Abstract:In view of the problem of poor durability of the prestressed anchorage system of suspension bridge in China, a new type of grease anti-corrosion prestressed anchorage system with good durability, more safety and reliability and characteristics of "detectable" and "replaceable" is proposed in this paper. The system has been tested by static and dynamic loading and deformation tests, installation, oil change and prestressed steel bundle construction tests, and the research results have been applied to the anchorage project of suspension bridge.

Abstract:This paper presents the results of the study on the reinforcement design of a slope in Ho Chi Minh Road, Vietnam. It is pointed out that the best mechanical index for slope design calculation is the data obtained from geological investigation and field investigation inversion. Through the Ho Chi Minh Road slope design study, the author realized that the slope between soil and rock slope using the plane slide model analysis and the circular slide model analysis results are basically the same. Therefore, the author comes to the following understanding: in a sense, the task of slope engineering design is not to carry out accurate calculation, but to carry out correct judgment. In this paper, it is proved that the geological condition is the main internal factor affecting the stability of slope, and the water is the main external factor affecting the stability of slope. Therefore, water treatment and control is a problem that slope reinforcement engineering must solve.

Abstract:This paper introduces the application of prestressed technology in the Olympic shooting gallery project. One of its features is that the prestressed temperature bar is centrally arranged in the beam, and the prestressed bar is segmented and stretched by means of a connector. The second feature is that the cast-in-place prestressed special-section hollow plate is used to improve the hollow rate of the plate under the premise of convenient construction.

Abstract:Due to the special geographical conditions near Daguu Island, the Donghai Bridge adopts the prestressed concrete pushing continuous beam structure. The bridge is on a circular curve with a radius of 2500 meters and the total length of the pushing beam is 400 meters. This paper introduces the structural design features of this section. The plane analysis program is used to check the structure safety in the construction stage. The design of construction technology and some special construction measures to meet the requirements of curve pushing in construction are emphatically introduced.

Abstract:1. The raising of the question. When hanging basket cantilever casting, hanging basket cantilever assembly, hanging basket to bear the weight of the entire beam segment, hanging basket itself weight is very considerable, and hanging basket weight by the poured box beam beam to bear. This increases the internal force of the beam during construction, how to reduce the internal force of the beam during construction, so as to make it as consistent as possible with the internal force requirements of the beam during operation, which is one of the problems of design and construction, the use of hanging basket construction due to the weight limit of concrete segments, the length of each segment is generally about 3 to 4 meters, and the construction period of each segment is about 7 to 10 days on average. In this way, the total construction period is relatively slow and long, especially when the hanging basket is used in the construction of long-span cable-stayed bridge, not only the construction period is more, but also because the weight of the hanging basket is large, the internal force of each section of the cable is controlled in the construction stage, increasing the amount of steel bundle, in addition, the cable force must be adjusted repeatedly, which brings a lot of inconvenience to the design and construction.

Abstract:This paper introduces the basic principle, construction key points and precautions of suspension tensioning method, which is a new tensioning technology used in the tie rod tensioning of Changjiang Branch I bridge in Jingdezhen City, and compares the advantages and disadvantages of ordinary tensioning method and suspension tensioning method.

Abstract:It can be said that Xiaowan Hydropower Station is unique in the construction of similar projects in terms of the complexity of engineering geology, the difficulty of slope protection and the arduous construction task. This paper mainly introduces and analyzes the construction of the 2# mountain beam rescue slope project and the special construction technology adopted in the construction for extremely complex geological conditions, focusing on the drilling construction technology and method of eccentric drilling with pipe drilling and double pipe relay drilling, and the author's construction in order to solve the problem of no wind running and no leakage of large cracks at different depths in the hole At the same time, the author puts forward some improvement suggestions on the imperfections still existing in the rescue engineering design, hoping to play a role in promoting the faster development of geotechnical anchoring engineering technology in our country.

Abstract:This paper will introduce the technical development status of Taiwan's Bridges and the representative works in recent years. It will also discuss the problems faced by Taiwan's Bridges and the prospect of sustainable development.