Graded pushing trolley system for bridge continuous pushing operation and construction method

Abstract

The invention discloses a graded pushing trolley system for bridge continuous pushing operation and a construction method. The system comprises a hydraulic pushing sliding device, a sliding way, an automatic control system, a positioning device and a stress monitoring device; wherein the front hydraulic heavy-load jack and the rear hydraulic heavy-load jack jack at the same time and lift a bridge body, the rear hydraulic rail clamping device is clamped, the front hydraulic rail clamping device is loosened, and the rear hydraulic jack is controlled to conduct forward jacking operation; after the rear hydraulic jack is pushed to the preset length, the rear hydraulic rail clamping device is loosened, the rear hydraulic jack is retracted, meanwhile, the front hydraulic rail clamping device is tightened, and the front hydraulic jack is controlled to conduct forward pushing operation; the automatic navigation control system assists pushing through a positioning device and a stress monitoring device; and the front pushing device and the rear pushing device circularly work to realize continuous pushing. The system and method has the advantages of being high in pushing speed, high in continuous operation capacity, capable of dynamically adjusting the pushing direction, capable of preventing rail jamming caused by curve pushing and the like.

Description

technical field [0001] The invention relates to the technical field of long-span bridge jacking construction, in particular to a hierarchical jacking trolley system and a construction method for continuous bridge jacking operations. Background technique [0002] By the end of 2020, the total mileage of expressways in my country has reached 161,000 kilometers, and the operating mileage of railways in my country has reached 139,000 kilometers, ranking first in the world. Emerging, in view of the limitations of manufacturing sites, transportation methods, navigation and other aspects encountered in the construction of long-span bridges, especially the urban elevated bridges spanning main roads and bridges spanning navigable rivers, the jacking construction method came into being. The jacking method uses a jack and a plate sliding device to push the beam body, which improves the bridge construction method. [0003] At present, many problems have been encountered during the jacki...

AI Technical Summary

Problems solved by technology

[0003] At present, many problems have been encountered during the jacking construction, such as slow jacking speed, short jacking distance, poor continuous jacking performance, small-radius curved bridge jacking is easy to deviate, and the curve jacking distance is too long to easily get stuck on the rail. This leads to a slow construction process and affects the overall progress of the project. At the same time, the economic losses caused by the closure of flights will also expand

In response to the above problems, many control measures have also emerged. For example, the multi-point dragging continuous jacking construction method is a construction method that is widely used in China. Although it can achieve the purpose of continuous jacking, it has high construction costs and slow speed. , poor protection of finished beams and other defects; the construction of multi-point self-balancing walking jacking method has the advantages of improving construction efficiency and reducing costs, but it requires multiple equipment to work at the same time, and the operation requirements are high. Construction accuracy needs to be improved

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