A single-point continuous jacking construction method for cross-line bridges over railways and expressways

Abstract

The invention discloses an overcrossing railway and expressway cross-line bridge single-point continuous incremental launching construction method adopting a series straight-through type continuous jack, a steel strand bundle, an automatic tool anchorage, a rear reaction frame and a front anchoring end system to achieve continuous incremental launching. Through the continuous work of the jack, theincremental launching construction of one section of a beam body can be continued to enhance the incremental launching speed of the beam body; the construction method is formed by improving, innovating and optimizing the actual situation of the overcrossing railway, expressway cross-line bridge based on the mature incremental construction technology at home and abroad; and the overcrossing railway, expressway cross-line bridge single-point continuous incremental launching construction method is especially suitable for the cross-line bridge which has the condition that railway interests demands supervisors to inform construction in railway window time course, the automation degree of incremental launching equipment is high, the construction progress is high, and the beam body is high in speed, stable in running and safe and reliable in the pushing process, and has little affect to existing lines.

Description

technical field [0001] The invention relates to the field of single-point continuous jacking construction, and specifically relates to a construction method formed by improving, innovating and optimizing the actual conditions of over-the-road bridges over railways and expressways. Background technique [0002] With the continuous development of expressways and railways in our country, there are more and more over-the-line bridges that span railways and expressways. Because over-the-line bridges are affected by factors such as construction time, construction site, and net height restrictions, bridges can rotate or The prefabricated installation of beams and slabs requires a lot of measures and costs, resulting in long construction periods, high costs, and high safety risks, which cannot meet the construction needs of specific environments. Contents of the invention [0003] The purpose of the present invention is to solve the problem that due to the influence of factors suc...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that due to the influence of factors such as construction time, construction site, and net height restrictions on cross-line bridges, a large amount of measures must be invested in the prefabricated installation of bridge swivels or beams and slabs, resulting in long construction periods, high costs, and high safety risks. and other defects, which cannot meet the construction needs of specific environments; here, a single-point continuous jacking construction method is provided for cross-line bridges over railways and expressways, so as to make full use of the construction time and complete the construction safely and reliably Task

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