Abstract:Introducing the construction technology of prestressed extracorporeal cables for steel box girders of Beijing Academy Road Interchange Bridge

Abstract:The practical application of large-scale prestressed culvert is the first case in China. This paper introduces the advantages of Dongshen culvert after adopting non-bonded prestressing lining, and elaborates on the structural characteristics of the culvert, the characteristics of OVM new type of anchorage and its application construction in the project.

Abstract:Applying prestressing in mesh shell can effectively adjust the internal force of each rod and ball node, reduce the deformation of the structure, and at the same time, balance the horizontal thrust generated by the mesh shell at the support. This paper introduces the pre-stressing tendon arrangement in the mesh shell and the related pre-stressing construction technology in the context of engineering practice.

Abstract:Introduces two holes on the curve of the arch axis plane is a folding line staggered arrangement of reinforced concrete box arch buckle cable lifting construction program design of several innovations: double sets of cable crane - double stretcher beam lifting the arch ribs in place of the installation system, with a combination of pre-stressing buckling anchor cable system to replace the traditional winch - pulley group buckling, anchor cable system.

Abstract:In the basic structural type often used in cable-stayed bridges, for the beam-tower pier connection type for tower-beam fixed, beam-pier hinged (such as the French Porudongna Bridge, Shanghai Mao Hong Kong Bridge, etc.), tower-pier fixed, tower-beam hinged (or tower-pier fixed, beam-pier hinged, such as the Liaoning Changxingdao Bridge, etc.), or tower-pier fixed, tower-beam separation floating structure (such as the U.S. P-K Bridge, Shanghai Nanpu Bridge, etc.). When hanging orchid cantilever construction, in order to prevent the main beam instability caused by the asymmetric bending moment and horizontal force generated by the construction load on the pier support, must be taken temporary consolidation measures

Abstract:In this paper, a non-destructive testing method for the internal force of prestressing tendons in prestressed structures is proposed, formula derivation and experimental verification are carried out, and applied in engineering practice with good results.

Abstract:This project is a pre-stressed tic-tac-toe building cover with a span-to-height ratio of up to 48. This paper describes the construction process and the characteristics of this project, and also gives the relevant test results.

Abstract:At present, China's geotechnical anchoring project more use of a single tension-type anchoring method and generally do not carry out a better protective treatment of the status quo, this paper introduces the pressure-type anchoring method through the design and application of compression dispersed anchor cable in the highway slope project in Yunnan Province, Wichu - Lengdun, which solves the problem of the need to provide a large tonnage of anchoring force in the weak geotechnical body. In particular, the use of a new material - epoxy fully sprayed non-bonded steel strand as the rod material of the anchor cable body, a better solution to the problem of corrosion prevention in permanent anchoring projects. We hope that this article can play a role in attracting jade for the colleagues of geotechnical anchoring work, so as to improve the geotechnical anchoring method in China.