Hangzhou Xiangjiang International Building steel structure project project is another high-rise steel structure building project that our company is carefully building, the project is located at No. 167, North Huancheng Road, Hangzhou, the main structure is a shear wall structure, of which the steel structure has A building, B building, C building, D building, all have cross columns, the roof is equipped with a steel structure structure layer, and the top floor of the structure is 98.3 meters; Between Building A and Building B, between Building C and Building D, each floor adopts a steel structure corridor. The span is 12.7 meters, the maximum cross-section of the steel beam is 1280×400×18×32×25, the minimum section is H 294×200×8×12, and the steel beam is heaviest 7.2 tons; there is a steel structure restaurant in the shape of "water drops" above the roof of the middle podium of Building B and C. The bottom elevation is 25.65m, the top elevation is 40.848m, the north-south span of the structure is 41m, the short axis direction is 30m, the structure has two floors, the lower part adopts 4 round tube columns as the overall support of the structure, the main component of the first layer between the columns is a plane truss, the second layer is a frame beam column, and the upper part is provided with a round tube keel shaped roof. In order to ensure the quality of the project, the company strictly follows the design drawings and construction requirements when purchasing raw materials and components, and only puts it into use after the sampling is delivered to the supervision and the owner witnesses the sampling inspection is qualified, which ensures the quality of all components of the project from the source.
Due to the peculiar shape of the water drop structure of this project, the various forms of trusses, the large span of the trusses, some trusses must be bulk at high altitude, and there are only 4 structural support columns, how to ensure the installation accuracy of the structural columns (verticality, coordinates of each connection point) is the focus of this project. To this end, before the construction, the project department formulates the most reasonable, most convenient, safest and most economical steel structure construction hoisting plan according to the actual situation of the project, considers the problems that may be encountered in the construction process, and the construction organization is scientific in place, and controls the construction quality, progress and safety of the entire project in advance, so that the entire construction is always in a pre-controlled state. In the construction operation, the project department earnestly follows the design drawings and construction specifications, takes the construction organization design as the general outline, uses the level and theodolite to track the operation, strictly controls the elevation, verticality and axis position of the steel beam installation, so that the unqualified does not change the order, and every day after completing the construction task of the day, the project completed that day is carried out in detail and conscientiously, and the problems are analyzed, summarized and rectified.
In the construction operation of the steel structure corridor, the project manager and technical personnel carried out scientific and reasonable cross-operation with the civil construction through the careful design of the construction plan and the comprehensive investigation of various factors on the site, and the components entered the site one after another according to the construction progress, successfully solving the difficulties such as the small working site and the limited stacking of components, and ensuring the construction progress. Due to the small size of the site, the on-site steel beam installation adopts the high-altitude bulk method, so that the on-site high-altitude installation workload is greater, for this reason, the project department in the construction Reasonably organize construction technology disclosure, conduct three-level safety education and comprehensive safety technology disclosure before going to work every day, strictly stipulate that construction personnel must fully implement operating procedures, pull lifelines and fasten seat belts and other safety protection measures when working at height, full-time safety personnel conduct on-site patrol inspections throughout the process during construction, and timely prevent and correct irregular behaviors. Ensure safe construction, ensure