The prestressed fish-belly foundation pit steel support system is based on the principle of prestress, aiming at the deficiency of traditional concrete inner support and steel support, the fish-belly beam (high strength and low slack steel strand as the winding member, H Section steel as a stress beam, and the length of different; H A new type of deep foundation pit internal support structure system is developed through a large number of engineering research and practical application.
Prestressed fish-belly steel bracing for foundation pitThe system is based on the principle of prestress, aiming at the deficiency of traditional concrete inner support and steel support, the fish belly beam (high strength and low slack steel strand as the winding component,HSection steel as a stress beam, with different lengthsHA new type of deep foundation pit internal support structure system is developed through a large number of engineering research and practical application.
(1) Technical safety
Prestressed fish-belly steel bracing for foundation pitAdvanced foundation pit engineering safety intelligent monitoring and warning and control system is equipped with technology, including data acquisition, processing, graphic display and warning as one of the application system software, can accurately and quickly reflect the production site safety status and other information. Through data comprehensive analysis and processing, it can be realized24Hours of monitoring and warning of hidden dangers. Management and technical personnel can get real-time monitoring results anywhere, understand the safety state of the foundation pit, and direct the elimination of hidden dangers. This not only further ensures the safety of the foundation pit itself, but also more effectively protects the safety of the surrounding structures, municipal roads and pipelines.
A number of additional components (e.g., column brackets, beams, scissors braces, and between vertical and horizontal components) are added to increase system stability and enhance statically indeterminate redundancyUType card, etc.), greatly improve the integrity of the support system, enhance the ability of the system to resist the occasional impact load.
(2) Advanced technology
The advanced technology is manifested in the improvement of design theory and calculation method. Prestress is applied before excavation to produce compressive stress on the soil outside the retaining wall. The active earth pressure generated after soil excavation should counteract this compressive stress first, and the difference value can really act on the steel structure support system. The force on the support is slightly increased, but the displacement of the foundation pit is significantly reduced. Compared with the traditional concrete support, the apparent stiffness of the support system is significantly improved. The discovery of this mechanical mechanism and the formation of theory are the development of foundation pit design and calculation theory.
(3) Green process, short construction period, low cost
Prestressed fish-belly steel bracing for foundation pitThe technology uses low alloy materials, standardized parts, assembled in the project site. After the construction of the underground structure is completed, all the steel components can be recovered and recycled, which is suitable for application in prefabricated buildings.
The technology not only greatly reduces the construction period and cost of the installation and demolition of the supporting structure, but also provides open construction space, significantly improves the working conditions of the underground engineering, makes the excavation, soil transport and underground structure construction convenient, and reduces the construction period and cost of the earth excavation and the main structure construction. Compared with the traditional concrete support, the cost is reduced20%Above, the whole foundation pit construction period is shortened40%The above.
Construction site of steel support technology for prestressed fish-belly foundation pit
Traditional steel support technology construction site
The engineering case
Foshan Wrigley Headquarters Building
The star of ice and snow
Orange star garden
Shanghai Qiangqiang Foundation Engineering Co., LTD. 's business covers foundation pit engineering, pile foundation engineering, land and waterFoundation treatment, slope treatment and other engineering fields. Around" Excellent technology, reliable process", construction fast "technical requirements,Is to provide customers with land, water foundation engineering technical consultation, construction services and other comprehensive solutions of the entity enterprise.Contact Number: 400-100-2850
