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Feb 09,2026
Application and Practice of Prestressed Tensioning and Grouting Technology in Bridge Engineering
In modern bridge engineering construction, prestressed tensioning technology has become an essential construction method. By applying external loads, prestressed tensioning introduces specific stresses in steel reinforcement or steel cables, thereby enhancing the structural load-bearing capacity and resistance to deformation. However, during the prestressed tensioning process, grouting is required to protect the prestressing tendons from corrosion and prestress loss. This article focuses on the role, construction methods, and key considerations of cement mortar grouting in prestressed tensioning and grouting.
Feb 09,2026
With the rapid economic development, China’s highway and bridge construction has achieved remarkable progress and refinement, and engineering construction technology has also seen substantial improvement. Prestressed technology has undergone continuous enhancement and maturation during this process, gradually becoming an indispensable key technology in highway bridge construction. In an era of ever-advancing science and technology, prestressed technology, with its unique advantages, is poised to embrace even broader development prospects. It will not only further extend the service life of highway bridges but also continuously elevate their quality standards. Therefore, in the construction process of highway bridges, we must closely monitor construction procedures in line with actual conditions to ensure the scientific soundness and rationality of construction plans. Simultaneously, we need to enhance the professional competence of construction personnel and accumulate practical experience to promote the wider application of prestressed technology in highway bridge construction, thereby achieving rapid development in both economic and social benefits.
Feb 09,2026
As China’s transportation infrastructure construction advances toward long-span, high-quality, and long-lasting development, prestressed technology has become a core method for optimizing bridge structures and enhancing engineering efficiency. It is now widely applied in various bridge designs and constructions, from urban interchanges and cross-sea bridges to conventional highway bridges and high-grade railway bridges. The continuous innovation and upgrading of this technology are injecting strong momentum into China’s bridge engineering industry, driving a leap in bridge design characterized by safety, efficiency, economy, and environmental sustainability.
Dec 10,2019
Recently, the revision of the Technical Specifications for Prestressed Construction of Highway Bridges, led by the Highway Science Research Institute of the Ministry of Transport, has officially commenced. This revision will incorporate advancements in new technologies, materials, and construction techniques within the field of bridge prestressing in recent years, aiming to further improve the standard system and guide the industry toward standardized and high-quality development. Since its implementation in 2015, the original specifications have served as a crucial technical foundation for prestressed construction of highway bridges in China. However, with the rapid development of industry technologies, certain provisions have become inadequate in meeting engineering demands under new circumstances.
Dec 10,2019
In recent years, the prefabricated assembly bridge construction model has been rapidly promoted across China, with corresponding prestressed construction techniques for prefabricated assembly bridges also maturing. Leveraging advantages such as high construction efficiency, strong quality controllability, and environmental sustainability, these techniques have been widely applied in numerous urban and expressway bridge projects nationwide, effectively enhancing the quality and efficiency of bridge engineering construction. According to statistics, bridge projects utilizing this technology have seen an average reduction of over 30% in construction duration, a 50% decrease in on-site labor, and an improvement in project quality compliance rates to over 99%.
Feb 09,2026
Differences and Applications of Pre-tensioned Prestressing and Post-tensioned Prestressing
In construction engineering, prestressing technology is an important structural strengthening and optimization method. It improves the mechanical performance of components under service conditions by introducing stress in advance. Prestressing technology is mainly divided into two types: pre-tensioned prestressing and post-tensioned prestressing. These two methods differ in principles, construction techniques, and application scenarios. This article provides a detailed explanation of the differences and respective applications of pre-tensioned and post-tensioned prestressing.
Feb 01,2026
Key Issues to Focus on During the Construction of Prestressed Anchorage
A prestressed anchor is a type of anchorage device suitable for various engineering construction processes. It is used for prestressed tensioning in concrete and is commonly employed in bridge construction. During use, it should be positioned in advance, followed by concrete pouring, and embedded at both ends of the concrete. In the construction of prestressed anchors, the following nine issues should be noted:
Dec 10,2019
Recently, a new-generation bridge prestressed structure health monitoring system, developed by a smart technology company, completed its upgraded deployment on the Hangzhou Bay Bridge. This system integrates cutting-edge technologies such as fiber optic sensing, big data analytics, and artificial intelligence, enabling intelligent full-lifecycle maintenance and operation for bridge prestressed structures and significantly enhancing the safety assurance capabilities of bridges. As a critical transportation hub in China, the Hangzhou Bay Bridge is influenced by various factors including sea winds, tides, and vehicle loads, making the health status of its prestressed structures directly impact the operational safety of the bridge.
Feb 03,2026
Discussion on the Sequence and Construction Key Points of Prestressed Tensioning
Industry experts point out that the sequence of prestressed tensioning is not fixed; it must be determined comprehensively based on factors such as bridge structure type, load-bearing characteristics, construction techniques, and operational safety. The core principle is to adhere to the basic guidelines of "uniformity, symmetry, and gradual progression," avoiding hidden risks such as structural torsion, lateral bending, or local overstress caused by unbalanced tensioning. According to the requirements of the *Code for Construction of Concrete Structures (GB50666-2011)*, different structural forms of bridges have clear specifications for tensioning sequences.
Dec 10,2019
Recently, a new type of unbonded prestressed steel strand, jointly developed by a technology company and a university, officially passed testing by a national authoritative institution. The product's performance indicators surpass current national standards, achieving significant breakthroughs in corrosion resistance, fatigue resistance, and environmental performance. This provides new material support for the green and low-carbon construction of bridge engineering. The product has already been successfully applied in a river-crossing bridge project in the Pearl River Delta region, with expectations to extend the service life of the bridge's prestressed structures by over 15 years and reduce lifecycle maintenance costs by 30%.
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