Construction organization design of the second phase of Zhongnan Century City?

The following is the related contents of the construction organization design of Zhongnan Century City brought by Zhong Da Consulting Company for your reference.

(A) the time limit for a project target

In order to make the current project completed and put into use as soon as possible and provide the best service for the owner, the company has made careful arrangements in personnel organization, construction technology, equipment investment and material supply, and plans to complete all the engineering quantities of this project within 450 calendar days according to the requirements of the bidding documents, and decompose these 450 days into structural engineering and decoration time limit. See the residential building construction schedule of Changshu Zhongnan Century City (A4, A5 and A6) for details.

(2) Quality objectives

Ensure that the quality of the project reaches the qualified level, and at the same time ensure that there is a single high-quality project that reaches Changshu municipal level or above, and strive to create a high-quality structure and civilized construction site in Suzhou.

(3) Site management objectives

In order to keep the environment around the construction site clean and tidy, we have taken measures such as cleaning by designated personnel, so as to achieve orderly logistics, smooth construction and civilized construction, and strive to achieve municipal civilized construction model construction site in site management.

(4) Project management objectives:

The company fully implements the ISO9000 quality management and quality assurance standards. We will establish a perfect quality/environment/occupational health and safety assurance system according to the JS/QEOHS-2007 quality/environment/occupational health and safety management manual and program documents formulated by the company, and manage and control all quality-related functional activities in the whole construction process according to the characteristics of this project, so that all managers and employees have rules to follow. Set quality control points for special and key parts and processes. Eliminate unqualified products and provide products that meet customer needs. Implement construction project management according to international practice, and establish "Changshu Zhongnan Century City (A4, A5, A6) Residential Building Project Management Department". There is a project management department under the project management department, which is subordinate to the management departments of technology, quality, safety, cost, materials, labor and equipment deployment. Form a strong "headquarters management project" command system, and give full play to the overall advantages of the company in unified command, coordination and scheduling of people, finance and materials within the group.

(5) Construction environment objectives

According to the actual situation of the current site construction, environmental protection is also an important aspect to be considered in the construction site. While maintaining the fine tradition of civilized construction in the past, our company has formulated stricter environmental protection measures for this project.

On the premise of ensuring the project quality and time limit for a project, establish the environmental awareness of all employees on site, consciously protect public facilities and minimize environmental pollution.

(6) Safety objectives

Improve safety measures, improve safety awareness, eliminate hidden dangers through tracking control and inspection in place during construction, nip in the bud, put an end to death and serious injury accidents, and control the monthly work-related injury frequency below 1.5‰.

(VII) Service objectives

Thoughtful service, owner satisfaction, attention to complaints, abide by the contract, carefully coordinate the relationship with relevant parties, accept and actively cooperate with the owner and supervisor to control and supervise the project quality, project progress, plan coordination and site management.

Labor organization (labor planning, project subcontracting)

Reasonable and scientific labor organization is one of the important factors to ensure the smooth progress of this project. According to the actual progress of the project, timely deployment of labor. We will send the best labor team to the site through investigation and sign labor contracts at different levels. Conduct safety education before entering the site and carefully organize technical disclosure. Special types of work should hold relevant certificates, and quickly enter the working state after entering the site on time. In the construction of the main structure, steel workers and carpenters participate relatively more. According to the construction progress plan, put in decoration and water and electricity installation workers in time.

This project is constructed by our company without subcontracting.

Without the consent of the supervisor and the owner, our company will not subcontract without authorization.

According to the requirements of the overall construction control plan, quantities, division of running water section, decoration and water and electricity installation:

Work arrangement in busy farming season and Spring Festival holiday

Because the construction period of this project spans the busy farming season and the spring break, in order to ensure that the labor force can meet the production needs, detailed work arrangements and labor force coordination should be made in these two periods.

The project department has its own civil construction team and cooperates with our company all the year round. On the one hand, it can be used as a foundation construction team for highly skilled projects, and on the other hand, it can solve the problem of retaining people in busy farming. This part of the population is guaranteed to be more than 60% of the labor required at the normal construction site. For some construction projects with large labor allocation, the construction plan should be staggered with the busy farming season and the Spring Festival holiday as far as possible, so as to reduce the labor demand in the busy farming season and the Spring Festival holiday, avoid affecting the normal progress of the project due to the excessive number of returnees, and ensure the progress of the construction period.

If the construction period is particularly tight or the project must be continuous, some construction personnel can be arranged to stay at the construction site during the spring break to ensure the continuous construction of the project.

