The Hangzhou Xiangjiang International Building Steel Structure Project is another high-rise steel structure building project that our company is carefully constructing. The project is located at 167 Huancheng North Road, Hangzhou. The main structure is a shear wall structure, with steel structures including Building A, Building B, Building C, and Building D, all of which have cross shaped columns. The roof is equipped with a steel structure frame layer, and the top floor elevation of the structure is 98.3 meters; Steel structure corridors are used to connect floors 4-23 between Building A and Building B, and between Building C and Building D, with a span of 12.7 meters. The maximum cross-section of the steel beam is a box shaped 1280 × 400 × 18 × 32 × 25, the minimum cross-section is H 294 × 200 × 8 × 12, and the maximum weight of the steel beam is 7.2 tons; There is a steel structure restaurant with a "water droplet" shape above the roof of the podium between Building B and Building C, with a bottom elevation of 25.65m and a top elevation of 40.848m. The structure has a north-south span of 41m and a short axis direction of 30m. The structure consists of two floors, with four circular pipe columns as the overall support for the structure. The main component between the columns on the first floor is a flat truss, the second floor is a frame beam column, and the upper part is a circular pipe keel shaped roof. To ensure the quality of this project, the company strictly follows the design drawings and construction requirements when purchasing raw materials and components. Only after the samples are delivered to the supervisor and the owner for witness and inspection, can they be put into use in this project, ensuring the quality of all components produced from the source.
Due to the unique shape of the water droplet structure, diverse truss forms, and large span of the truss in this project, some trusses need to be loose at high altitudes, and there are only 4 structural support columns. Ensuring the installation accuracy of the structural columns (verticality, coordinates of each connection point) is the focus of this project. To this end, the project department has developed the most reasonable, convenient, safe, and economical steel structure construction lifting plan based on the actual situation of the project before construction. The possible problems encountered during the construction process have been fully considered, and the construction organization has been scientifically in place. The construction quality, progress, and safety of the entire project have been pre controlled, ensuring that the entire construction is always in a pre controlled state. In the construction operation, the project department strictly follows the design drawings and construction specifications, takes the construction organization design as the general outline, uses level gauges and theodolites for tracking operations, strictly controls the elevation, verticality, and axis position of steel beam installation, and ensures that unqualified items are not transferred. After completing the construction tasks of the day, the project department conducts detailed and careful self inspection of the completed projects, analyzes and summarizes problems, and rectifies them.
In the construction of the steel structure corridor, the project manager and technical personnel carefully designed the construction plan and comprehensively investigated various factors on site, scientifically and reasonably carried out cross operation with the civil engineering. The components were gradually brought into the site according to the construction progress, successfully solving the difficulties of narrow work site and limited stacking of components, and ensuring the construction progress. Due to the narrow site, the installation of steel beams on site adopts the high-altitude bulk method, which increases the workload of high-altitude installation. Therefore, the project department organizes construction technology disclosure reasonably, conducts three-level safety education and comprehensive safety technology disclosure before starting work every day, strictly stipulates that construction personnel must fully implement operating procedures, set up lifelines and fasten safety belts and other safety protection measures during high-altitude operations, and full-time safety officers conduct on-site inspections and checks throughout the construction process, timely prevent and correct non-standard behaviors, ensure safe construction, and ensure construction progress.
Due to the narrow site and space, difficulties were encountered one after another during the entire construction of the project. In the construction of the Water Drop Restaurant, some trusses were too wide and the available site was narrow, while others were over 2.7m wide. Therefore, loose parts were used for transportation. However, the narrow site caused great difficulties in component assembly. Therefore, during on-site assembly, the project leader successfully solved this major problem again by using empty blocks due to the difference in lifting time and space.
The construction of the Xiangjiang International Building is currently in full swing. After the completion of the steel structure and curtain wall of the entire project, the Xiangjiang National Building will add a new beautiful scenery to Hangzhou, a historic city, and add a leading new style to Hangzhou, a paradise city.
