight is 12.563 tons, the column length is 22.167m, and the total weight is 290.447t. Due to the excavation and sloping of civil engineering, the crane can not be close to the hoisting, so the hoisting is difficult.
The base area of the project is about 4000 square meters, which is composed of one main building and four podiums.The total building area of the main building is about 52000 square meters, including 20 floors of the main building, 16 floors above the ground and 18 floors locally. The maximum eaves height is 71.8 meters.The main structure is a steel structure frame shear wall structure. Most of the frame columns are cross steel frame box columns. Above the ninth floor are box columns, and below are cross steel frame columns.
The outer frame tube of the project is composed of 30 giant steel tube concrete columns, which are divided into 17 areas.The strength grade of concrete in zone 1~7 is C70, and that in zone 8~17 is C60;The concrete strength grade of joint JA-JG area is C90, JH-JP area is C80, and JQ area is C60.The inclination angle of the steel pipe column in each area is 8.06 °~17.07 ° (the included angle between the center line of the steel pipe column and the vertical line of the earth).The pouring amount of single concrete in the component area is 7~43m3, and the pouring amount of single node concrete is 2~47m3.
In order to find a simple method to calculate the normal section strength of steel reinforced concrete columns, the size of the axial force borne by the reinforced concrete part and the steel reinforced concrete part is analyzed. According to the calculation formula of the normal section bearing capacity in the structural design standard of Metallurgical Industry Corporation, a new method of axial force distribution is proposed,This method distributes the axial load according to the state of the steel reinforced concrete column and the reinforced concrete under the axial stress state, and then calculates the bearing capacity of the two parts according to the existing specifications. The sum of the two parts is the normal section strength of the steel reinforced concrete column.This method makes the calculation method of the normal section bearing capacity of SRC columns clear in concept, simple in calculation, and in good agreement with the test results.
This project includes the north-south direction of C-shaped column, east-west direction of C-shaped column, the connection detail of round steel column and concrete beam, etc. The drawing content is complete, clear and precise, and designers are welcome to download and use it.
Since the main body of the project is divided into two large sections according to the location of the designed post cast strip, and each large section is divided into three small sections for separate flow construction, the steel structure construction is faster than the concrete structure construction, so a steel structure construction team is selected.The horizontal partition of steel structure is the same as the construction partition of concrete structure, and the vertical partition is divided by sections, that is, the first section is B1-F1, and the upward section is one section every three floors.
Acceptance of pipes and pipe fittings 1. Acceptance of pipes and pipe fittings must be carried out.The acceptance contents include: product certificate, quality guarantee, performance inspection report, specification and quantity, packaging, and the quality of pipes and fittings.2. When accepting pipes and pipe fittings, samples shall be taken from the same batch, and inspection shall be carried out according to the provisions of the current enterprise standard Inspection Standard for Steel Framed Plastic Composite Pipes and Pipe Fittings, and comprehensive testing shall be carried out if necessary.
The formwork of steel reinforced column shall be 18mm thick sand board.100 × 100 batten horizontal @<300 shall be used for vertical back ridge, 100 × 100 × 5 square steel pipe up and down @ 400~600 shall be used for horizontal back ridge, and Φ 16 round steel, steel backing plate and M16 nut shall be used for fastening split screw.The back support of the column formwork is composed of two layers. The first layer is the vertical ridge directly supporting the formwork to support the lateral pressure of concrete on the formwork;The second layer is the column hoop supporting the vertical edge to support the pressure on the vertical edge;The column hoops are connected with each other by split bolts to form a complete column formwork support system.
CAD construction drawing design of connection structure between reinforced concrete shear wall and steel reinforced concrete column.The drawings are complete.It has strong practicability and reference function.Fine design, just for your reference, please download for reference.
Four settlement observation points are set at 0.30m relative elevation of each column, and four inclination observation points are set at 24.95m relative elevation of each column
Slipform construction scheme of a frame (column) project Slipform construction scheme of a frame (column) project Slipform construction scheme of a frame (column) project
The construction project of * * * * * in Henan Province is located at * * * No., Zhengzhou City, close to * * authorities. There are 16 main structural columns of the main building in the form of steel reinforced concrete composite structural columns. The construction management of steel bar binding and steel structure construction intersperses with high requirements for the quality of steel bar engineering and steel structure welding.