Input of major construction machinery (list of major construction machinery and equipment)

1. In order to meet the needs of the whole project construction, in the structural construction stage, 1 QTZ40 and 1 QTZ60 tower cranes are installed on the north side of the main building of Building 4 and Building 5, respectively, for vertical transportation of structural construction, in which Building 5 and Building 6 share a tower crane. The concrete of the whole project adopts commercial concrete. The basement and the structural concrete below the 8th floor are basically poured by truck pump, while the concrete above the 8th floor is poured by fixed pump, and the tower crane cooperates with the construction.

2, the structure construction to more than 8 floors, and then put into 3 attached to the wall construction elevator, mainly used for vertical transportation of wall materials, mortar and various materials during the decoration stage construction, and set up 3 mortar mixers at the scene. See the main construction machinery and equipment schedule for details.

3, tower crane installation is completed before the main structure construction, first pouring tower crane foundation, embedded anchor bolts in the tower crane foundation, after being foundation concrete strength meets the requirements, install tower crane. After obtaining the detailed geological report, the design of tower crane foundation cap is completed.

4. In order to ensure that the construction period will not be affected by equipment failure during use, we will also separately configure the necessary vulnerable parts of main equipment such as tower cranes, so as to give priority to prevention and ensure that the construction period goal is foolproof.

(A) the construction of electricity

Construction electricity shall be connected to the red line by the owner 15 days before the start of construction. For details, please refer to the layout of temporary electricity consumption. This layout is only experimental. After the location of the access point is clear, our unit will adjust the distribution room, distribution box and construction line according to the actual situation of the access point and the construction site. The laying of wires, distribution boxes and leakage protection devices shall conform to the safety regulations for electricity consumption on the construction site stipulated by the state.

In order to ensure the continuous pouring of waterproof concrete in the basement and prevent sudden power failure, a 120KVA generator is equipped at the site to ensure the electricity consumption for concrete pouring.

(2) Construction water

The construction water will be connected to the red line by the owner 15 days before the start of construction. See the layout of temporary water for construction. This layout is only experimental. After the location of the access point is clear, our unit will adjust the arrangement of temporary water use on site according to the actual situation of the access point and the construction site, and connect the water head to each water use point as needed.

In order to ensure the construction water for high-rise concrete curing, three high-pressure pumps with a lift of 100 m are equipped on site.

Material supply

According to the requirements of the tender, the building materials of this project will be purchased by us except those specified by the owner, and the project management department will work closely with the owner, designate some material manufacturers according to the owner, and operate in strict accordance with the material procurement procedures of the company's program documents to ensure the quality of materials entering the site. We will provide the preparation of main materials: we will provide the owner with a general material mobilization plan within 20 days after winning the bid, and propose a batch mobilization plan to the owner 20 days before each working procedure, so that the owner and supervisor have enough time to conduct material mobilization inspection.

In particular, steel bars and other materials must be made by state-owned manufacturers. Suppliers of commercial concrete used must be strong, standardized in management and reliable in quality. The mix proportion of commercial concrete must be provided to the owner, and the determination of the manufacturer needs to be confirmed by the supervisor and the owner.

In the decoration stage, all decoration materials are modeled, and qualified samples are selected through comprehensive evaluation among many suppliers. All kinds of samples must be approved and signed by the owner, supervisor and design institute. Finally, the contract department signs a supply contract with the supplier according to the confirmed model, and the project headquarters accepts the materials according to the model and quality standards stipulated in the contract. Both materials supplied by Party A and materials purchased by itself must be carried out in strict accordance with the material acceptance procedures, and unqualified materials are strictly prohibited from entering the site for use.

Construction coordination

(A) the cooperation between civil engineering and the owner's direct subcontractor

Part of the workload of this project is directly subcontracted by the owner, such as pile foundation engineering and earthwork. As the general contractor, our company will provide convenient construction conditions, and our facilities such as water, electricity, scaffolding and site construction machinery can be provided to subcontractors. And assist the owner to select subcontractors and strengthen the management of subcontractors. For professional construction, we will provide technical support. At the same time, supervise the subcontractors during the construction process, and communicate with the owner and supervisor in time when quality or safety problems are found.

(B) the installation of cooperation between various types of work

In order to ensure the smooth progress of the construction, ensure that the project quality conforms to the specifications and meet the requirements of the owner, sufficient technical preparations should be made in the early stage of the construction. Before the commencement of the project, the technical director of the project shall organize the construction personnel of various disciplines to comprehensively arrange the pipelines according to the construction drawing and the specific site conditions, and draw a profile to clarify the specific positions and elevations of the equipment and pipelines of various disciplines, especially focusing on the comprehensive layout design of the basement and the design of the standard floor model room, and the comprehensive construction can only be carried out after being approved by Party A. The construction sequence of various disciplines shall be subject to the arrangement of the project department.

