Abstract:This paper discusses in detail the four methods of determining the length of anchorage section of prestressing anchor cable, and points out the advantages and disadvantages of various methods and the application of the precautions, focusing on the field test method of site selection, construction points, the collection and processing of test data, etc., compared with the other methods, the anchorage length determined by the field test method is more in line with the actual engineering, and therefore more reliable, is the anchor cable project, especially the large-scale anchor cable project, the preferred method of determining the anchorage section length.

Abstract:Anchorage structures are recognized as technologically advanced both at home and abroad, and their contribution to human engineering construction is enormous. However, there are still a number of unquestionable problems in anchored structures that need to be studied and solved. These problems constrain the reliable application and further development of anchored structures. The first problem is the interaction relationship between shear stresses at all interfaces of anchored structures and the design method. According to the data, the systematic research on the interaction relationship between shear stresses at all interfaces of anchored structures has not been reported at home and abroad, while for the design of anchored structures, the domestic and foreign technical standards have adopted the design method based on the average shear stress at the 2nd interface, which does not conform to the engineering reality and a large number of rigorous test results, but also makes the project potentially dangerous, and it is one of the important reasons for the frequent occurrence of engineering accidents, and it should be discarded.

Abstract:This paper introduces the research on the structural characteristics of free-standing single-hole multi-anchor head corrosion-resistant pre-stressing anchor cable and its successful application in the project

Abstract:This paper analyzes the traditional balancing circuit in detail, points out the limitations of the application of the traditional balancing circuit, and at the same time introduces a new type of balancing circuit, which effectively solves the problems of shock vibration and heat generation caused by large energy consumption of the hydraulic cylinders in the hydraulic system in the process of load downstream.

Abstract:This paper introduces the defects of using steel wire rope for the main cable of catwalk, and describes the structure and superiority of using steel strand as the main cable of catwalk.

Abstract:Anqing Yangtze River Highway Bridge is a double-tower, double-surface suspended steel girder cable-stayed bridge, and the cable-stayed cables are made of epoxy sprayed steel strands. This paper focuses on the construction process of cable-stayed cable installation, and introduces the application of auxiliary steel strand in the installation of sheath pipe and single tensioning process.

Abstract:This paper takes Beijing subway line 5 Chongwenmen station project as an example, introduces the structure and support type, construction program and construction method of urban subway station; and discusses the structural waterproofing, ground settlement, excavation and slump prevention of the shallow buried underground project and other related issues.

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