Prefabricated assembly type steel-concrete mixed cantilever structure system for widening road and construction method

Abstract

The invention discloses a prefabricated assembly type steel-concrete mixed cantilever structure system for widening a road, and relates to the field of steel-concrete mixed structures in road structures. The system comprises a cantilever beam which comprises a first-section concrete precast block, a third-section concrete precast block, a second-section concrete precast block and a plurality of steel member joint devices. The steel member joint devices are arranged at the two ends of the second-section concrete precast block; the first-section concrete precast block is connected with the steel member joint device at one end of the second-section concrete precast block, and the third-section concrete precast block is connected with the steel member joint device at the other end of the second-section concrete precast block. The cantilever beam is cut, partitioned and prefabricated, the weight of each partitioned block can be controlled according to needs, and the problem that a storage site, transportation equipment and hoisting equipment are difficult to select due to the fact that the weight and the size are too large is solved. The invention further relates to a construction method of the prefabricated assembly type steel-concrete mixed cantilever structure system for widening the road.

Description

technical field [0001] The invention relates to the field of steel-concrete mixed structures in road structures, more specifically, it relates to a prefabricated assembled steel-concrete mixed suspension structure system for widening roads. The invention also relates to the construction method of the prefabricated steel-concrete mixed suspension structure system for widening the road. Background technique [0002] In the road widening project, it is very difficult to widen the road due to the constraints of buildings and terrain (such as mountains on one side and ravines on the other; The cantilever structure cantilever the sidewalk or roadway; the cantilever structure solves the problems of difficulty in expansion, limitation of river flood section, difficulty in land acquisition and demolition, and provides a very good solution for road widening projects that are increasingly in demand. [0003] However, the establishment of the cantilever structure system is another big ...

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Problems solved by technology

[0003] However, the establishment of the cantilever structure system is another big problem: some schemes adopt the form of adding anchor cables at the root of the cantilever structure; other schemes use larger and heavier cantilever beams; , the greater the length of the outer cantilever section, the greater the price paid for anti-overturning; the use of anchor cables at the root of the cantilever structure requires good anchoring conditions for the embankment foundation, and the reliability and durability of the anchor cables will decrease over time. The growth rate keeps decreasing; the reliability and durability of larger beams can be guaranteed, but too large beams will face the problem of having to use on-site pouring and a longer construction period, or face the problem of difficult transportation of overweight prefabricated beams

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