Construction method for alternative graded synchronous integral jacking of broken bridge posts

Abstract

The invention discloses a construction method for alternative graded synchronous integral jacking of broken bridge posts. The construction method is mainly characterized in that various safe supporting and limiting structures, multidirectional synchronous monitoring means, various safety insurance devices, a high-precision electronic automatic computation and correction system, and whole-process and all-around synchronous cooperation are adopted to fulfill integral jacking. Moreover, 180 full-automatic high-precision and large-stroke PLC hydraulic synchronous jacking control systems, which are advanced in China, are adopted, so that the synchronous control precision reaches +/-2 mm; PLC hydraulic synchronous control is configured with a hydraulic lock-and-mechanical lock double insurance device; a precise measuring and monitoring system is mounted at the key position of each component; synchronous control of jacking height and displacement is realized in a whole-process and high-precision manner; synchronous jacking, of an integral bridge, of high clearance, large area and heavy weight can be realized efficiently and safely; the method can also be used for reference of construction of bridge jacking, pushing and rectification; the social and economic value is high.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for synchronous jacking up of a bridge as a whole. Background technique [0002] Due to the needs of my country's reform and opening up and rapid economic growth, large-scale infrastructure construction began in the middle and late 1990s. Most roads and bridges were built during this period. Based on the design technology, construction operation technology, construction equipment, vehicles The impact and limitations of traffic flow and urban development planning, especially the investment in urban construction, bridge design level, linearity and longitudinal slope design of the line are generally low. [0003] However, with the strengthening of China's comprehensive national strength, the in-depth development of world multi-polarization, economic globalization, cultural diversification, and social informatization, the highway industry has a larg...

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Problems solved by technology

[0003] However, with the strengthening of China's comprehensive national strength, the in-depth development of world multi-polarization, economic globalization, cultural diversification, and social informatization, the highway industry has a large-span and unconventional development in terms of construction scale and construction standards. The reduction of bearing capacity of old bridges, bridge settlement, rapid increase in traffic volume, improvement of navigation level, improvement of underpass road level, route reconstruction, etc. cause insufficient clearance under the bridge, and the function of the bridge cannot meet the requirements

If it is demolished and rebuilt just because the linearity is not satisfied and the clearance under the bridge does not meet the requirements, it will cause huge waste

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