A segmented removable concrete pre-embedded screw and its application method

Abstract

The invention discloses a sectional type concrete pre-buried screw rod capable of being taken out and a using method thereof. The pre-buried screw rod comprises a screw rod body, the screw rod body comprises an unthreaded rod section and a large-threaded section, and the unthreaded rod section and the large-threaded section are designed in split; a second through hole is formed in the center of the large-threaded section in the axial direction, a plurality of through holes are formed in the large-threaded section in the radial direction, and a connection part is installed on the inner wall of the large-threaded section; the unthreaded rod section comprises a split shear resisting section and a filling section, a counter bored hole is formed in the center of the shear resisting section in the axial direction, and a first through hole is formed in the center of the filling section in the axial direction; and the counter bored hole, the first through hole and the second through hole form a cavity, a connecting rod connecting the shear resisting section, the filling section and the large-threaded section into a whole is installed in the hole, one end of the connecting rod is provided with a boss, and the other end of the connecting rod is in threaded connection with the second through hole. The sectional type concrete pre-buried screw rod can be taken out of concrete and recycled, and liquid of silica gel and the like can be injected to increase friction force between bolts and the concrete.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a section-type removable concrete pre-embedded screw and a using method thereof. Background technique [0002] With the development of the construction industry, the degree of mechanization of engineering (especially super high-rise) construction has been continuously improved, and various heavy construction equipment (tower cranes, elevators, formwork, etc.) need to use a large number of steel embedded parts, steel corbels and other measures. The anchor bars, anchor plates and vertical plates of the steel embedded parts are pre-embedded in the concrete structure, and cannot be taken out for turnover, resulting in a large waste. Most of the corbels are welded on site, and they need to be cut off after use, which affects the construction period. At the same time, it is difficult to control the quality of the welds and poses a high safety risk. It can be ...

AI Technical Summary

Problems solved by technology

The anchor bars, anchor plates and vertical plates of steel embedded parts are pre-embedded in the concrete structure, and cannot be taken out for turnover, resulting in a great waste

Most of the corbels are welded on site, and they need to be cut off after use, which affects the construction period. At the same time, it is difficult to control the quality of the welds and poses a high safety risk.

It can be seen that these steel embedded parts cannot be turned over and used, and the cost is high, and the construction process of these measures is complicated, involving factory production of components, on-site high-altitude welding, and cutting off after use, which requires a lot of labor and high risk

[0003] In addition, in order to increase the friction between the steel embedded parts, steel corbels and concrete, steel bars are usually welded at the end of the anchor bars of the steel embedded parts to increase the meshing force between the steel embedded parts and the concrete, but this increases the construction labor. The investment of cost and funds also increases the difficulty of installing steel buried panels

Images