1. This project is a "high, large, new and special" project, and the overall construction organization, coordination and deployment of the project are very important.
The construction area of this project is about 82000m2, and the total building height is about 180m. It is a super-large and super-high-rise building with large project scale and many professional subcontracts. Therefore, it is necessary to determine the reasonable construction process, scientifically deploy, carefully organize the project construction, and coordinate the internal and external relations of the project to ensure the smooth progress of the project.
Second, the project has a long construction period, a large amount of work and many construction tasks.
This project has a long construction period, large quantities and many construction tasks. Therefore, we must give full play to the general contracting organization and management ability of our unit in terms of time limit for a project, decompose the total time limit for a project goal into periodic time limit for a project control points, reasonably arrange the construction sequence and process crossover, actively coordinate the relationship between the general contractor and various professional subcontractors, ensure the project construction as planned, and thus realize the final completion on schedule.
3. This project has a large volume, complex structure and strict engineering survey control requirements.
This project covers a large area with irregular buildings. Engineering survey is one of the key and difficult points of this project. Therefore, it is necessary to send professional surveyors, formulate a reasonable survey plan and strictly control the plane, elevation and sag system, so as to ensure the accurate positioning of the building plane on the one hand and effectively control the elevation and sag system of the 33-story structure of the tower on the other.
Fourth, the quality requirements are high.
This project is one of the landmark buildings along the Huangpu River and is a high-grade commercial building. The standard of quality requirements is to ensure the "Magnolia Award" and strive for the "Luban Award", with high quality requirements. Therefore, it is necessary to equip high-quality construction personnel, strictly control the input quality, fully control the construction process, pay attention to the quality control of construction procedures, strictly control the quality acceptance of partial projects, and implement the policy of "prevention first" to ensure the construction quality of the project.
Five, civilized construction, production safety requirements are higher.
This project is located in the bustling financial district, next to the five-star hotel in Shangri-La, surrounded by many people and cars. In order to create a safe, civilized, clean and beautiful construction environment, it is necessary to carefully organize and rationally lay out, give full play to the organization and management ability of the general contractor in civilized construction and safe production, regularly check the civilized construction and safe production on the construction site, and take necessary measures to reduce the adverse effects of noise, dust and water pollution on construction and life during construction.
Six, the preparation, transportation and pouring of mass concrete in the basement of this project are the construction difficulties.
The elevation of the foundation slab of this project is-12.350m, the thickness of the main building foundation slab is 2500m, the thickness of the podium foundation slab is 1200mm, and the concrete of the slab is about 12000? Belonging to mass concrete construction. In order to ensure the construction quality of mass concrete, the certificates and performance test reports of various raw materials, additives and admixtures must be checked before construction. Cement with low hydration heat should be selected, sand and gravel should be cooled with ice water before concrete mixing, and the pouring speed should be uniform when pouring mass concrete. The information dynamic temperature control system is used to detect the temperature change of concrete during construction. When the temperature difference between the inside and outside of concrete is ≥25oC, effective measures should be taken, such as increasing covering insulation. , concrete should be shipped after initial setting.
Seven, this project basement concrete support blasting operation is one of the construction difficulties.
The basement foundation pit support of this project is three-layer reinforced concrete support, and the basement construction area is about 7300? , the supporting quantity is large, the specifications are diverse, the steel content is high, and the supporting concrete is C30 grade. In order to ensure the smooth progress of the project and the construction period, it is planned to adopt mature delayed blasting technology. This project is located in the bustling financial center of Shanghai, with complex surrounding environment and great difficulty in blasting. Therefore, it is necessary to make a careful construction plan, make full preparations for the demolition work, and obtain the support and cooperation of local government functional departments.
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