Abstract:Nanchong Qingquansi Jialing River Bridge is a special bridge across the Jialing River on the Chengdu-Nanchong Expressway in the Nanchong Ring Connection, which is located in the north of Nanchong City. The upper main span is a 2×110m continuous rigid structure; the approach bridge is a 40-hole 30m partially prestressed (Class A) simply supported T-beam, 5 holes in a row, with a continuous deck. The lower part of the main span is Φ2.2m group pile foundation with double thin-walled piers; the approach bridge is Φ2.0m double-column piers with prestressed differential girders. The article from the design point of view of some of the characteristics of the bridge for a more detailed introduction, in order to be able to throw a brick to attract jade, the inadequacy of the hope that everyone corrected!

Abstract:This paper mainly introduces the construction and test of earth anchors for Huai'an three-lane locks. In the weak soil layer and complex soil conditions, the use of decentralized compression type anchor cable structure characteristics, through the soil anchor test, modify the design, improve the construction process and other comprehensive measures to ensure that the design bearing capacity. It plays a great role in the application and development of soil anchors in the future.

Abstract:This paper comprehensively introduces the development process and technical characteristics of ZB618 type ultra-high pressure electric oil pump, as well as the superiority and application prospects of this oil pump.

Abstract:Steel bridge construction technology should include substructure construction, superstructure construction of two parts, here substructure construction is omitted, superstructure construction refers to beams, arches, ropes and other steel structure construction technology. Overall in the construction of large-span bridges, steel bridge construction than prestressed reinforced concrete bridge light and convenient, which is mainly due to the lightweight components, and lightweight components and high strength, high modulus of elasticity due. First, the construction of steel girder arch ring general for beam, arch ring construction can be summarized as follows: a) bracket method; b) top push method (for steel bridges can be for the arm method, fishing method, floating method); c) rotary method; d) cantilever method; e) large-scale equipment construction method and so on.

Abstract:With the development of China's bridge and construction technology, in order to minimize the cost of the project, there are more and more projects requiring super-deep hand-dug piles under complex geological and topographical conditions, and the technical difficulty is far beyond the specification requirements, which is detrimental to the safety of the dug-hole operation. This paper describes in detail the derivation of the formula for calculating the thickness of the retaining wall, which is directly related to the construction technology and safety of super-deep hand-dug piles under complicated geological conditions, and at the same time, combines the calculation formula with the engineering examples to explain the application of the formula.

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