River sand with good grading, hard texture, clean particles and particle size less than 5mm is used in this project. When river sand is not easily available, mountain sand or machine-made sand processed with hard rock can also be used. Before use, samples should be taken and tested according to the current national standard Test Specification for Aggregates in Highway Engineering (JTJ 058).
The Dezhou * * * Complex Building Project is located in the east of the Convention and Exhibition Center of Dezhou Economic Development Zone, with a base area of about 4000 square meters, consisting of one main building and four podiums.The total building area of the main building is about 52000 square meters, including 20 floors of the main building, 16 floors above the ground and 18 floors locally. The maximum eaves height is 71.8 meters.The main structure of Dezhou * * * Complex Building Project is a steel structure frame shear wall structure. Most of the frame columns are cross steel reinforced box columns. Above the ninth floor are box columns, and below are cross steel reinforced columns.The cross section has four specifications: 800 × 400 × 20 × 40 × 700 × 400, 500 × 250 × 20 × 40 × 500 × 250, 500 × 250 × 20 × 30 × 500 × 250, 400 × 200 × 20 × 30 × 400 × 200;Box section: 800 × 700, 500 × 250, etc;In addition, there are two specifications of I-shaped section: 400 × 400 × 20 × 40 and 300 × 300 × 18 × 30.There are many types of components, high requirements for processing technology, and difficult installation;There are rigid connection and flexible connection between columns and beams, and between walls and beams;Some column beam connections are provided with corner braces;H-shaped steel section frame column extends to the underground floor.The main steel structure of the project weighs about 5778 tons, and the lifting volume is large. Due to the cross construction of installation and civil engineering, the site construction management is extremely difficult.High quality and safety requirements, with greater construction difficulty
This data is the detailed structural drawing of the connection node between a reinforced concrete shear wall and a steel reinforced concrete column. The drawing is the detailed structural drawing of the connection node between a reinforced concrete shear wall and a steel reinforced concrete column. There are 1 node in total. The design is accurate and the content is detailed, which can be downloaded for reference by netizens.
This project is a schematic node structure for the longitudinal reinforcement of the steel reinforced concrete beam passing through the web of the steel reinforced concrete column, including the stirrup of the steel reinforced concrete column, the opening when passing through the web of the steel reinforced concrete column, and the opening reinforcement of the flange of the steel reinforced concrete column. The content of the drawing is complete, the expression is clear, and the drawing is rigorous. The designer is welcome to download it.
Steel reinforced concrete structure is a composite structure with steel skeleton and encased reinforced concrete, referred to as SRC structure, also known as steel reinforced concrete structure.In this structure, the steel skeleton and the concrete form a whole and bear the external load together.There are many forms of steel ribs, mainly including lattice steel ribs, H-shaped steel ribs, cross shaped steel ribs, round steel tubes, etc.
The Project is located in the CBD of Beijing, within the East Third Ring Road, Chaoyang District, Beijing, bordering Guandongdian South Street in the east and Guanghua Road in the south.It consists of two office buildings and a podium.The total building area is 142268m2, and the aboveground part is 103065.6m2. There are four floors underground, and the building area is 39202.4m2. The engineering structure is designed as steel reinforced concrete frame tube structure, and the foundation is designed as flat raft foundation. The total amount of foundation concrete is 26445m3. The foundation under the two main buildings is 3m thick, and the foundation under the podium and lobby is 1.5m thick. From the perspective of settlement, in the design, the foundation is 3m thick and 1.5m thickTwo 1500mm wide post cast strips are arranged at the junction.The outer contour of the base plate is 116.25m long in the east-west direction and 88.4m long in the north-south direction; the thickness of the foundation plate is divided into 1500mm and 3000mm according to the thickness, and the top elevation is -19.10m and -17.60m respectively.
Reinforced concrete frame structure is the main structural form of multi-storey and high-rise buildings.According to the design, the frame structure construction includes cast-in-place structure construction, prefabricated assembly hoisting construction, and combination of prefabricated and cast-in-place construction.For cast-in-place reinforced concrete frame construction, columns, walls (shear walls, elevator shafts), beams, slabs (also prefabricated) and other components shall be poured on site according to the construction drawings.
A project is located in a city. It is a frame shear wall structure. There are one underground floor and seventeen floors above the ground. The basement is equipped with a post cast expansion band. The concrete strength marks above the bottom plate mainly include: C50P6 for the exterior wall of the basement, C50 for the column below+16.75m, C50 for the shear wall, C40 for the 16.75~34.75m column, C30 for the shear wall, C30 for the column and shear wall above 34.75m, and C30 for the beam, slab, and ladder of each floor,C30P6 is used for the floor beam, slab and roof of the outdoor part of the first floor.
