The method of pushing the curved bridge by foot

Abstract

A method of stepping on a curved bridge. Multiple sets of jacking units are arranged on the inner and outer sides of the pier, and the jacking units are located on the equidistant circular curves on both sides of the bridge centerline, namely the outer jacking trajectory line and the inner jacking trajectory line. It is arranged in the center along the tangential direction; an electro-hydraulic proportional speed control valve is set on the oil inlet oil circuit of the jack of the jacking unit. The cylinder can be extended at a speed with the same stroke ratio; during the jacking process, the photoelectric sensor detects the deviation of the main beam in real time. Whether correction is required; correction is performed when the correction jack exceeds the standard. The advantage is that it can automatically follow the curve trajectory without stopping the adjustment, and at the same time, it can rectify the deviation dynamically in real time.

Description

technical field [0001] The invention relates to the technical field of construction for civil engineering, in particular to a method for pushing a curved bridge by foot. Background technique [0002] Continuous jacking technology has been more and more widely used in translational construction of large components. For large-span structures such as bridge main beam jacking construction, the walking jacking construction method is a novel and effective construction method. The current walking type jacking equipment is generally used in the working condition of linear jacking. For the working condition where the jacking trajectory is a curve, such as a curved bridge, the linear control is more difficult. The invention with the application announcement number CN 104790298 A discloses a jacking device and a jacking method for construction of a continuous beam frame. The beam is leveled by a plurality of groups of jacking devices arranged on the same circular arc in the circumfere...

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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