Curved bridge step pushing method

Abstract

The invention relates to a curved bridge step pushing method. Pluralities of sets of pushing units are arranged on the outer side of a pier and on the outer side of the pier. The pushing units are arranged on the circular curves with equal distances on both sides of the bridge centerline, namely, the outer pushing trajectory line and the inner pushing trajectory line, and are centrally arranged along a tangential direction. An electro-hydraulic proportional speed regulating valve is arranged on the oil inlet of the jack of the pushing unit, and the piston of the pushing jack on both sides extends the cylinder at a speed consistent with the ratio of the pushing stroke on both sides by regulating the oil inlet flow of the pushing jack; In the pushing process, the photoelectric sensor detectsthe deviation of the main beam in real time, and determines the deviation direction and degree of the main beam by detecting the detection lines of the two different colors by the photoelectric sensor, and determines whether the deviation needs to be rectified or not; when the jack exceeds the standard, the deviation can be corrected. Its advantages are that it can walk automatically according tocurve trajectory without stopping and adjusting, and it can dynamically rectify deviation in real time. The method has high efficiency, simple structure of pushing setting, small workspace and low cost.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a method for pushing a curved bridge by walking. Background technique [0002] Continuous jacking technology has been more and more widely used in translational construction of large components. For long-span structures such as bridge girder jacking construction, walking jacking construction method is a novel and effective construction method. The current walking-type jacking equipment is generally used in straight-line jacking conditions. For working conditions where the jacking trajectory is curved, such as a curved bridge, linear control is more difficult. The invention with the application announcement number of CN 104790298 A discloses a jacking device and a jacking method for continuous beam erection construction. The beam is leveled by multiple sets of jacking devices arranged on the same arc line along the circumference of the permanent pier. Push...

AI Technical Summary

Problems solved by technology

However, this method has disadvantages: when the curve is adjusted, the jacking operation must be interrupted, and the jacking process is intermittent, and the efficiency is low

[0003] The applicant has been authorized and the patent No. ZL201620588250.6 is the patent "Pumping Station of Walking Pushing System", which discloses a pumping station of walking pushing system, which can realize vertical lifting system, longitudinal pushing system, The dynamic deviation correction system and other subsystems are integrated together, and one system can meet the functions of vertical lifting, vertical and horizontal pushing and horizontal automatic deviation correction, but this equipment has certain limitations: although the same pumping station can control multiple jacks, but the loading speeds of multiple jacks of the same model working at the same time are basically the same, and they cannot run at different loading speeds at the same time, so they cannot meet the requirements of automatic pushing according to the arc curve.

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