Prefabricated assembly type toughness combined bridge deck slab with cast-in-place wet joints and manufacturing method

Abstract

The invention discloses a prefabricated assembly type toughness combined bridge deck slab with cast-in-place wet joints and a manufacturing method. The combined bridge deck slab is composed of profile steel combined prefabricated parts, prefabricated connecting parts, high-strength bolts and cast-in-place ultrahigh toughness concrete. In the section steel combined prefabricated parts, a bolt hole is formed in a flange of wide hot-rolled H-shaped steel, a transverse round steel bar is welded to a flange plate on the wide hot-rolled H-shaped steel, and ultrahigh-toughness concrete is poured after the high-strength bolts and screws are pre-embedded. In the prefabricated connecting parts, a bolt hole is formed in a flange of narrow hot-rolled H-shaped steel, and a transverse round steel bar is welded on a flange plate on the upper side of the narrow hot-rolled H-shaped steel. In the construction process, the section steel combined prefabricated parts and the prefabricated connecting parts are arranged side by side at intervals, the prefabricated parts are connected into a whole through the high-strength bolts, and the ultrahigh-toughness concrete is cast in situ on the upper portions of the prefabricated connecting parts, so that the cast-in-situ wet joints are formed. The system provided by the invention has the advantages of high toughness, high prefabrication degree, no need of arrangement of studs, no need of field welding, low cast-in-place concrete proportion, convenience in construction and remarkable improvement of structural fatigue performance.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a prefabricated assembly tough composite bridge deck with cast-in-place wet joints and a manufacturing method. Background technique [0002] With the continuous advancement of my country's infrastructure construction process, people realize that the convenience of intra-city traffic and inter-city traffic greatly affects the development of the national economy and social progress; therefore, the country has achieved great development in road and bridge engineering in recent decades . Among them, bridge structures are not only widely used in urban overpasses, subway light rails, high-speed railways, etc., but also in river-crossing and sea-crossing structures. In recent years, with the construction of super-large bridge projects such as the Hong Kong-Zhuhai-Macao Bridge and the Hangzhou Bay Bridge, bridge structures at home and abroad are facing unprecedented opport...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the existing steel-concrete composite bridge deck: First, in order to ensure the sufficient shear connection between steel and concrete and prevent the detachment of the two interfaces, more bolts are usually arranged between the two Nails (playing the dual role of shear resistance and pull resistance), which greatly increases the construction workload, and the fatigue performance of the structure is affected due to the existence of welds; second, the steel deck part of the composite bridge deck usually needs to be welded out of the plane Multiple stiffeners, which also increase the amount of construction and affect the fatigue performance of the structure; third, ordinary concrete materials are prone to cracking under tension, and are sensitive to local defects, and are prone to cracks under long-term loads, causing water and ion erosion, affecting The corrosion resistance and durability of the bridge deck will significantly increase the repair and maintenance costs of the bridge structure, causing a huge waste of manpower and material resources; fourth, the steel structure part of the existing composite bridge deck system is usually welded on the construction site. The on-site workload is heavy and the construction quality and precision are difficult to guarantee

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