Assembly for connecting prefabricated short column and foundation under metro vehicle base cover and construction method

Abstract

The invention discloses an assembly for connecting a prefabricated short column and a foundation under a metro vehicle base cover and a construction method, and belongs to the field of building construction. The assembly comprises the cast-in-place foundation and the prefabricated short column, wherein a plurality of bolts are embedded in the foundation, a steel plate is arranged at the bottom of the short column, a plurality of holes are formed in the steel plate and correspond to the bolts, a cavity for adjusting the position of the bolts is reserved in the space, which corresponds to the upper parts of the holes, of the bottom of the short column, slurry is poured into the cavity, and the foundation and the short column are integrally connected through the slurry. According to the assembly, the prior art is slightly modified, the modification cost is low, the operation is convenient and fast, the one-time mounting qualified rate of the short column is increased, the problems of inaccurate positioning of the embedded bolts and influence on hoisting and mounting of the short column due to manual operation and influence of concrete pouring are effectively solved, and the labor cost is reduced.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a component and a construction method for connecting a prefabricated short column under the base of a subway vehicle to a foundation. Background technique [0002] The subway vehicle base is the location of the management center for the parking, inspection, maintenance, operation and repair of urban subway vehicles. Due to the needs of parking and maintenance functions, the vehicle base is designed with a large number of short columns for vehicle maintenance and parking. The quality and progress of short column construction are the key factors to be able to realize car pick-up, parking and trial operation. The short column under the base cover of the subway vehicle adopts a prefabricated assembly structure construction system, which has high requirements for the connection node between the short column and the foundation, the coordinated adjustment deviation between the short...

AI Technical Summary

Problems solved by technology

As a result, the construction space is narrow, formwork reinforcement and concrete transportation and pouring are extremely difficult. At the same time, due to the constraints of the process and surrounding space, the construction must be carried out one by one, resulting in a long construction period;

[0005] 2. The short column cast-in-place must be matched with the track, that is, the short column concrete can only be poured after the track is erected in advance and finely adjusted. This process requires accuracy requirements for the positioning, elevation of the short column reinforcement, and the plane and elevation control of the rail. Extremely high, repeated adjustments are required;

[0006] 3. The steel rail is mounted on the top of the short column, and the steel rail and the short column are connected by a backing plate with a slope and a nylon sleeve, which leads to strict surface flatness and elevation control during pouring of the short column, especially poor elevation control. If there is a gap at the bottom of the backing plate or it is higher than the bottom of the backing plate, it will cause serious quality problems, and the post-processing is extremely difficult and costly;

[0007] 4. In the process of cast-in-place, common quality problems such as honeycomb pockmarks, missing edges and corners will inevitably appear, the repair cost is high, and the quality after molding is difficult to guarantee;

[0008] 5. During the concrete pouring process of the cast-in-place structure, it is inevitable that the concrete will pollute the rails, the ground and other components, and the post-processing will be labor-intensive and time-consuming, and will affect the forming effect of the short column

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