Fabricated deviation adjustment high-strength steel bar mechanical connecting device and construction method

Abstract

The invention discloses an assembly type deviation adjustment high-strength steel bar mechanical connecting device and a construction method. The assembly type deviation adjustment high-strength steel bar mechanical connecting device comprises an upper connecting plate, a lower connecting plate, a filling plate and two prefabricated plates. Mounting grooves are formed in the bottoms of the opposite surfaces of the two prefabricated slabs, and reinforcing steel bars are arranged in the two prefabricated slabs; the ends of the steel bars in the two prefabricated slabs stretch out of the mounting grooves and stretch into the upper connecting plate and the lower connecting plate, the ends of the two steel bars are oppositely arranged, and the upper connecting plate and the lower connecting plate are connected through bolts. Two filling plates are arranged between the upper connecting plate and the lower connecting plate and located on the two axial sides of the steel bars respectively, the distance between the two filling plates is larger than the diameter of the steel bars, and the thickness of the filling plates is smaller than the diameter of the steel bars. And under the condition of axis deviation of different steel bars, rapid equal-strength connection is realized.

Description

technical field [0001] The invention belongs to the field of civil engineering and assembly structures, and relates to an assembly-type deviation-adjusting high-strength steel mechanical connection device and a construction method. Background technique [0002] The connection node in the prefabricated structure is one of the key technologies, especially the connection node of the steel bar in the prefabricated concrete structure. At present, the steel bar connection methods in the prefabricated structure include grouting sleeve connection, post-cast concrete anchor connection, welding connection, threaded sleeve connection, extrusion sleeve connection and other connection methods, which have different degrees of technical defects. The size of the grouting sleeve itself is relatively large, which weakens too much the cross-section of concrete members such as floors or shear walls that are mainly stressed in the plane, and the grouting is a hidden project with poor reliability...

AI Technical Summary

Problems solved by technology

The size of the grouting sleeve itself is relatively large, which weakens too much the cross-section of concrete members such as floors or shear walls that are mainly stressed in the plane, and the grouting is a hidden project with poor reliability. Difficult to remedy; post-casting with concrete anchorage connection requires reservation of beard tendons on the plate, which is easy to be bent and deformed during transportation and installation, and it needs to wait until the concrete hardens before it can bear the load, which is time-consuming and laborious; welding connection, on-site construction is faster, but in large earthquakes The heat-affected zone of the lower weld seam is prone to brittle fracture, and the welding quality on site is difficult to guarantee, and the reliability is poor; the threaded sleeve connection requires pre-threading of the steel bar, and the effective force-bearing section of the steel bar is reduced by about 25%, making it difficult to achieve equal strength connections , although the rough tapping of the steel bar pier can increase the effective force-bearing area of ​​the steel bar, but for the small diameter steel bar (d<16), the diameter of the steel bar is generally negative, it is difficult to fit the sleeve in place, the construction operation is difficult and the cost is high, In addition, the steel bars in the prefabricated components cannot be rotated and cannot be used directly; extrusion sleeves require a large construction space and cannot be used directly between prefabricated concrete components

[0003] In precast concrete components, due to the vibration of concrete pouring, the axis deviation of the steel bars at the corresponding positions of different components is inevitable, which makes many threaded connections with strict axis alignment unusable

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