After the completion of each working procedure, the handover of working procedures and the protection of finished products should be done well.

Cooperate with equipment debugging and trial operation. In the debugging stage, a debugging team is set up, all professionals are transferred to participate, and debugging and debugging work are arranged in a unified way.

(3) Coordination between installation and civil engineering

After the project construction personnel enter the site, they should be familiar with the drawings carefully, count the specifications, dimensions, installation parts, technical requirements and quantity of the reserved embedded parts, mark the drawings well, and check with the relevant technical personnel of civil engineering, without any mistakes. The professional team is responsible for the production and installation, actively cooperate in the process of civil construction, strictly control the installation quality, and at the same time, do not damage the building structure and steel bars at will, and prevent the casing from shifting and the wire tube from being damaged when the civil concrete is rammed. After the location of the box is agreed with the civil engineering, the civil engineering will leave a hole. The key point of this project should be to control the burying of waterproof casing when the pipeline passes through the external wall of the basement pool and the external wall of the basement concrete wall, and leakage and deviation are not allowed.

(d) Coordination of finished product protection

1) through the coordination between the owner and the construction units, do a good job of finished product protection. The project management department shall formulate finished product protection measures according to the actual situation on site, requiring all construction units not to pull the installed pipes, switches, valves, etc. Unfinished toilets shall not be used, and pipe plugs shall not be taken away at will. Easily damaged lamps, sanitary ware, etc. Should be installed after the installation of civil doors and windows. At the same time, it is required to pay attention to the protection of walls and ceilings during installation and construction to avoid pollution and damage.

2) The key point of finished product protection of this project is the protection of embedded pipelines, and corresponding work instructions should be prepared.

3) In order to ensure the quality and beauty of the pipeline construction in the tube well, it is required that the pipeline in the tube well with internal painting should be constructed after the completion of internal painting, and the wall surface should not be polluted during construction. After the installation of pipes and wells without internal painting, they should be temporarily closed, and it is strictly forbidden to be used as construction waste and drainage channels.

(5) Cooperation with the owner (or supervisor)

1) obey the management of the owner (or supervisor) during the construction period.

2) The comprehensive layout of pipelines of various disciplines shall be submitted to the owner (or supervisor) for examination and approval, and can be fully implemented only after approval.

3) The owner (or supervisor) shall supervise the quality during installation. Invite representatives of the owner (or supervisor) to participate in unpacking, concealed acceptance, testing and debugging of the equipment, and apply for visas in time.

Pile foundation and earthwork construction scheme of basement project

1. The pile foundation engineering and earthwork of this project are directly subcontracted by the owner. As the general contractor, our company will provide convenient construction conditions, and the water, electricity, scaffolding, construction machinery and other facilities on site can be provided to subcontractors for use. At the same time, supervise the subcontractors during the construction process, and communicate with the owner and supervisor in time when quality or safety problems are found.

2. During pile foundation construction, the subcontractor shall prepare a detailed special construction plan, which shall be implemented after being approved by the general contractor and the supervisor.

3. The earthwork excavation of this project is a key link to be controlled because of its deep excavation. Before the excavation, the earthwork construction unit must prepare a detailed special construction plan, including the enclosure, precipitation, measurement and observation of the deep foundation pit, and stipulate it. The plan can only be implemented after it is submitted to the general contractor and the supervisor for approval.

Construction method of basement floor

1. The basement floor of this project is a raft foundation with a thickness of 1.3m, which is relatively large. Therefore, it is necessary to prepare for mass concrete pouring. For details of mass concrete pouring scheme, see Chapter 7.

2, the basement floor template using brick mold and wood bamboo plywood combination construction. The basement floor adopts 100 thick C 15 plain concrete cushion.

3. This project adopts mass concrete pouring scheme. After concrete pouring, thermal insulation measures such as straw bag, plastic film covering and wet water curing should be taken within 12 hours to prevent temperature cracks caused by excessive temperature difference inside concrete. The temperature difference between the inside and outside of concrete is monitored by temperature measurement, and the number of straw bags is adjusted according to the temperature difference.

4. During basement floor construction, special attention should be paid to the binding quality of floor reinforcement, the positioning of column and wall reinforcement should be accurate and firm, and the spacing of floor reinforcement should be ensured by playing chalk lines on the cushion layer first. When binding the upper and lower steel bars on the bottom plate, tie bars shall be set according to the requirements of construction drawing, and attention shall be paid to the reservation at the basement door. Concrete pouring of bottom slab shall be carried out in parallel, and no construction joints shall be left for continuous pouring. Pay special attention to the compactness of concrete at the mortise and tenon of water stop to prevent leakage.

