Suspension trestle on water that can be used for pumping concrete and its construction method and application

Abstract

The invention discloses an overwater suspension cable trestle capable of being used for pumping concrete and a construction method and the application of the overwater suspension cable trestle and belongs to the field of bridge construction. The overwater suspension cable trestle comprises Bailey trestle bodies located on the two sides of a navigation hole, a suspension cable trestle body stretching across the navigation hole and connected with the Bailey trestle bodies on the two sides and a concrete pumping pipe installed along the suspension cable trestle body. The construction method of the overwater suspension cable trestle sequentially comprises the following steps that tower column structures and ground anchors are constructed, and cable saddles are installed; main cables, cable clamps and adjustable suspension rods are arranged and installed, and the main cables are transported; the main cables are erected and a line shape is controlled; step battens and a steel wire net face are installed, and the line shape is adjusted; the concrete pumping pipe is installed. The overwater suspension cable trestle capable of being used for pumping concrete is applied to construction of a bridge which stretches across a river or a sea, wherein the navigation clear width is not smaller than 80 m, and the class of waterway is higher than the III glass. According to the overwater suspension cable trestle capable of being used for pumping concrete, it can be guaranteed that the structure is stable, economical performance is high, the construction cost is low, the construction of the structure is convenient and rapid and limitation of the glass of the waterway can be broken through. The overwater suspension cable trestle can be used for pumping concrete.

Description

technical field [0001] The invention belongs to the field of bridge construction and is suitable for the cast-in-place construction of bridges in navigable waters, especially in the case of high navigable grades. Background technique [0002] Equipment (or temporary structures) used in traditional construction: [0003] Due to the influence of the clear width and clear height of the navigation, especially for cross-river and sea-crossing bridges with barges exceeding 1000t and channel grades above III, the clear width of the navigation is required to be not less than 80m. At present, the cast-in-place construction of bridge concrete adopts Three ways to do it: [0004] The first is to disconnect the navigable section of the trestle bridge, and complete the respective concrete preparation, mixing and pumping by setting up concrete mixing stations on both banks of the bridge to be built. Its characteristic is that the project construction on both sides of the bridge will not ...

AI Technical Summary

Problems solved by technology

[0008] Due to the impact of navigation, the first and second schemes above need to disconnect the traditional construction trestle, which will easily lead to poor coordination of construction during the construction process. The two banks of the bridge are respectively equipped with sites for concrete preparation and mixing. The construction site occupies a lot. For concrete prefabricated mixing and pumping equipment, adding a set of equipment requires a corresponding increase in equipment capital investment, and also increases a set of operations. And the management team, these are quite large for today's labor and machinery costs

[0009] Although the second option can save space, it requires a large concrete transportation journey, a lot of freight, and a large loss of concrete trucks (barges), and the long-term transportation is likely to make it difficult to guarantee the quality of the concrete, and it is even possible to Delay in construction progress

[0010] The third scheme combines the advantages of the first two schemes. It not only saves the construction site but also saves a set of concrete preparation and mixing equipment. However, the spanning capacity of this scheme is small. After 30m, the self-weight is large and the stability of the truss members is poor, and its feasibility is easily affected by the level of the channel, especially for the main channel bridges across rivers and seas

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