At present, the engineering construction has entered the winter construction. With the decline of temperature, the construction quality of concrete and masonry has been affected to a certain extent. In order to effectively control the construction quality of concrete and masonry in winter
. Concrete mix design requirements (1) Ordinary Portland cement with strength grade of 42.5 or above shall be used for cement.(2) When the water cement ratio is ≤ 0.6, add TH concrete superplasticizer to minimize the amount of water in the concrete and improve the early strength.(3) The antifreeze for buildings 1, 6 and 7 is TH concrete antifreeze produced by Tianhua mixing plant, which has the function of frost resistance and early strength;Building 5 adopts BDL-1 concrete antifreeze produced by Beijing Liujian Admixture Factory.(4) For the concrete whose roof needs to be mixed with waterproof agent, UEA series of winter applied waterproof agent shall be added.(5) The mixing amount of the above admixtures shall be prepared in advance by the laboratory before construction, and the mixing shall be prepared by specially assigned person to strictly control the mixing amount.The antifreeze materials shall be reported to the supervisor before the winter construction concrete enters the site, and can be used only after the supervisor agrees
(1) Mixing station 1. Raw materials: various materials have been mobilized and inspected as qualified.2. Mix proportion: according to the design requirements, our department has designed the production mix proportion of (SBS) modified asphalt concrete.As for the supply of cold materials, the materials shall be loaded in strict accordance with the proportion set by the target mix proportion, that is, 5~10mm crushed stone, 0~5mm stone chips, river sand: mineral powder=44:33:17:6. Through Marshall test, the optimal asphalt consumption is determined to be 5.62%, that is, the optimal asphalt stone ratio is 5.95% 3. Mechanical equipment: (1) Loading equipment: ZL50DOne loader (2) Transportation equipment: 9 dump trucks 4. Personnel organization (1) Technicians: (2) 9 mechanical operators (3) Test personnel (4) 20 auxiliary workers 5. Main experimental instruments: extractor, thermostatic water bath, Marshall tester, ductility meter, softening point meter, asphalt concrete screen, electronic balance, penetration meter, drying ovenOne set of mixing material inspection instrument such as pendulum tester.
MU10 autoclaved sand lime bricks and M7.5 cement mortar are used for brick masonry in the civil air defense area of the basement of the project.Other basement brickwork shall be made of MU10 autoclaved lime sand bricks and M5 cement mixed mortar.
The project is located in Donghu Road, Chanba River Delta, Xi'an City, and is constructed by China Construction Third Engineering Bureau Co., Ltd. The structural form is a frame shear wall structure, with a total construction area of 57482m2. The number of floors: the management committee office area: seven floors above the ground, one floor underground, the enterprise office area: five floors above the ground, one floor underground;
2 # and 3 # transfer stations adopt concrete box foundation with concrete grade of C30 and underground concrete impermeability grade of S8; 4 # transfer station and coal crusher room foundation are cushion cap foundation;The main works are reinforced concrete frame structures.2 # transfer station has one underground floor and two overground floors, with a building area of 1124 m2 and a total height of 19.7 m; 3 # transfer station has one underground floor and three overground floors, with a building area of 1389 m2 and a eaves height of 19.7 m. The coal crusher room has four overground floors, with eaves height of 31 m.
Concrete construction scheme at low temperature in winter Concrete construction scheme at low temperature in winter Concrete construction scheme at low temperature in winter
The special plan for concrete repair can be used in large public construction projects and residential projects. It summarizes the solutions to most common problems of concrete quality
The project is * * *, the design seismic fortification intensity is 7, the seismic fortification category is C, and the design service life is 50 yearsThere are 6 single buildings in this project, with a total construction area of 46446.93 ㎡, cushion concrete is 100 mm thick C15 concrete.The strength grade of structural column, ring beam, lintel and canopy concrete is C25.
The amount of concrete used in this project is large. The underground foundation concrete is about 19000m3, and the aboveground structure is about 67000m3, with a total amount of more than 86000m3. All structural concrete is commercial ready mixed concrete. The concrete supplier must select a unit that has a certain supply capacity and can meet the on-site supply needs,The ready mixed concrete is supplied by the commercial concrete unit close to the project.
This data is the CAD detail drawing of the connection structure between reinforced concrete shear wall and steel reinforced concrete beam and column, which is detailed and can be used for reference.