5. In the basement floor construction, in order to ensure the spacing between the upper and lower layers of steel bars, the upper and lower layers of steel bars adopt constructional column horse stool with the spacing of 1.2m to ensure the binding quality of steel bars.

6, the basement concrete pouring

(1) The basement floor of this project is 1300mm thick, and the concrete is C35 S6 waterproof concrete.

(2) The construction shall be carried out step by step.

Combined with the characteristics of pumping construction, concrete is layered according to a certain thickness and poured from top to bottom and from far to near along the direction of concrete flow. Concrete is poured by car pump.

Basement construction method

The basement structure of this project is a raft foundation, in which A4 # and A5 # buildings have two floors of basement and A6 # building has one floor.

1, formwork project

The basement floor of this project adopts 18mm thick wood and bamboo plywood.

The first horizontal construction joint of basement exterior wall is located at 300mm floor, and the construction joint adopts steel plate waterstop to stop water.

After the basement floor construction is completed, the external wall formwork is glued with wooden strips, and the construction quality of concrete wallboard is guaranteed by using opposite bolts. The installation spacing of support bolts is 500mm horizontally and 500mm vertically. Please refer to the following figure for suggestions on the installation of support bolts:

Schematic diagram of opposite bolt installation

All wallboard and roof in the basement are glued with wooden and bamboo formwork. Before the formwork construction, carpenters will draw the production and installation drawings of the big boards according to the construction drawings, and the big boards will be numbered one by one according to the size, which is convenient for rapid and accurate installation during construction.

The formwork at the joint of beam and column is made of wooden formwork to ensure the quality of concrete pouring in this part.

2, the basement wallboard, roof construction

(1) basement reinforcement connection mode: the longitudinal reinforcement of raft adopts mechanical cold extrusion joint.

(2) The formwork for basement wall and roof is large. Wood plywood formwork is used for design and assembly, and water-stop Rachel is used for connection between internal and external formwork, and steel pipe is used for reinforcement.

(3) Due to the large amount of roof concrete, there are requirements for the self-waterproofing of the structure. Its concrete quality must be strictly in accordance with the design requirements of concrete strength grade standards. At the same time, continuous casting is required in the casting process, and no construction joints are allowed.

waterproof construction of basement

The basement waterproofing of this project adopts reinforced concrete self-waterproofing.

(1) Waterproof construction must be carried out according to the requirements of design drawings, and irrigation records shall be made, and the leaking parts during irrigation shall be drawn into charts, and then the measures and methods for dealing with leakage shall be taken out for the corresponding parts, so as to finally meet the waterproof requirements (the water testing method shall be determined separately).

(2) Concrete mixing: mixing and feeding sequence: stones → sand → cement → expansion agent → water. Dry mixing sequence before adding water is 0.5-65438 0 minutes. Add water in three times, then stir 1-2mim (0.5mim longer than ordinary concrete). Before concrete mixing, it must be operated in strict accordance with the notice of laboratory mixture ratio, and shall not be modified without authorization. In the rainy season, the water content of sand must be measured every day to adjust the water consumption. Slump control of pumped commercial concrete 14- 16cm.

(3) The concrete in the basement is continuously cast, leaving no construction joints as far as possible.

(4) Before pouring concrete on construction joints, the concrete surface should be chiseled, sundries removed, cleaned and wetted, and then a layer of cement mortar with a thickness of 2-3cm (i.e. stones removed from the original mixture ratio) or stone concrete with half the same mixture ratio should be laid. The height of the first step is 40cm, and then each step is 50-60cm. Concrete shall be poured in strict accordance with the sequence specified in the construction plan. When the height exceeds 3 m, concrete shall not fall freely from the height above 2 m.

(5) In order to ensure the compactness of concrete, mechanical vibration should be adopted, and the vibration time is generally 10S, and no vibration leakage or excessive vibration is allowed. The vibration duration should make the concrete surface appear laitance, bubble-free and non-sinking. Mortar laying and vibrating should start from symmetrical positions to prevent formwork from moving. The parts with small structural section and dense steel bars should be operated in strict accordance with the requirements of layered pouring and layered vibrating. When pouring to the top surface, it must be scraped flat with a scraper and rubbed flat with a washboard to make the surface dense and flat.

(6) curing: after pouring at normal temperature (20-25℃), cover it with straw bag for 6- 10h, and water it for curing. The concrete surface should be kept moist, and the curing time should not be less than 14d.

(7) When the pipeline installed in this project crosses the basement exterior wall, it must be operated in strict accordance with the following requirements:

Waterproof treatment method of embedded casing;

(8) Waterproof through-wall bolts are used for formwork support of basement exterior wall.

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