Abstract:This paper introduces the prestressing system in the large-span self-anchored (self-balancing) basket-type steel-tube-concrete center-bearing tie-arch bridge and explains the important role of prestressing technology in the construction of bridges, in combination with the design of the construction drawings of the Beijing Shipping River Bridge in Pizhou City, Jiangsu Province, China. The new prestressing materials and new anchorage system used in this bridge are also briefly introduced in this paper.

Abstract:This paper introduces a new type of system for tension cables composed of parallel strand bundles arranged in the jacket pipe. Its main performance characteristics are: 1) the strand can be replaced by a single strand, but there are no special requirements for the clamping piece of the group anchor. 2) the cable can be safely and reliably anchored to the bottom of any kind of beam. 3) the protection system of the outer casing drumming into the dry air while pumping out the humid air in the tube keeps the stranded cables in a reliable condition that can be monitored and controlled. 4) the stranded cables are protected by a protective system of the outer casing, which can be used to protect the stranded cables.

Abstract:Introduction to the construction design of the vertical rotation of the steel pipe concrete arch of the Yuanyang River Bridge; hinge seat, hinge axis, buckling anchor cable, temporary tower and cable saddle, continuous traction power system, the hinge axis to the hinge seat of the alignment of the installation system; a brief description of the vertical rotation of the operating procedures; beam jacking method of installation of new technologies

Abstract:This paper introduces the rotation system applied in the construction of Xinzhai Bridge rigid arch horizontal turning construction, and its process and key points in the construction. The engineering practice shows that the construction technology of bridge turning method has become mature, and the key power system of this technology has superior performance and high reliability.

Abstract:This paper mainly introduces the mutual coordination of bonded prestressed concrete construction and cylinder wall slipform construction in oversized diameter circular silo project and the prestressing test and construction process of bonded prestressed concrete construction under special working conditions. The paper mainly introduces the cooperation, coordination and prestressing test method of the two processes.

Abstract:With the gradual improvement of the theory of modern prestressed concrete structure, the continuous development of prestressing technology and technology level, especially the complete set of non-bonded prestressing technology is becoming more and more mature, more and more special structures selected non-bonded prestressed concrete. In this paper, only on the Jiangxi Yadong Cement Ruichang manufacturing plant silo project in the sliding mold construction of non-bonded prestressing construction technology to do an explanation and summary